first attempt to download something

CMakeLists.txt

@@ -23,6 +23,7 @@ elseif (CMAKE_BUILD_TYPE STREQUAL "Debug")
 endif()
 
 find_package(nlohmann_json REQUIRED)
+find_package(CURL REQUIRED)
 
 add_executable(${PROJECT_NAME})
 
@@ -42,6 +43,7 @@ add_subdirectory(src)
 add_subdirectory(test)
 
 target_link_libraries(${PROJECT_NAME} PRIVATE nlohmann_json::nlohmann_json)
+target_link_libraries(${PROJECT_NAME} PRIVATE CURL::libcurl)
 
 install(TARGETS ${PROJECT_NAME}
         EXPORT ${PROJECT_NAME}Targets

src/CMakeLists.txt

@@ -1,10 +1,12 @@
 set(SOURCES
     main.cpp
+    loggger.cpp
     project.cpp
     dependency.cpp
 )
 
 set(HEADERS
+    logger.h
     project.h
     dependency.cpp
 )

src/dependency.cpp

@@ -1,5 +1,11 @@
 #include "dependency.h"
 
+#include <regex>
+
+#include "project.h"
+
+const std::regex http("^https?://");
+
 Dependency::Dependency(
     const std::string& path,
     Type type,
@@ -23,3 +29,69 @@ std::optional<std::string> Dependency::getName() const {
 std::optional<std::string> Dependency::getVersion() const {
     return version;
 }
+
+bool Dependency::prepare(const std::filesystem::path& source, const std::filesystem::path& destination) {
+    if (std::regex_search(path, http)) {
+        Project::info("downloading project from " + path);
+        std::filesystem::create_directories(destination / "downloads");
+
+        return download(destination);
+    } else {
+        Project::info("checking project at path " + path);
+        std::filesystem::directory_entry srcDir(source / path);
+        if (!srcDir.exists()) {
+            Project::error("Project at " + path + " doesn't exist");
+            return false;
+        }
+    }
+
+    return true;
+}
+
+bool Dependency::download(const std::filesystem::path& destination) {
+    std::filesystem::path dwn = destination / "downloads";
+    bool result = std::filesystem::create_directories(dwn);
+    // if (!result) {
+    //     Project::error("couldn't create " + dwn.string());
+    //     return result;
+    // }
+
+    CURL *curl_handle;
+    std::filesystem::path out = dwn / ("out" + std::to_string(std::rand()));
+    FILE *pagefile;
+
+    curl_global_init(CURL_GLOBAL_ALL);
+    /* init the curl session */
+    curl_handle = curl_easy_init();
+    /* set URL to get here */
+    curl_easy_setopt(curl_handle, CURLOPT_URL, path.c_str());
+    /* disable progress meter, set to 0L to enable it */
+    curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
+    /* send all data to this function  */
+    curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write);
+
+    /* open the file */
+    pagefile = fopen(out.c_str(), "wb");
+    if (pagefile) {
+        /* write the page body to this file handle */
+        curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);
+        /* get it! */
+        curl_easy_perform(curl_handle);
+        /* close the header file */
+        fclose(pagefile);
+    } else {
+        Project::error(std::string("couldn't open output file ") + out.c_str());
+    }
+
+    /* cleanup curl stuff */
+    curl_easy_cleanup(curl_handle);
+    curl_global_cleanup();
+
+    return true;
+}
+
+
+size_t Dependency::write(void* file, size_t size, size_t nmemb, void* stream) {
+    size_t written = fwrite(file, size, nmemb, (FILE *)stream);
+    return written;
+}

src/dependency.h

@@ -2,6 +2,10 @@
 
 #include <string>
 #include <optional>
+#include <filesystem>
+
+#include <curl/curl.h>
+#include <stdio.h>
 
 class Dependency {
 public:
@@ -22,8 +26,14 @@ public:
     std::optional<std::string> getName() const;
     std::optional<std::string> getVersion() const;
 
+    bool prepare(const std::filesystem::path& source, const std::filesystem::path& destination);
+
     const std::string path;
 
