before npm rebuild

functions/handlers/post.js

@@ -69,3 +69,35 @@ exports.getallPosts = (req, res) => {
 exports.getFilteredPosts = (req, res) => {
     admin.firestore().collection('posts').where('userHandle', '==', 'new user').where('microBlogTopics', '==')
 };
+
+exports.getFilteredPostsOnTopics = (req, res) => {
+    
+    // get topics that user follows
+    // make a set storing all topics
+    // for each post, make a set of topics and if A and B != 0, you can display post
+    var queryTopics = admin.firestore().collection('users').where('userHandle', '==', req.userHandle)
+    var topics = new Set();
+    topics.add(queryTopics.get().microBlogTopics)
+    
+    //console.log(topics);
+    
+    var queryPosts = admin.firestore().collection('posts').where('microBlogTopics','==', topics);
+    
+    console.log(queryPosts);
+    
+    queryPosts.get()
+    .then(function(Posts) {
+        let posts = [];
+        Posts.forEach(function(doc){
+            posts.push(doc.data());
+        });
+        return res.status(200).json(posts);
+    })
+    .then(function() {
+        res.status(200).send("Successfully retrieved filtered posts from database.");
+        return;
+    })
+    .catch(function(err) {
+        res.status(500).send("Failed to retrieve posts from database.", err);
+    });
+}

functions/index.js

@@ -58,12 +58,14 @@ app.get("/getUserHandles", fbAuth, getUserHandles);
 /*------------------------------------------------------------------*
  *  handlers/post.js                                                *
  *------------------------------------------------------------------*/
-const { getallPostsforUser, getallPosts, putPost } = require("./handlers/post");
+const { getallPostsforUser, getallPosts, putPost, getFilteredPostsOnTopics } = require("./handlers/post");
 
 app.get("/getallPostsforUser", fbAuth, getallPostsforUser);
 
 app.get("/getallPosts", getallPosts);
 
+app.get("/getFilteredPostsOnTopics", getFilteredPostsOnTopics);
+
 // Adds one post to the database
 app.post("/putPost", fbAuth, putPost);