const slug = require("slug");

const {
    Model
} = require('sequelize');
module.exports = (sequelize, DataTypes) => {
    class Article extends Model {
        /**
         * Helper method for defining associations.
         * This method is not a part of Sequelize lifecycle.
         * The `models/index` file will call this method automatically.
         */
        static associate(models) {
            /* define association here */
        }
    }
    Article.init({
        article_id: { type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true, allowNull: false },
        article_slug: { type: DataTypes.STRING, allowNull: false },
        article_title: { type: DataTypes.STRING, allowNull: false },
        article_description: { type: DataTypes.TEXT },
        article_body: { type: DataTypes.TEXT, allowNull: false }
    }, {
        sequelize,
        timestamps: false,
        modelName: 'Article',
        tableName: 'article',
        createdAt: true,
        updatedAt: true
    });

    Article.beforeValidate((article) => {
        article.slug = slug(article.title) + '-' + (Math.random() * Math.pow(36, 6) | 0).toString(36);
    });

    Article.prototype.toJSONFor = function () {
        return {
            id: this.article_id,
            slug: this.article_slug,
            title: this.article_title,
            description: this.article_description,
            body: this.article_body
        };
    };

    return Article;
};