Major refactor and API changes

- Updated `.gitignore` file
- Updated `CMakeLists.txt` to build static exectuable
- Changed some `Doxyfile` configurations to build more robust and complete documentation (WIP)
- Changed how `remote` works to better reflect `git`'s API (WIP)
- Changed how error handling works
- Improved `bin/compile.sh` script
- Improved `bin/lines.sh` script (kinda)
- Removed some instances of `fmt` in favor of `std` string functions
- Restructed style for better readibility

.gitignore

@@ -1,7 +1,8 @@
 build/**
 builds/**
 bin/gdpm
-bin/gdpm-tests
+bin/gdpm.static
+bin/gdpm.tests
 docs/doxygen
 cache/**
 tests/*

CMakeLists.txt

@@ -43,25 +43,30 @@ set(LINK_LIBS
 	SQLiteCpp
 	-lcurlpp
 	-lzip
+	-lsqlite3
+	-lcurl
 )
 
 # Set library and executable targets
 add_library(${PROJECT_NAME}-shared SHARED "${SRC}")
 add_library(${PROJECT_NAME}-static STATIC "${SRC}")
 add_executable(${PROJECT_NAME} "src/main.cpp")
-add_executable(${PROJECT_NAME}-tests "${TESTS}")
+add_executable(${PROJECT_NAME}.static "src/main.cpp")
+add_executable(${PROJECT_NAME}.tests "${TESTS}")
 
 # Set include directories for targets
 target_include_directories(${PROJECT_NAME} PRIVATE ${INCLUDE_DIRS})
+target_include_directories(${PROJECT_NAME}.static PRIVATE ${INCLUDE_DIRS})
+target_include_directories(${PROJECT_NAME}.tests PRIVATE ${INCLUDE_DIRS})
 target_include_directories(${PROJECT_NAME}-shared PRIVATE ${INCLUDE_DIRS})
 target_include_directories(${PROJECT_NAME}-static PRIVATE ${INCLUDE_DIRS})
-target_include_directories(${PROJECT_NAME}-tests PRIVATE ${INCLUDE_DIRS})
 
 # Set link libraries for targets
 target_link_libraries(${PROJECT_NAME} PRIVATE ${PROJECT_NAME}-shared ${LINK_LIBS})
+target_link_libraries(${PROJECT_NAME}.static PRIVATE ${PROJECT_NAME}-static ${LINK_LIBS})
+target_link_libraries(${PROJECT_NAME}.tests PRIVATE ${PROJECT_NAME}-shared ${LINK_LIBS})
 target_link_libraries(${PROJECT_NAME}-shared PRIVATE ${LINK_LIBS})
 target_link_libraries(${PROJECT_NAME}-static PRIVATE ${LINK_LIBS})
-target_link_libraries(${PROJECT_NAME}-tests PRIVATE ${PROJECT_NAME}-shared ${LINK_LIBS})
 
 # Add project unit tests
 # add_custom_target("${PROJECT_NAME}-tests" SOURCE ${TESTS})

Doxyfile

@@ -499,13 +499,13 @@ NUM_PROC_THREADS       = 1
 # normally produced when WARNINGS is set to YES.
 # The default value is: NO.
 
-EXTRACT_ALL            = NO
+EXTRACT_ALL            = YES
 
 # If the EXTRACT_PRIVATE tag is set to YES, all private members of a class will
 # be included in the documentation.
 # The default value is: NO.
 
-EXTRACT_PRIVATE        = NO
+EXTRACT_PRIVATE        = YES
 
 # If the EXTRACT_PRIV_VIRTUAL tag is set to YES, documented private virtual
 # methods of a class will be included in the documentation.
@@ -1008,7 +1008,7 @@ FILE_PATTERNS          = *.c \
 # be searched for input files as well.
 # The default value is: NO.
 
-RECURSIVE              = NO
+RECURSIVE              = YES
 
 # The EXCLUDE tag can be used to specify files and/or directories that should be
 # excluded from the INPUT source files. This way you can easily exclude a
@@ -1017,14 +1017,14 @@ RECURSIVE              = NO
 # Note that relative paths are relative to the directory from which doxygen is
 # run.
 
-EXCLUDE                =
+EXCLUDE                = bin build docs examples modules tests
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded
 # from the input.
 # The default value is: NO.
 
-EXCLUDE_SYMLINKS       = NO
+EXCLUDE_SYMLINKS       = YES
 
 # If the value of the INPUT tag contains directories, you can use the
 # EXCLUDE_PATTERNS tag to specify one or more wildcard patterns to exclude
@@ -1153,7 +1153,7 @@ FORTRAN_COMMENT_AFTER  = 72
 # also VERBATIM_HEADERS is set to NO.
 # The default value is: NO.
 
-SOURCE_BROWSER         = NO
+SOURCE_BROWSER         = YES
 
 # Setting the INLINE_SOURCES tag to YES will include the body of functions,
 # classes and enums directly into the documentation.

bin/compile.sh

@@ -1,11 +1,38 @@
 #!/bin/sh
 
+script_dir=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+exe=gdpm
+static=gdpm.static
+tests=gdpm.tests
+
+function test_link(){
+	path=$1
+	link=$2
+	if test -f "$path"
+	then
+		echo "Creating link from '$path' to '$link')"
+		if test -f "$link"
+		then
+			rm $link
+		fi
+		ln -s $path $link
+	fi
+}
+
+function test_strip(){
+	path=$1
+	if test -f "$path" 
+	then
+		echo "Stripping debug symbols from '$path'" 
+		strip "$path"
+	fi
+}
+
 # Run this script at project root
 #meson configure build
 #CXX=clang++ meson compile -C build -j$(proc)
 
 
-
 # CMake/ninja build system
 mkdir -p build
 cmake -B build -S . -D CMAKE_EXPORT_COMPILE_COMMANDS=1 -D CMAKE_BUILD_TYPE=Debug -G Ninja
@@ -13,12 +40,17 @@ ninja -C build -j $(nproc)
 
 
 # Create symlinks to executables in build folder if necessary
-if test -f "../build/gdpm"; then
+test_link $script_dir/../build/gdpm $script_dir/../bin/$exe
-	rm bin/gdpm
+test_link $script_dir/../build/gdpm.static $script_dir/../bin/$static
-	ln -s ../build/gdpm bin/gdpm
+test_link $script_dir/../build/gdpm.tests $script_dir/../bin/$tests
-fi
 
-if test -f "../build/gdpm-tests"; then
+
-	rm bin/gdpm-tests
+# Strip debug symbols
-	ln -s ../build/gdpm-tests bin/gdpm-tests
+test_strip ${script_dir}/../build/gdpm
-fi
+test_strip ${script_dir}/../build/gdpm.static
+test_strip ${script_dir}/../build/gdpm.tests
+
+
+# Generate documentation using `doxygen`
+cd ${script_dir}/..
+doxygen

bin/lines.sh

@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 
 # Call this from project root
-wc -l include/*.hpp src/*.cpp 
+grep -v ^S include/*.hpp src/*.cpp | wc -l include/*.hpp src/*.cpp 

include/cache.hpp

@@ -2,27 +2,31 @@
 #pragma once
 
 #include "constants.hpp"
+#include "package.hpp"
+#include "error.hpp"
+#include "result.hpp"
 #include <sqlite3.h>
 #include <vector>
 #include <string>
 
-namespace gdpm::package_manager{
-	struct package_info;
-}
 
-namespace gdpm::cache{
+namespace gdpm::cache {
-	using namespace package_manager;
+	struct params {
-	int create_package_database(const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
+		std::string cache_path	= GDPM_PACKAGE_CACHE_PATH;
-	int insert_package_info(const std::vector<package_info>& package, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
+		std::string table_name	= GDPM_PACKAGE_CACHE_TABLENAME;
-	std::vector<package_info> get_package_info_by_id(const std::vector<size_t>& package_ids, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
+	};
-	std::vector<package_info> get_package_info_by_title(const std::vector<std::string>& package_titles, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	std::vector<package_info> get_installed_packages(const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	int update_package_info(const std::vector<package_info>& packages, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	int update_sync_info(const std::vector<std::string>& download_urls, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	int delete_packages(const std::vector<std::string>& package_titles, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	int delete_packages(const std::vector<size_t>& package_ids, const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
-	int drop_package_database(const std::string& cache_path = GDPM_PACKAGE_CACHE_PATH, const std::string& table_name = GDPM_PACKAGE_CACHE_TABLENAME);
 
-	std::string to_values(const package_info& package);
+	error create_package_database(bool overwrite = false, const params& = params());
-	std::string to_values(const std::vector<package_info>& packages);
+	error insert_package_info(const package::info_list& packages, const params& = params());
+	result_t<package::info_list> get_package_info_by_id(const package::id_list& package_ids, const params& = params());
+	result_t<package::info_list> get_package_info_by_title(const package::title_list& package_titles, const params& params = cache::params());
+	result_t<package::info_list> get_installed_packages(const params& = params());
+	error update_package_info(const package::info_list& packages, const params& = params());
+	error update_sync_info(const std::vector<std::string>& download_urls, const params& = params());
+	error delete_packages(const package::title_list& package_titles, const params& = params());
+	error delete_packages(const package::id_list& package_ids, const params& = params());
+	error drop_package_database(const params& = params());
+
+	result_t<std::string> to_values(const package::info& package);
+	result_t<std::string> to_values(const package::info_list& packages);
 }

include/config.hpp

@@ -3,32 +3,33 @@
 #include "constants.hpp"
 #include "error.hpp"
 
+#include <rapidjson/document.h>
 #include <string>
 #include <filesystem>
 #include <vector>
-#include <set>
+#include <unordered_map>
-
 
 namespace gdpm::config{
 	struct context{
-		std::string username;
+		string username;
-		std::string password;
+		string password;
-		std::string path;
+		string path;
-		std::string token;
+		string token;
-		std::string godot_version;
+		string godot_version;
-		std::string packages_dir;
+		string packages_dir;
-		std::string tmp_dir;
+		string tmp_dir;
-		std::set<std::string> remote_sources;
+		string_map remote_sources;
 		size_t threads;
 		size_t timeout;
 		bool enable_sync;
 		bool enable_file_logging;
 		int verbose;
 	};
-	std::string to_json(const context& params);
+	string to_json(const context& params);
-	gdpm::error load(std::filesystem::path path, context& config, int verbose = 0);
+	error load(std::filesystem::path path, context& config, int verbose = 0);
-	gdpm::error save(std::filesystem::path path, const context& config, int verbose = 0);
+	error save(std::filesystem::path path, const context& config, int verbose = 0);
-	context make_context(const std::string& username = GDPM_CONFIG_USERNAME, const std::string& password = GDPM_CONFIG_PASSWORD, const std::string& path = GDPM_CONFIG_PATH, const std::string& token = GDPM_CONFIG_TOKEN, const std::string& godot_version = GDPM_CONFIG_GODOT_VERSION, const std::string& packages_dir = GDPM_CONFIG_LOCAL_PACKAGES_DIR, const std::string& tmp_dir = GDPM_CONFIG_LOCAL_TMP_DIR, const std::set<std::string>& remote_sources = {GDPM_CONFIG_REMOTE_SOURCES}, size_t threads = GDPM_CONFIG_THREADS, size_t timeout = 0, bool enable_sync = GDPM_CONFIG_ENABLE_SYNC, bool enable_file_logging = GDPM_CONFIG_ENABLE_FILE_LOGGING, int verbose = GDPM_CONFIG_VERBOSE);
+	context make_context(const std::string& username = GDPM_CONFIG_USERNAME, const string& password = GDPM_CONFIG_PASSWORD, const string& path = GDPM_CONFIG_PATH, const string& token = GDPM_CONFIG_TOKEN, const string& godot_version = GDPM_CONFIG_GODOT_VERSION, const string& packages_dir = GDPM_CONFIG_LOCAL_PACKAGES_DIR, const string& tmp_dir = GDPM_CONFIG_LOCAL_TMP_DIR, const string_map& remote_sources = {GDPM_CONFIG_REMOTE_SOURCES}, size_t threads = GDPM_CONFIG_THREADS, size_t timeout = 0, bool enable_sync = GDPM_CONFIG_ENABLE_SYNC, bool enable_file_logging = GDPM_CONFIG_ENABLE_FILE_LOGGING, int verbose = GDPM_CONFIG_VERBOSE);
+	error validate(const rapidjson::Document& doc);
 
 	extern context config;
 }

include/constants.hpp

@@ -5,6 +5,7 @@
 #include <string_view>
 
 namespace gdpm::constants{
+	const std::string RemoteName(std::string("origin"));
 	const std::string HomePath(std::string(std::getenv("HOME")) + "/");
 	const std::string TestPath(HomePath + ".config/gdpm/tests");
 	const std::string ConfigPath(HomePath + ".config/gdpm/config.json");
@@ -24,7 +25,7 @@ namespace gdpm::constants{
 #define GDPM_CONFIG_GODOT_VERSION "3.4"
 #define GDPM_CONFIG_LOCAL_PACKAGES_DIR gdpm::constants::LocalPackagesDir
 #define GDPM_CONFIG_LOCAL_TMP_DIR gdpm::constants::TemporaryPath
-#define GDPM_CONFIG_REMOTE_SOURCES constants::HostUrl 
+#define GDPM_CONFIG_REMOTE_SOURCES std::pair<std::string, std::string>(constants::RemoteName, constants::HostUrl)
 #define GDPM_CONFIG_THREADS 1
 #define GDPM_CONFIG_TIMEOUT_MS 30000
 #define GDPM_CONFIG_ENABLE_SYNC 1

include/error.hpp

@@ -1,43 +1,90 @@
+#pragma once
 
-#include <fmt/core.h>
-#include <string>
 #include "log.hpp"
+#include "types.hpp"
+#include <fmt/core.h>
+#include <new>
+#include <string>
+#include <functional>
+
+namespace gdpm::constants::error{
 
