Add All Songs fragment

Add an All Songs fragment, also modify the ViewPager structure.

app/src/main/java/org/oxycblt/auxio/MainFragment.kt

@@ -1,6 +1,7 @@
 package org.oxycblt.auxio
 
 import android.os.Bundle
+import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -10,12 +11,22 @@ import androidx.fragment.app.FragmentActivity
 import androidx.viewpager2.adapter.FragmentStateAdapter
 import org.oxycblt.auxio.databinding.FragmentMainBinding
 import org.oxycblt.auxio.library.LibraryFragment
-
-// TODO: Placeholder, page count will be dynamic
-private const val PAGES = 1
+import org.oxycblt.auxio.songs.SongsFragment
 
 class MainFragment : Fragment() {
 
+    private val shownFragments = listOf(
+        0, 1
+    )
+
+    private val libraryFragment: LibraryFragment by lazy {
+        LibraryFragment()
+    }
+
+    private val songsFragment: SongsFragment by lazy {
+        SongsFragment()
+    }
+
     override fun onCreateView(
         inflater: LayoutInflater,
         container: ViewGroup?,
@@ -28,15 +39,35 @@ class MainFragment : Fragment() {
         val adapter = FragmentAdapter(requireActivity())
         binding.viewPager.adapter = adapter
 
+        Log.d(this::class.simpleName, "Fragment Created.")
+
         return binding.root
     }
-}
 
-class FragmentAdapter(activity: FragmentActivity) : FragmentStateAdapter(activity) {
-    override fun getItemCount(): Int = PAGES
+    private fun getFragment(pos: Int): Fragment {
+        if (shownFragments.contains(pos)) {
+            return when (pos) {
+                0 -> libraryFragment
+                1 -> songsFragment
 
-    override fun createFragment(position: Int): Fragment {
-        // TODO: Also placeholder, remove when there are other fragments than just library
-        return LibraryFragment()
+                else -> libraryFragment
+            }
+        }
+
+        // Not sure how this would happen but it might
+        Log.e(
+            this::class.simpleName,
+            "Something went terribly wrong while swapping fragments, Substituting with libraryFragment."
+        )
+
+        return libraryFragment
+    }
+
+    inner class FragmentAdapter(activity: FragmentActivity) : FragmentStateAdapter(activity) {
+        override fun getItemCount(): Int = shownFragments.size
+
+        override fun createFragment(position: Int): Fragment {
+            return getFragment(position)
+        }
     }
 }

app/src/main/java/org/oxycblt/auxio/library/LibraryViewModel.kt

@@ -8,7 +8,7 @@ import org.oxycblt.auxio.music.MusicRepository
 import org.oxycblt.auxio.music.models.Album
 import org.oxycblt.auxio.music.models.Artist
 
-class LibraryViewModel() : ViewModel() {
+class LibraryViewModel : ViewModel() {
 
     private val mArtists = MutableLiveData<List<Artist>>()
     private var mAlbums = MutableLiveData<List<Album>>()

app/src/main/java/org/oxycblt/auxio/music/MusicUtils.kt

@@ -3,6 +3,11 @@ package org.oxycblt.auxio.music
 import android.content.ContentUris
 import android.net.Uri
 import android.provider.MediaStore
+import android.widget.TextView
+import androidx.databinding.BindingAdapter
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.music.models.Album
+import org.oxycblt.auxio.music.models.Song
 
 private val ID3_GENRES = arrayOf<String>(
     "Blues", "Classic Rock", "Country", "Dance", "Disco", "Funk", "Grunge", "Hip-Hop", "Jazz",
@@ -41,6 +46,7 @@ fun String.toNamedGenre(): String {
     return ID3_GENRES.getOrNull(intGenre) ?: ""
 }
 
+// Convert a song to its URI
 fun Long.toURI(): Uri {
     return ContentUris.withAppendedId(
         MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
@@ -48,9 +54,30 @@ fun Long.toURI(): Uri {
     )
 }
 
