ENHANCEMENT: Files and images section warns if you are deleting a file that is linked to (from r96778)

git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/cms/trunk@105678 467b73ca-7a2a-4603-9d3b-597d59a354a9

javascript/AssetTableField.js

@@ -111,4 +111,60 @@
 			}
 		});
 	});
-}(jQuery));
+}(jQuery));
+
+// TODO Implementation in Behaviour instead of entwine is necessary to overload TableListField
+var AssetTableField = Class.create();
+AssetTableField.applyTo('#Form_EditForm_Files');
+AssetTableField.prototype = {
+	initialize: function() {
+		var rules = {};
+		rules['#'+this.id+' table.data a.deletelink'] = {onclick: this.deleteRecord.bind(this)};
+		Behaviour.register('ComplexTableField_'+this.id,rules);
+	},
+	
+	deleteRecord: function(e) {
+		var img = Event.element(e);
+		var link = Event.findElement(e,"a");
+		var row = Event.findElement(e,"tr");
+		
+		var linkCount = row.getElementsByClassName('linkCount')[0];
+		if(linkCount) linkCount = linkCount.innerHTML;
+		
+		var confirmMessage = ss.i18n._t('TABLEFIELD.DELETECONFIRMMESSAGE', 'Are you sure you want to delete this record?');
+		if(linkCount && linkCount > 0) confirmMessage += '\nThere are ' + linkCount + ' page(s) that use this file, please review the list of pages on the Links tab of the file before continuing.';
+
+		// TODO ajaxErrorHandler and loading-image are dependent on cms, but formfield is in sapphire
+		var confirmed = confirm(confirmMessage);
+		if(confirmed)
+		{
+			img.setAttribute("src",'cms/images/network-save.gif'); // TODO doesn't work
+			new Ajax.Request(
+				link.getAttribute("href"),
+				{
+					method: 'post', 
+					postBody: 'forceajax=1' + ($('SecurityID') ? '&SecurityID=' + $('SecurityID').value : ''),
+					onComplete: function(){
+						Effect.Fade(
+							row,
+							{
+								afterFinish: function(obj) {
+									// remove row from DOM
+									obj.element.parentNode.removeChild(obj.element);
+									// recalculate summary if needed (assumes that TableListField.js is present)
+									// TODO Proper inheritance
+									if(this._summarise) this._summarise();
+									// custom callback
+									if(this.callback_deleteRecord) this.callback_deleteRecord(e);
+								}.bind(this)
+							}
+						);
+					}.bind(this),
+					onFailure: this.ajaxErrorHandler
+				}
+			);
+		}
+		
+		Event.stop(e);
+	}
+};

templates/Includes/AssetTableField_Item.ss

@@ -1,6 +1,7 @@
 <tr id="record-$Parent.id-$ID"<% if HighlightClasses %> class="$HighlightClasses"<% end_if %>>
 	<td class="dragfile" id="drag-$Parent.Name-$ID">
 		<img id="drag-img-$Parent.Name-$ID" alt="Drag" title="<% _t('DRAGTOFOLDER','Drag to folder on left to move file') %>" src="sapphire/images/drag.gif" />
+		<span class="linkCount" style="display: none;">$BackLinkTrackingCount</span>
 	</div>
 	<% if Markable %><td class="markingcheckbox">$MarkingCheckbox</td><% end_if %>
 	<% control Fields %>