From 71a356552fff1985b33156ecebda98782d283fc5 Mon Sep 17 00:00:00 2001
From: Wu Cheng-Han
Date: Sat, 26 Nov 2016 23:04:29 +0800
Subject: Update to auto generate meta description based on content in publish
 note and slide

---
 lib/models/note.js |  3 +++
 lib/response.js    | 21 ++++++++++++++-------
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/lib/models/note.js b/lib/models/note.js
index 05ed04c0..5727046c 100644
--- a/lib/models/note.js
+++ b/lib/models/note.js
@@ -260,6 +260,9 @@ module.exports = function (sequelize, DataTypes) {
                 if (!title) title = "Untitled";
                 return title;
             },
+            generateDescription: function (markdown) {
+                return markdown.substr(0, 100).replace(/(?:\r\n|\r|\n)/g, ' ');
+            },
             decodeTitle: function (title) {
                 var decodedTitle = LZString.decompressFromBase64(title);
                 if (decodedTitle) title = decodedTitle;
diff --git a/lib/response.js b/lib/response.js
index b2d13988..0004f824 100755
--- a/lib/response.js
+++ b/lib/response.js
@@ -178,8 +178,11 @@ function showPublishNote(req, res, next) {
             }
             var body = LZString.decompressFromBase64(note.content);
             var meta = null;
+            var markdown = null;
             try {
-                meta = models.Note.parseMeta(metaMarked(body).meta);
+                var obj = metaMarked(body);
+                markdown = obj.markdown;
+                meta = models.Note.parseMeta(obj.meta);
             } catch(err) {
                 //na
             }
@@ -191,7 +194,7 @@ function showPublishNote(req, res, next) {
             var origin = config.serverurl;
             var data = {
                 title: title,
-                description: meta.description,
+                description: meta.description || markdown ? models.Note.generateDescription(markdown) : null,
                 viewcount: note.viewcount,
                 createtime: createtime,
                 updatetime: updatetime,
@@ -249,8 +252,11 @@ function actionDownload(req, res, note) {
 function actionInfo(req, res, note) {
     var body = LZString.decompressFromBase64(note.content);
     var meta = null;
+    var markdown = null;
     try {
-        meta = models.Note.parseMeta(metaMarked(body).meta);
+        var obj = metaMarked(body);
+        markdown = obj.markdown;
+        meta = models.Note.parseMeta(obj.meta);
     } catch(err) {
         //na
     }
@@ -260,7 +266,7 @@ function actionInfo(req, res, note) {
     var title = models.Note.decodeTitle(note.title);
     var data = {
         title: meta.title || title,
-        description: meta.description,
+        description: meta.description || markdown ? models.Note.generateDescription(markdown) : null,
         viewcount: note.viewcount,
         createtime: createtime,
         updatetime: updatetime
@@ -560,9 +566,10 @@ function showPublishSlide(req, res, next) {
             }
             var body = LZString.decompressFromBase64(note.content);
             var meta = null;
+            var markdown = null;
             try {
                 var obj = metaMarked(body);
-                body = obj.markdown;
+                markdown = obj.markdown;
                 meta = models.Note.parseMeta(obj.meta);
             } catch(err) {
                 //na
@@ -575,12 +582,12 @@ function showPublishSlide(req, res, next) {
             var origin = config.serverurl;
             var data = {
                 title: title,
-                description: meta.description,
+                description: meta.description || markdown ? models.Note.generateDescription(markdown) : null,
                 viewcount: note.viewcount,
                 createtime: createtime,
                 updatetime: updatetime,
                 url: origin,
-                body: body,
+                body: markdown,
                 meta: JSON.stringify(obj.meta || {}),
                 useCDN: config.usecdn,
                 owner: note.owner ? note.owner.id : null,
-- 
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