const { default: initModels } = require("./models/init-models");

module.exports = {
  /**
   * Grabs the actual row information as JSON
   * and packs it up into an array
   *
   * @param {array} postList
   * @param {string} typeToFind
   * @returns array
   */
  getPostData: (postList, typeToFind) => {
    return postList.reduce((data, post) => {
      /**
       * Double-check our post matches the type
       */
      if (typeToFind && post.dataValues.post_type != typeToFind) {
        return data;
      }

      /**
       * ONLY add matching postData to our data array
       * and omit all the extra sequelize meta data
       * by pushing the dataValues key
       */
      data.push(post.dataValues);
      return data;
    }, []);
  },

  /**
   * Helper to find post descendants
   *
   * @param {array} parentList
   * @param {object} db - sequelize instance
   * @param {function} getParams - lambda returning param object { rule: 'example' }
   * @returns array
   */
  findDescendants: async (parentList, db, getParams) => {
    const matchList = [];
    for (let post of parentList) {
      const match = await db.findAll({ where: getParams(post) });
      match.forEach((entity) => matchList.push(entity));
    }
    return matchList;
  },

  /**
   * The keys we want from the postmeta table
   */
  metakeys: [
    "_wp_attached_file",
    "_wp_attachment_metadata",
    "_thumbnail_id",
    ...JSON.parse(process.env.METAKEYS),
  ],

  /**
   * The post type names we're interested in
   *
   * 1. Status types we migrate
   */
  types: {
    ...JSON.parse(process.env.POST_TYPES),
    /* 1 */
    status: ["publish"],
  },

  /**
   * dB creation helper
   * !: Don't touch
   *
   * @param {object} models - sequelize instance
   * @returns object - all models associated with instance
   */
  db: (models) => initModels(models),
};