Almost done with updating metadata of song, just need to handle records that have no related records associated with them

CMakeLists.txt

@@ -65,7 +65,9 @@ set(HEADERS
     include/type/ArtistFilter.h
     include/type/CoverFilter.h
     include/type/GenreFilter.h
+    include/type/PathType.h
     include/type/Scopes.h
+    include/type/SongChanged.h
     include/type/SongFilter.h
     include/type/YearFilter.h
 )

include/database/CoverArtRepository.h

@@ -25,6 +25,7 @@ namespace database
 
         void deleteRecord(const model::Cover&);
         void saveRecord(const model::Cover&);
+        void updateRecord(const model::Cover&);
     private:
         std::vector<model::Cover> parseRecords(MYSQL_STMT*);
 

include/database/SongRepository.h

@@ -20,12 +20,13 @@ namespace database
 
         std::vector<model::Song> retrieveRecords();
 
-        bool doesSongExist(const model::Song&, type::SongFilter);
-
         model::Song retrieveRecord(model::Song&, type::SongFilter);
 
+        bool doesSongExist(const model::Song&, type::SongFilter);
         bool deleteRecord(const model::Song&);
+
         void saveRecord(const model::Song&);
+        void updateRecord(const model::Song&);
     private:
         std::vector<model::Song> parseRecords(MYSQL_RES*); // TODO: to be removed
         std::vector<model::Song> parseRecords(MYSQL_STMT*);

include/manager/AlbumManager.h

@@ -14,6 +14,7 @@ namespace manager
         model::Album saveAlbum(const model::Song&);
 
         void deleteAlbum(const model::Song&);
+        void updateAlbum(model::Song&, const model::Song&);
 
         static void printAlbum(const model::Album&);
     private:

include/manager/ArtistManager.h

@@ -14,6 +14,7 @@ namespace manager
         model::Artist saveArtist(const model::Song&);
 
         void deleteArtist(const model::Song&);
+        void updateArtist(model::Song&, const model::Song&);
 
         static void printArtist(const model::Artist&);
     private:

include/manager/CoverArtManager.h

@@ -2,6 +2,7 @@
 #define COVERARTMANAGER_H_
 
 #include <string>
+#include <utility>
 
 #include "model/Models.h"
 
@@ -13,9 +14,14 @@ namespace manager
         CoverArtManager(const std::string&);
         CoverArtManager(const model::BinaryPath& bConf);
 
-        model::Cover saveCover(const model::Song&, std::string&, const std::string&);
+        model::Cover saveCover(const model::Song&, std::string&, 
+            const std::string&);
+
+        std::pair<bool, std::string> defaultCover(const model::Cover&);
         
         void deleteCover(const model::Song&);
+        void updateCover(const model::Song&);
+        void updateCoverRecord(const model::Song&);
     private:
         model::BinaryPath m_bConf;
         std::string path;

include/manager/DirectoryManager.h

@@ -7,6 +7,7 @@
 #include <nlohmann/json.hpp>
 
 #include "model/Models.h"
+#include "type/PathType.h"
 
 namespace manager
 {
@@ -14,17 +15,20 @@ namespace manager
     {
     public:
         static std::string createDirectoryProcess(model::Song, const std::string&);
+        static std::string createDirectoryProcess(const model::Song&, const model::BinaryPath&, type::PathType);
         static std::string configPath(std::string_view);
         static std::string configPath(const model::BinaryPath&);
         static std::string contentOfPath(const std::string&);
+        static std::string retrievePathType(type::PathType);
 
         static nlohmann::json credentialConfigContent(const model::BinaryPath&);
         static nlohmann::json databaseConfigContent(const model::BinaryPath&);
         static nlohmann::json pathConfigContent(const model::BinaryPath&);
 
-        void deleteCoverArtFile(const std::string&, const std::string&);
         static void deleteDirectories(model::Song, const std::string&);
 
+        void deleteCoverArtFile(const std::string&, const std::string&);
+
     private:
         void deleteSong(const model::Song);
     };

include/manager/GenreManager.h

@@ -14,6 +14,7 @@ namespace manager
         model::Genre saveGenre(const model::Song&);
 
         void deleteGenre(const model::Song&);
+        void updateGenre(model::Song&, const model::Song&);
 
         static void printGenre(const model::Genre&);
     private:

include/manager/SongManager.h

@@ -2,12 +2,14 @@
 #define SONGMANAGER_H_
 
 #include <iostream>
+#include <map>
 #include <string>
 
 #include <nlohmann/json.hpp>
 
 #include "dto/SongDto.hpp"
 #include "model/Models.h"
+#include "type/SongChanged.h"
 
 namespace manager
 {
@@ -17,6 +19,7 @@ namespace manager
         SongManager(std::string&);
         SongManager(const model::BinaryPath&);
 
