module.exports = function(crowi) {
  var debug = require('debug')('growi:models:bookmark')
    , mongoose = require('mongoose')
    , ObjectId = mongoose.Schema.Types.ObjectId
    , bookmarkSchema;

  bookmarkSchema = new mongoose.Schema({
    page: { type: ObjectId, ref: 'Page', index: true },
    user: { type: ObjectId, ref: 'User', index: true },
    createdAt: { type: Date, default: Date.now() }
  });
  bookmarkSchema.index({page: 1, user: 1}, {unique: true});


  // bookmark チェック用
  bookmarkSchema.statics.findByPageIdAndUserId = function(pageId, userId) {
    const Bookmark = this;

    return new Promise(function(resolve, reject) {
      return Bookmark.findOne({ page: pageId, user: userId }, function(err, doc) {
        if (err) {
          return reject(err);
        }

        return resolve(doc);
      });
    });
  };

  return mongoose.model('Bookmark', bookmarkSchema);
};