add update post endpoint

dbTools/post.js

@@ -19,6 +19,23 @@ postDB = (DB)=>{
         });
     }
 
+    DB.updatePost = (postid, newContent, oldContent) => {
+        const id = DB.ObjectID(postid);
+        let update = {
+            $set:{
+                content: newContent,
+                // lastUpdated: new Date() // add back when finish updating videos.
+            },
+            $push: {
+                contentHistory: oldContent
+            }
+        }
+        return DB.postCols.updateOne({_id: id}, update).catch((err)=>{
+            console.log(err);
+            return false;
+        });
+    }
+
     DB.newReaction = (postid, profileid, reaction) => {
         const id = DB.ObjectID(postid);
         let update = {

routes/post.js

@@ -240,6 +240,21 @@ DB.getDB.then((DB) => {
         });
     });
 
+    router.post("/:id", async (req, res) => {
+        const profileid = getProfileId(req) + '';
+        const postId = req.params.id;
+        const post = await DB.getPost(postId);
+        const newContent = req.body.content;
+        if (!postBelongToProfile(post, profileid))
+            return res.json({
+                status: "This post is not yours."
+            });
+        await DB.updatePost(postId, newContent, post.content);
+        return res.json({
+            status: "ok"
+        });
+    });
+
 });
 
 module.exports = router