From 61768eade51a08d0036156a05bd83311dc1b6299 Mon Sep 17 00:00:00 2001
From: Clyhtsuriva <aimeric@adjutor.xyz>
Date: Mon, 28 Dec 2020 13:33:43 +0100
Subject: Added method to display albums sorted by genre

---
 Album.java     |  6 +++++-
 jMusicHub.java | 32 ++++++++++++++++++++++++++++----
 2 files changed, 33 insertions(+), 5 deletions(-)

diff --git a/Album.java b/Album.java
index e2de48f..e457e72 100644
--- a/Album.java
+++ b/Album.java
@@ -33,7 +33,11 @@ public class Album implements Serializable {
 		}
 
 	}
-
+	public String getGenre(){ //used for AG
+		Song firstSong=this.songs.get(0);
+		String firstSongGenre = firstSong.getGenre();
+		return firstSongGenre;
+	};
 
 	public void setId(int id){this.id=id;}
 	public void setTitle(){this.title=title;}
diff --git a/jMusicHub.java b/jMusicHub.java
index cd3d3eb..8feab62 100644
--- a/jMusicHub.java
+++ b/jMusicHub.java
@@ -2,8 +2,6 @@ import java.util.*;
 import java.io.*;
 import java.text.*;
 /* TO DO :
- * Printing album sorted by date of release
- * Printing album sorted by its songs genre
  * Printing audiobooks sorted by author
  * Generating the javadoc
  * Doing the UML Diagramm
@@ -365,6 +363,29 @@ public class jMusicHub {
 		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");}
 	}
 
+public static void listAlbumsByGenre(){
+		String filename = "albums";
+		try {
+			// Reading the object from a file
+			FileInputStream file = new FileInputStream(filename);
+			ObjectInputStream in = new ObjectInputStream(file);
+
+			@SuppressWarnings("unchecked")
+			ArrayList<Album> albums = (ArrayList<Album>)in.readObject();
+			in.close();
+			file.close();
+
+			Collections.sort(albums, Comparator.comparing(Album::getGenre));
+
+			System.out.println("\nSaved "+filename+", sorted by name :\n");
+			for (Album a : albums ){
+				System.out.println(a);
+			}
+		}
+		catch (IOException ex) {System.out.println(filename+ " file missing.");}
+		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");}
+	}
+
 /**<h2>extract</h2>
  * Extract is used to print the content of the files and put them in the ArrayList used to add elements.
  * @param String filename
@@ -557,7 +578,7 @@ public class jMusicHub {
 			switch(userInput) {
 
 				case "h" : //page help
-					System.out.printf("c: add a new song\na: add a new album\n+: add an existing song to an album\nl: add a new audiobook\n\np: create a new playlist from existing songs and audiobooks\n-: delete a playlist\n\ns: save playlists, albums, songs and audiobooks into the concerned files\n\nS: List all your saved songs\nB: List all your saved audiobooks\nA: List all your saved albums\nP: List all your saved playlists\n\nPS: Print playlists sorted by their name\nPC: Print the content of a playlist\nAD: Print albums sorted by their date of release\nAC: Print the content of an album\n\nh: print this help screen\nq: quit the program\n");
+					System.out.printf("c: add a new song\na: add a new album\n+: add an existing song to an album\nl: add a new audiobook\n\np: create a new playlist from existing songs and audiobooks\n-: delete a playlist\n\ns: save playlists, albums, songs and audiobooks into the concerned files\n\nS: List all your saved songs\nB: List all your saved audiobooks\nA: List all your saved albums\nP: List all your saved playlists\n\nPS: Print playlists sorted by their name\nPC: Print the content of a playlist\nAD: Print albums sorted by their date of release\nAG: Print albums sorted by their genre\nAC: Print the content of an album\n\nh: print this help screen\nq: quit the program\n");
 					break;
 
 				case "q" : //quit
@@ -687,9 +708,12 @@ public class jMusicHub {
 				case "PC": //display content of a chosen playlist
 					contentOfPlaylist(playlists);
 					break;
-				case "AD" :
+				case "AD" : // albums sorted by date
 					listAlbumsByDate();
 					break;
+				case "AG" : //albums sorted by genre
+					listAlbumsByGenre();
+					break;
 				case "AC": //display content of a chosen album
 					contentOfAlbum(albums);
 					break;
-- 
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