+private:
+    static size_t write(void *file, size_t size, size_t nmemb, void *stream);
+    bool download(const std::filesystem::path& destination);
+
 private:
     Type type;
     std::optional<std::string> name;

src/loggger.cpp

@@ -0,0 +1,59 @@
+#include "loggger.h"
+
+constexpr const std::array<std::string_view, static_cast<int>(Logger::Severity::fatal) + 1> logSettings({
+    /*debug*/   "\e[90m",
+    /*info*/    "\e[32m",
+    /*minor*/   "\e[34m",
+    /*major*/   "\e[94m",
+    /*warning*/ "\e[33m",
+    /*error*/   "\e[31m",
+    /*fatal*/   "\e[91m"
+});
+
+constexpr const std::array<std::string_view, static_cast<int>(Logger::Severity::fatal) + 1> logHeaders({
+    /*debug*/   "DEBUG: ",
+    /*info*/    "INFO: ",
+    /*minor*/   "MINOR: ",
+    /*major*/   "MAJOR: ",
+    /*warning*/ "WARNING: ",
+    /*error*/   "ERROR: ",
+    /*fatal*/   "FATAL: "
+});
+
+constexpr const std::string_view bold("\e[1m");
+constexpr const std::string_view regular("\e[22m");
+constexpr const std::string_view clearStyle("\e[0m");
+
+Logger::Logger(Logger::Severity severity):
+    currentSeverity(severity),
+    history(),
+    readMutex(),
+    writeMutex()
+{}
+
+Logger::~Logger()
+{}
+
+void Logger::printLog(bool colored) {
+    std::cout << std::endl;
+    for (const Message& message : history) {
+        if (colored) {
+            int severity = static_cast<int>(message.first);
+            std::cout << logSettings[severity] << bold << logHeaders[severity] << regular;
+        }
+        std::cout << message.second << std::endl;
+    }
+    if (colored)
+        std::cout << clearStyle << std::flush;
+}
+
+void Logger::log(Logger::Severity severity, const std::string& comment) const {
+    std::scoped_lock lock(readMutex, writeMutex);
+    if (severity >= currentSeverity)
+        history.emplace_back(severity, comment);
+}
+
+std::list<std::pair<Logger::Severity, std::string>> Logger::getLog() const {
+    std::scoped_lock lock(readMutex);
+    return history;
+}

src/loggger.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <list>
+#include <string>
+#include <mutex>
+#include <array>
+#include <string_view>
+#include <iostream>
+
+class Logger {
+public:
+    enum class Severity {
+        debug,
+        info,
+        minor,
+        major,
+        warning,
+        error,
+        fatal
+    };
+    typedef std::pair<Severity, std::string> Message;
+
+    Logger(Severity severity = Severity::info);
+    ~Logger();
+
+    void log (Severity severity, const std::string& comment) const;
+    std::list<Message> getLog() const;
+    void printLog(bool colored = true);
+
+private:
+    const Severity currentSeverity;
+    mutable std::list<Message> history;
+    mutable std::mutex readMutex;
+    mutable std::mutex writeMutex;
+
+};

src/main.cpp

@@ -1,29 +1,34 @@
-#include <iostream>
 #include <string>
 
 #include "project.h"
 
 int main(int argc, char *argv[]) {
     std::string firstArg;
+    std::string secondArg;
     if (argc > 1)
         firstArg = argv[1];
     else
         firstArg = "./";
 
-    Project root(firstArg);
+    if (argc > 2)
+        secondArg = argv[2];
+    else
+        secondArg = "./";
+
+    Project root(firstArg, secondArg);
     bool success = root.read();
 
-    if (!success) {
+    int result = -1;
-        Project::Log log(root.getLog());
+    if (success) {
-        for (const Project::LogMessage& msg : log)
+        root.info("successfully parsed project " + root.getName());
-            std::cout << msg << std::endl;
+        root.info("dependencies count is " + std::to_string(root.dependenciesCount()));
 
-        return -1;
+        root.discover();
-    } else {
+        result = 0;
-        std::cout << "successfully parsed project " << root.getName() << std::endl;
-        std::cout << "dependencies count is " << root.dependenciesCount() << std::endl;
     }
 
+    root.printLog();
 
-    return 0;
+
+    return result;
 }

src/project.cpp

@@ -15,31 +15,54 @@ std::map<std::string, Dependency::Type> types({
     {"automatic", Dependency::Type::automatic}
 });
 