-namespace gdpm::error_codes{
 	enum {
 		NONE = 0,
-		UNKNOWN				= 1,
+		UNKNOWN,
-		NOT_FOUND			= 2,
+		UNKNOWN_COMMAND,
-		FILE_EXISTS 		= 3,
+		NOT_FOUND,
-		HOST_UNREACHABLE 	= 4,
+		NOT_DEFINED,
+		NOT_IMPLEMENTED,
+		NO_PACKAGE_FOUND,
+		PATH_NOT_DEFINED,
+		FILE_EXISTS,
+		FILE_NOT_FOUND,
+		DIRECTORY_EXISTS,
+		DIRECTORY_NOT_FOULD,
+		HOST_UNREACHABLE,
+		EMPTY_RESPONSE,
+		INVALID_ARGS,
+		INVALID_CONFIG,
+		INVALID_KEY,
+		HTTP_RESPONSE_ERROR,
+		STD_ERROR
 	};
 
-	inline std::string to_string(int error_code) {
+	const string_list messages {
-		return "";
+		"",
+		"An unknown error has occurred.",
+		"Unknown command.",
+		"Resource not found.",
+		"Function not defined.",
+		"Function not implemented.",
+		"No package found.",
+		"Path is not well-defined",
+		"File found.",
+		"File does not exist.",
+		"Directory exists.",
+		"Directory not found.",
+		"No response from host. Host is unreacheable",
+		"Empty response from host.",
+		"Invalid arguments.",
+		"Invalid configuration.",
+		"Invalid key.",
+		"An HTTP response error has occurred.",
+		"An error has occurred."
+	};
+
+
+	inline string get_message(int error_code) {
+		string message{};
+		try{ message = messages[error_code]; }
+		catch(const std::bad_alloc& e){
+			log::error("No default message for error code.");
+		}
+		return message;
 	}
 }; 
 
 namespace gdpm{
 	class error {
 	public:
-		error(int code = 0, const std::string& message = "", bool print_message = false):
+		constexpr explicit error(int code = 0, const string& message = "{code}"):
-			m_code(code), m_message(message)
+			m_code(code), m_message(message == "{code}" ? constants::error::get_message(code): message)
-		{
+		{}
-			if(print_message)
-				print();
-		}
 
 		void set_code(int code) { m_code = code; }
-		void set_message(const std::string& message) { m_message = message; }
+		void set_message(const string& message) { m_message = message; }
 
 		int get_code() const { return m_code; }
-		std::string get_message() const { return m_message; }
+		string get_message() const { return m_message; }
-		bool has_error() const { return m_code != 0; }
+		bool has_occurred() const { return m_code != 0; }
-		void print(){ log::println(GDPM_COLOR_LOG_ERROR "ERROR: {}" GDPM_COLOR_LOG_RESET, m_message); }
+
+		bool operator()(){
+			return has_occurred();
+		}
 	
 	private:
 		int m_code;
-		std::string m_message;
+		string m_message;
 	};
 
 	// Add logging function that can handle error objects

include/http.hpp

@@ -1,18 +1,31 @@
 #pragma once
 
 #include "constants.hpp"
-
+#include "types.hpp"
 #include <unordered_map>
 
 namespace gdpm::http{
+	using headers_t = std::unordered_map<string, string>;
+	enum response_code{
+		OK 			= 200,
+		NOT_FOUND 	= 400
+	};
 	struct response{
 		long code = 0;
-		std::string body{};
+		string body{};
-		std::unordered_map<std::string, std::string> headers{};
+		headers_t headers{};
+		error error();
 	};
 
-	response request_get(const std::string& url, size_t timeout = GDPM_CONFIG_TIMEOUT_MS, int verbose = 0);
+
-	response request_post(const std::string& url, const char *post_fields="", size_t timeout = GDPM_CONFIG_TIMEOUT_MS, int verbose = 0);
+	struct params {
-	response download_file(const std::string& url, const std::string& storage_path, size_t timeout = GDPM_CONFIG_TIMEOUT_MS, int verbose = 0);
+		size_t timeout = GDPM_CONFIG_TIMEOUT_MS;
+		int verbose = 0;
+	};
+
+	string url_escape(const string& url);
+	response request_get(const string& url, const http::params& params = http::params());
+	response request_post(const string& url, const char *post_fields="", const http::params& params = http::params());
+	response download_file(const string& url, const string& storage_path, const http::params& params = http::params());
 	
 }

include/log.hpp

@@ -3,14 +3,14 @@
 
 #include "utils.hpp"
 #include "colors.hpp"
-#include <fmt/core.h>
+// #include <fmt/core.h>
 
 #if __cplusplus > 201703L
 	// #include <format>
 #else
 #endif
-#include <fmt/printf.h>
+// #include <fmt/printf.h>
-#include <fmt/format.h>
+// #include <fmt/format.h>
 
 /*
 TODO: Allow setting the logging *prefix*

include/package.hpp

@@ -0,0 +1,113 @@
+#pragma once
+
+#include "constants.hpp"
+#include "error.hpp"
+#include "package.hpp"
+#include "types.hpp"
+#include "result.hpp"
+#include "config.hpp"
+#include <cstdio>
+#include <filesystem>
+#include <string>
+#include <vector>
+#include <rapidjson/document.h>
+
+
+namespace gdpm::package {
+
+	struct info {
+		size_t asset_id;
+		string type;
+		string title;
+		string author;
+		size_t author_id;
+		string version;
+		string godot_version;
+		string cost;
+		string description;
+		string modify_date;
+		string support_level;
+		string category;
+		string remote_source;
+		string download_url;
+		string download_hash;
+		bool is_installed;
+		string install_path;
+		std::vector<info> dependencies;
+	};
+
+	struct params {
+		enum install_method_e{
+			GLOBAL_LINK_LOCAL,
+			GLOBAL_CLONE_LOCAL,
+			GLOBAL_ONLY,
+			LOCAL_ONLY
+		};
+		bool parallel_jobs 				= 1;
+		bool use_cache 					= true;
+		bool use_remote					= true;
+		bool skip_prompt				= false;
+		std::string remote_source		= "";
+		install_method_e install_method = GLOBAL_LINK_LOCAL;
+	};
+
+	using info_list 	= std::vector<info>;
+	using title_list 	= std::vector<string>;
+	using id_list 		= std::vector<size_t>;
+	using path 			= std::string;
+	using path_list		= std::vector<path>;
+
+	/*! 
+	@brief Install a Godot package from the Asset Library in the current project.
+	By default, packages are stored in a global directory and linked to the project
+	where the tool is executed. Use the `--jobs` option to install packages in 
+	parallel. Specify which remote source to use by passing the `--remote` option.
+	By default, the first remote source will by used. Alternatively, if the
+	`--use-remote=false` option is passed, then the tool will only attempt to fetch the
+	package from cache. Use the `--use-cache=false` option to fetch package only from 
+	remote source.
+
+	`gdpm install "super cool example package"
+		
+	To only install a package global without linking to the project, use the 
+	`--global-only` option.
+
+	`gdpm install --global-only "super cool example package"
+
+	To install a package to a local project only, use the `--local-only` option. 
+	This will extract the package contents to the project location instead of the
+	global install location. Use the `--path` option to specify an alternative
+	path.
+
+	`gdpm install --local-only "super cool example package" --path addons/example
+
+	To copy the package to a project instead of linking, use the `--clone` option.
+
+	`gdpm install --clone "super cool examle package"
+
+	*/
+	GDPM_DLL_EXPORT error install(const config::context& config, const title_list& package_titles, const params& params = package::params());
+	
+	/*!
+	@brief Remove's package and contents from local database.
+	*/
+	GDPM_DLL_EXPORT error remove(const config::context& config, const title_list& package_titles, const params& params = package::params());
+	GDPM_DLL_EXPORT error remove_all(const config::context& config, const params& params = package::params());
+	GDPM_DLL_EXPORT error update(const config::context& config, const title_list& package_titles, const params& params = package::params());
+	GDPM_DLL_EXPORT error search(const config::context& config, const title_list& package_titles, const params& params = package::params());
+	GDPM_DLL_EXPORT error list(const config::context& config, const args_t& args, const opts_t& opts);
+	GDPM_DLL_EXPORT error export_to(const path_list& paths);
+	GDPM_DLL_EXPORT error link(const config::context& config, const title_list& package_titles, const opts_t& opts);
+	GDPM_DLL_EXPORT error clone(const config::context& config, const title_list& package_titles, const opts_t& opts);
+
+
+	GDPM_DLL_EXPORT void print_list(const rapidjson::Document& json);
+	GDPM_DLL_EXPORT void print_list(const info_list& packages);
+	GDPM_DLL_EXPORT result_t<info_list> get_package_info(const opts_t& opts);
+	GDPM_DLL_EXPORT result_t<title_list> get_package_titles(const info_list& packages);
+	GDPM_DLL_EXPORT void clean_temporary(const config::context& config, const title_list& package_titles);
+
+	/* Dependency Management API */
+	GDPM_DLL_EXPORT result_t<info_list> synchronize_database(const config::context& config, const title_list& package_titles);
+	GDPM_DLL_EXPORT result_t<info_list> resolve_dependencies(const config::context& config, const title_list& package_titles);
+}

include/package_manager.hpp

@@ -1,7 +1,10 @@
 #pragma once
 
 #include "config.hpp"
+#include "package.hpp"
 #include "package_manager.hpp"
+#include "remote.hpp"
+#include "result.hpp"
 #include <cstdio>
 #include <cxxopts.hpp>
 #include <memory>
@@ -12,39 +15,23 @@
 #include <rapidjson/document.h>
 #include <curl/curl.h>
 
-namespace gdpm::package_manager{
+namespace gdpm::package_manager {
-	extern std::vector<std::string> repo_sources;
+	extern remote::repository_map repo_sources;
 	extern CURL *curl;
 	extern CURLcode res;
 	extern config::context config;	
 
-	struct package_info{
-		size_t asset_id;
-		std::string type;
-		std::string title;
-		std::string author;
-		size_t author_id;
-		std::string version;
-		std::string godot_version;
-		std::string cost;
-		std::string description;
-		std::string modify_date;
-		std::string support_level;
-		std::string category;
-		std::string remote_source;
-		std::string download_url;
-		std::string download_hash;
-		bool is_installed;
-		std::string install_path;
-		std::vector<package_info> dependencies;
-	};
-
 	struct cxxargs{
 		cxxopts::ParseResult result;
 		cxxopts::Options options;
 	};
 
-	enum command_e{ 
+	struct exec_args{
+		args_t args;
+		opts_t opts;
+	};
+
+	enum class action_e{ 
 		install, 
 		remove, 
 		update, 
@@ -60,45 +47,12 @@ namespace gdpm::package_manager{
 		none 
 	};
 