+// Convert an albums ID into its album art URI
 fun Long.toAlbumArtURI(): Uri {
     return ContentUris.withAppendedId(
         Uri.parse("content://media/external/audio/albumart"),
         this
     )
 }
+
+// Format the amount of songs in an album
+@BindingAdapter("songCount")
+fun TextView.getAlbumSongs(album: Album) {
+    text = if (album.numSongs < 2) {
+        context.getString(R.string.label_single_song)
+    } else {
+        context.getString(R.string.format_multi_song_count, album.numSongs.toString())
+    }
+}
+
+// Format the artist/album data for a song
+@BindingAdapter("songData")
+fun TextView.getSongData(song: Song) {
+    text = context.getString(
+        R.string.format_song_data,
+        song.album.artist.name,
+        song.album.title
+    )
+}

app/src/main/java/org/oxycblt/auxio/music/processing/MusicSorter.kt

@@ -24,8 +24,11 @@ class MusicSorter(
             // Find all songs that match the current album title
             val albumSongs = songs.filter { it.albumName == album.title }
 
-            // Then add them to the album, along with refreshing the cover
-            album.songs.addAll(albumSongs)
+            // Then add them to the album
+            for (song in albumSongs) {
+                song.album = album
+                album.songs.add(song)
+            }
 
             unknownSongs.removeAll(albumSongs)
         }
@@ -36,13 +39,13 @@ class MusicSorter(
             // Reuse an existing unknown album if one is found
             val unknownAlbum = albums.find { it.title == "" } ?: Album()
 
-            unknownAlbum.songs.addAll(unknownSongs)
-            unknownAlbum.numSongs = unknownAlbum.songs.size
-
             for (song in unknownSongs) {
                 song.album = unknownAlbum
+                unknownAlbum.songs.add(song)
             }
 
+            unknownAlbum.numSongs = unknownAlbum.songs.size
+
             albums.add(unknownAlbum)
 
             Log.d(
@@ -61,8 +64,12 @@ class MusicSorter(
             // Find all albums that match the current artist name
             val artistAlbums = albums.filter { it.artistName == artist.name }
 
-            // And then add them to the album, along with refreshing the amount of albums
-            artist.albums.addAll(artistAlbums)
+            // Then add them to the artist, along with refreshing the amount of albums
+            for (album in artistAlbums) {
+                album.artist = artist
+                artist.albums.add(album)
+            }
+
             artist.numAlbums = artist.albums.size
 
             unknownAlbums.removeAll(artistAlbums)
@@ -74,14 +81,12 @@ class MusicSorter(
             // Reuse an existing unknown artist if one is found
             val unknownArtist = artists.find { it.name == "" } ?: Artist()
 
-            unknownArtist.albums.addAll(unknownAlbums)
-            unknownArtist.numAlbums = albums.size
-
             for (album in unknownAlbums) {
                 album.artist = unknownArtist
+                unknownArtist.albums.add(album)
             }
 
-            artists.add(unknownArtist)
+            unknownArtist.numAlbums = albums.size
 
             Log.d(
                 this::class.simpleName,

app/src/main/java/org/oxycblt/auxio/recycler/RecyclerUtils.kt

@@ -1,24 +1,12 @@
 package org.oxycblt.auxio.recycler
 
 import android.graphics.drawable.ColorDrawable
-import android.widget.TextView
 import androidx.appcompat.app.AppCompatDelegate
 import androidx.core.content.ContextCompat
 import androidx.core.graphics.ColorUtils
-import androidx.databinding.BindingAdapter
 import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.RecyclerView
 import org.oxycblt.auxio.R
-import org.oxycblt.auxio.music.models.Album
-
-@BindingAdapter("songCount")
-fun TextView.numSongsToText(album: Album) {
-    text = if (album.numSongs < 2) {
-        context.getString(R.string.label_single_song)
-    } else {
-        context.getString(R.string.format_multi_song_count, album.numSongs.toString())
-    }
-}
 
 // Apply a custom vertical divider
 fun RecyclerView.applyDivider() {

app/src/main/java/org/oxycblt/auxio/recycler/SongViewHolder.kt

@@ -0,0 +1,26 @@
+package org.oxycblt.auxio.recycler
+
+import androidx.recyclerview.widget.RecyclerView
+import coil.load
+import org.oxycblt.auxio.databinding.SongItemBinding
+import org.oxycblt.auxio.music.models.Song
+
+// Generic ViewHolder for a song
+class SongViewHolder(
+    private var binding: SongItemBinding
+) : RecyclerView.ViewHolder(binding.root) {
+
+    // Bind the view w/new data
+    fun bind(song: Song) {
+        binding.song = song
+
+        // Load the album cover
+        binding.cover.load(song.album.coverUri) {
+            crossfade(true)
+            placeholder(android.R.color.transparent)
+            error(android.R.color.transparent)
+        }
+
+        binding.executePendingBindings()
+    }
+}

