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// Calculate similarity between users const similarUsers = await User.find().populate('ratings'); const similarities = similarUsers.map((similarUser) => { const similarUserRatings = similarUser.ratings; const similarity = calculateSimilarity(userRatings, similarUserRatings); return { user: similarUser, similarity }; });

const calculateSimilarity = (ratings1, ratings2) => { // Implement a similarity calculation algorithm (e.g. cosine similarity) // For demonstration purposes, a simple algorithm is used const intersection = ratings1.filter((rating) => ratings2.includes(rating)); return intersection.length / ratings1.length; }; watchonlinemovies.com

const movieSchema = new mongoose.Schema({ title: String, genre: String, ratings: [{ type: mongoose.Schema.Types.ObjectId, ref: 'MovieRating' }] }); // Calculate similarity between users const similarUsers =

const userSchema = new mongoose.Schema({ name: String, email: String, password: String, movieHistory: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Movie' }], ratings: [{ type: mongoose.Schema.Types.ObjectId, ref: 'MovieRating' }] }); const similarities = similarUsers.map((similarUser) =&gt

module.exports = recommendMovies; // api.js const express = require('express'); const router = express.Router(); const recommendMovies = require('./recommendation.algorithm');

const recommendMovies = async (userId) => { const user = await User.findById(userId).populate('movieHistory').populate('ratings'); const userRatings = user.ratings; const userHistory = user.movieHistory;

router.get('/recommendations', async (req, res) => { const userId = req.query.userId; const recommendedMovies = await recommendMovies(userId); res.json(recommendedMovies); });