+
         bool didSongChange(const model::Song&, const model::Song&);
         bool requiresFilesystemChange(const model::Song&, const model::Song&);
 
@@ -28,9 +31,17 @@ namespace manager
 
         static void printSong(const model::Song&);
     private:
+        std::map<type::SongChanged, bool> changesInSong(const model::Song&, const model::Song&);
+
+        void assignMiscId(model::Song&, const model::Song&);
+        void assignMiscFields(std::map<type::SongChanged, bool>&, model::Song&, 
+            const model::Song&);
         void saveSongTemp(model::Song&);
         void saveMisc(model::Song&);
         void deleteMisc(const model::Song&);
+        void updateMisc(const std::map<type::SongChanged, bool>&, 
+            model::Song&, const model::Song&);
+        void modifySongOnFilesystem(model::Song&, const model::Song&);
 
         model::BinaryPath m_bConf;
         std::string exe_path;

include/manager/YearManager.h

@@ -14,6 +14,7 @@ namespace manager
         model::Year saveYear(const model::Song&);
 
         void deleteYear(const model::Song&);
+        void updateYear(model::Song&, const model::Song&);
 
         static void printYear(const model::Year&);
     private:

include/type/PathType.h

@@ -0,0 +1,15 @@
+#ifndef PATHTYPE_H_
+#define PATHTYPE_H_
+
+namespace type
+{
+    enum PathType
+    {
+        music = 0,
+        archive,
+        temp,
+        coverArt
+    };
+}
+
+#endif

include/type/SongChanged.h

@@ -0,0 +1,16 @@
+#ifndef SONGCHANGED_H_
+#define SONGCHANGED_H_
+
+namespace type
+{
+    enum SongChanged
+    {
+        title = 0,
+        artist,
+        album,
+        genre,
+        year
+    };
+}
+
+#endif

src/database/CoverArtRepository.cpp

@@ -79,6 +79,7 @@ model::Cover database::CoverArtRepository::retrieveRecord(model::Cover& cov, typ
     return covDb;
 }
 
+
 bool database::CoverArtRepository::doesCoverArtExist(const model::Cover& cover, type::CoverFilter filter)
 {
     auto conn = setupMysqlConnection();
@@ -130,6 +131,7 @@ bool database::CoverArtRepository::doesCoverArtExist(const model::Cover& cover,
     return (rowCount > 0) ? true : false;
 }
 
+
 // TODO: change to prepared statement
 void database::CoverArtRepository::deleteRecord(const model::Cover& cov)
 {
@@ -176,6 +178,49 @@ void database::CoverArtRepository::saveRecord(const model::Cover& cov)
     std::cout << "saved cover art record" << std::endl;
 }
 
+void database::CoverArtRepository::updateRecord(const model::Cover& cover)
+{
+    std::stringstream qry;
+    auto conn = setupMysqlConnection();
+    auto stmt = mysql_stmt_init(conn);
+
+    qry << "UPDATE CoverArt SET ";
+    qry << "SongTitle = ?, ";
+    qry << "ImagePath = ? ";
+    qry << "WHERE CoverArtId = ?";
+
+    MYSQL_BIND params[3];
+    memset(params, 0, sizeof(params));
+
+    auto songTitleLength = cover.songTitle.size();
+    auto imagePathLength = cover.imagePath.size();
+
+    params[0].buffer_type = MYSQL_TYPE_STRING;
+    params[0].buffer = (char*)cover.songTitle.c_str();
+    params[0].length = &songTitleLength;
+    params[0].is_null = 0;
+
+    params[1].buffer_type = MYSQL_TYPE_STRING;
+    params[1].buffer = (char*)cover.imagePath.c_str();
+    params[1].length = &imagePathLength;
+    params[1].is_null = 0;
+
+    params[2].buffer_type = MYSQL_TYPE_LONG;
+    params[2].buffer = (char*)&cover.id;
+    params[2].length = 0;
+    params[2].is_null = 0;
+
+    const std::string query = qry.str();
+    auto status = mysql_stmt_prepare(stmt, query.c_str(), query.size());
+    status = mysql_stmt_bind_param(stmt, params);
+    status = mysql_stmt_execute(stmt);
+
+    mysql_stmt_close(stmt);
+    mysql_close(conn);
+
+    std::cout << "updated cover art record" << std::endl;
+}
+
 
 std::vector<model::Cover> database::CoverArtRepository::parseRecords(MYSQL_STMT *stmt)
 {

src/database/SongRepository.cpp

@@ -31,6 +31,7 @@ std::vector<model::Song> database::SongRepository::retrieveRecords()
     return songs;
 }
 