-	using package_list 		= std::vector<package_info>;
+GDPM_DLL_EXPORT result_t<exec_args> initialize(int argc, char **argv);
-	using package_titles 	= std::vector<std::string>;
+	GDPM_DLL_EXPORT int execute(const args_t& args, const opts_t& opts);
-	using cl_arg 			= std::variant<int, bool, float, std::string>;
-	using cl_args			= std::vector<cl_arg>;
-	using cl_opts			= std::unordered_map<std::string, cl_args>;
-
-	GDPM_DLL_EXPORT int initialize(int argc, char **argv);
-	GDPM_DLL_EXPORT int execute();
 	GDPM_DLL_EXPORT void finalize();
 
-	/* Package management API */
-	GDPM_DLL_EXPORT error install_packages(const std::vector<std::string>& package_titles, bool skip_prompt = false);
-	GDPM_DLL_EXPORT error remove_packages(const std::vector<std::string>& package_titles, bool skip_prompt = false);
-	GDPM_DLL_EXPORT error remove_all_packages();
-	GDPM_DLL_EXPORT error update_packages(const std::vector<std::string>& package_titles, bool skip_prompt = false);
-	GDPM_DLL_EXPORT error search_for_packages(const std::vector<std::string>& package_titles, bool skip_prompt = false);
-	GDPM_DLL_EXPORT error export_packages(const std::vector<std::string>& paths);
-	GDPM_DLL_EXPORT std::vector<std::string> list_information(const std::vector<std::string>& opts, bool print_list = true);
-	GDPM_DLL_EXPORT void clean_temporary(const std::vector<std::string>& package_titles);
-	GDPM_DLL_EXPORT void link_packages(const std::vector<std::string>& package_titles, const std::vector<std::string>& paths);
-	GDPM_DLL_EXPORT void clone_packages(const std::vector<std::string>& package_titles, const std::vector<std::string>& paths);
-	
-	/* Remote API */
-	GDPM_DLL_EXPORT error _handle_remote(const std::vector<std::string>& args, const std::vector<std::string>& opts);
-	GDPM_DLL_EXPORT void remote_add_repository(const std::vector<std::string>& repositories);
-	GDPM_DLL_EXPORT void remote_remove_respository(const std::vector<std::string>& repositories);
-	GDPM_DLL_EXPORT void remote_remove_respository(ssize_t index);
-	GDPM_DLL_EXPORT void remote_move_repository(int old_position, int new_position);
-
 	/* Auxiliary Functions */
 	GDPM_DLL_EXPORT cxxargs _parse_arguments(int argc, char **argv);
-	GDPM_DLL_EXPORT void _handle_arguments(const cxxargs& args);
+	GDPM_DLL_EXPORT result_t<exec_args> _handle_arguments(const cxxargs& args);
-	GDPM_DLL_EXPORT void run_command(command_e command, const std::vector<std::string>& package_titles, const std::vector<std::string>& opts);
+	GDPM_DLL_EXPORT void run_command(action_e command, const package::title_list& package_titles, const opts_t& opts);
-	GDPM_DLL_EXPORT void print_package_list(const rapidjson::Document& json);
-	GDPM_DLL_EXPORT void print_package_list(const std::vector<package_info>& packages);
-	GDPM_DLL_EXPORT void print_remote_sources();
-	GDPM_DLL_EXPORT std::vector<std::string> get_package_titles(const std::vector<package_info>& packages);
-
-	/* Dependency Management API */
-	GDPM_DLL_EXPORT std::vector<package_info> synchronize_database(const std::vector<std::string>& package_titles);
-	GDPM_DLL_EXPORT std::vector<std::string> resolve_dependencies(const std::vector<std::string>& package_titles);
 }

include/plugin.hpp

@@ -2,7 +2,7 @@
 
 #include <string>
 
-namespace towk::plugin{
+namespace gdpm::plugin{
 	struct info{
 		std::string name;
 		std::string description;

include/remote.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "constants.hpp"
+#include "error.hpp"
+#include "types.hpp"
+#include <fmt/core.h>
+#include <unordered_map>
+#include "config.hpp"
+
+namespace gdpm::remote{
+	using repo_names 		= string_list;
+	using repo_urls 		= string_list;
+	using repository_map 	= string_map;
+
+	GDPM_DLL_EXPORT error _handle_remote(config::context& config, const args_t& args, const opts_t& opts);
+	GDPM_DLL_EXPORT void set_repositories(config::context& context, const repository_map& repos);
+	GDPM_DLL_EXPORT void add_repositories(config::context& context, const repository_map& repos);
+	GDPM_DLL_EXPORT void remove_respositories(config::context& context, const repo_names& name);
+	GDPM_DLL_EXPORT void move_repository(config::context& context, int old_position, int new_position);
+	GDPM_DLL_EXPORT void print_repositories(const config::context& context);
+}

include/rest_api.hpp

@@ -1,5 +1,6 @@
 
 #include "constants.hpp"
+#include "config.hpp"
 #include <rapidjson/document.h>
 #include <rapidjson/writer.h>
 #include <rapidjson/stringbuffer.h>
@@ -47,6 +48,7 @@ namespace gdpm::rest_api{
 		int verbose;
 	};
 
+	context make_from_config(const config::context& config);
 	context make_context(type_e type = GDPM_DEFAULT_ASSET_TYPE, int category = GDPM_DEFAULT_ASSET_CATEGORY, support_e support = GDPM_DEFAULT_ASSET_SUPPORT, const std::string& filter = GDPM_DEFAULT_ASSET_FILTER, const std::string& user = GDPM_DEFAULT_ASSET_USER, const std::string& godot_version = GDPM_DEFAULT_ASSET_GODOT_VERSION, int max_results = GDPM_DEFAULT_ASSET_MAX_RESULTS, int page = GDPM_DEFAULT_ASSET_PAGE, sort_e sort = GDPM_DEFAULT_ASSET_SORT, bool reverse = GDPM_DEFAULT_ASSET_REVERSE, int verbose = GDPM_DEFAULT_ASSET_VERBOSE);
 
 	std::string to_string(type_e type);

include/result.hpp

@@ -0,0 +1,73 @@
+#pragma once
+
+#include "log.hpp"
+#include "error.hpp"
+#include "types.hpp"
+#include <functional>
+#include <type_traits>
+
+namespace gdpm{
+	
+	template <class T, error_t U = error>
+	class result_t {
+	public:
+		result_t() = delete;
+		result_t(
+			std::tuple<T, U> tuple, 
+			std::function<T()> ok = []() -> T{}, 
+			std::function<void()> error = [](){}
+		): data(tuple), fn_ok(ok), fn_error(error)
+		{ }
+
+		result_t(
+			T target,
+			U error,
+			std::function<std::unique_ptr<T>()> _fn_ok = []() -> std::unique_ptr<T>{ return nullptr; },
+			std::function<void()> _fn_error = [](){}
+		): data(std::make_tuple(target, error)), fn_ok(_fn_ok), fn_error(_fn_error)
+		{}
+
+		void define(
+			std::function<T()> ok,
+			std::function<U()> error
+		){
+			fn_ok = ok;
+			fn_error = error;
+		}
+
+		constexpr std::unique_ptr<T> unwrap() const { 
+			/* First, check if ok() and error() are defined. */
+			if(!fn_error || !fn_ok){
+				error error(
+					constants::error::NOT_DEFINED
+				);
+				log::error(error);
+				return nullptr;
+			}
+			/* Then, attempt unwrap the data. */
+			U err = std::get<U>(data);
+			if (err.has_occurred())
+				if(fn_error){
+					fn_error();
+					return nullptr;
+				}
+			return fn_ok(); 
+		}
+
+		constexpr T unwrap_or(T default_value) const {
+			U err = std::get<U>(data);
+			if(err.has_occurred())
+				return default_value;
+			return fn_ok();
+		}
+
+		constexpr T unwrap_unsafe() const {
+			return std::get<T>(data);
+		}
+
+	private:
+		std::tuple<T, U> data;
+		std::function<std::unique_ptr<T>()> fn_ok;
+		std::function<void()> fn_error;
+	};
+}

include/types.hpp

@@ -1,6 +1,14 @@
 #pragma once
 
+#include <tuple>
+#include <functional>
+#include <type_traits>
+#include <string>
+#include <variant>
+
 namespace gdpm{
+	class error;
+
 	/*
 	Base class to prevent derived class from creating copies.
 	*/
@@ -20,4 +28,20 @@ namespace gdpm{
 		non_movable(const non_movable&) = delete;
 		non_movable(non_movable&&) = delete;
 	};
+
+	template <typename T>
+	concept error_t = requires{ std::is_same<error, T>::value; };
+
+	using string 		= std::string;
+	using string_list 	= std::vector<string>;
+	using string_map 	= std::unordered_map<string, string>;
+	using string_pair 	= std::pair<string, string>;
+	using var 			= std::variant<int, bool, float, std::string>;
+	template <typename T = var> 
+	using _args_t 		= std::vector<T>;
+	using args_t 		= _args_t<string>;
+	template <typename Key = std::string, class Value = _args_t<var>> 
+	using _opts_t 		= std::unordered_map<Key, Value>;
+	using opts_t 		= _opts_t<string, string_list>;
+
 }

include/utils.hpp

@@ -102,21 +102,6 @@ namespace gdpm::utils{
 	std::string prompt_user(const char *message);
 	bool prompt_user_yn(const char *message);
 	void delay(std::chrono::milliseconds milliseconds = GDPM_REQUEST_DELAY);
+	std::string join(const std::vector<std::string>& target, const std::string& delimiter = ", ");
 	// TODO: Add function to get size of decompressed zip
 }
-
-namespace gdpm{
-	class non_copyable{
-	public:
-		non_copyable(){}
-	
-	private:
-		non_copyable(const non_copyable&);
-		non_copyable& operator=(const non_copyable&);
-	};
-
-	class non_movable{
-		non_movable(const non_movable&) = delete;
-		non_movable(non_movable&&) = delete;
-	};
-}

src/cache.cpp

@@ -2,35 +2,44 @@
 #include "cache.hpp"
 #include "log.hpp"
 #include "constants.hpp"
-#include "package_manager.hpp"
+#include "package.hpp"
 #include "utils.hpp"
+#include "result.hpp"
 #include <filesystem>
 #include <string>
+#include <format>
+#include <tuple>
 
 
 namespace gdpm::cache{
-	int create_package_database(const std::string& cache_path, const std::string& table_name){
+	error create_package_database(bool overwrite, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg;
 
 		/* Check and make sure directory is created before attempting to open */
 		namespace fs = std::filesystem;
-		fs::path dir_path = fs::path(cache_path).parent_path();
+		fs::path dir_path = fs::path(params.cache_path).parent_path();
 		if(!fs::exists(dir_path)){
-			log::info("Creating cache directories...{}", cache_path);
+			log::info("Creating cache directories...{}", params.cache_path);
 			fs::create_directories(dir_path);
 		}
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("create_package_database.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc,
+				std::format(
+					"create_package_database.sqlite3_open(): {}",
+					sqlite3_errmsg(db)
+				)
+			);
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 
-		std::string sql = "CREATE TABLE IF NOT EXISTS " +
+		string sql = "CREATE TABLE IF NOT EXISTS " +
-							table_name + "("
+							params.table_name + "("
 							"id INTEGER PRIMARY KEY AUTOINCREMENT,"
 							"asset_id		INT		NOT NULL,"
 							"type			INT		NOT NULL,"
@@ -54,60 +63,71 @@ namespace gdpm::cache{
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
 			// log::error("Failed to fetch data: {}\n", sqlite3_errmsg(db));
-			log::error("create_package_database.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"create_package_database.sqlite3_exec(): {}", 
+				errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		sqlite3_close(db);
-		return 0;
+		return error();
 	}
 
 
-	int insert_package_info(const std::vector<package_info>& packages, const std::string& cache_path, const std::string& table_name){
+	error insert_package_info(const package::info_list& packages, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
 
