feat: save tags in new topic drafts

Author: julianlam

static/lib/composer.js

@@ -298,6 +298,7 @@ define('composer', [
 
 		var titleEl = postContainer.find('input.title');
 		var handleEl = postContainer.find('input.handle');
+		var tagsEl = postContainer.find('input.tags');
 		var bodyEl = postContainer.find('textarea');
 		var submitBtn = postContainer.find('.composer-submit');
 
@@ -397,6 +398,12 @@ define('composer', [
 		if (draft && draft.handle) {
 			handleEl.val(draft.handle);
 		}
+		if (draft && draft.tags) {
+			const tags = draft.tags.split(',');
+			tags.forEach(function (tag) {
+				tagsEl.tagsinput('add', tag);
+			});
+		}
 		bodyEl.val(draft.text ? draft.text : postData.body);
 
 		handleHelp(postContainer);

static/lib/composer/drafts.js

@@ -61,9 +61,14 @@ define('composer/drafts', function () {
 		var uid = save_id.split(':')[1];
 		var storage = parseInt(uid, 10) ? localStorage : sessionStorage;
 		var draft = {
-			title: storage.getItem(save_id + ':title'),
 			text: storage.getItem(save_id),
 		};
+		['cid', 'title', 'tags'].forEach(function (key) {
+			const value = storage.getItem(save_id + ':' + key);
+			if (value) {
+				draft[key] = value;
+			}
+		});
 		if (!parseInt(uid, 10)) {
 			draft.handle = storage.getItem(save_id + ':handle');
 		}
@@ -78,13 +83,20 @@ define('composer/drafts', function () {
 
 	function saveDraft(postContainer, draftIconEl, postData) {
 		if (canSave(app.user.uid ? 'localStorage' : 'sessionStorage') && postData && postData.save_id && postContainer.length) {
-			var title = postContainer.find('input.title').val();
+			const titleEl = postContainer.find('input.title');
+			const title = titleEl && titleEl.val();
 			var raw = postContainer.find('textarea').val();
 			var storage = app.user.uid ? localStorage : sessionStorage;
 
-			if (raw.length) {
+			if (raw.length || (title && title.length)) {
 				storage.setItem(postData.save_id, raw);
-				storage.setItem(postData.save_id + ':title', title);
+
+				if (postData.hasOwnProperty('cid')) {
+					// New topic only
+					const tags = postContainer.find('input.tags').val();
+					storage.setItem(postData.save_id + ':tags', tags);
+					storage.setItem(postData.save_id + ':title', title);
+				}
 				if (!app.user.uid) {
 					var handle = postContainer.find('input.handle').val();
 					storage.setItem(postData.save_id + ':handle', handle);