correct omitted reply count

db/posts.js

@@ -61,8 +61,13 @@ module.exports = {
 			if (thread.replyposts > 5) {
 				//dont show ALL backlinks on OP for previews on index page
 				const firstPreviewId = thread.replies[0].postId;
-				const firstPreviewBacklinkIndex = thread.backlinks.map(bl => bl.postId).indexOf(firstPreviewId);
-				thread.previewbacklinks = thread.backlinks.slice(firstPreviewBacklinkIndex);
+				const latestPreviewBacklink = thread.backlinks.find(bl => { return bl.postId >= firstPreviewId });
+				if (latestPreviewBacklink != null) {
+					const latestPreviewIndex = thread.backlinks.map(bl => bl.postId).indexOf(latestPreviewBacklink);
+					thread.previewbacklinks = thread.backlinks.slice(latestPreviewIndex);
+				} else {
+					thread.previewbacklinks = [];
+				}
 				//cout omitted image and posts
 				const numPreviewImages = replies.reduce((acc, post) => { return acc + post.files.length }, 0);
 				thread.omittedimages = thread.replyfiles - numPreviewImages;

views/mixins/post.pug

@@ -94,11 +94,14 @@ mixin post(post, truncate, manage=false, globalmanage=false)
 				blockquote.muted #{post.omittedposts} post(s)#{post.omittedimages > 0 ? ' and '+post.omittedimages+' image(s)' : ''} omitted. #[a(href=`${postURL}#${post.postId}`) View the full thread]
 			if post.previewbacklinks
 				.replies Replies: 
-					each backlink in post.previewbacklinks
-						a.quote(href=`/${post.board}/thread/${post.thread || post.postId}.html#${backlink.postId}`) >>#{backlink.postId}
-						|  
-					if post.previewbacklinks.length < post.backlinks.length
-						| + #{post.backlinks.length-post.previewbacklinks.length} reply link(s) omitted
+					if post.previewbacklinks.length === 0
+						| #{post.backlinks.length-post.previewbacklinks.length} reply link(s) omitted
+					else 
+						each backlink in post.previewbacklinks
+							a.quote(href=`/${post.board}/thread/${post.thread || post.postId}.html#${backlink.postId}`) &gt;&gt;#{backlink.postId}
+							|  
+						if post.previewbacklinks.length < post.backlinks.length
+							| + #{post.backlinks.length-post.previewbacklinks.length} reply link(s) omitted
 			else if post.backlinks && post.backlinks.length > 0
 				.replies Replies: 
 					each backlink in post.backlinks