From 2b592b4986b92c85150ecb9d08a521e6391cc160 Mon Sep 17 00:00:00 2001
From: manthole <67294267+manthole@users.noreply.github.com>
Date: Sun, 27 Jun 2021 23:10:38 +0200
Subject: Add new feature - display playlist

---
 src/main/java/musichub/business/MusicHub.java   |  28 ++++++++++++++++++++++++
 src/main/java/musichub/main/Main.java           |  18 +++++++++++++++
 target/classes/musichub/business/MusicHub.class | Bin 12507 -> 13297 bytes
 target/classes/musichub/main/Main.class         | Bin 10828 -> 11373 bytes
 target/classes/musichub/util/Policy.class       | Bin 10981 -> 10860 bytes
 5 files changed, 46 insertions(+)

diff --git a/src/main/java/musichub/business/MusicHub.java b/src/main/java/musichub/business/MusicHub.java
index 660f0f8..f6805b6 100644
--- a/src/main/java/musichub/business/MusicHub.java
+++ b/src/main/java/musichub/business/MusicHub.java
@@ -359,5 +359,33 @@ public class MusicHub {
             this.getAudioElement(searchResult, searchResult.get(0).getTitle());
         }
     }
+    public String getPlayListsTitles() {
+        StringBuilder titleList = new StringBuilder();
 
+        for (PlayList pl : playlists)
+            titleList.append(pl.getTitle()).append("\n");
+        return titleList.toString();
+    }
+
+    public List<AudioElement> getPlayListSongs(String playListTitle) throws NoPlayListFoundException {
+        PlayList thePlayList = null;
+        ArrayList<AudioElement> songsInPlayList = new ArrayList<>();
+        for (PlayList pl : playlists) {
+            if (pl.getTitle().equalsIgnoreCase(playListTitle)) {
+                thePlayList = pl;
+                break;
+            }
+        }
+        if (thePlayList == null) throw new NoPlayListFoundException("No playlist with this title in the MusicHub!");
+
+        List<UUID> songIDs = thePlayList.getElements();
+        for (UUID id : songIDs)
+            for (AudioElement el : elements) {
+                if (el instanceof Song) {
+                    if (el.getUUID().equals(id)) songsInPlayList.add(el);
+                }
+            }
+        return songsInPlayList;
+
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/musichub/main/Main.java b/src/main/java/musichub/main/Main.java
index bbcae79..2394ce6 100644
--- a/src/main/java/musichub/main/Main.java
+++ b/src/main/java/musichub/main/Main.java
@@ -264,6 +264,23 @@ public class Main {
                     System.out.println("Type h for available commands");
                     choice = scan.nextLine();
                     break;
+                case 'm':
+                    //songs of a playlist
+                    System.out.println("Songs of a playlist will be displayed; enter the playlist name, available playlists are:");
+                    System.out.println(theHub.getPlayListsTitles());
+
+                    playListTitle = scan.nextLine();
+                    try {
+                        List<AudioElement> songs = theHub.getPlayListSongs(playListTitle);
+                        System.out.println(theHub.getPlayListSongs(playListTitle));
+                        String song = scan.nextLine();
+                        theHub.getAudioElement(songs, song);
+                    } catch (NoPlayListFoundException ex) {
+                        System.out.println("No playlist found with the requested title " + ex.getMessage());
+                    }
+                    printAvailableCommands();
+                    choice = scan.nextLine();
+                    break;
                 default:
 
                     break;
@@ -283,6 +300,7 @@ public class Main {
         System.out.println("+: add a song to an album");
         System.out.println("l: add a new audiobook");
         System.out.println("p: create a new playlist from existing songs and audio books");
+        System.out.println("m: display songs of a playlist");
         System.out.println("-: delete an existing playlist");
         System.out.println("s: save elements, albums, playlists");
         System.out.println("o: consult the app logs");
diff --git a/target/classes/musichub/business/MusicHub.class b/target/classes/musichub/business/MusicHub.class
index 8614d25..42d7480 100644
Binary files a/target/classes/musichub/business/MusicHub.class and b/target/classes/musichub/business/MusicHub.class differ
diff --git a/target/classes/musichub/main/Main.class b/target/classes/musichub/main/Main.class
index 6a37d2d..d1f8ea2 100644
Binary files a/target/classes/musichub/main/Main.class and b/target/classes/musichub/main/Main.class differ
diff --git a/target/classes/musichub/util/Policy.class b/target/classes/musichub/util/Policy.class
index bec4189..4bf6b23 100644
Binary files a/target/classes/musichub/util/Policy.class and b/target/classes/musichub/util/Policy.class differ
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