+
 model::Song database::SongRepository::retrieveRecord(model::Song& song, type::SongFilter filter)
 {
     std::stringstream qry;
@@ -82,6 +83,7 @@ model::Song database::SongRepository::retrieveRecord(model::Song& song, type::So
     return song;
 }
 
+
 bool database::SongRepository::doesSongExist(const model::Song& song, type::SongFilter filter)
 {
     std::cout << "checking to see if song exists" << std::endl;
@@ -250,6 +252,98 @@ void database::SongRepository::saveRecord(const model::Song& song)
     std::cout << "done inserting song record" << std::endl;
 }
 
+void database::SongRepository::updateRecord(const model::Song& song)
+{
+    std::cout << "executing query to update record" << std::endl;
+    auto conn = setupMysqlConnection();
+    auto stmt = mysql_stmt_init(conn);
+
+    std::stringstream qry;
+    qry << "UPDATE Song SET Title = ?, Artist = ?, Album = ?, Genre = ?, ";
+    qry << "Year = ?, SongPath = ?, CoverArtId = ?, ArtistId = ?, ";
+    qry << "AlbumId = ?, GenreId = ?, YearId = ? WHERE SongId = ?";
+    const auto query = qry.str();
+
+    auto status = mysql_stmt_prepare(stmt, query.c_str(), query.size());
+
+    MYSQL_BIND params[12];
+    memset(params, 0, sizeof(params));
+
+    params[0].buffer_type = MYSQL_TYPE_STRING;
+    params[0].buffer = (char*)song.title.c_str();
+    auto titleLength = song.title.size();
+    params[0].length = &titleLength;
+    params[0].is_null = 0;
+
+    params[1].buffer_type = MYSQL_TYPE_STRING;
+    params[1].buffer = (char*)song.artist.c_str();
+    auto artistLength = song.artist.size();
+    params[1].length = &artistLength;
+    params[1].is_null = 0;
+
+    params[2].buffer_type = MYSQL_TYPE_STRING;
+    params[2].buffer = (char*)song.album.c_str();
+    auto albumLength = song.album.size();
+    params[2].length = &albumLength;
+    params[2].is_null = 0;
+
+    params[3].buffer_type = MYSQL_TYPE_STRING;
+    params[3].buffer = (char*)song.genre.c_str();
+    auto genreLength = song.genre.size();
+    params[3].length = &genreLength;
+    params[3].is_null = 0;
+
+    params[4].buffer_type = MYSQL_TYPE_LONG;
+    params[4].buffer = (char*)&song.year;
+    params[4].length = 0;
+    params[4].is_null = 0;
+
+    params[5].buffer_type = MYSQL_TYPE_STRING;
+    params[5].buffer = (char*)song.songPath.c_str();
+    auto pathLength = song.songPath.size();
+    params[5].length = &pathLength;
+    params[5].is_null = 0;
+
+    params[6].buffer_type = MYSQL_TYPE_LONG;
+    params[6].buffer = (char*)&song.coverArtId;
+    params[6].length = 0;
+    params[6].is_null = 0;
+
+    params[7].buffer_type = MYSQL_TYPE_LONG;
+    params[7].buffer = (char*)&song.artistId;
+    params[7].length = 0;
+    params[7].is_null = 0;
+
+    params[8].buffer_type = MYSQL_TYPE_LONG;
+    params[8].buffer = (char*)&song.albumId;
+    params[8].length = 0;
+    params[8].is_null = 0;
+    
+    params[9].buffer_type = MYSQL_TYPE_LONG;
+    params[9].buffer = (char*)&song.genreId;
+    params[9].length = 0;
+    params[9].is_null = 0;
+
+    params[10].buffer_type = MYSQL_TYPE_LONG;
+    params[10].buffer = (char*)&song.yearId;
+    params[10].length = 0;
+    params[10].is_null = 0;
+
+    params[11].buffer_type = MYSQL_TYPE_LONG;
+    params[11].buffer = (char*)&song.id;
+    params[11].length = 0;
+    params[11].is_null = 0;
+
+    status = mysql_stmt_bind_param(stmt, params);
+    status = mysql_stmt_execute(stmt);
+
+    mysql_stmt_close(stmt);
+    mysql_close(conn);
+
+    std::cout << "updated song record" << std::endl;
+}
+
+
 // TODO: delete this, not being used
 std::vector<model::Song> database::SongRepository::parseRecords(MYSQL_RES* results)
 {

