1 files changed, 26 insertions, 4 deletions

diff --git a/backend.js b/backend.js
index f3d8cfd..dc819ab 100644
--- a/backend.js
+++ b/backend.js
@@ -166,6 +166,7 @@ class QueuePlayer extends EventEmitter {
     }
 
     recursivelyAddTracks(topItem)
+    this.emit('queue', topItem, afterItem, {movePlayingTrack})
     this.emitQueueUpdated()
 
     // This is the first new track, if a group was queued.
@@ -174,9 +175,12 @@ class QueuePlayer extends EventEmitter {
     return newTrack
   }
 
-  distributeQueue(grouplike, {how = 'evenly', rangeEnd = 'end-of-queue'}) {
-    if (isTrack(grouplike)) {
-      grouplike = {items: [grouplike]}
+  distributeQueue(topItem, {how = 'evenly', rangeEnd = 'end-of-queue'} = {}) {
+    let grouplike
+    if (isTrack(topItem)) {
+      grouplike = {items: [topItem]}
+    } else {
+      grouplike = topItem
     }
 
     const { items } = this.queueGrouplike
@@ -242,6 +246,7 @@ class QueuePlayer extends EventEmitter {
       }
     }
 
+    this.emit('distribute-queue', topItem, {how, rangeEnd})
     this.emitQueueUpdated()
   }
 
@@ -286,6 +291,7 @@ class QueuePlayer extends EventEmitter {
     }
 
     recursivelyUnqueueTracks(topItem)
+    this.emit('unqueue', topItem)
     this.emitQueueUpdated()
 
     return focusItem
@@ -303,6 +309,7 @@ class QueuePlayer extends EventEmitter {
       items.splice(index)
     }
 
+    this.emit('clear-queue-past', track)
     this.emitQueueUpdated()
   }
 
@@ -319,6 +326,7 @@ class QueuePlayer extends EventEmitter {
       items.splice(startIndex, endIndex - startIndex)
     }
 
+    this.emit('clear-queue-up-to', track)
     this.emitQueueUpdated()
   }
 
@@ -349,6 +357,7 @@ class QueuePlayer extends EventEmitter {
     const remainingItems = queue.items.slice(index)
     const newItems = initialItems.concat(shuffleArray(remainingItems))
     queue.items = newItems
+    this.emit('shuffle-queue')
     this.emitQueueUpdated()
   }
 
@@ -357,6 +366,7 @@ class QueuePlayer extends EventEmitter {
     // the track that's currently playing).
     this.queueGrouplike.items = this.queueGrouplike.items
       .filter(item => item === this.playingTrack)
+    this.emit('clear-queue')
     this.emitQueueUpdated()
   }
 
@@ -526,7 +536,11 @@ class QueuePlayer extends EventEmitter {
   }
 
   seekBack(seconds) {
-    this.time -= seconds
+    if (this.time < seconds) {
+      this.time = 0
+    } else {
+      this.time -= seconds
+    }
     this.player.seekBack(seconds)
     this.emit('seek-back', +seconds)
   }
@@ -659,6 +673,14 @@ class Backend extends EventEmitter {
 
     for (const event of [
       'playing',
+      'queue',
+      'distribute-queue',
+      'unqueue',
+      'clear-queue-past',
+      'clear-queue-up-to',
+      'shuffle-queue',
+      'clear-queue',
+      'queue updated',
       'seek-ahead',
       'seek-back',
       'toggle-pause',