 		/* Prepare values to use in sql statement */
-		std::string sql{"BEGIN TRANSACTION; "};
+		string sql{"BEGIN TRANSACTION; "};
 		for(const auto& p : packages){
-			sql += "INSERT INTO " + table_name + " (" GDPM_PACKAGE_CACHE_COLNAMES ") ";
+			sql += "INSERT INTO " + params.table_name + " (" GDPM_PACKAGE_CACHE_COLNAMES ") ";
-			sql += "VALUES (" + to_values(p) + "); ";
+			sql += "VALUES (" + to_values(p).unwrap_unsafe() + "); ";
 		}
 		sql += "COMMIT;";
 		// log::println("{}", sql);
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("insert_package_info.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"insert_package_info.sqlite3_open(): {}", 
+				sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("insert_package_info.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+					"insert_package_info.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		sqlite3_close(db);
-		return 0;
+		return error();
 	}
 
 
-	std::vector<package_info> get_package_info_by_id(const std::vector<size_t>& package_ids, const std::string& cache_path, const std::string& table_name){
+	result_t<package::info_list> get_package_info_by_id(const package::id_list& package_ids, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
 		size_t p_size = 0;
-		std::vector<package_info> p_vector;
+		package::info_list p_vector;
-		std::string sql{"BEGIN TRANSACTION;\n"};
+		string sql{"BEGIN TRANSACTION;\n"};
 
 		auto callback = [](void *data, int argc, char **argv, char **colnames){
 			// log::error("{}", (const char*)data);
 			// p_data *_data = (p_data*)data;
-			std::vector<package_info> *_p_vector = (std::vector<package_info>*) data;
+			package::info_list *_p_vector = (package::info_list*) data;
-			package_info p{
+			package::info p{
 				.asset_id 			= std::stoul(argv[1]),
 				.type 				= argv[2],
 				.title 				= argv[3],
@@ -130,41 +150,47 @@ namespace gdpm::cache{
 			return 0;
 		};
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("get_package_info_by_id.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"get_package_info_by_id.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 		
 		for(const auto& p_id : package_ids){
-			sql += "SELECT * FROM " + table_name + " WHERE asset_id=" + fmt::to_string(p_id)+ ";\n";
+			sql += "SELECT * FROM " + params.table_name + " WHERE asset_id=" + std::to_string(p_id)+ ";\n";
 		}
 		sql += "COMMIT;\n";
 		rc = sqlite3_exec(db, sql.c_str(), callback, (void*)&p_vector, &errmsg);
 		if(rc != SQLITE_OK){
+			error error(rc, std::format(
+				"get_package_info_by_id.sqlite3_exec(): {}", errmsg
+			));
 			log::error("get_package_info_by_id.sqlite3_exec(): {}", errmsg);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 		sqlite3_close(db);
-		return p_vector;
+		return result_t(p_vector, error());
 	}
 
 
-	std::vector<package_info> get_package_info_by_title(const std::vector<std::string>& package_titles, const std::string& cache_path, const std::string& table_name){
+	result_t<package::info_list> get_package_info_by_title(const package::title_list& package_titles, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
-		std::vector<package_info> p_vector;
+		package::info_list p_vector;
 
 		auto callback = [](void *data, int argc, char **argv, char **colnames){
 			if(argc <= 0)
 				return 1;
-			std::vector<package_info> *_p_vector = (std::vector<package_info>*)data;
+			package::info_list *_p_vector = (package::info_list*)data;
 			// log::println("get_package_info_by_title.callback.argv: \n\t{}\n\t{}\n\t{}\n\t{}\n\t{}", argv[0], argv[1], argv[2],argv[3], argv[4]);
-			package_info p{
+			package::info p{
 				.asset_id 			= std::stoul(argv[1]),
 				.type 				= argv[2],
 				.title 				= argv[3],
@@ -188,44 +214,50 @@ namespace gdpm::cache{
 		};
 
 		/* Check to make sure the directory is there before attempting to open */
-		if(!std::filesystem::exists(cache_path))
+		if(!std::filesystem::exists(params.cache_path))
-			std::filesystem::create_directories(cache_path);
+			std::filesystem::create_directories(params.cache_path);
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("get_package_info_by_title.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"get_package_info_by_title.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 
-		std::string sql{"BEGIN TRANSACTION;"};
+		string sql{"BEGIN TRANSACTION;"};
 		for(const auto& p_title : package_titles){
-			sql += "SELECT * FROM " + table_name + " WHERE title='" + p_title + "';";
+			sql += "SELECT * FROM " + params.table_name + " WHERE title='" + p_title + "';";
 		}
 		sql += "COMMIT;";
 		// log::println(sql);
 		rc = sqlite3_exec(db, sql.c_str(), callback, (void*)&p_vector, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("get_package_info_by_title.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"get_package_info_by_title.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 		sqlite3_close(db);
-		return p_vector;
+		return result_t(p_vector, error());
 	}
 
 
-	std::vector<package_info> get_installed_packages(const std::string& cache_path, const std::string& table_name){
+	result_t<package::info_list> get_installed_packages(const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
-		std::vector<package_info> p_vector;
+		package::info_list p_vector;
-		std::string sql{"BEGIN TRANSACTION;"};
+		string sql{"BEGIN TRANSACTION;"};
 
 		auto callback = [](void *data, int argc, char **argv, char **colnames){
-			std::vector<package_info> *_p_vector = (std::vector<package_info>*) data;
+			package::info_list *_p_vector = (package::info_list*) data;
-			package_info p{
+			package::info p{
 				.asset_id 			= std::stoul(argv[1]),
 				.type 				= argv[2],
 				.title 				= argv[3],
@@ -248,46 +280,55 @@ namespace gdpm::cache{
 			return 0;
 		};
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("get_installed_packages.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"get_installed_packages.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 
-		sql += "SELECT * FROM " + table_name + " WHERE is_installed=1; COMMIT;";
+		sql += "SELECT * FROM " + params.table_name + " WHERE is_installed=1; COMMIT;";
 		rc = sqlite3_exec(db, sql.c_str(), callback, (void*)&p_vector, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("get_installed_packages.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"get_installed_packages.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return {};
+			return result_t(package::info_list(), error);
 		}
 		sqlite3_close(db);
-		return p_vector;
+		return result_t(p_vector, error());
 	}
 
 
-	int update_package_info(const std::vector<package_info>& packages, const std::string& cache_path, const std::string& table_name){
+	error update_package_info(const package::info_list& packages, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
 		
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("update_package_info.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"update_package_info.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		
-		std::string sql;
+		string sql;
 		for(const auto& p : packages){
-			sql += "UPDATE " + table_name + " SET "
+			sql += "UPDATE " + params.table_name + " SET "
-			" asset_id=" + fmt::to_string(p.asset_id) + ", "
+			" asset_id=" + std::to_string(p.asset_id) + ", "
 			" type='" + p.type + "', "
 			" title='" + p.title + "', "
 			" author='" + p.author + "', " + 
-			" author_id=" + fmt::to_string(p.author_id) + ", "
+			" author_id=" + std::to_string(p.author_id) + ", "
 			" version='" + p.version + "', " + 
 			" godot_version='" + p.godot_version + "', " +
 			" cost='" + p.cost + "', " +
@@ -298,115 +339,137 @@ namespace gdpm::cache{
 			" remote_source='" + p.remote_source + "', " +
 			" download_url='" + p.download_url + "', " + 
 			" download_hash='" + p.download_hash + "', " +
-			" is_installed=" + fmt::to_string(p.is_installed) + ", " 
+			" is_installed=" + std::to_string(p.is_installed) + ", " 
 			" install_path='" + p.install_path + "'"
 			// " dependencies='" + p.dependencies + "'"
-			" WHERE title='" + p.title + "' AND asset_id=" + fmt::to_string(p.asset_id)
+			" WHERE title='" + p.title + "' AND asset_id=" + std::to_string(p.asset_id)
 			+ ";\n";
 		}
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("update_package_info.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"update_package_info.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		sqlite3_close(db);
-		return 0;
+		return error();
 	}
 
 
-	int delete_packages(const std::vector<std::string>& package_titles, const std::string& cache_path, const std::string& table_name){
+	error delete_packages(const package::title_list& package_titles, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
-		std::string sql;
+		string sql;
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("delete_packages.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"delete_packages.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 
 		for(const auto& p_title : package_titles){
-			sql += "DELETE FROM " + table_name + " WHERE title='"
+			sql += "DELETE FROM " + params.table_name + " WHERE title='"
 			+ p_title + "';\n";
 		}
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("delete_packages.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"delete_packages.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		sqlite3_close(db);
-		return 0;
+		return error();
 	}
 
 
-	int delete_packages(const std::vector<size_t>& package_ids, const std::string& cache_path, const std::string& table_name){
+	error delete_packages(const package::id_list& package_ids, const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
-		std::string sql;
+		string sql;
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("delete_packages.sqlite3_open(): {}", errmsg);
+			error error(rc, std::format(
+				"delete_packages.sqlite3_open(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 
 		for(const auto& p_id : package_ids){
-			sql += "DELETE FROM " + table_name + " WHERE asset_id="
+			sql += "DELETE FROM " + params.table_name + " WHERE asset_id="
-			+ fmt::to_string(p_id) + ";\n";
+			+ std::to_string(p_id) + ";\n";
 		}
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("delete_packages.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"delete_packages.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		sqlite3_close(db);
-		return 0;
+		return error();
 	}
 
 
-	int drop_package_database(const std::string& cache_path, const std::string& table_name){
+	error drop_package_database(const params& params){
 		sqlite3 *db;
 		sqlite3_stmt *res;
 		char *errmsg = nullptr;
-		std::string sql{"DROP TABLE IF EXISTS " + table_name + ";\n"};
+		string sql{"DROP TABLE IF EXISTS " + params.table_name + ";\n"};
 
-		int rc = sqlite3_open(cache_path.c_str(), &db);
+		int rc = sqlite3_open(params.cache_path.c_str(), &db);
 		if(rc != SQLITE_OK){
-			log::error("drop_package_database.sqlite3_open(): {}", sqlite3_errmsg(db));
+			error error(rc, std::format(
+				"drop_package_database.sqlite3_open(): {}", sqlite3_errmsg(db)
+			));
+			log::error(error);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 		
 		rc = sqlite3_exec(db, sql.c_str(), nullptr, nullptr, &errmsg);
 		if(rc != SQLITE_OK){
-			log::error("drop_package_database.sqlite3_exec(): {}", errmsg);
+			error error(rc, std::format(
+				"drop_package_database.sqlite3_exec(): {}", errmsg
+			));
+			log::error(error);
 			sqlite3_free(errmsg);
 			sqlite3_close(db);
-			return rc;
+			return error;
 		}
 
-		return 0;
+		return error();
 	}
 
-	std::string to_values(const package_info& p){
-		std::string p_values{};
-		std::string p_title = p.title; /* need copy for utils::replace_all() */
 
-		p_values += fmt::to_string(p.asset_id) + ", ";
+	result_t<string> to_values(const package::info& p){
+		string p_values{};
+		string p_title = p.title; /* need copy for utils::replace_all() */
+
+		p_values += std::to_string(p.asset_id) + ", ";
 		p_values += "'" + p.type + "', ";
 		p_values += "'" + utils::replace_all(p_title, "'", "''") + "', ";
 		p_values += "'" + p.author + "', ";
-		p_values += fmt::to_string(p.author_id) + ", ";
+		p_values += std::to_string(p.author_id) + ", ";
 		p_values += "'" + p.version + "', ";
 		p_values += "'" + p.godot_version + "', ";
 		p_values += "'" + p.cost + "', ";
@@ -417,16 +480,17 @@ namespace gdpm::cache{
 		p_values += "'" + p.remote_source + "', ";
 		p_values += "'" + p.download_url + "', ";
 		p_values += "'" + p.download_hash + "', ";
-		p_values += fmt::to_string(p.is_installed) + ", ";
+		p_values += std::to_string(p.is_installed) + ", ";
 		p_values += "'" + p.install_path + "'";
-		return p_values;
+		return result_t(p_values, error());
 	}
 
-	std::string to_values(const std::vector<package_info>& packages){
+
-		std::string o;
+	result_t<string> to_values(const package::info_list& packages){
+		string o;
 		for(const auto& p : packages)
-			o += to_values(p);
+			o += to_values(p).unwrap_unsafe();
-		return o;
+		return result_t(o, error());
 	}
 
 }

src/config.cpp

@@ -1,7 +1,9 @@
 #include "config.hpp"
+#include "error.hpp"
 #include "log.hpp"
 #include "utils.hpp"
 #include "constants.hpp"
+#include "error.hpp"
 
