modified function to add/delete topic only from user

functions/handlers/topic.js

@@ -1,20 +1,23 @@
 const { admin, db } = require("../util/admin");
 exports.putTopic = (req, res) => {
-  const newTopic = {
+  let new_following = [];
-    topic: req.body.topic
+  let userRef = db.doc(`/users/${req.userData.handle}`);
-  };
+  userRef.get().then(doc => {
+    new_following = doc.data().followedTopics;
+    new_following.push(req.body.following);
 
-  admin
+    // add stuff
-    .firestore()
+    userRef
-    .collection("topics")
+      .set({ followedTopics: new_following }, { merge: true })
-    .add(newTopic)
       .then(doc => {
-      const resTopic = newTopic;
+        return res
-      return res.status(200).json(resTopic);
+          .status(201)
+          .json({ message: `Following ${req.body.following}` });
       })
       .catch(err => {
-      console.error(err);
+        return res.status(500).json({ err });
-      return res.status(500).json({ error: "something is wrong" });
+      });
+    return res.status(200).json({ message: "OK" });
   });
 };
 
@@ -40,25 +43,51 @@ exports.getAllTopics = (req, res) => {
 };
 
 exports.deleteTopic = (req, res) => {
-  const topic = db.doc(`/topics/${req.params.topicId}`);
+  let new_following = [];
-  topic
+  let userRef = db.doc(`/users/${req.userData.handle}`);
-    .get()
+  userRef.get().then(doc => {
-    .then(doc => {
+    new_following = doc.data().followedTopics;
-      if (!doc.exists) {
+    // remove username from array
-        return res.status(404).json({ error: "Topic not found" });
+    new_following.forEach(function(follower, index) {
-      } else {
+      if (follower === `${req.body.topic}`) {
-        return topic.delete();
+        new_following.splice(index, 1);
       }
-    })
+    });
-    .then(() => {
+
-      return res.json({ message: "Topic successfully deleted!" });
+    // update database
+    userRef
+      .set({ followedTopics: new_following }, { merge: true })
+      .then(doc => {
+        return res
+          .status(202)
+          .json({ message: `Successfully unfollow ${req.body.unfollow}` });
       })
       .catch(err => {
-      console.error(err);
+        return res.status(500).json({ err });
-      return res.status(500).json({ error: "Failed to delete topic." });
+      });
+    return res.status(200).json({ message: "ok" });
   });
 };
 
+// const topic = db.doc(`/topics/${req.params.topicId}`);
+// topic
+//   .get()
+//   .then(doc => {
+//     if (!doc.exists) {
+//       return res.status(404).json({ error: "Topic not found" });
+//     } else {
+//       return topic.delete();
+//     }
+//   })
+//   .then(() => {
+//     return res.json({ message: "Topic successfully deleted!" });
+//   })
+//   .catch(err => {
+//     console.error(err);
+//     return res.status(500).json({ error: "Failed to delete topic." });
+//   });
+// };
+
 exports.getUserTopics = (req, res) => {
   let data = [];
   db.doc(`/users/${req.body.handle}`)

functions/index.js

@@ -96,7 +96,7 @@ app.post("/putTopic", fbAuth, putTopic);
 app.get("/getAllTopics", fbAuth, getAllTopics);
 
 // delete a specific topic
-app.delete("/deleteTopic/:topicId", fbAuth, deleteTopic);
+app.post("/deleteTopic", fbAuth, deleteTopic);
 
 // get topic for this user
 app.post("/getUserTopics", fbAuth, getUserTopics);