User.js

const mongoose = require("mongoose");
const bcrypt = require("bcryptjs");

const UserSchema = new mongoose.Schema({
  username: {
    type: String,
    required: true,
  },
  email: {
    type: String,
    required: true,
    unique: true,
  },
  password: {
    type: String,
  },
  googleId: {
    type: String,
    unique: true,
    sparse: true,
  },
});


UserSchema.pre('save', async function (next) {

    if (!this.isModified('password'))
        return next();

    try {
      const salt = await bcrypt.genSalt(10);
      this.password = await bcrypt.hash(this.password, salt);
      next();
    } catch (err) {
      return next(err);
    }
});

// Compare passwords during login
UserSchema.methods.comparePassword = async function (enteredPassword) {
    return await bcrypt.compare(enteredPassword, this.password);
};

module.exports = mongoose.model("User", UserSchema);