Rebase source onto dev

app/src/main/java/xyz/quaver/pupil/sources/Common.kt

@@ -0,0 +1,37 @@
+/*
+ *     Pupil, Hitomi.la viewer for Android
+ *     Copyright (C) 2020  tom5079
+ *
+ *     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 <http://www.gnu.org/licenses/>.
+ */
+
+package xyz.quaver.pupil.sources
+
+import com.google.android.gms.vision.L
+import kotlin.reflect.KClass
+
+interface SearchResult {
+    val id: String
+    val title: String
+    val thumbnail: String
+    val artists: List<String>
+}
+
+// Might be better to use channel on Query_Result
+interface Source<Query_SortMode: Enum<*>, Query_Result: SearchResult> {
+    val querySortModeClass: KClass<Query_SortMode>
+    val queryResultClass: KClass<Query_Result>
+
+    suspend fun query(query: String, range: IntRange, sortMode: Query_SortMode? = null) : Pair<List<Query_Result>, Int>
+}