User.js

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

const userSchema = new mongoose.Schema(
  {
    email: { type: String, unique: true },
    password: String,
    passwordResetToken: String,
    passwordResetExpires: Date,
    emailVerificationToken: String,
    emailVerified: Boolean,
    twitter: String,
    google: String,
    tokens: Array,
    favoriteRecipes: Array,
    userName: { type: String },

    profile: {
      name: String,
      gender: String,
      location: String,
      website: String,
      picture: String,
    },
  },
  { timestamps: true }
);

// Password hash middleware.

userSchema.pre("save", function save(next) {
  const user = this;
  if (!user.isModified("password")) {
    return next();
  }
  bcrypt.genSalt(10, (err, salt) => {
    if (err) {
      return next(err);
    }
    bcrypt.hash(user.password, salt, (err, hash) => {
      if (err) {
        return next(err);
      }
      user.password = hash;
      next();
    });
  });
});

// Helper method for validating user's password.

userSchema.methods.comparePassword = function comparePassword(
  candidatePassword,
  cb
) {
  bcrypt.compare(candidatePassword, this.password, (err, isMatch) => {
    cb(err, isMatch);
  });
};

/**
 * Helper method for getting user's gravatar.
 */
userSchema.methods.gravatar = function gravatar(size) {
  if (!size) {
    size = 200;
  }
  if (!this.email) {
    return `https://gravatar.com/avatar/?s=${size}&d=retro`;
  }
  const md5 = crypto.createHash("md5").update(this.email).digest("hex");
  return `https://gravatar.com/avatar/${md5}?s=${size}&d=retro`;
};

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