/// <summary>
/// Passes in a song
/// checks file for it song id mapped to song title and artist
/// returns the songid
/// more unique selection poor performance
/// </summary>
///
public static async Task <int> GetSongIDFromFileAsync(Model.Song song)
{
int songID = -1;
StorageFolder sFolder = ApplicationData.Current.LocalFolder;
StorageFile sFile = await sFolder.CreateFileAsync(FILE_NAME2, CreationCollisionOption.OpenIfExists);
//checks if song title and artist is already in SongStorage.txt file
var slines = await FileIO.ReadLinesAsync(sFile);
//searches for songs, if it find it add it into a dictionary
foreach (var sline in slines)
{
if (sline != "")
{
var check = sline.Split(',');
if (check[0] == song.Title)
{
songID = Convert.ToInt32(check[1]);
}
}
}
//when called in main view model must check if it is -1, means song does not have id
return(songID);
}
/// <summary>
/// Gets all songs from a text file in local storage called SongStorage.txt
/// </summary>
/// <returns>collection of Songs</returns>
public static async Task <ICollection <Model.Song> > GetSongsAsync()
{
List <Model.Song> songs = new List <Model.Song>();
StorageFolder folder = ApplicationData.Current.LocalFolder;
StorageFile songFile = await folder.GetFileAsync(FILE_NAME);
var lines = await FileIO.ReadLinesAsync(songFile);
foreach (var line in lines)
{
var songData = line.Split(',');
var song = new Model.Song();
song.Title = songData[0];
song.Artist = songData[1];
song.Album = songData[2];
song.CoverImagePath = songData[3];
song.AudioFilePath = songData[4];
song.Genre = (Model.Genre)Enum.Parse(typeof(Model.Genre), songData[5]);
songs.Add(song);
}
return(songs);
}
/// <summary>
/// Write a song with its song title , artist and assigned ID into txt file in local storage
/// checks to see if song exist before adding in this collection
/// </summary>
/// <param name="song">the song you want to save</param>
public static async void WriteSongToFileAsync(Model.Song song)
{
StorageFolder sFolder = ApplicationData.Current.LocalFolder;
StorageFile sFile = await sFolder.CreateFileAsync(FILE_NAME2, CreationCollisionOption.OpenIfExists);
//checks if song title and artist is already in SongStorage.txt file
var slines = await FileIO.ReadLinesAsync(sFile);
bool exist = false;
foreach (var sline in slines)
{
if (sline != "")
{
var check = sline.Split(',');
if (check[0] == song.Title)
{
exist = true;
}
}
}
if (exist == false)
{
// create song data and add into SongStorage.txt file
var sData = $"{song.Title},";
sData = sData + $"{song.ID.ToString()},";
sData = sData + Environment.NewLine;
await FileIO.AppendTextAsync(sFile, sData);
}
}
/// <summary>
/// Appends a song to the end of a txt file in local storage storing all
/// songs in the collection
/// </summary>
/// <param name="song">the song you want to save</param>
public static async void WriteSongToFileAsync(Model.Song song)
{
StorageFolder localFolder = ApplicationData.Current.LocalFolder;
StorageFile songFile = await localFolder.CreateFileAsync(FILE_NAME, CreationCollisionOption.OpenIfExists);
var songData = $"{song.Title},{song.Artist},{song.Album},{song.CoverImagePath}{song.AudioFilePath},{song.Genre}" + Environment.NewLine;
await FileIO.AppendTextAsync(songFile, songData);
}