class Db {
  constructor (models) {
    this.models = models
  }

  /**
   * Fonction sauvegardant en historique le morceau en cours de lecture
   * @param  {Object} value
   */
  saveSong (value) {
    // Find if previous song was the same (on bot reload)
    this.models.Histories
      .find({})
      .sort({
        createdAt: 'desc'
      })
      .limit(1)
      .exec(function (err, last) {
        if (err ||
        last.length === 0 ||
        (last[0] !== undefined &&
          last[0].artist !== value.artist &&
          last[0].song !== value.song
        )
        ) {
        // Previous song was different => save song!
          const history = new this.models.Histories(value)
          history.save()
        }
      })
  }
}

module.exports = Db