src/manager/AlbumManager.cpp

@@ -53,6 +53,25 @@ void manager::AlbumManager::deleteAlbum(const model::Song& song)
     albRepo.deleteAlbum(album, type::AlbumFilter::id);
 }
 
+void manager::AlbumManager::updateAlbum(model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    model::Album album;
+    album.title = updatedSong.album;
+    album.year = updatedSong.year;
+
+    database::AlbumRepository albRepo(m_bConf);
+    if (!albRepo.doesAlbumExists(album, type::AlbumFilter::title)) {
+        std::cout << "album record does not exist" << std::endl;
+        albRepo.saveAlbum(album);
+    } else {
+        std::cout << "album record already exists" << std::endl;
+    }
+
+    album = albRepo.retrieveRecord(album, type::AlbumFilter::title);
+    updatedSong.albumId = album.id;
+}
+
 void manager::AlbumManager::printAlbum(const model::Album& album)
 {
     std::cout << "\nalbum record" << std::endl;

src/manager/ArtistManager.cpp

@@ -36,6 +36,7 @@ model::Artist manager::ArtistManager::saveArtist(const model::Song& song)
     return artist;
 }
 
+
 void manager::ArtistManager::deleteArtist(const model::Song& song)
 {
     model::Artist artist(song);
@@ -53,6 +54,24 @@ void manager::ArtistManager::deleteArtist(const model::Song& song)
     artRepo.deleteArtist(artist, type::ArtistFilter::id);
 }
 
+void manager::ArtistManager::updateArtist(model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    model::Artist artist;
+    artist.artist = updatedSong.artist;
+
+    database::ArtistRepository artRepo(m_bConf);
+    if (!artRepo.doesArtistExist(artist, type::ArtistFilter::artist)) {
+        std::cout << "artist record does not exist" << std::endl;
+        artRepo.saveRecord(artist);
+    } else {
+        std::cout << "artist record already exists" << std::endl;
+    }
+
+    artist = artRepo.retrieveRecord(artist, type::ArtistFilter::artist);
+    updatedSong.artistId = artist.id;
+}
+
 void manager::ArtistManager::printArtist(const model::Artist& artist)
 {
     std::cout << "\nartist record" << std::endl;

src/manager/CoverArtManager.cpp

@@ -6,6 +6,7 @@
 #include "database/CoverArtRepository.h"
 #include "manager/DirectoryManager.h"
 #include "type/CoverFilter.h"
+#include "type/PathType.h"
 #include "utility/MetadataRetriever.h"
 
 namespace fs = std::filesystem;
@@ -40,6 +41,25 @@ model::Cover manager::CoverArtManager::saveCover(const model::Song& song, std::s
 }
 
 
+std::pair<bool, std::string> manager::CoverArtManager::defaultCover(
+    const model::Cover& cover) {
+
+    auto paths = manager::DirectoryManager::pathConfigContent(m_bConf);
+    const auto coverArtPath = 
+        paths[manager::DirectoryManager::retrievePathType(
+            type::PathType::coverArt)].get<std::string>();
+
+    auto stockCoverArtPath = coverArtPath;
+    stockCoverArtPath.append("CoverArt.png");
+
+    if (stockCoverArtPath.compare(cover.imagePath) == 0) {
+        return std::make_pair(true, coverArtPath);
+    } else {
+        return std::make_pair(false, coverArtPath);
+    }
+}
+
+
 void manager::CoverArtManager::deleteCover(const model::Song& song)
 {
     database::CoverArtRepository covRepo(m_bConf);
@@ -49,18 +69,54 @@ void manager::CoverArtManager::deleteCover(const model::Song& song)
     cov = covRepo.retrieveRecord(cov, type::CoverFilter::id);
     covRepo.deleteRecord(cov);
 