 // RapidJSON
 #include <rapidjson/ostreamwrapper.h>
@@ -23,6 +25,8 @@
 #include <fstream>
 #include <ios>
 #include <memory>
+#include <set>
+#include <unordered_map>
 
 
 namespace gdpm::config{
@@ -38,8 +42,19 @@ namespace gdpm::config{
 			return o;
 		};
 
+		auto _build_json_object = [](const string_map& m){
+			string o{"{"};
+			std::for_each(m.begin(), m.end(), [&o](const string_pair& p){
+				o += std::format("\n\"{}\": \"{}\",", p.first, p.second);
+			});
+			if(o.back() == ',')
+				o.pop_back();
+			o += "}";
+			return o;
+		};
+
 		/* Build a JSON string to pass to document */
-		std::string json{
+		string json{
 			"{\"username\":\"" + params.username + "\","
 			+ "\"password\":\"" + params.password + "\","
 			+ "\"path\":\"" + params.path + "\","
@@ -47,7 +62,7 @@ namespace gdpm::config{
 			+ "\"godot_version\":\"" + params.godot_version + "\","
 			+ "\"packages_dir\":\"" + params.packages_dir + "\","
 			+ "\"tmp_dir\":\"" + params.tmp_dir + "\","
-			+ "\"remote_sources\":" + _build_json_array(params.remote_sources) + ","
+			+ "\"remote_sources\":" + _build_json_object(params.remote_sources) + ","
 			+ "\"threads\":" + fmt::to_string(params.threads) + ","
 			+ "\"timeout\":" + fmt::to_string(params.timeout) + ","
 			+ "\"enable_sync\":" + fmt::to_string(params.enable_sync) + ","
@@ -58,17 +73,19 @@ namespace gdpm::config{
 	}
 
 
-	gdpm::error load(std::filesystem::path path, context& config, int verbose){
+	error load(
+		std::filesystem::path path, 
+		context& config, 
+		int verbose
+	){
 		std::fstream file;
-		gdpm::error error;
 		file.open(path, std::ios::in);
 		if(!file){
-			if(verbose){
+			if(verbose)
 				log::info("No configuration file found. Creating a new one.");
 			config = make_context();
 			save(config.path, config, verbose);
-			}
+			return error();
-			return error;
 		}
 		else if(file.is_open()){
 			/* 
@@ -79,24 +96,30 @@ namespace gdpm::config{
 			using namespace rapidjson;
 			
 			/* Read JSON from config, parse, and check document. Must make sure that program does not crash here and use default config instead! */
-			std::string contents, line;
+			string contents, line;
 			while(std::getline(file, line))
 				contents += line + "\n";
 
 			if(verbose > 0)
-				log::info("Load config...\n{}", contents.c_str());
+				log::info("Loading configuration file...\n{}", contents.c_str());
 			
 			Document doc;
 			ParseErrorCode status = doc.Parse(contents.c_str()).GetParseError();
 
 			if(!doc.IsObject()){
-				log::error("Could not load config file.");
+				error error(
+					constants::error::FILE_NOT_FOUND,
+					"Could not load config file."
+				);
+				log::error(error);
 				return error;
 			}
 
-			assert(doc.IsObject());
+			error error = validate(doc);
-			assert(doc.HasMember("remote_sources"));
+			if(error()){
-			assert(doc["remote_sources"].IsArray());
+				log::error(error);
+				return error;
+			}
 
 			/* Make sure contents were read correctly. */
 			// if(!status){
@@ -105,16 +128,23 @@ namespace gdpm::config{
 			// 	return context();
 			// }
 
-			/* Must check if keys exists first, then populate _config_params. */
+			/* Must check if keys exists first, then populate `_config_params`. */
 			if(doc.HasMember("remote_sources")){
 				if(doc["remote_sources"].IsArray()){
 					const Value& srcs = doc["remote_sources"];
-					for(auto& src : srcs.GetArray()){
+					for(auto& src : srcs.GetObject()){
 						// config.remote_sources.push_back(src.GetString());
-						config.remote_sources.insert(src.GetString());
+						config.remote_sources.insert(
+							std::pair(src.name.GetString(), src.value.GetString())
+						);
 					}
-				} else{
+				} else {
-					log::error("Malformed sources found.");
+					gdpm::error error(
+						constants::error::INVALID_KEY,
+						"Could not read key `remote_sources`."
+					);
+					log::error(error);
+					return error;
 				}
 			}
 			auto _get_value_string = [](Document& doc, const char *property){
@@ -141,17 +171,21 @@ namespace gdpm::config{
 			config.enable_sync 			= _get_value_int(doc, "enable_sync");
 			config.enable_file_logging 	= _get_value_int(doc, "enable_file_logging");
 		}
-		return error;
+		return error();
 	}
 
 
-	gdpm::error save(std::filesystem::path path, const context& config, int verbose){
+	error save(
+		std::filesystem::path path, 
+		const context& config, 
+		int verbose
+	){
 		using namespace rapidjson;
 
 		/* Build a JSON string to pass to document */
-		std::string json = to_json(config);
+		string json = to_json(config);
 		if(verbose > 0)
-			log::info("Save config...\n{}", json.c_str());
+			log::info("Saving configuration file...\n{}", json.c_str());
 		
 		/* Dump JSON config to file */
 		Document doc;
@@ -166,14 +200,28 @@ namespace gdpm::config{
 	}
 
 
-	context make_context(const std::string& username, const std::string& password, const std::string& path, const std::string& token, const std::string& godot_version, const std::string& packages_dir, const std::string& tmp_dir, const std::set<std::string>& remote_sources, size_t threads, size_t timeout, bool enable_sync, bool enable_file_logging, int verbose){
+	context make_context(
+		const string& username, 
+		const string& password, 
+		const string& path, 
+		const string& token, 
+		const string& godot_version, 
+		const string& packages_dir, 
+		const string& tmp_dir, 
+		const string_map& remote_sources, 
+		size_t threads, 
+		size_t timeout, 
+		bool enable_sync, 
+		bool enable_file_logging, 
+		int verbose
+	){
 		context config {
 			.username = username,
 			.password = password,
 			.path = path,
 			.token = token,
 			.godot_version = godot_version,
-			.packages_dir = (packages_dir.empty()) ? std::string(getenv("HOME")) + ".gdpm" : packages_dir,
+			.packages_dir = (packages_dir.empty()) ? string(getenv("HOME")) + ".gdpm" : packages_dir,
 			.tmp_dir = tmp_dir,
 			.remote_sources = remote_sources,
 			.threads = threads,
@@ -185,4 +233,23 @@ namespace gdpm::config{
 		return config;
 	}
 
+
+	error validate(const rapidjson::Document& doc){
+		error error(constants::error::INVALID_CONFIG, "");
+		if(!doc.IsObject()){
+			error.set_message("Document is not a JSON object.");
+			return error;
+		}
+		if(!doc.HasMember("remote_sources")){
+			error.set_message("Could not find `remote_sources` in config.");
+			return error;
+		}
+		if(!doc["remote_sources"].IsObject()){
+			error.set_message("Key `remote_sources` is not a JSON object.");
+			return error;
+		}
+		error.set_code(constants::error::NONE);
+		return error;
+	}
+
 }

src/http.cpp

@@ -8,7 +8,20 @@
 
 
 namespace gdpm::http{
-	response request_get(const std::string& url, size_t timeout, int verbose){
+
+	string url_escape(const string &url){
+		CURL *curl = nullptr;
+		curl_global_init(CURL_GLOBAL_ALL);
+		char *escaped_url = curl_easy_escape(curl, url.c_str(), url.size());
+		std::string url_copy = escaped_url;
+		curl_global_cleanup();
+		return escaped_url;
+	}
+
+	response request_get(
+		const string& url, 
+		const http::params& params
+	){
 		CURL *curl = nullptr;
 		CURLcode res;
 		utils::memory_buffer buf = utils::make_buffer();
@@ -28,10 +41,10 @@ namespace gdpm::http{
 			curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&buf);
 			curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, utils::curl_write_to_buffer);
 			curl_easy_setopt(curl, CURLOPT_USERAGENT, constants::UserAgent.c_str());
-			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, timeout);
+			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, params.timeout);
 			res = curl_easy_perform(curl);
 			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &r.code);
-			if(res != CURLE_OK && verbose > 0)
+			if(res != CURLE_OK && params.verbose > 0)
 				log::error("_make_request.curl_easy_perform(): {}", curl_easy_strerror(res));
 			curl_easy_cleanup(curl);
 		}
@@ -42,7 +55,12 @@ namespace gdpm::http{
 		return r;
 	}
 
-	response request_post(const std::string& url, const char *post_fields, size_t timeout, int verbose){
+
+	response request_post(
+		const string& url, 
+		const char *post_fields, 
+		const http::params& params
+	){
 		CURL *curl = nullptr;
 		CURLcode res;
 		utils::memory_buffer buf = utils::make_buffer();
@@ -62,10 +80,10 @@ namespace gdpm::http{
 			curl_easy_setopt(curl, CURLOPT_WRITEDATA, (void*)&buf);
 			curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, utils::curl_write_to_buffer);
 			curl_easy_setopt(curl, CURLOPT_USERAGENT, constants::UserAgent.c_str());
-			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, timeout);
+			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, params.timeout);
 			res = curl_easy_perform(curl);
 			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &r.code);
-			if(res != CURLE_OK && verbose > 0)
+			if(res != CURLE_OK && params.verbose > 0)
 				log::error("_make_request.curl_easy_perform(): {}", curl_easy_strerror(res));
 			curl_easy_cleanup(curl);
 		}
@@ -76,7 +94,12 @@ namespace gdpm::http{
 		return r;
 	}
 
-	response download_file(const std::string& url, const std::string& storage_path, size_t timeout, int verbose){
+
+	response download_file(
+		const string& url, 
+		const string& storage_path, 
+		const http::params& params
+	){
 		CURL *curl = nullptr;
 		CURLcode res;
 		response r;
@@ -110,10 +133,10 @@ namespace gdpm::http{
 			curl_easy_setopt(curl, CURLOPT_WRITEDATA, fp);
 			curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, utils::curl_write_to_stream);
 			curl_easy_setopt(curl, CURLOPT_USERAGENT, constants::UserAgent.c_str());
-			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, timeout);
+			curl_easy_setopt(curl, CURLOPT_TIMEOUT_MS, params.timeout);
 			res = curl_easy_perform(curl);
 			curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &r.code);
-			if(res != CURLE_OK && verbose > 0){
+			if(res != CURLE_OK && params.verbose > 0){
 				log::error("download_file.curl_easy_perform() failed: {}", curl_easy_strerror(res));
 			}
 			fclose(fp);

src/main.cpp

@@ -4,11 +4,14 @@
 #include "log.hpp"
 #include "config.hpp"
 #include "package_manager.hpp"
+#include "result.hpp"
 
 
 int main(int argc, char **argv){
-	gdpm::package_manager::initialize(argc, argv);
+	using namespace gdpm;
-	gdpm::package_manager::execute();
+	result_t <package_manager::exec_args> r_input = package_manager::initialize(argc, argv);
-	gdpm::package_manager::finalize();	
+	package_manager::exec_args input = r_input.unwrap_unsafe();
+	package_manager::execute(input.args, input.opts);
+	package_manager::finalize();	
 	return 0;
 }

