const slugify = require("slugify");

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({
        articleId: { type: DataTypes.INTEGER, primaryKey: true, autoIncrement: true, allowNull: false },
        slug: { type: DataTypes.STRING, allowNull: false },
        title: { type: DataTypes.STRING, allowNull: false },
        description: { type: DataTypes.TEXT },
        body: { type: DataTypes.TEXT, allowNull: false }
    }, {
        sequelize,
        timestamps: false,
        modelName: 'Article',
        tableName: 'article',
        createdAt: true,
        updatedAt: true
    });

    Article.beforeValidate((article) => {
        article.slug = slugify(article.title, { lower: true });
    });

    Article.prototype.toJSONFor = function () {
        return {
            articleId: this.articleId,
            slug: this.slug,
            title: this.title,
            description: this.description,
            body: this.body
        };
    };

    return Article;
};