-    auto paths = manager::DirectoryManager::pathConfigContent(m_bConf);
+    auto result = defaultCover(cov);
-
+    if (!result.first) {
-    const auto coverArtPath = paths["cover_root_path"].get<std::string>();
-    std::string stockCoverArtPath = coverArtPath;
-    stockCoverArtPath.append("CoverArt.png");
-
-    if (stockCoverArtPath.compare(cov.imagePath) != 0) {
         fs::remove(cov.imagePath);
         std::cout << "deleting cover art" << std::endl;
+        const auto coverArtPath = result.second;
     } else {
         std::cout << "song contains the stock cover art, will not delete" << std::endl;
     }
 
-    manager::DirectoryManager::deleteDirectories(song, coverArtPath);
+    manager::DirectoryManager::deleteDirectories(song, result.second);
+}
+
+void manager::CoverArtManager::updateCover(const model::Song& updatedSong)
+{
+    database::CoverArtRepository covRepo(m_bConf);
+    model::Cover cover(updatedSong.coverArtId);
+    cover = covRepo.retrieveRecord(cover, type::CoverFilter::id);
+
+    auto result = defaultCover(cover);
+
+    if (result.first) {
+        return;
+    }
+
+    auto imagePath = manager::DirectoryManager::createDirectoryProcess(
+        updatedSong, m_bConf, type::PathType::coverArt);
+    imagePath.append(updatedSong.title);
+    imagePath.append(".png");
+
+    if (cover.imagePath.find(".png") == std::string::npos) {
+        std::cout << "no file extension on image path" << std::endl;
+        cover.imagePath.append(".png");
+    }
+
+    fs::copy(cover.imagePath, imagePath);
+    fs::remove(cover.imagePath);
+}
+
+void manager::CoverArtManager::updateCoverRecord(const model::Song& updatedSong)
+{
+    model::Cover updatedCover(updatedSong);
+    auto updatedImagePath = manager::DirectoryManager::createDirectoryProcess(
+        updatedSong, m_bConf, type::PathType::coverArt);
+    updatedImagePath.append(updatedSong.title);
+
+    updatedCover.imagePath = std::move(updatedImagePath);
+    updatedCover.imagePath.append(".png");
+
+    database::CoverArtRepository covRepo(m_bConf);
+    covRepo.updateRecord(updatedCover);
 }

src/manager/DirectoryManager.cpp

@@ -7,6 +7,7 @@
 
 namespace fs = std::filesystem;
 
+
 std::string manager::DirectoryManager::createDirectoryProcess(model::Song song, const std::string& rootPath)
 {
     auto currPath = fs::path(rootPath);
@@ -37,14 +38,49 @@ std::string manager::DirectoryManager::createDirectoryProcess(model::Song song,
     return albPath.string() + "/";
 }
 
+std::string manager::DirectoryManager::createDirectoryProcess(const model::Song& song, 
+    const model::BinaryPath& bConf, type::PathType pType)
+{
+    auto path = pathConfigContent(bConf)[retrievePathType(pType)];
+    auto rootPath = path.get<std::string>();
+    auto currPath = fs::path(rootPath);
+
+    if (fs::exists(currPath)) {
+        std::cout << "path exists" << std::endl;
+    } else {
+        std::cout << "creating root music path" << std::endl;
+        fs::create_directory(currPath);
+    }
+
+    auto artPath = fs::path(currPath.string() + song.artist);
+    if (fs::exists(artPath)) {
+        std::cout << "artist path exists" << std::endl;
+    } else {
+        std::cout << "creating artist path" << std::endl;
+        fs::create_directory(artPath);
+    }
+
+    auto albPath = fs::path(artPath.string() + "/" + song.album);
+    if (fs::exists(albPath)) { 
+        std::cout << "album path exists" << std::endl;
+    } else {
+        std::cout << "creating album path" << std::endl;
+        fs::create_directory(albPath);
+    }
+
+    return albPath.string() + "/";
+}
+
 std::string manager::DirectoryManager::configPath(std::string_view path)
 {
     return fs::canonical(path).parent_path().string();
 }
+
 std::string manager::DirectoryManager::configPath(const model::BinaryPath& bConf)
 {
     return fs::canonical(bConf.path).parent_path().string();
 }
+
 std::string manager::DirectoryManager::contentOfPath(const std::string& path)
 {
     std::fstream a(path, std::ios::in);
@@ -55,6 +91,29 @@ std::string manager::DirectoryManager::contentOfPath(const std::string& path)
     return s.str();
 }
 