src/package.cpp

@@ -0,0 +1,763 @@
+
+#include "package.hpp"
+#include "error.hpp"
+#include "rest_api.hpp"
+#include "config.hpp"
+#include "cache.hpp"
+#include "http.hpp"
+#include "remote.hpp"
+#include <future>
+#include <rapidjson/ostreamwrapper.h>
+#include <rapidjson/prettywriter.h>
+
+namespace gdpm::package{
+	
+	error install(
+		const config::context& config,
+		const package::title_list& package_titles, 
+		const package::params& params
+	){
+		using namespace rapidjson;
+
+		/* TODO: Need a way to use remote sources from config until none left */
+
+		/* Check if the package data is already stored in cache. If it is, there 
+		is no need to do a lookup to synchronize the local database since we 
+		have all the information we need to fetch the asset data. */
+		result_t result = cache::get_package_info_by_title(package_titles);
+		package::info_list p_found = {};
+		package::info_list p_cache = result.unwrap_unsafe();
+
+		/* Synchronize database information and then try to get data again from
+		cache if possible. */
+		if(config.enable_sync){
+			if(p_cache.empty()){
+				result_t result = synchronize_database(config, package_titles);
+				p_cache = result.unwrap_unsafe();
+			}
+		}
+
+		for(const auto& p_title : package_titles){
+			auto found = std::find_if(
+				p_cache.begin(), 
+				p_cache.end(), 
+				[&p_title](const package::info& p){ 
+					return p.title == p_title; 
+				}
+			);
+			if(found != p_cache.end()){
+				p_found.emplace_back(*found);
+			}
+		}
+
+		/* Found nothing to install so there's nothing to do at this point. */
+		if(p_found.empty()){
+			constexpr const char *message = "No packages found to install.";
+			log::error(message);
+			return error(constants::error::NOT_FOUND, message);
+		}
+		
+		log::println("Packages to install: ");
+		for(const auto& p : p_found){
+			std::string output((p.is_installed) ? p.title + " (reinstall)" : p.title);
+			log::print("  {}  ", (p.is_installed) ? p.title + " (reinstall)" : p.title);
+		}
+		log::println("");
+		
+		if(!params.skip_prompt){
+			if(!utils::prompt_user_yn("Do you want to install these packages? (y/n)"))
+				return error();
+		}
+
+		/* Try and obtain all requested packages. */
+		using ss_pair = std::pair<std::string, std::string>;
+		std::vector<ss_pair> dir_pairs;
+		std::vector<std::future<error>> tasks;
+		rest_api::context rest_api_params = rest_api::make_from_config(config);
+		for(auto& p : p_found){	// TODO: Execute each in parallel using coroutines??
+
+			/* Check if a remote source was provided. If not, then try to get packages
+			in global storage location only. */
+
+			log::info("Fetching asset data for \"{}\"...", p.title);
+			std::string url{config.remote_sources.at(params.remote_source) + rest_api::endpoints::GET_AssetId};
+			std::string package_dir, tmp_dir, tmp_zip;
+
+			/* Retrieve necessary asset data if it was found already in cache */
+			Document doc;
+			bool is_valid = p.download_url.empty() || p.category.empty() || p.description.empty() || p.support_level.empty();
+			if(is_valid){
+				doc = rest_api::get_asset(url, p.asset_id, rest_api_params);
+				if(doc.HasParseError() || doc.IsNull()){
+					constexpr const char *message = "\nError parsing HTTP response.";
+					log::error(message);
+					return error(doc.GetParseError(), message);
+				}
+				p.category			= doc["category"].GetString();
+				p.description 		= doc["description"].GetString();
+				p.support_level 	= doc["support_level"].GetString();
+				p.download_url 		= doc["download_url"].GetString();
+				p.download_hash 	= doc["download_hash"].GetString();
+			}
+			else{
+				log::error("Not a valid package.");
+				/* Package for in cache so no remote request. Still need to populate RapidJson::Document to write to package.json.
+				NOTE: This may not be necessary at all!
+				*/
+				// doc["asset_id"].SetUint64(p.asset_id
+				// doc["type"].SetString(p.type, doc.GetAllocator());
+				// doc["title"].SetString(p.title, doc.GetAllocator());
+				// doc["author"].SetString(p.author, doc.GetAllocator());
+				// doc["author_id"].SetUint64(p.author_id);
+				// doc["version"].SetString(p.version, doc.GetAllocator());
+				// doc["category"].SetString(p.category, doc.GetAllocator());
+				// doc["godot_version"].SetString(p.godot_version, doc.GetAllocator());
+				// doc["cost"].SetString(p.cost, doc.GetAllocator());
+				// doc["description"].SetString(p.description, doc.GetAllocator());
+				// doc["support_level"].SetString(p.support_level, doc.GetAllocator());
+				// doc["download_url"].SetString(p.download_url, doc.GetAllocator());
+				// doc["download_hash"].SetString(p.download_hash, doc.GetAllocator;
+			}
+
+			/* Set directory and temp paths for storage */
+			package_dir = config.packages_dir + "/" + p.title;
+			tmp_dir = config.tmp_dir + "/" + p.title;
+			tmp_zip = tmp_dir + ".zip";
+
+			/* Make directories for packages if they don't exist to keep everything organized */
+			if(!std::filesystem::exists(config.tmp_dir))
+				std::filesystem::create_directories(config.tmp_dir);
+			if(!std::filesystem::exists(config.packages_dir))
+				std::filesystem::create_directories(config.packages_dir);
+
+			/* Dump asset information for lookup into JSON in package directory */
+			if(!std::filesystem::exists(package_dir))
+				std::filesystem::create_directory(package_dir);
+
+			std::ofstream ofs(package_dir + "/asset.json");
+			OStreamWrapper osw(ofs);
+			PrettyWriter<OStreamWrapper> writer(osw);
+			doc.Accept(writer);
+
+			/* Check if we already have a stored temporary file before attempting to download */
+			if(std::filesystem::exists(tmp_zip) && std::filesystem::is_regular_file(tmp_zip)){
+				log::println("Found cached package. Skipping download.", p.title);
+			}
+			else{
+				/* Download all the package files and place them in tmp directory. */
+				log::info_n("Downloading \"{}\"...", p.title);
+				std::string download_url = p.download_url;// doc["download_url"].GetString();
+				std::string title = p.title;// doc["title"].GetString();
+				http::response response = http::download_file(download_url, tmp_zip);
+				if(response.code == http::OK){
+					log::println("Done.");
+				}else{
+					error error(
+						constants::error::HTTP_RESPONSE_ERROR,
+						std::format("HTTP Error: {}", response.code)
+					);
+					log::error(error);
+					return error;
+				}
+			}
+
+			dir_pairs.emplace_back(ss_pair(tmp_zip, package_dir + "/"));
+
+			p.is_installed = true;
+			p.install_path = package_dir;
+
+			/* Extract all the downloaded packages to their appropriate directory location. */
+			for(const auto& p : dir_pairs)
+				utils::extract_zip(p.first.c_str(), p.second.c_str());
+
+			/* Update the cache data with information from  */
+			log::info_n("Updating local asset data...");
+			cache::update_package_info(p_found);
+			log::println("done.");
+				// })
+			// );
+		}
+
+		return error();
+	}
+
+
+	error remove(
+		const config::context& config,
+		const string_list& package_titles, 
+		const package::params& params
+	){
+		using namespace rapidjson;
+		using namespace std::filesystem;
+
+		/* Find the packages to remove if they're is_installed and show them to the user */
+		result_t result = cache::get_package_info_by_title(package_titles);
+		std::vector<package::info> p_cache = result.unwrap_unsafe();
+		if(p_cache.empty()){
+			error error(
+				constants::error::NOT_FOUND,
+				"\nCould not find any packages to remove."
+			);
+			log::error(error);
+			return error;
+		}
+
+		/* Count number packages in cache flagged as is_installed. If there are none, then there's nothing to do. */
+		size_t p_count = 0;
+		std::for_each(p_cache.begin(), p_cache.end(), [&p_count](const package::info& p){
+				p_count += (p.is_installed) ? 1 : 0;
+		});
+
+		if(p_count == 0){
+			error error(
+				constants::error::NOT_FOUND,
+				"\nNo packages to remove."
+			);
+			log::error(error);
+			return error;
+		}
+		
+		log::println("Packages to remove:");
+		for(const auto& p : p_cache)
+			if(p.is_installed)
+				log::print("  {}  ", p.title);
+		log::println("");
+		
+		if(!params.skip_prompt){
+			if(!utils::prompt_user_yn("Do you want to remove these packages? (y/n)"))
+				return error();
+		}
+
+		log::info_n("Removing packages...");
+		for(auto& p : p_cache){
+			const std::filesystem::path path{config.packages_dir};
+			std::filesystem::remove_all(config.packages_dir + "/" + p.title);
+			if(config.verbose > 0){
+				log::debug("package directory: {}", path.string());
+			}
+
+			/* Traverse the package directory */
+			// for(const auto& entry : recursive_directory_iterator(path)){
+			// 	if(entry.is_directory()){
+			// 	}
+			// 	else if(entry.is_regular_file()){
+			// 		std::string filename = entry.path().filename().string();
+			// 		std::string pkg_path = entry.path().lexically_normal().string();
+
+			// 		// pkg_path = utils::replace_all(pkg_path, " ", "\\ ");
+			// 		if(filename == "package.json"){
+			// 			std::string contents = utils::readfile(pkg_path);
+			// 			Document doc;
+			// 			if(config.verbose > 0){
+			// 				log::debug("package path: {}", pkg_path);
+			// 				log::debug("contents: \n{}", contents);
+			// 			}
+			// 			doc.Parse(contents.c_str());
+			// 			if(doc.IsNull()){
+			// 				log::println("");
+			// 				log::error("Could not remove packages. Parsing 'package.json' returned NULL.");
+			// 				return;
+			// 			}
+			// 		}
+			// 	}
+			// }
+			p.is_installed = false;
+		}
+		log::println("Done.");
+		log::info_n("Updating local asset data...");
+		cache::update_package_info(p_cache);
+		log::println("done.");
+
+		return error();
+	}
+
+
+	/** 
+	Removes all local packages.
+	 */
+	error remove_all(
+		const config::context& config,
+		const package::params& params
+	){
+		/* Get the list of all packages to remove then remove */
+		result_t r_installed = cache::get_installed_packages();
+		package::info_list p_installed = r_installed.unwrap_unsafe();
+		result_t r_titles = get_package_titles(p_installed);
+		package::title_list p_titles = r_titles.unwrap_unsafe();
+		return remove(config, p_titles, params);
+	}
+
+
+	error update(
+		const config::context& config,
+		const package::title_list& package_titles, 
+		const package::params& params
+	){
+		using namespace rapidjson;
+
+		/* If no package titles provided, update everything and then exit */
+		rest_api::context rest_api_params = rest_api::make_from_config(config);
+		if(package_titles.empty()){
+			std::string url{constants::HostUrl};
+			url += rest_api::endpoints::GET_AssetId;
+			Document doc = rest_api::get_assets_list(url, rest_api_params);
+			if(doc.IsNull()){
+				constexpr const char *message = "Could not get response from server. Aborting.";
+				log::error(message);
+				return error(constants::error::HOST_UNREACHABLE, message);
+			}
+			return error();
+		}
+
+		/* Fetch remote asset data and compare to see if there are package updates */
+		std::vector<std::string> p_updates = {};
+		result_t r_cache = cache::get_package_info_by_title(package_titles);
+		package::info_list p_cache = r_cache.unwrap_unsafe();
+
+		log::println("Packages to update: ");
+		for(const auto& p_title : p_updates)
+			log::print("  {}  ", p_title);
+		log::println("");
+
+		/* Check version information to see if packages need updates */
+		for(const auto& p : p_cache){
+			std::string url{constants::HostUrl};
+			url += rest_api::endpoints::GET_AssetId;
+			Document doc = rest_api::get_asset(url, p.asset_id);
+			std::string remote_version = doc["version"].GetString();
+			if(p.version != remote_version){
+				p_updates.emplace_back(p.title);
+			}
+		}
+
+		if(!params.skip_prompt){
+			if(!utils::prompt_user_yn("Do you want to update the following packages? (y/n)"))
+				return error();
+		}
+
+		{
+			error error;
+			error = remove(config, p_updates);
+			error = install(config, p_updates, params);
+		}
+		return error();
+	}
+
+
+	error search(
+		const config::context& config,
+		const package::title_list &package_titles, 
+		const package::params& params
+	){
+		result_t r_cache = cache::get_package_info_by_title(package_titles);
