Songs sharing

app/src/main/java/org/oxycblt/auxio/list/ListFragment.kt

@@ -32,6 +32,7 @@ import org.oxycblt.auxio.music.*
 import org.oxycblt.auxio.navigation.MainNavigationAction
 import org.oxycblt.auxio.navigation.NavigationViewModel
 import org.oxycblt.auxio.util.logD
+import org.oxycblt.auxio.util.shareSong
 import org.oxycblt.auxio.util.showToast
 
 /**
@@ -99,6 +100,9 @@ abstract class ListFragment<in T : Music, VB : ViewBinding> :
                 R.id.action_go_album -> {
                     navModel.exploreNavigateTo(song.album)
                 }
+                R.id.action_song_share -> {
+                    requireContext().shareSong(song)
+                }
                 R.id.action_playlist_add -> {
                     musicModel.addToPlaylist(song)
                 }

app/src/main/java/org/oxycblt/auxio/list/selection/SelectionFragment.kt

@@ -26,6 +26,7 @@ import org.oxycblt.auxio.R
 import org.oxycblt.auxio.music.MusicViewModel
 import org.oxycblt.auxio.playback.PlaybackViewModel
 import org.oxycblt.auxio.ui.ViewBindingFragment
+import org.oxycblt.auxio.util.shareSongs
 import org.oxycblt.auxio.util.showToast
 
 /**
@@ -86,6 +87,10 @@ abstract class SelectionFragment<VB : ViewBinding> :
                 playbackModel.shuffle(selectionModel.take())
                 true
             }
+            R.id.action_selection_share -> {
+                requireContext().shareSongs(selectionModel.take())
+                true
+            }
             else -> false
         }
 }

app/src/main/java/org/oxycblt/auxio/music/fs/Fs.kt

@@ -212,4 +212,14 @@ data class MimeType(val fromExtension: String, val fromFormat: String?) {
             MimeTypeMap.getSingleton().getExtensionFromMimeType(fromExtension)?.uppercase()
         }
     }
+
+    /**
+     * Return a mime-type such as "audio/ogg"
+     *
+     * @return A raw mime-type string. Will first try [fromFormat], then falling
+     *   back to [fromExtension], and then null if that fails.
+     */
+    fun getRawType(): String {
+        return fromFormat ?: fromExtension
+    }
 }

app/src/main/java/org/oxycblt/auxio/util/ShareUtil.kt

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2023 Auxio Project
+ * ShareUtil.kt is part of Auxio.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package org.oxycblt.auxio.util
+
+import android.content.Context
+import androidx.core.app.ShareCompat
+import org.oxycblt.auxio.music.Song
+
+private const val MIME_TYPE_FALLBACK = "audio/*"
+
+/**
+ * Show system share sheet to share song
+ *
+ * @param song the [Song] to share
+ */
+fun Context.shareSong(song: Song) {
+    ShareCompat.IntentBuilder(this)
+        .setStream(song.uri)
+        .setType(song.mimeType.getRawType())
+        .startChooser()
+}
+
+/**
+ * Show system share sheet to share multiple song
+ *
+ * @param songs the collection of [Song] to share
+ */
+fun Context.shareSongs(songs: Collection<Song>) {
+    if (songs.isEmpty()) {
+        return
+    }
+    if (songs.size == 1) {
+        shareSong(songs.first())
+        return
+    }
+    val type = songs.mapTo(HashSet(songs.size)) {
+        it.mimeType.getRawType()
+    }.singleOrNull() ?: MIME_TYPE_FALLBACK
+    ShareCompat.IntentBuilder(this)
+        .apply {
+            for (song in songs) {
+                addStream(song.uri)
+            }
+        }
+        .setType(type)
+        .startChooser()
+}

app/src/main/res/menu/menu_selection_actions.xml

@@ -21,4 +21,8 @@
         android:id="@+id/action_selection_shuffle"
         android:title="@string/lbl_shuffle_selected"
         app:showAsAction="never"/>
+    <item
+        android:id="@+id/action_selection_share"
+        android:title="@string/lbl_share"
+        app:showAsAction="never"/>
 </menu>

app/src/main/res/menu/menu_song_actions.xml

@@ -15,6 +15,9 @@
     <item
         android:id="@+id/action_playlist_add"
         android:title="@string/lbl_playlist_add" />
+    <item
+        android:id="@+id/action_song_share"
+        android:title="@string/lbl_share" />
     <item
         android:id="@+id/action_song_detail"
         android:title="@string/lbl_song_detail" />

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

@@ -118,6 +118,7 @@
     <string name="lbl_go_artist">Go to artist</string>
     <string name="lbl_go_album">Go to album</string>
     <string name="lbl_song_detail">View properties</string>
+    <string name="lbl_share">Share</string>
 
     <string name="lbl_props">Song properties</string>
     <string name="lbl_file_name">File name</string>