+std::string manager::DirectoryManager::retrievePathType(type::PathType pType)
+{
+    std::string path;
+    switch (pType) {
+        case type::PathType::music:
+            path = "root_music_path";
+            break;
+        case type::PathType::archive:
+            path = "archive_root_path";
+            break;
+        case type::PathType::temp:
+            path = "temp_root_path";
+            break;
+        case type::PathType::coverArt:
+            path = "cover_root_path";
+            break;
+        default:
+            break;
+    }
+
+    return path;
+}
+
 nlohmann::json manager::DirectoryManager::credentialConfigContent(const model::BinaryPath& bConf)
 {
     auto path = configPath(bConf);
@@ -62,6 +121,7 @@ nlohmann::json manager::DirectoryManager::credentialConfigContent(const model::B
 
     return nlohmann::json::parse(contentOfPath(path));
 }
+
 nlohmann::json manager::DirectoryManager::databaseConfigContent(const model::BinaryPath& bConf)
 {
     auto path = configPath(bConf);
@@ -69,6 +129,7 @@ nlohmann::json manager::DirectoryManager::databaseConfigContent(const model::Bin
 
     return nlohmann::json::parse(contentOfPath(path));
 }
+
 nlohmann::json manager::DirectoryManager::pathConfigContent(const model::BinaryPath& bConf)
 {
     auto path = configPath(bConf);
@@ -77,16 +138,6 @@ nlohmann::json manager::DirectoryManager::pathConfigContent(const model::BinaryP
     return nlohmann::json::parse(contentOfPath(path));
 }
 
-void manager::DirectoryManager::deleteCoverArtFile(const std::string& covPath, const std::string& stockCoverPath)
-{
-    if (covPath.compare(stockCoverPath) == 0) {
-        std::cout << "cover has stock cover art, will not deleted" << std::endl;
-    } else {
-        std::cout << "deleting song path" << std::endl;
-        auto cov = fs::path(covPath);
-        fs::remove(cov);
-    }
-}
 void manager::DirectoryManager::deleteDirectories(model::Song song, const std::string& rootPath)
 {
     std::cout << "checking for empty directories to delete" << std::endl;
@@ -112,6 +163,18 @@ void manager::DirectoryManager::deleteDirectories(model::Song song, const std::s
 
     std::cout << "deleted empty directory or directories" << std::endl;
 }
+
+void manager::DirectoryManager::deleteCoverArtFile(const std::string& covPath, const std::string& stockCoverPath)
+{
+    if (covPath.compare(stockCoverPath) == 0) {
+        std::cout << "cover has stock cover art, will not deleted" << std::endl;
+    } else {
+        std::cout << "deleting song path" << std::endl;
+        auto cov = fs::path(covPath);
+        fs::remove(cov);
+    }
+}
+
 void manager::DirectoryManager::deleteSong(const model::Song song)
 {
     std::cout << "deleting song" << std::endl;

src/manager/GenreManager.cpp

@@ -33,6 +33,7 @@ model::Genre manager::GenreManager::saveGenre(const model::Song& song)
     return genre;
 }
 
+
 void manager::GenreManager::deleteGenre(const model::Song& song)
 {
     model::Genre genre(song);
@@ -50,6 +51,24 @@ void manager::GenreManager::deleteGenre(const model::Song& song)
     gnrRepo.deleteRecord(genre, type::GenreFilter::id);
 }
 
+void manager::GenreManager::updateGenre(model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    model::Genre genre;
+    genre.category = updatedSong.genre;
+
+    database::GenreRepository gnrRepo(m_bConf);
+    if (!gnrRepo.doesGenreExist(genre, type::GenreFilter::category)) {
+        std::cout << "genre record does not exist" << std::endl;
+        gnrRepo.saveRecord(genre);
+    } else {
+        std::cout << "genre record already exists" << std::endl;
+    }
+
+    genre = gnrRepo.retrieveRecord(genre, type::GenreFilter::category);
+    updatedSong.genreId = genre.id;
+}
+
 void manager::GenreManager::printGenre(const model::Genre& genre)
 {
     std::cout << "genre record" << std::endl;

src/manager/SongManager.cpp

@@ -16,6 +16,7 @@
 #include "manager/DirectoryManager.h"
 #include "manager/GenreManager.h"
 #include "manager/YearManager.h"
+#include "type/PathType.h"
 #include "utility/MetadataRetriever.h"
 
 namespace fs = std::filesystem;
@@ -32,7 +33,21 @@ manager::SongManager::SongManager(const model::BinaryPath& bConf)
 bool manager::SongManager::didSongChange(const model::Song& updatedSong, 
     const model::Song& currSong)
 {
-    // TODO: implement this
+    if (!updatedSong.title.empty()) {
+        return true;
+    }
+    if (!updatedSong.artist.empty()) {
+        return true;
+    }
+    if (!updatedSong.album.empty()) {
+        return true;
+    }
+    if (updatedSong.genre.empty()) {
+        return true;
+    }
+    if (updatedSong.year != 0) {
+        return true;
+    }
 
     return false;
 }
@@ -53,6 +68,7 @@ bool manager::SongManager::requiresFilesystemChange(const model::Song& updatedSo
     return false;
 }
 
