From 7738d136798a1c23249efd6cd88973a8db545740 Mon Sep 17 00:00:00 2001
From: j <0x006A@0x2620.org>
Date: Wed, 17 Apr 2013 10:01:57 +0000
Subject: [PATCH] implement pause/resume for chunk upload

---
 static/js/pandora/chunkupload.js | 40 +++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/static/js/pandora/chunkupload.js b/static/js/pandora/chunkupload.js
index 9771e5f49..cd886d5a5 100644
--- a/static/js/pandora/chunkupload.js
+++ b/static/js/pandora/chunkupload.js
@@ -30,10 +30,14 @@ pandora.chunkupload = function(options) {
         chunkURL,
         file = options.file,
         maxRetry = -1,
+        nextChunkId,
+        paused = false,
         retries = 0,
         request,
         that = Ox.Element();
 
+    options.data = options.data || {};
+
     initUpload();
 
     function done() {
@@ -143,7 +147,12 @@ pandora.chunkupload = function(options) {
                 // reset retry counter
                 retries = 0;
                 // start uploading next chunk
-                uploadChunk(chunkId + 1);
+                if (paused) {
+                    nextChunkId = chunkId + 1;
+                    that.triggerEvent('paused', {next: nextChunkId});
+                } else {
+                    uploadChunk(chunkId + 1);
+                }
             } else {
                 // failed to upload, try again in 5 second
                 retries++;
@@ -153,7 +162,12 @@ pandora.chunkupload = function(options) {
                     done();
                 } else {
                     setTimeout(function() {
-                        uploadChunk(chunkId);
+                        if (paused) {
+                            nextChunkId = chunkId;
+                            that.triggerEvent('paused', {next: nextChunkId});
+                        } else {
+                            uploadChunk(chunkId);
+                        }
                     }, 5000);
                 }
             }
@@ -167,7 +181,12 @@ pandora.chunkupload = function(options) {
                 done();
             } else {
                 setTimeout(function() {
-                    uploadChunk(chunkId);
+                    if (paused) {
+                        nextChunkId = chunkId;
+                        that.triggerEvent('paused', {next: nextChunkId});
+                    } else {
+                        uploadChunk(chunkId);
+                    }
                 }, 3000);
             }
         }, false);
@@ -200,6 +219,21 @@ pandora.chunkupload = function(options) {
             request.abort();
             request = null;
         }
+        return that;
+    };
+    that.pause = function() {
+        paused = true;
+        return that;
+    };
+    that.resume = function() {
+        if (paused) {
+            paused = false;
+            if (nextChunkId) {
+                uploadChunk(nextChunkId);
+                nextChunkId = null;
+            }
+        }
+        return that;
     };
 
     return that;