app/src/main/java/org/oxycblt/auxio/songs/SongDataAdapter.kt

@@ -0,0 +1,40 @@
+package org.oxycblt.auxio.songs
+
+import android.view.LayoutInflater
+import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
+import org.oxycblt.auxio.databinding.SongItemBinding
+import org.oxycblt.auxio.music.models.Song
+import org.oxycblt.auxio.recycler.SongViewHolder
+
+class SongDataAdapter : ListAdapter<Song, SongViewHolder>(DiffCallback) {
+
+    var data = listOf<Song>()
+        set(newData) {
+            field = newData
+            submitList(data)
+        }
+
+    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SongViewHolder {
+        return SongViewHolder(
+            SongItemBinding.inflate(LayoutInflater.from(parent.context))
+        )
+    }
+
+    override fun onBindViewHolder(holder: SongViewHolder, position: Int) {
+        val Song = getItem(position)
+
+        holder.bind(Song)
+    }
+
+    companion object DiffCallback : DiffUtil.ItemCallback<Song>() {
+        override fun areItemsTheSame(oldItem: Song, newItem: Song): Boolean {
+            return oldItem == newItem
+        }
+
+        override fun areContentsTheSame(oldItem: Song, newItem: Song): Boolean {
+            return oldItem.id == newItem.id
+        }
+    }
+}

app/src/main/java/org/oxycblt/auxio/songs/SongsFragment.kt

@@ -0,0 +1,45 @@
+package org.oxycblt.auxio.songs
+
+import android.os.Bundle
+import android.util.Log
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import androidx.databinding.DataBindingUtil
+import androidx.fragment.app.Fragment
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModelProvider
+import org.oxycblt.auxio.R
+import org.oxycblt.auxio.databinding.FragmentSongsBinding
+import org.oxycblt.auxio.recycler.applyDivider
+
+class SongsFragment : Fragment() {
+    private val songsModel: SongsViewModel by lazy {
+        ViewModelProvider(this).get(SongsViewModel::class.java)
+    }
+
+    override fun onCreateView(
+        inflater: LayoutInflater,
+        container: ViewGroup?,
+        savedInstanceState: Bundle?
+    ): View? {
+        val binding = DataBindingUtil.inflate<FragmentSongsBinding>(
+            inflater, R.layout.fragment_songs, container, false
+        )
+
+        val adapter = SongDataAdapter()
+        binding.songRecycler.adapter = adapter
+        binding.songRecycler.applyDivider()
+
+        songsModel.songs.observe(
+            viewLifecycleOwner,
+            Observer {
+                adapter.data = it
+            }
+        )
+
+        Log.d(this::class.simpleName, "Fragment created.")
+
+        return binding.root
+    }
+}

app/src/main/java/org/oxycblt/auxio/songs/SongsViewModel.kt

@@ -0,0 +1,22 @@
+package org.oxycblt.auxio.songs
+
+import android.util.Log
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import androidx.lifecycle.ViewModel
+import org.oxycblt.auxio.music.MusicRepository
+import org.oxycblt.auxio.music.models.Song
+
+class SongsViewModel : ViewModel() {
+
+    private val mSongs = MutableLiveData<List<Song>>()
+    val songs: LiveData<List<Song>> get() = mSongs
+
+    init {
+        val repo = MusicRepository.getInstance()
+
+        mSongs.value = repo.songs
+
+        Log.d(this::class.simpleName, "ViewModel created.")
+    }
+}

app/src/main/res/layout/album_item.xml

@@ -53,7 +53,7 @@
             app:layout_constraintStart_toEndOf="@+id/cover"
             app:layout_constraintTop_toBottomOf="@+id/album_name"
             app:songCount="@{album}"
-            tools:text="@string/tools_song_count" />
+            tools:text="10 Songs" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>
 </layout>

app/src/main/res/layout/fragment_library.xml

@@ -3,9 +3,10 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
-    <androidx.constraintlayout.widget.ConstraintLayout
+    <LinearLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:orientation="vertical">
 
