new posts

def/post.js

@@ -0,0 +1,45 @@
+class Post {
+    constructor(info){
+        if(!info || !info.userid) throw "Can not construct empty posts"
+        this.userid = info.userid;
+        this.content = info.content;
+        this.createdAt = info.createdAt || new Date();
+        this.reactions = info.reactions || {};
+        this.comments = info.comments || [];
+        //This should record edits
+        this.contentHistory = info.contentHistory || []; 
+        // Any reaction or comment updates this ts,
+        // this will be used as index to query new posts
+        this.lastUpdated = info.lastUpdated || this.createdAt;
+    }
+
+    addComment(comment){
+        this.comments.push(comment);
+        this.lastUpdated = new Date();
+    }
+
+    addReaction(reaction){
+        if(this.reactions[reaction.userid] && 
+           this.reactions[reaction.userid].type === reaction.type){
+            delete this.reactions[reaction.userid]
+        }
+        else{
+            this.reactions[reaction.userid] = reaction;
+        }
+        this.lastUpdated = new Date();
+    }
+
+    toObj=function(){
+        let r = {}
+        r.userid = this.userid;
+        r.content = this.content;
+        r.createdAt = this.createdAt;
+        r.reactions = this.reactions;
+        r.comments = this.comments;
+        r.contentHistory = this.contentHistory;
+        r.lastUpdated = this.lastUpdated;
+        return r;
+    }
+}
+
+module.exports = Post;