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',
        ...process.env.METAKEYS
    ],

    /**
     * The post type names we're interested in
     *
     * 1. Status types we migrate
     */
    types: {
        ...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),
}