+
 void manager::SongManager::saveSong(model::Song& song)
 {
     saveSongTemp(song);
@@ -102,17 +118,27 @@ void manager::SongManager::updateSong(model::Song& updatedSong)
     OATPP_ASSERT_HTTP(songRepo.doesSongExist(currSong, type::SongFilter::id) , oatpp::web::protocol::http::Status::CODE_404, "song does not exist");
 
     currSong = songRepo.retrieveRecord(currSong, type::SongFilter::id);
+    if (!didSongChange(updatedSong, currSong)) {
+        std::cout << "no change to the song" << std::endl;
+        return;
+    }
+
+    assignMiscId(updatedSong, currSong);
+
+    auto changes = changesInSong(updatedSong, currSong);
+
     utility::MetadataRetriever meta;
     meta.updateMetadata(updatedSong, currSong);
+    assignMiscFields(changes, updatedSong, currSong);
 
-    // TODO: 
-    // 1. determine if the song has been updated at all
-    // 2. depending on what metadata was changed there might be a need to
-    // change where the song is stored on the filesystem, deleting empty
-    // directories in the process
-    // 3. create or delete necessary records
     if (requiresFilesystemChange(updatedSong, currSong)) {
+        modifySongOnFilesystem(updatedSong, currSong);
     }
+
+    printSong(updatedSong);
+    printSong(currSong);
+
+    updateMisc(changes, updatedSong, currSong);
 }
 
 model::Song manager::SongManager::songDtoConv(dto::SongDto::ObjectWrapper& songDto)
@@ -150,6 +176,90 @@ void manager::SongManager::printSong(const model::Song& song)
     std::cout << "year id: " << song.yearId << std::endl;
 }
 
