closes #4512

public/src/client/topic.js

@@ -143,7 +143,7 @@ define('forum/topic', [
 			if (components.get('post/anchor', postIndex).length) {
 				return navigator.scrollToPostIndex(postIndex, true);
 			}
-		} else if (bookmark && (!config.usePagination || (config.usePagination && ajaxify.data.pagination.currentPage === 1)) && ajaxify.data.postcount > 5) {
+		} else if (bookmark && (!config.usePagination || (config.usePagination && ajaxify.data.pagination.currentPage === 1)) && ajaxify.data.postcount > ajaxify.data.bookmarkThreshold) {
 			navigator.update(0);
 			app.alert({
 				alert_id: 'bookmark',
@@ -280,7 +280,7 @@ define('forum/topic', [
 		var bookmarkKey = 'topic:' + ajaxify.data.tid + ':bookmark';
 		var currentBookmark = ajaxify.data.bookmark || localStorage.getItem(bookmarkKey);
 
-		if (ajaxify.data.postcount > 5 && (!currentBookmark || parseInt(index, 10) > parseInt(currentBookmark, 10))) {
+		if (ajaxify.data.postcount > ajaxify.data.bookmarkThreshold && (!currentBookmark || parseInt(index, 10) > parseInt(currentBookmark, 10))) {
 			if (app.user.uid) {
 				socket.emit('topics.bookmark', {
 					'tid': ajaxify.data.tid,

src/controllers/topics.js

@@ -261,6 +261,7 @@ topicsController.get = function(req, res, callback) {
 		data['reputation:disabled'] = parseInt(meta.config['reputation:disabled'], 10) === 1;
 		data['downvote:disabled'] = parseInt(meta.config['downvote:disabled'], 10) === 1;
 		data['feeds:disableRSS'] = parseInt(meta.config['feeds:disableRSS'], 10) === 1;
+		data.bookmarkThreshold = parseInt(meta.config.bookmarkThreshold, 10) || 5;
 		data.scrollToMyPost = settings.scrollToMyPost;
 		data.rssFeedUrl = nconf.get('relative_path') + '/topic/' + data.tid + '.rss';
 		data.pagination = pagination.create(currentPage, pageCount);

src/views/admin/settings/post.tpl

@@ -100,6 +100,10 @@
 				<label for="unreadCutoff">Unread cutoff days</label>
 				<input id="unreadCutoff" type="text" class="form-control" value="2" data-field="unreadCutoff">
 			</div>
+			<div class="form-group">
+ 				<label for="bookmarkthreshold">Minimum posts in topic before tracking last read</label>
+ 				<input id="bookmarkthreshold" type="text" class="form-control" value="5" data-field="bookmarkThreshold">
+ 			</div>
 		</form>
 	</div>
 </div>