const mysql = require("mysql");

const config = require("../config");

let connection = mysql.createConnection(config.dwelling.database);

// This code was taken from https://www.npmjs.com/package/mysql#custom-format
// Only fourth line was changed.
connection.config.queryFormat = function (query, values) {
	if (!values) return query;
	return query.replace(/\:(\w+)/g, function (txt, key) {
		if (values[key] !== undefined)
			return this.escape(values[key]);
		return txt;
	}.bind(this));
};

exports.closeConnection = () => connection.end();

exports.getPosts = category => {
    return new Promise((resolve, reject) => {
        let query = "\
        SELECT\
            `blog`.`entry_id` AS `post_id`,\
            `blog`.`date`,\
            `blog`.`title`,\
            `blog`.`body`\
        FROM `blog`\
        LEFT JOIN `blog_categories` ON `blog_categories`.`category_id` = `blog`.`category`\
        WHERE `blog_categories`.`category` = :category\
        ORDER BY `blog`.`date` DESC;";

        connection.query(query, { category: category }, (err, results) => {
            if (err) reject(err);
            resolve(results); });
    });
};

exports.getPostsForRSS = () => {
    return new Promise((resolve, reject) => {
        let query = "\
        SELECT\
            `blog`.`entry_id` AS `post_id`,\
            `blog`.`date`,\
            `blog_categories`.`category`,\
            `blog`.`title`,\
            `blog`.`body`\
        FROM `blog`\
        LEFT JOIN `blog_categories` ON `blog_categories`.`category_id` = `blog`.`category`\
        ORDER BY `blog`.`date` DESC;";

        connection.query(query, (err, results) => {
            if (err) reject(err);
            resolve(results); });
    });
};