+		std::vector<package::info> p_cache = r_cache.unwrap_unsafe();
+		
+		if(!p_cache.empty() && !config.enable_sync){
+			print_list(p_cache);
+			return error();
+		}
+
+		rest_api::context rest_api_params = rest_api::make_from_config(config);
+		for(const auto& p_title : package_titles){
+			using namespace rapidjson;
+		
+			rest_api_params.filter = http::url_escape(p_title);
+			rest_api_params.verbose = config.verbose;
+			rest_api_params.godot_version = config.godot_version;
+			rest_api_params.max_results = 200;
+
+			std::string request_url{constants::HostUrl};
+			request_url += rest_api::endpoints::GET_Asset;
+			Document doc = rest_api::get_assets_list(request_url, rest_api_params);
+			if(doc.IsNull()){
+				error error(
+					constants::error::HOST_UNREACHABLE,
+					"Could not fetch metadata."
+				);
+				log::error(error);
+				return error;
+			}
+
+			log::info("{} package(s) found...", doc["total_items"].GetInt());
+			print_list(doc);
+		}
+		return error();
+	}
+
+
+	error list(
+		const config::context& config,
+		const args_t& args,
+		const opts_t& opts
+	){
+		using namespace rapidjson;
+		using namespace std::filesystem;
+
+		if(opts.empty() || opts.contains("packages")){
+			result_t r_installed = cache::get_installed_packages();
+			info_list p_installed = r_installed.unwrap_unsafe();
+			if(!p_installed.empty()){
+				log::println("Installed packages: ");
+				print_list(p_installed);
+			}
+		}
+		else if(opts.contains("remote")){
+			remote::print_repositories(config);
+		}
+		else{
+			error error(
+				constants::error::UNKNOWN_COMMAND,
+				"Unrecognized subcommand. Try either 'packages' or 'remote' instead."
+
+			);
+			log::error(error);
+		}
+		return error();
+	}
+
+
+	error export_to(const string_list& paths){
+		/* Get all installed package information for export */
+		result_t r_installed = cache::get_installed_packages();
+		info_list p_installed = r_installed.unwrap_unsafe();
+
+		result_t r_titles = get_package_titles(p_installed);
+		title_list p_titles = r_titles.unwrap_unsafe();
+
+		/* Build string of contents with one package title per line */
+		string output{};
+		std::for_each(p_titles.begin(), p_titles.end(), [&output](const string& p){
+			output += p + "\n";
+		});
+
+		/* Write contents of installed packages in reusable format */
+		for(const auto& path : paths ){
+			std::ofstream of(path);
+			if(std::filesystem::exists(path)){
+				constexpr const char *message = "File or directory exists!";
+				log::error(message);
+				of.close();
+				return error(constants::error::FILE_EXISTS, message);
+			}
+			log::println("writing contents to file");
+			of << output;
+			of.close();
+		}
+
+		return error();
+	}
+
+
+	error link(
+		const config::context& config,
+		const title_list& package_titles, 
+		const opts_t& opts
+	){
+		using namespace std::filesystem;
+
+		path_list paths = {};
+		if(opts.contains("path")){
+			paths = opts.at("path");
+		}
+
+		if(paths.empty()){
+			error error(
+				constants::error::PATH_NOT_DEFINED,
+				"No path set. Use '--path' option to set a path."
+			);
+			log::error(error);
+			return error;
+		}
+		result_t r_cache = cache::get_package_info_by_title(package_titles);
+		info_list p_found = {};
+		info_list p_cache = r_cache.unwrap_unsafe();
+		if(p_cache.empty()){
+			error error(
+				constants::error::NOT_FOUND,
+				"Could not find any packages to link."
+			);
+			log::error(error);
+			return error;
+		}
+
+		for(const auto& p_title : package_titles){
+			auto found = std::find_if(p_cache.begin(), p_cache.end(), [&p_title](const package::info& p){ return p.title == p_title; });
+			if(found != p_cache.end()){
+				p_found.emplace_back(*found);
+			}
+		}
+
+		if(p_found.empty()){
+			error error(
+				constants::error::NO_PACKAGE_FOUND,
+				"No packages found to link."
+			);
+			log::error(error);
+			return error;
+		}
+
+		/* Get the storage paths for all packages to create symlinks */
+		const path package_dir{config.packages_dir};
+		for(const auto& p : p_found){
+			for(const auto& path : paths){
+				log::info_n("Creating symlink for \"{}\" package to '{}'...", p.title, path + "/" + p.title);
+				// std::filesystem::path target{config.packages_dir + "/" + p.title};
+				std::filesystem::path target = {current_path().string() + "/" + config.packages_dir + "/" + p.title};
+				std::filesystem::path symlink_path{path + "/" + p.title};
+				if(!std::filesystem::exists(symlink_path.string()))
+					std::filesystem::create_directories(path + "/");
+				std::error_code ec;
+				std::filesystem::create_directory_symlink(target, symlink_path, ec);
+				if(ec){
+					error error(
+						constants::error::STD_ERROR,
+						std::format("Could not create symlink: {}", ec.message())
+					);
+					log::error(error);
+				}
+				log::println("Done.");
+			}
+		}
+		return error();
+	}
+
+
+	error clone(
+		const config::context& config,
+		const title_list& package_titles, 
+		const opts_t& paths
+	){
+		using namespace std::filesystem;
+
+		if(paths.empty()){
+			error error(
+				constants::error::PATH_NOT_DEFINED,
+				"No path set. Use '--path' option to set a path."
+			);
+			log::error(error);
+			return error;
+		}
+
+		result_t r_cache = cache::get_package_info_by_title(package_titles);
+		package::info_list p_found = {};
+		package::info_list p_cache = r_cache.unwrap_unsafe(); 
+		if(p_cache.empty()){
+			error error(
+				constants::error::NO_PACKAGE_FOUND,
+				"Could not find any packages to clone."
+			);
+			log::error(error);
+			return error;
+		}
+
+		for(const auto& p_title : package_titles){
+			auto found = std::find_if(p_cache.begin(), p_cache.end(), [&p_title](const package::info& p){ return p.title == p_title; });
+			if(found != p_cache.end()){
+				p_found.emplace_back(*found);
+			}
+		}
+
+		if(p_found.empty()){
+			error error(
+				constants::error::NO_PACKAGE_FOUND,
+				"No packages found to clone."
+			);
+			log::error(error);
+			return error;
+		}
+
+		/* Get the storage paths for all packages to create clones */
+		const path package_dir{config.packages_dir};
+		for(const auto& p : p_found){
+			for(const auto& path_list : paths){
+				for(const auto& path : path_list.second){
+					log::info("Cloning \"{}\" package to {}", p.title, path + "/" + p.title);
+					std::filesystem::path from{config.packages_dir + "/" + p.title};
+					std::filesystem::path to{path + "/" + p.title};
+					if(!std::filesystem::exists(to.string()))
+						std::filesystem::create_directories(to);
+
+					/* TODO: Add an option to force overwriting (i.e. --overwrite) */
+					std::filesystem::copy(from, to, copy_options::update_existing | copy_options::recursive);
+				}
+			}
+		}
+		return error();
+	}
+
+
+	void print_list(const info_list& packages){
+		for(const auto& p : packages){
+			log::println("{}/{}/{}  {}  id={}\n\tGodot {}, {}, {}, Last Modified: {}",
+				p.support_level,
+				p.author,
+				p.title,
+				p.version,
+				p.asset_id,
+				p.godot_version,
+				p.cost,
+				p.category,
+				p.modify_date
+			);
+		}
+	}
+
+
+	void print_list(const rapidjson::Document& json){
+		for(const auto& o : json["result"].GetArray()){
+			log::println("{}/{}/{}  {}  id={}\n\tGodot {}, {}, {}, Last Modified: {}",
+				o["support_level"]	.GetString(), 
+				o["author"]			.GetString(),
+				o["title"]			.GetString(),
+				o["version_string"]	.GetString(), 
+				o["asset_id"]		.GetString(),
+				o["godot_version"]	.GetString(),
+				o["cost"]			.GetString(),
+				o["category"]		.GetString(),
+				o["modify_date"]	.GetString()
+			);
+		}
+	}
+
+
+	result_t<info_list> get_package_info(const title_list& package_titles){
+		return cache::get_package_info_by_title(package_titles);
+	}
+
+
+	result_t<title_list> get_package_titles(const info_list &packages){
+		title_list package_titles;	
+		std::for_each(packages.begin(), packages.end(), [&package_titles](const package::info& p){
+			package_titles.emplace_back(p.title);
+		});
+		return result_t(package_titles, error());
+	}
+
+
+	void clean_temporary(
+		const config::context& config,
+		const title_list& package_titles
+	){
+		if(package_titles.empty()){
+			log::info("Cleaned all temporary files.");
+			std::filesystem::remove_all(config.tmp_dir);
+		}
+		/* Find the path of each packages is_installed then delete temporaries */
+		log::info_n("Cleaning temporary files...");
+		for(const auto& p_title : package_titles){
+			string tmp_zip = config.tmp_dir + "/" + p_title + ".zip";
+			if(config.verbose > 0)
+				log::info("Removed '{}'", tmp_zip);
+			std::filesystem::remove_all(tmp_zip);
+		}
+		log::println("Done.");
+	}
+
+
+	result_t<info_list> synchronize_database(
+		const config::context& config,
+		const title_list& package_titles
+	){
+		using namespace rapidjson;
+
+		rest_api::context rest_api_params = rest_api::make_from_config(config);
+		rest_api_params.page = 0;
+		int page = 0;
+		int page_length = 0;
+		// int total_pages = 0;
+		int total_items = 0;
+		int items_left = 0;
+
+		log::info("Sychronizing database...");
+		do{
+			/* Make the GET request to get page data and store it in the local 
+			package database. Also, check to see if we need to keep going. */
+			std::string url{constants::HostUrl};
+			url += rest_api::endpoints::GET_Asset;
+			Document doc = rest_api::get_assets_list(url, rest_api_params);
+			rest_api_params.page += 1;
+
+			if(doc.IsNull()){
+				error error(
+					constants::error::EMPTY_RESPONSE,
+					"Could not get response from server. Aborting."
+				);
+				log::error(error);
+				return result_t(info_list(), error);
+			}
+
+			/* Need to know how many pages left to get and how many we get per 
+			request. */
+			page 		= doc["page"].GetInt();
+			page_length = doc["page_length"].GetInt();
+			// total_pages = doc["pages"].GetInt();
+			total_items = doc["total_items"].GetInt();
+			items_left 	= total_items - (page + 1) * page_length;
+
+			// log::info("page: {}, page length: {}, total pages: {}, total items: {}, items left: {}", page, page_length, total_pages, total_items, items_left);
+
+			if(page == 0){
+				error error;
+				error = cache::drop_package_database();
+				error = cache::create_package_database();
+			}
+
+			info_list packages;
+			for(const auto& o : doc["result"].GetArray()){
+				// log::println("=======================");
+				info p{
+					.asset_id 		= std::stoul(o["asset_id"].GetString()),
+					.title 			= o["title"].GetString(),
+					.author 		= o["author"].GetString(),
+					.author_id 		= std::stoul(o["author_id"].GetString()),
+					.version 		= o["version"].GetString(),
+					.godot_version 	= o["godot_version"].GetString(),
+					.cost 			= o["cost"].GetString(),
+					.modify_date 	= o["modify_date"].GetString(),
+					.category		= o["category"].GetString(),
+					.remote_source	= url
+				};
+				packages.emplace_back(p);
+			}
+			error error = cache::insert_package_info(packages);
+			if (error.has_occurred()){
+				log::error(error);
+				/* FIXME: Should this stop here or keep going? */
+			}
+			/* Make the same request again to get the rest of the needed data 
+			using the same request, but with a different page, then update 
+			variables as needed. */
+
+
+		} while(items_left > 0);
+
+		log::println("Done.");
+
+		return cache::get_package_info_by_title(package_titles);
+	}
+
+
+	result_t<info_list> resolve_dependencies(
+		const config::context& config,
+		const title_list& package_titles
+	){
+		result_t r_cache = cache::get_package_info_by_title(package_titles);
+		info_list p_cache = r_cache.unwrap_unsafe();
+		info_list p_deps = {};
+
+		/* Build an graph of every thing to check then install in order */
+		for(const auto& p : p_cache){
+			if(p.dependencies.empty())
+				continue;
+			
+			/* Check if dependency has a dependency. If so, resolve those first. */
+			for(const auto& d : p.dependencies){
+				result_t r_temp = resolve_dependencies(config, {d.title});
+				info_list temp  = r_temp.unwrap_unsafe();
+				utils::move_if_not(temp, p_deps, [](const info& p){ return true; });
+			}
+		}
+
+		return result_t(p_deps, error());
+	}
+}