+
+std::map<type::SongChanged, bool> manager::SongManager::changesInSong(
+    const model::Song& updatedSong, const model::Song& currSong)
+{
+    std::map<type::SongChanged, bool> songChanges;
+
+    std::string_view updatedTitle = updatedSong.title;
+    std::string_view updatedArtist = updatedSong.artist;
+    std::string_view updatedAlbum = updatedSong.album;
+    std::string_view updatedGenre = updatedSong.genre;
+
+    songChanges[type::SongChanged::title] = 
+        (currSong.title.compare(updatedTitle) != 0 && 
+         updatedTitle.size() > 0) ? true : false;
+
+    songChanges[type::SongChanged::artist] = 
+        (currSong.artist.compare(updatedArtist) != 0 && 
+         updatedArtist.size() > 0) ? true : false;
+
+    songChanges[type::SongChanged::album] = 
+        (currSong.album.compare(updatedAlbum) != 0 && 
+         updatedAlbum.size() > 0) ? true : false;
+
+    songChanges[type::SongChanged::genre] = 
+        (currSong.genre.compare(updatedGenre) != 0 && 
+         updatedGenre.size() > 0) ? true : false;
+
+    songChanges[type::SongChanged::year] =
+        (updatedSong.year != 0) ? true : false;
+
+    return songChanges;
+}
+
+
+// used to prevent empty values to appear in the updated song
+void manager::SongManager::assignMiscFields(
+    std::map<type::SongChanged, bool>& songChanges, model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    std::cout << "assigning miscellanes fields to updated song" << std::endl;
+    for (auto scIter = songChanges.begin(); scIter != songChanges.end(); ++scIter) {
+        type::SongChanged key = scIter->first;
+        bool changed = songChanges.at(key);
+
+        if (!changed) {
+            switch (key) {
+                case type::SongChanged::title:
+                    updatedSong.title = currSong.title;
+                    std::cout << "title has not been changed" << std::endl;
+                    break;
+                case type::SongChanged::artist:
+                    updatedSong.artist = currSong.artist;
+                    std::cout << "artist has not been changed" << std::endl;
+                    break;
+                case type::SongChanged::album:
+                    updatedSong.album = currSong.album;
+                    std::cout << "album has not been changed" << std::endl;
+                    break;
+                case type::SongChanged::genre:
+                    updatedSong.genre = currSong.genre;
+                    std::cout << "genre has not been changed" << std::endl;
+                    break;
+                case::type::SongChanged::year:
+                    updatedSong.year = currSong.year;
+                    std::cout << "year has not been changed" << std::endl;
+                default:
+                    break;
+            }
+        }
+    }
+}
+
+// used to dump miscellaneous id to the updated song
+void manager::SongManager::assignMiscId(model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    std::cout << "assigning miscellaneous Id's to updated song" << std::endl;
+    updatedSong.artistId = currSong.artistId;
+    updatedSong.albumId = currSong.albumId;
+    updatedSong.genreId = currSong.genreId;
+    updatedSong.yearId = currSong.yearId;
+    updatedSong.coverArtId = currSong.coverArtId;
+}
+
 void manager::SongManager::saveSongTemp(model::Song& song)
 {
     auto config = manager::DirectoryManager::pathConfigContent(m_bConf);
@@ -240,3 +350,60 @@ void manager::SongManager::deleteMisc(const model::Song& song)
     manager::YearManager yrMgr(m_bConf);
     yrMgr.deleteYear(song);
 }
+
+void manager::SongManager::updateMisc(
+    const std::map<type::SongChanged, bool>& songChanges,
+    model::Song& updatedSong, const model::Song& currSong)
+{
+    auto titleChange = songChanges.at(type::SongChanged::title);
+    auto artistChange = songChanges.at(type::SongChanged::artist);
+    auto albumChange = songChanges.at(type::SongChanged::album);
+    auto genreChange = songChanges.at(type::SongChanged::genre);
+    auto yearChange = songChanges.at(type::SongChanged::year);
+
+    if (artistChange) {
+        manager::ArtistManager artMgr(m_bConf);
+        artMgr.updateArtist(updatedSong, currSong);
+    }
+    if (albumChange) {
+        manager::AlbumManager albMgr(m_bConf);
+        albMgr.updateAlbum(updatedSong, currSong);
+    }
+    if (genreChange) {
+        manager::GenreManager gnrMgr(m_bConf);
+        gnrMgr.updateGenre(updatedSong, currSong);
+    }
+    if (yearChange) {
+        manager::YearManager yrMgr(m_bConf);
+        yrMgr.updateYear(updatedSong, currSong);
+    }
+
+    // determins to update the cover art record
+    if (titleChange || artistChange || albumChange) {
+        manager::CoverArtManager covMgr(m_bConf);
+        covMgr.updateCoverRecord(updatedSong);
+    }
+
+    database::SongRepository songRepo(m_bConf);
+    songRepo.updateRecord(updatedSong);
+}
+
+void manager::SongManager::modifySongOnFilesystem(model::Song& updatedSong, 
+    const model::Song& currSong)
+{
+    std::cout << "preparing to modify song" << std::endl;
+    printSong(updatedSong);
+    auto songPath = manager::DirectoryManager::createDirectoryProcess(
+        updatedSong, m_bConf, type::PathType::music);
+    songPath.append(updatedSong.title);
+    songPath.append(".mp3");
+    updatedSong.songPath = std::move(songPath);
+
+    std::cout << "new path " << updatedSong.songPath << std::endl;
+
+    fs::copy(currSong.songPath, updatedSong.songPath);
+    fs::remove(currSong.songPath);
+
+    manager::CoverArtManager covMgr(m_bConf);
+    covMgr.updateCover(updatedSong);
+}

src/manager/YearManager.cpp

@@ -50,6 +50,24 @@ void manager::YearManager::deleteYear(const model::Song& song)
     yrRepo.deleteYear(year, type::YearFilter::id);
 }
 
+void manager::YearManager::updateYear(model::Song& updatedSong,
+    const model::Song& currSong)
+{
+    model::Year year;
+    year.year = updatedSong.year;
+
+    database::YearRepository albRepo(m_bConf);
+    if (!albRepo.doesYearExist(year, type::YearFilter::year)) {
+        std::cout << "year record does not exist" << std::endl;
+        albRepo.saveRecord(year);
+    } else {
+        std::cout << "year record already exists" << std::endl;
+    }
+
+    year = albRepo.retrieveRecord(year, type::YearFilter::year);
+    updatedSong.yearId = year.id;
+}
+
 void manager::YearManager::printYear(const model::Year& year)
 {
     std::cout << "\nyear record" << std::endl;