Nodezzarella/classes/Controllers/Categories.class.js

const log         = require('color-logs')(true, true, "Categories.class.js"),
      path        = require('path'),
      hbs         = require('handlebars'),
      promise     = require('promise'),
      dbConnector = require('../../lib/db/'+config.db+"/db.js");
      fs          = require("fs"),
      Categorie   = require('../Categorie.class.js');
      Article     = require('../Article.class.js');

hbs.registerHelper('listArticle', function(tabs, options) {
    var i = 1;
    var out = '';
    log.debug();
    var articles = options['data']['root'].getArticles(); 
    articles.shift();
    log.debug(articles);
    for(var x in articles){
        out = out + "" + options.fn(articles[x]) + "";  
        if(i == 3){
            i= 1;
            out = out + "</div><div class=\"row\">";
        }
        else{
            i++;
        }
    }
    return out;
});

hbs.registerHelper('disclamer', function(tabs, options) {
    return options.fn(options['data']['root'].getArticles()[0]) + ""; 
});

hbs.registerHelper('listNav', function(tabs, options) {
    var out = '';
    for(var x in options['data']['root']){
        out = out + "" + options.fn(options['data']['root'][x]) + "";
        
    }
    return out;
});

hbs.registerHelper('article', function(tabs, options) {
    var out = '';
    for(var x in options['data']['root']){
        out = out + "" + options.fn(options['data']['root'][x]) + "";
        
    }
    return out;
});

class Categories {
    
    /**
     * 
     * @returns {<Promise>} html : the html code of navbar
     */
    getNav(){
        var db = new dbConnector();
        return db.get({
            "select" : {
                "categories" : [
                    "title",
                    "uri",
                    "description"
                ]
            },
            "condition" : "",
            "join": ""
        }).then((result) => {
            return new Promise((resolve, reject) => {
                fs.readFile('./views/_nav.hbs', 'utf-8', (error, source) => {
                    hbs.registerHelper('nav', (nav) =>{
                        return nav;
                    });
                    var template = hbs.compile(source);
                    var html = template(JSON.parse(result));
                    resolve(html);
                });
            });
        }).catch((err) => {
            throw err;
        });
    }
    
    /**
     * hydrate global var
     * @param {type} select : object of select {id = id}
     * @returns {Promise} data of categories
     */    
    getCategorie(select){
        var db = new dbConnector();
        return db.get({
            "select" : {
                "categories" : [
                    "id",
                    "title",
                    "uri",
                    "description"
                ]
            },
            "condition" : select,
            "join" : ""
        }).then((result) =>  {
            return new Promise((resolve, reject) => {
                var data = JSON.parse(result);
                result = null;
                var categorie = new Categorie(data[0].id, data[0].title, data[0].uri, data[0].description);
                resolve(categorie);
            });
        }).catch((err) => {
            throw err;
        });
    }
    
    /**
     * 
     * @param {<Categorie>} categorie : object categorie
     * @param {string} returnFormat : format of return [object, json, html]
     * @returns {<Promise> listArticleToHTML} a list of article in HTML format
     */
    getListArticles(categorie, returnFormat){
        var db = new dbConnector();
        return db.get({
            "select" : {
                "articles" : [
                    "id",
                    "title",
                    "slug",
                    "author",
                    "date",
                    "img",
                    "categorie_id"
                ]
            },
            "condition" : {
                "categorie_id" : categorie.getId()
            },
            "join" : ""
        }).then((result) => {
            return new Promise((resolve) => {
                var data = JSON.parse(result);
                for(var i in data){
                    categorie.setArticle(new Article(data[i].id,data[i].title, data[i].author, data[i].date, data[i].img, data[i].slug, data[i].categorie_id));
                    categorie.getArticles()[i].setCategorieName(categorie.getTitle());
                }
                switch(returnFormat){
                    case 'html':
                        resolve(this.listArticlesToHTML(categorie));
                        break;
                    case 'json':
                        break;
                    case 'object':
                        break;
                }
                
                
            });
        });
    }
    
    getHomeListArticles(returnFormat){
        var db = new dbConnector();
        return db.get({
            "select" : {
                "articles" : []
            },
            "condition" : "",
            "join" : {
                "left" : "categorie_id",
                "right" : {
                    "db" : "categories",
                    "index" : "id"
                }
            }
        }).then((result) => {
            return new Promise((resolve) => {
                var data = JSON.parse(result);
                //log.debug(data);
                var categorie = new Categorie(0, "home", "/", "home");
                for(var i in data){
                    categorie.setArticle(new Article(data[i].left.id,data[i].left.title, data[i].left.author, data[i].left.date, data[i].left.img, "/"+data[i].right.uri+"/"+data[i].left.slug, data[i].left.categorie_id));
                    categorie.getArticles()[i].setCategorieName(data[i].right.title);
                }
                switch(returnFormat){
                    case 'html':
                        resolve(this.listArticlesToHTML(categorie));
                        break;
                    case 'json':
                        break;
                    case 'object':
                        break;
                }
                    
                
                
            });
        });
    }
    /**
     * 
     * @param {<Categorie>} categorie : object categorie
     * @returns {<Promise>} a list of article in HTML format
     */
    listArticlesToHTML(categorie){
        return new Promise((resolve, reject) => {
            fs.readFile('./views/articles/list.hbs', 'utf-8', (error, source) => {
                hbs.registerHelper('articles', (articles) =>{
                    return articles;
                });
                var template = hbs.compile(source);
                var html =  template(categorie);
                resolve(html);
            });
        });
    }
    
    /**
     * 
     * @param {<Categorie>} categorie : object categorie
     * @param {string} uri the uri of article
     * @returns {<Promise>} a compiled article in HTML
     */
    getArticle(categorie, uri){
        var db = new dbConnector();
        return db.get({
            "select" : {
                "articles" : [
                    "id",
                    "title",
                    "slug",
                    "author",
                    "date",
                    "img",
                    "categorie_id",
                    "content"
                ]
            },
            "condition" : {
                "categorie_id" : categorie.getId(),
                "slug" : uri
            },
            "join" : ""
        }).then((result) => {
            return new Promise((resolve) => {
                var data = JSON.parse(result);
                categorie.setArticle(new Article(data[0].id,data[0].title, data[0].author, data[0].date, data[0].img, data[0].slug, data[0].categorie_id, data[0].content));
                fs.readFile('./views/articles/article.hbs', 'utf-8', (error, source) => {
                    if(error){
                        log.error(error);
                    }
                    hbs.registerHelper('displayArticle', (article) =>{
                        return article;
                    });
                    var template = hbs.compile(source);
                    var html = template(categorie.getArticles());
                    resolve(html);
                });
            })
        })
    }    
}

module.exports = Categories;