src/remote.cpp

@@ -0,0 +1,103 @@
+
+#include "remote.hpp"
+#include "error.hpp"
+#include "log.hpp"
+#include "types.hpp"
+#include <readline/readline.h>
+
+namespace gdpm::remote{
+	error _handle_remote(
+		config::context& config, 
+		const args_t& args, 
+		const opts_t& opts
+	){
+		log::println("_handle_remote");
+		for(const auto& arg : args){
+			log::println("arg: {}", arg);
+		}
+		for(const auto& opt : opts){
+			log::println("opt: {}:{}", opt.first, utils::join(opt.second));
+		}
+
+		/* Check if enough arguments are supplied */
+		size_t argc = args.size();
+		if (argc < 1){
+			print_repositories(config);
+			return error();
+		}
+
+		/* Check which subcommand is supplied */
+		string sub_command = args.front();
+		args_t argv(args.begin()+1, args.end());
+		if(argv.size() < 2){
+			error error(
+				constants::error::INVALID_ARGS,
+				"Invalid number of args"
+			);
+			log::error(error);
+			return error;
+		}
+		string name = argv[1];
+		string url = argv[2];
+		if(sub_command == "add") 			add_repositories(config, {{name, url}});
+		else if (sub_command == "remove") 	remove_respositories(config, argv);
+		// else if (sub_command == "set")		set_repositories(config::context &context, const repository_map &repos)
+		else if (sub_command == "list")		print_repositories(config);
+		else{
+			error error(
+				constants::error::UNKNOWN,
+				"Unknown sub-command. Try 'gdpm help remote' for options."
+			);
+			log::error(error);
+			return error;
+		}
+		return error();
+	}
+
+	
+	void set_repositories(
+		config::context& config, 
+		const repository_map &repos
+	){
+		config.remote_sources = repos;
+	}
+
+
+	void add_repositories(
+		config::context& config, 
+		const repository_map &repos
+	){
+		std::for_each(repos.begin(), repos.end(), 
+			[&config](const string_pair& p){
+				config.remote_sources.insert(p);
+			}
+		);
+	}
+
+
+	void remove_respositories(
+		config::context& config, 
+		const repo_names& names
+	){
+		std::for_each(names.end(), names.begin(), [&config](const string& repo){
+			config.remote_sources.erase(repo);
+		});
+	}
+
+
+	void move_respository(
+		config::context& config, 
+		int old_position, 
+		int new_position
+	){
+
+	}
+
+	void print_repositories(const config::context& config){
+		log::println("Remote sources:");
+		const auto &rs = config.remote_sources;
+		std::for_each(rs.begin(), rs.end(), [](const string_pair& p){
+			log::println("\t{}: {}", p.first, p.second);
+		});
+	}
+}

src/rest_api.cpp

@@ -15,16 +15,12 @@
 #include <curlpp/Exception.hpp>
 
 namespace gdpm::rest_api{
-	bool register_account(const std::string& username, const std::string& password, const std::string& email){
-		return false;
-	}
 	
-	bool login(const std::string& username, const std::string& password){
+	context make_from_config(const config::context& config){
-		return false;
+		context params = make_context();
-	}
+		params.godot_version 	= config.godot_version;
-
+		params.verbose 			= config.verbose;
-	bool logout(){
+		return params;
-		return false;
 	}
 
 	context make_context(type_e type, int category, support_e support, const std::string& filter, const std::string& user, const std::string& godot_version, int max_results, int page, sort_e sort, bool reverse, int verbose){
@@ -44,7 +40,29 @@ namespace gdpm::rest_api{
 		return params;
 	}
 
-	rapidjson::Document _parse_json(const std::string& r, int verbose){
+	bool register_account(
+		const string& username, 
+		const string& password, 
+		const string& email
+	){
+		return false;
+	}
+
+	bool login(
+		const string& username, 
+		const string& password
+	){
+		return false;
+	}
+
+	bool logout(){
+		return false;
+	}
+
+	rapidjson::Document _parse_json(
+		const string& r, 
+		int verbose
+	){
 		using namespace rapidjson;
 		Document d;
 		d.Parse(r.c_str());
@@ -58,7 +76,7 @@ namespace gdpm::rest_api{
 		return d;
 	}
 
-	std::string to_string(type_e type){
+	string to_string(type_e type){
 		std::string _s{"type="};
 		switch(type){
 			case any:		_s += "any"; 		break;
@@ -68,8 +86,8 @@ namespace gdpm::rest_api{
 		return _s;
 	}
 
-	std::string to_string(support_e support){
+	string to_string(support_e support){
-		std::string _s{"support="};
+		string _s{"support="};
 		switch(support){
 			case all:		_s += "official+community+testing";	break;
 			case official:	_s += "official";	break;
@@ -79,8 +97,8 @@ namespace gdpm::rest_api{
 		return _s;
 	}
 
-	std::string to_string(sort_e sort){
+	string to_string(sort_e sort){
-		std::string _s{"sort="};
+		string _s{"sort="};
 		switch(sort){
 			case none:		_s += "";			break;
 			case rating:	_s += "rating";		break;
@@ -91,16 +109,19 @@ namespace gdpm::rest_api{
 		return _s;
 	}
 
-	std::string _prepare_request(const std::string &url, const context &c){
+	string _prepare_request(
-		std::string request_url{url};
+		const string &url, 
+		const context &c
+	){
+		string request_url{url};
 		request_url += to_string(c.type);
-		request_url += (c.category <= 0) ? "&category=" : "&category="+fmt::to_string(c.category);
+		request_url += (c.category <= 0) ? "&category=" : "&category="+std::to_string(c.category);
 		request_url += "&" + to_string(c.support);
 		request_url += "&" + to_string(c.sort);
 		request_url += (!c.filter.empty()) ? "&filter="+c.filter : "";
 		request_url += (!c.godot_version.empty()) ? "&godot_version="+c.godot_version : "";
-		request_url += "&max_results=" + fmt::to_string(c.max_results);
+		request_url += "&max_results=" + std::to_string(c.max_results);
-		request_url += "&page=" + fmt::to_string(c.page);
+		request_url += "&page=" + std::to_string(c.page);
 		request_url += (c.reverse) ? "&reverse" : "";
 		return request_url;
 	}
@@ -122,8 +143,12 @@ namespace gdpm::rest_api{
 		);
 	}
 
-	rapidjson::Document configure(const std::string& url, type_e type, int verbose){
+	rapidjson::Document configure(
-		std::string request_url{url};
+		const string& url, 
+		type_e type, 
+		int verbose
+	){
+		string request_url{url};
 		request_url += to_string(type);
 		http::response r = http::request_get(url);
 		if(verbose > 0)
@@ -131,7 +156,20 @@ namespace gdpm::rest_api{
 		return _parse_json(r.body);
 	}
 
-	rapidjson::Document get_assets_list(const std::string& url, type_e type, int category, support_e support, const std::string& filter,const std::string& user, const std::string& godot_version, int max_results, int page, sort_e sort, bool reverse, int verbose){
+	rapidjson::Document get_assets_list(
+		const string& url, 
+		type_e type, 
+		int category, 
+		support_e support, 
+		const string& filter,
+		const string& user, 
+		const string& godot_version, 
+		int max_results, 
+		int page, 
+		sort_e sort, 
+		bool reverse, 
+		int verbose
+	){
 		context c{
 			.type 			= type,
 			.category 		= category,
@@ -148,16 +186,23 @@ namespace gdpm::rest_api{
 		return get_assets_list(url, c);
 	}
 
-	rapidjson::Document get_assets_list(const std::string& url, const context& c){
+	rapidjson::Document get_assets_list(
-		std::string request_url = _prepare_request(url, c);
+		const string& url, 
+		const context& c
+	){
+		string request_url = _prepare_request(url, c);
 		http::response r = http::request_get(request_url);
 		if(c.verbose > 0)
 			log::info("URL: {}", request_url);
 		return _parse_json(r.body, c.verbose);
 	}
 
-	rapidjson::Document get_asset(const std::string& url, int asset_id, const context& params){
+	rapidjson::Document get_asset(
-		std::string request_url = _prepare_request(url, params);
+		const string& url, 
+		int asset_id, 
+		const context& params
+	){
+		string request_url = _prepare_request(url, params);
 		utils::replace_all(request_url, "{id}", std::to_string(asset_id));
 		http::response r = http::request_get(request_url.c_str());
 		if(params.verbose > 0)
@@ -187,16 +232,16 @@ namespace gdpm::rest_api{
 
 		}
 
-		std::string review_asset_edit(int asset_id){
+		string review_asset_edit(int asset_id){
-			return std::string();
+			return string();
 		}
 
-		std::string accept_asset_edit(int asset_id){
+		string accept_asset_edit(int asset_id){
-			return std::string();
+			return string();
 		}
 
-		std::string reject_asset_edit(int asset_id){
+		string reject_asset_edit(int asset_id){
-			return std::string();
+			return string();
 		}
 
 	} // namespace edits

src/utils.cpp

@@ -66,14 +66,22 @@ namespace gdpm::utils{
 		return result;
 	}
 
-	std::string replace_first(std::string &s, const std::string &from, const std::string &to){
+	std::string replace_first(
+		std::string &s, 
+		const std::string &from, 
+		const std::string &to
+	){
 		size_t pos = s.find(from);
 		if(pos == std::string::npos)
 			return s;
 		return s.replace(pos, from.length(), to);
 	}
 
-	std::string replace_all(std::string& s, const std::string& from, const std::string& to){
+	std::string replace_all(
+		std::string& s, 
+		const std::string& from, 
+		const std::string& to
+	){
 		size_t pos = 0;
 		while((pos = s.find(from, pos)) != std::string::npos){
 			s.replace(pos, s.length(), to);
@@ -83,7 +91,11 @@ namespace gdpm::utils{
 	}
 
 	/* Ref: https://gist.github.com/mobius/1759816 */
-	int extract_zip(const char *archive, const char *dest, int verbose){
+	int extract_zip(
+		const char *archive, 
+		const char *dest, 
+		int verbose
+	){
 		const char *prog = "gpdm";
 		struct zip *za;
 		struct zip_file *zf;
@@ -179,4 +191,15 @@ namespace gdpm::utils{
 		sleep_for(millis);
 		// sleep_until(system_clock::now() + millis);
 	}
+
+	std::string join(
+		const std::vector<std::string>& target,
+		const std::string& delimiter
+	){
+		std::string o;
+		std::for_each(target.begin(), target.end(), [&o, &delimiter](const std::string& s){
+			o += s + delimiter;
+		});
+		return o;
+	}
 } // namespace gdpm::utils

tests/basic.cpp

@@ -4,11 +4,12 @@
 #include "log.hpp"
 #include "cache.hpp"
 #include "config.hpp"
+#include "package.hpp"
 
 #include <doctest.h>
 
 
-TEST_SUITE("Cache functions"){
+TEST_SUITE("Caching functions"){
 
 	TEST_CASE("Test cache database functions"){
 		gdpm::cache::create_package_database();
@@ -21,33 +22,34 @@ TEST_SUITE("Command functions"){
 	using namespace gdpm::package_manager;
 
 	config::context config = config::make_context();
-	std::vector<std::string> packages{"ResolutionManagerPlugin","godot-hmac", "Godot"};
+	package::params params = package::params();
+	package::title_list package_titles{"ResolutionManagerPlugin","godot-hmac", "Godot"};
 
 	auto check_error = [](const error& error){
-		if(error.has_error()){
+		if(error.has_occurred()){
-			log::error(error.get_message());
+			log::error(error);
 		}
 
-		CHECK(!error.has_error());
+		CHECK(!error.has_occurred());
 	};
 
 
 	TEST_CASE("Test install packages"){
-		check_error(install_packages(packages, true));
+		check_error(package::install(config, package_titles, params));
 	}
 
 
 	TEST_CASE("Test searching packages"){
-		check_error(search_for_packages(packages, true));
+		check_error(package::search(config, package_titles, params));
 	}
 
 
 	TEST_CASE("Test remove packages"){
-		check_error(remove_packages(packages, true));
+		check_error(package::remove(config, package_titles, params));
 	}
 
 	TEST_CASE("Test exporting installed package list"){
-		check_error(export_packages({"tests/gdpm/.tmp/packages.txt"}));
+		check_error(package::export_to({"tests/gdpm/.tmp/packages.txt"}));
 	}
 
 }