-Project::Project(const std::filesystem::path& location):
+Logger* Project::logger = nullptr;
+
+Project::Project(const std::filesystem::path& location, const std::filesystem::path& destination):
     location(location),
-    status(Status::unknown),
+    destination(destination),
+    state(State::unknown),
     name(),
-    logStorage(),
+    dependencies(),
-    dependencies()
+    root(logger == nullptr)
-{}
+{
+    if (root)
+        logger = new Logger();
+}
+
+Project::~Project() {
+    if (root) {
+        delete logger;
+        logger = nullptr;
+    }
+}
 
 bool Project::read() {
-    if (status == Status::read)
+    if (state == State::read)
         return true;
 
     std::filesystem::path entryPointPath;
     try {
-        entryPointPath = std::filesystem::canonical(location) / entry;
+        location = std::filesystem::canonical(location);
+        entryPointPath = location / entry;
     } catch (const std::exception& e) {
-        log(e.what());
+        fatal(e.what());
-        status = Status::error;
+        state = State::error;
+        return false;
+    }
+
+    try {
+        std::filesystem::create_directories(destination);
+        destination = std::filesystem::canonical(destination);
+    } catch (const std::exception& e) {
+        fatal(e.what());
+        state = State::error;
         return false;
     }
 
     std::ifstream file(entryPointPath);
     if (!file.is_open()) {
-        log("couldn't open " + std::string(entryPointPath));
+        fatal("couldn't open " + entryPointPath.string());
-        status = Status::error;
+        state = State::error;
         return false;
     }
 
@@ -47,16 +70,16 @@ bool Project::read() {
     try {
         data = json::parse(file);
     } catch (const json::exception& e) {
-        log(e.what());
+        fatal(e.what());
-        status = Status::error;
+        state = State::error;
         return false;
     }
 
     try {
         parse(data);
     } catch (const std::exception& e) {
-        log(e.what());
+        fatal(e.what());
-        status = Status::error;
+        state = State::error;
         return false;
     }
 
@@ -126,21 +149,54 @@ void Project::createDepencencyFromObject(const nlohmann::json& entry) {
     dependencies.emplace(url, Dependency{url, type, name, version});
 }
 
+void Project::discover() {
+    int fine = 0;
+    for (std::pair<const std::string, Dependency>& pair : dependencies) {
+        bool success = pair.second.prepare(location, destination);
+        if (success)
+            fine++;
+    }
+
+
+}
+
+
 uint32_t Project::dependenciesCount() const {
     return dependencies.size();
 }
 
-
+void Project::log(Logger::Severity severity, const std::string& message) {
-void Project::log(const std::string& message) const {
+    if (logger != nullptr)
-    logStorage.emplace_back(message);
+        logger->log(severity, message);
 }
 
-Project::Log Project::getLog() const {
+void Project::info(const std::string& message) {
-    return logStorage;
+    log(Logger::Severity::info, message);
 }
 
-Project::Status Project::getStatus() const {
+void Project::debug(const std::string& message) {
-    return status;
+    log(Logger::Severity::debug, message);
+}
+
+void Project::error(const std::string& message) {
+    log(Logger::Severity::error, message);
+}
+
+void Project::warn(const std::string& message) {
+    log(Logger::Severity::warning, message);
+}
+
+void Project::fatal(const std::string& message) {
+    log(Logger::Severity::fatal, message);
+}
+
+void Project::printLog() {
+    if (logger != nullptr)
+        logger->printLog();
+}
+
+Project::State Project::getStatus() const {
+    return state;
 }
 
 std::string Project::getName() const {

src/project.h

@@ -10,35 +10,47 @@
 #include <nlohmann/json.hpp>
 
 #include "dependency.h"
+#include "loggger.h"
 
 class Project {
 public:
-    typedef std::string LogMessage;
+    enum class State {
-    typedef std::list<LogMessage> Log;
-    enum class Status {
         unknown,
         read,
+        discovering,
         error
     };
 
-    Project(const std::filesystem::path& location);
+    Project(const std::filesystem::path& location, const std::filesystem::path& destination);
+    ~Project();
+
     bool read();
-    Status getStatus() const;
+    void discover();
-    Log getLog() const;
+    State getStatus() const;
     std::string getName() const;
     uint32_t dependenciesCount() const;
 
+    static void log(Logger::Severity severity, const std::string& message);
+    static void debug(const std::string& message);
+    static void info(const std::string& message);
+    static void warn(const std::string& message);
+    static void error(const std::string& message);
+    static void fatal(const std::string& message);
+    static void printLog();
+
 private:
-    void log(const std::string& message) const;
     void parse(const nlohmann::json& json);
     void createDepencencyFromString(const std::string& entry);
     void createDepencencyFromObject(const nlohmann::json& entry);
 
 private:
     std::filesystem::path location;
-    Status status;
+    std::filesystem::path destination;
+    State state;
     std::string name;
-    mutable Log logStorage;
     std::map<std::string, Dependency> dependencies;
+    const bool root;
+
+    static Logger* logger;
 
 };