Create addition functions for upload queue

src/assets/source/js/uploadmanager.js

@@ -4,6 +4,7 @@ $(document).ready(function() {
     window.workspace = $('#workspace');
     window.uploadManagerContainer = $('[role="uploadmanager"]');
     window.fileManagerModalContainer = $(window.frameElement).parents('[role="filemanager-modal"]');
+    window.upload_tasks = [];
 
     /**
      * Add file to upload.
@@ -54,7 +55,7 @@ $(document).ready(function() {
         e.preventDefault();
 
         var fileNumber = $(this).attr('data-file-number'),
-            fileBlock = $(this).parents('[role="file-block-'+fileNumber+'"]'),
+            fileBlock = $(this).parents('[role="file-block"]'),
             progressBlock = fileBlock.find('[role="progress-block"]'),
             url = window.uploadManagerContainer.attr('data-delete-url'),
             params = {
@@ -85,7 +86,7 @@ $(document).ready(function() {
         e.preventDefault();
 
         var fileNumber = $(this).attr('data-file-number'),
-            fileBlock = $(this).parents('[role="file-block-'+fileNumber+'"]');
+            fileBlock = $(this).parents('[role="file-block"]');
 
         delete window.preparedFiles[fileNumber];
 
@@ -168,7 +169,10 @@ $(document).ready(function() {
     }
 
     /**
-     * Single upload file.
+     *
+     * @param fileNumber
+     *
+     * @returns {boolean}
      */
     function upload_file(fileNumber) {
         var fileBlock = $('[role="file-block-'+fileNumber+'"]'),
@@ -245,5 +249,60 @@ $(document).ready(function() {
         }, function(data, xhr) {
             showPopup(progressBlock, data.message, true, 0);
         });
+
+        return true;
+    }
+
+    /**
+     * @param file_number
+     */
+    function push_upload_task(file_number)
+    {
+        var status = check_uploading_tasks() ? 'wait' : 'running';
+
+        window.upload_tasks.push({
+            status: status,
+            file_number: file_number
+        });
+
+        if (status == 'running') {
+            upload_file(file_number);
+        }
+    }
+
+    /**
+     * @returns {boolean}
+     */
+    function check_uploading_tasks()
+    {
+        return _.findIndex(window.upload_tasks, function(o) {return o.status == 'running';}) !== -1;
+    }
+
+    /**
+     * @param file_number
+     *
+     * @returns {*}
+     */
+    function find_upload_task_index(file_number)
+    {
+        return _.findIndex(window.upload_tasks, function(o) {return o.file_number == file_number;});
+    }
+
+    function close_upload_task_status(file_number)
+    {
+        var task_index = find_upload_task_index(file_number);
+
+        if (task_index !== -1) {
+            window.upload_tasks[task_index].status = 'done';
+        }
+    }
+
+    function retrive_next_upload_task()
+    {
+        var next_index = _.findIndex(window.upload_tasks, function(o) {return o.status == 'wait';});
+
+        window.upload_tasks[next_index].status = 'wait';
+
+        upload_file(window.upload_tasks[next_index].file_number);
     }
 });