default cover images for groups

src/coverPhoto.js

@@ -0,0 +1,24 @@
+"use strict";
+
+var coverPhoto = {};
+var meta = require('./meta');
+var nconf = require('nconf');
+
+
+coverPhoto.getDefaultCover = function(groupName) {
+	return getCover('groups', groupName);
+};
+
+function getCover(type, id) {
+	var covers = meta.config[type + ':defaultCovers'].split(/\s*?,\s*?/g);
+	
+	if (typeof id === 'string') {
+		id = (id.charCodeAt(0) + id.charCodeAt(1)) % covers.length;
+	} else {
+		id = id % covers.length;
+	}
+
+	return covers && covers.length ? covers[id] : (nconf.get('relative_path') + '/images/cover-default.png');
+}
+
+module.exports = coverPhoto;

src/groups.js

@@ -163,11 +163,8 @@ var async = require('async'),
 				return callback(new Error('[[error:no-group]]'));
 			}
 
-			// Default image
-			if (!results.base['cover:url']) {
-				results.base['cover:url'] = nconf.get('relative_path') + '/images/cover-default.png';
-				results.base['cover:position'] = '50% 50%';
-			}
+			results.base['cover:url'] = results.base['cover:url'] || require('./coverPhoto').getDefaultCover(groupName);
+			results.base['cover:position'] = results.base['cover:position'] || '50% 50%';
 
 			plugins.fireHook('filter:parse.raw', results.base.description, function(err, descriptionParsed) {
 				if (err) {

src/views/admin/settings/group.tpl

@@ -28,6 +28,12 @@
 			<p class="help-block">
 				If enabled, users can create groups <em>(Default: disabled)</em>
 			</p>
+
+			<label for="groups:defaultCovers"><strong>Default Cover Images</strong></label>
+			<p class="help-block">
+				Add comma-separated default cover images for groups that don't have an uploaded cover image
+			</p>
+			<input type="text" class="form-control input-lg" id="groups:defaultCovers" data-field="groups:defaultCovers" value="{config.relative_path}/images/cover-default.png" placeholder="https://example.com/group1.png, https://example.com/group2.png" /><br />
 		</form>
 	</div>
 </div>