Reviews work (#47)

* added functions for creating reviews for each course

* Reviews work!

* lint

* lint II?

* Remove synching the search...

---------

Co-authored-by: emyemy89 <emiparaschiv345@gmail.com>

Author: jkluge

my-app/firebase.js

@@ -1,8 +1,7 @@
 import { initializeApp } from "firebase/app";
 import { getAuth, GoogleAuthProvider, onAuthStateChanged } from "firebase/auth";
-import { get, getDatabase, ref, set, onValue } from "firebase/database";
+import { get, getDatabase, ref, set, onValue, push } from "firebase/database";
 import { reaction, toJS } from "mobx";
-// foo
 // Your web app's Firebase configuration
 const firebaseConfig = {
 	apiKey: "AIzaSyCBckVI9nhAP62u5jZJW3F4SLulUv7znis",
@@ -49,8 +48,8 @@ async function firebaseToModel(model) {
 		noUpload = true;
 		if (data.favourites) 
             model.setFavourite(data.favourites);
-		if (data.currentSearch) 
-            model.setCurrentSearch(data.currentSearch);
+		// if (data.currentSearch) 
+        //     model.setCurrentSearch(data.currentSearch);
 		noUpload = false;
 	});
 }
@@ -61,16 +60,17 @@ export function syncModelToFirebase(model) {
 		() => ({
 			userId: model?.user,
 			favourites: toJS(model.favourites),
-			currentSearch: toJS(model.currentSearch),
+			// currentSearch: toJS(model.currentSearch),
 			// Add more per-user attributes here
 		}),
+		// eslint-disable-next-line no-unused-vars
 		({ userId, favourites, currentSearch }) => {
 			if (noUpload || !userId) 
                 return;
 			const userRef = ref(db, `users/${userId}`);
 			const dataToSync = {
 				favourites,
-				currentSearch,
+				//currentSearch,
 			};
 
 			set(userRef, dataToSync)
@@ -169,3 +169,35 @@ export async function saveJSONCoursesToFirebase(model, data) {
 		model.addCourse(course);
 	});
 }
+
+
+export async function addReviewForCourse(courseCode, review) {
+    try {
+        const reviewsRef = ref(db, `reviews/${courseCode}`);
+        const newReviewRef = push(reviewsRef);
+        await set(newReviewRef, review);
+    } catch (error) {
+        console.error("Error when adding a course to firebase:", error);
+	}
+}
+
+
+export async function getReviewsForCourse(courseCode) {
+    const reviewsRef = ref(db, `reviews/${courseCode}`);
+    const snapshot = await get(reviewsRef);
+    if (!snapshot.exists()) return [];
+
+    const reviews = [];
+    snapshot.forEach(childSnapshot => {
+        reviews.push({
+            id: childSnapshot.key,  // Firebase-generated unique key
+            userName: childSnapshot.val().userName,
+            text: childSnapshot.val().text
+        });
+    });
+    return reviews;
+}
+
+
+
+

my-app/src/model.js

@@ -1,4 +1,5 @@
-import { addCourse } from "../firebase";
+import { addCourse, addReviewForCourse, getReviewsForCourse } from "../firebase"; // for reviews
+
 
 export const model = {
     user: undefined,
@@ -65,4 +66,23 @@ export const model = {
             this.addCourse(course);
         });
     },
+
+    //for reviews
+    async addReview(courseCode, review) {
+        try {
+            await addReviewForCourse(courseCode, review);
+
+        } catch (error) {
+            console.error("Error adding review:", error);
+        }
+    },
+    
+    async getReviews(courseCode) {
+        try {
+            return await getReviewsForCourse(courseCode);
+        } catch (error) {
+            console.error("Error fetching reviews:", error);
+            return [];
+        }
+    },
 };

my-app/src/presenters/CourseViewPresenter.jsx

@@ -4,6 +4,7 @@ import { useState } from 'react';
 import ListView from "../views/ListView.jsx";
 import CoursePagePopup from '../views/Components/CoursePagePopup.jsx';
 import PrerequisitePresenter from './PrerequisitePresenter.jsx';
+import {ReviewPresenter} from "../presenters/ReviewPresenter.jsx"
 
 const ListViewPresenter = observer(({ model }) => {
     const addFavourite = (course) => {
@@ -22,15 +23,18 @@ const ListViewPresenter = observer(({ model }) => {
 
     const [isPopupOpen, setIsPopupOpen] = useState(false);
     const [selectedCourse, setSelectedCourse] = useState(null);
-    const preP = <PrerequisitePresenter model={model} selectedCourse={selectedCourse} />
+    const preP = <PrerequisitePresenter model={model} selectedCourse={selectedCourse} />;
+    const reviewPresenter = <ReviewPresenter model={model} course={selectedCourse}/>;
 
     const popup = <CoursePagePopup
         favouriteCourses={model.favourites}
         addFavourite={addFavourite}
         removeFavourite={removeFavourite}
         isOpen={isPopupOpen} onClose={() => setIsPopupOpen(false)}
         course={selectedCourse}
-        prerequisiteTree={preP} />
+        prerequisiteTree={preP} 
+        reviewPresenter={reviewPresenter}/>
+        
 
 
     return <ListView

my-app/src/presenters/ListViewPresenter.jsx

@@ -0,0 +1,46 @@
+import React, { useEffect, useState } from 'react';
+import { observer } from 'mobx-react-lite';
+import { ReviewView } from '../views/ReviewView.jsx';
+
+
+export const ReviewPresenter = observer(({ model, course }) => {
+    const [reviews, setReviews] = useState([]);
+    const [newReview, setNewReview] = useState("");
+
+    //fetch reviews when the course code changes
+    useEffect(() => {
+        async function fetchReviews() {
+            const data = await model.getReviews(course.code);
+            setReviews(data);
+        }
+        fetchReviews();
+    }, [course.code, model]);
+
+    
+    const handleReviewSubmit = async () => {
+        if (newReview.trim()) {
+            const review = {
+                userName: model.user?.name || "Anonymous",
+                text: newReview,
+                timestamp: Date.now(), //timestamp
+            };
+            await model.addReview(course.code, review);
+            //fetch and update the reviews after submitting
+            const updatedReviews = await model.getReviews(course.code);
+            setReviews(updatedReviews);
+            setNewReview(""); //clear text bar
+        }
+    };
+    
+
+    return (
+        <ReviewView
+            course={course}
+            reviews={reviews}
+            newReview={newReview}
+            setNewReview={setNewReview}
+            handleReviewSubmit={handleReviewSubmit}
+        />
+    );
+});
+