Fix #1092: Ensure player doesn't disappear when last queue track is removed manually

changes/changelog.d/1092.bugfix

+Ensure player doesn't disappear when last queue track is removed manually (#1092)

front/src/store/queue.js

@@ -104,8 +104,13 @@ export default {
       commit('splice', {start: index, size: 1})
       if (index < state.currentIndex) {
         commit('currentIndex', state.currentIndex - 1)
-      }
-      if (current) {
+      } else if (index > 0 && index === state.tracks.length) {
+        // kind of a edge case: if you delete the last track of the queue
+        // we set current index to the previous one to avoid the queue tab from
+        // being stuck because the player disappeared
+        // cf #1092
+        commit('currentIndex', state.tracks.length - 1)
+      } else if (current) {
         // we play next track, which now have the same index
         commit('currentIndex', index)
       }

front/tests/unit/specs/store/queue.spec.js

@@ -133,7 +133,7 @@ describe('store/queue', () => {
       testAction({
         action: store.actions.cleanTrack,
         payload: 3,
-        params: {state: {currentIndex: 2, tracks: []}},
+        params: {state: {currentIndex: 2, tracks: [1, 2, 3, 4, 5]}},
         expectedMutations: [
           { type: 'splice', payload: {start: 3, size: 1} }
         ]