         <androidx.appcompat.widget.Toolbar
             android:id="@+id/toolbar"
@@ -19,14 +20,11 @@
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/library_recycler"
-            android:layout_width="0dp"
+            android:layout_width="match_parent"
             android:layout_height="0dp"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@+id/toolbar"
+            android:layout_weight="1"
             app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
             tools:listitem="@layout/album_item" />
 
-    </androidx.constraintlayout.widget.ConstraintLayout>
+    </LinearLayout>
 </layout>

app/src/main/res/layout/fragment_loading.xml

@@ -3,6 +3,8 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:android="http://schemas.android.com/apk/res/android">
 
+    <!-- TODO: Add Animation -->
+
     <data>
 
         <variable
@@ -33,12 +35,14 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:fontFamily="@font/inter"
+            android:textAppearance="?android:attr/textAppearanceSmall"
+            android:textColor="?android:attr/textColorPrimary"
             app:layout_constraintBottom_toTopOf="@+id/reset_button"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintHorizontal_bias="0.5"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@+id/loading_bar"
-            tools:text="@string/error_music_load_failed" />
+            tools:text="Some kind of error." />
 
         <Button
             android:id="@+id/reset_button"

app/src/main/res/layout/fragment_songs.xml

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?android:attr/actionBarSize"
+            android:background="?android:attr/windowBackground"
+            android:elevation="@dimen/elevation_normal"
+            app:titleTextAppearance="@style/ToolbarStyle"
+            app:layout_constraintTop_toTopOf="parent"
+            app:title="@string/title_all_songs" />
+
+        <androidx.recyclerview.widget.RecyclerView
+            android:id="@+id/song_recycler"
+            android:layout_width="match_parent"
+            android:layout_height="0dp"
+            android:layout_weight="1"
+            app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
+            tools:listitem="@layout/song_item" />
+
+    </LinearLayout>
+</layout>

app/src/main/res/layout/song_item.xml

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layout xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+
+    <data>
+
+        <variable
+            name="song"
+            type="org.oxycblt.auxio.music.models.Song" />
+    </data>
+
+    <androidx.constraintlayout.widget.ConstraintLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="@dimen/padding_medium">
+
+        <ImageView
+            android:id="@+id/cover"
+            android:layout_width="@dimen/cover_size_compact"
+            android:layout_height="@dimen/cover_size_compact"
+            android:contentDescription="@{@string/description_cover_art + song.album.title}"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintEnd_toEndOf="parent"
+            app:layout_constraintHorizontal_bias="0.0"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent"
+            tools:src="@tools:sample/backgrounds/scenic"
+            tools:srcCompat="@tools:sample/backgrounds/scenic" />
+
+        <TextView
+            android:id="@+id/album_name"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_medium"
+            android:text="@{song.title}"
+            android:textAppearance="?android:attr/textAppearanceListItem"
+            android:textColor="?android:attr/textColorPrimary"
+            app:layout_constraintBottom_toTopOf="@+id/song_count"
+            app:layout_constraintStart_toEndOf="@+id/cover"
+            app:layout_constraintTop_toTopOf="parent"
+            app:layout_constraintVertical_chainStyle="packed"
+            tools:text="Song Name" />
+
+        <TextView
+            android:id="@+id/song_count"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="@dimen/margin_medium"
+            android:textAppearance="?android:attr/textAppearanceListItemSecondary"
+            android:textColor="?android:attr/textColorSecondary"
+            app:layout_constraintBottom_toBottomOf="parent"
+            app:layout_constraintStart_toEndOf="@+id/cover"
+            app:layout_constraintTop_toBottomOf="@+id/album_name"
+            app:songData="@{song}"
+            tools:text="Artist / Album" />
+
+    </androidx.constraintlayout.widget.ConstraintLayout>
+</layout>

app/src/main/res/values/strings.xml

@@ -9,10 +9,10 @@
     <string name="label_single_song">1 Song</string>
 
     <string name="format_multi_song_count">%s Songs</string>
+    <string name="format_song_data">%s / %s</string>
 
-    <string name="title_library_fragment"><b>Library</b></string>
+    <string name="title_library_fragment">Library</string>
+    <string name="title_all_songs">All Songs</string>
 
     <string name="description_cover_art">Cover art for </string>
-
-    <string name="tools_song_count">10 Songs</string>
 </resources>