Personal blog written from scratch using Node.js, Bootstrap, and MySQL.
https://jrtechs.net
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193 lines
5.2 KiB
193 lines
5.2 KiB
const mysql = require('mysql');
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const sanitizer = require('sanitizer');
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var Promise = require('promise');
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const con = mysql.createConnection({
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host: "localhost",
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user: "blog_user",
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password: "password",
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database: "blog_name"
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});
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con.connect(function(err) {
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if (err) throw err;
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console.log("Connected!");
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});
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/**
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* Function used to query the database for records
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*
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* @param sqlStatement
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* @returns {Array}
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*/
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var fetch = function(sqlStatement)
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{
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return new Promise(function(resolve, reject)
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{
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con.query(sqlStatement, function (err, result)
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{
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if (err)
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{
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reject();
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}
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resolve(result);
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});
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});
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};
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module.exports=
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{
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/**
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* Function used to use insert statements into the database
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*
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* Don't worry, the input gets sanitized
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*
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* @param sqlStatement
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* @return the id of the new record - if there is one
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*/
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insert : function(sqlStatement)
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{
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return new Promise(function(resolve, reject)
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{
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con.query(sanitizer.sanitize(sqlStatement), function (err, result)
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{
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if (err)
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{
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console.log(err);
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resolve(0);
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}
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resolve(result.insertId);
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});
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})
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},
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/**
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* Not to be mistaken for getPostData() in @file utils/utils.js,
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* this function extracts a post entry from the sql server
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*
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* @param requestURL url user used to request blog post
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* @return {*} the entry found in the data base -- if any
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*/
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getPost : function(requestURL)
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{
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return new Promise(function(resolve, reject)
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{
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var splitURL = requestURL.split("/")
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var q = "select * from categories where url='" + splitURL[1] + "'";
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fetch(q).then(function (result_category)
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{
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if(result_category.length != 0)
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{
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var q2 = "select * from posts where category_id='" + result_category[0].category_id +
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"' and url='" + splitURL[2] + "'";
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fetch(q2).then(function (result_posts)
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{
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if(result_posts != 0)
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{
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resolve(result_posts[0]);
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}
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else
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{
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resolve(0);
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}
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});
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}
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else
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{
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resolve(0);
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}
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});
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});
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},
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/**
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* Function used to retrieve all categories when making the sidebar
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*
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* @return {Promise<Response> | * | Array}
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*/
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getCategories : function()
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{
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var q = "select * from categories";
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return fetch(q);
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},
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/**
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* Function which currently returns all posts of a particular category from the database
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* @param requestURL
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* @return {*|Promise}
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*/
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getPostsFromCategory: function(requestURL)
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{
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return new Promise(function(resolve, reject)
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{
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var q = "select * from categories where name ='" + requestURL + "' limit 1";
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fetch(q).then(function(categories)
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{
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if(categories.length != 0)
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{
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var qPosts = "select * from posts where category_id='" + categories[0].category_id + "'";
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resolve(fetch(qPosts));
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}
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else
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{
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resolve(0);
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}
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});
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});
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},
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/**
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* Helper method which returns a list of objects which contains the url and name of thee ten most recent posts
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*
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* {[name: , url: ],[name: , url: ],[name: , url: ],...}
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*
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* @return {*|Promise}
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*/
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getRecentPosts: function()
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{
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return new Promise(function(resolve, reject)
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{
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var q = "select name,url, category_id from posts order by post_id desc limit 10";
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fetch(q).then(function(sqlPosts)
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{
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var promises = [];
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sqlPosts.forEach(function(post)
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{
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promises.push(new Promise(function(res, rej)
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{
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var getCategory = "select url from categories where category_id='" + post.category_id + "'";
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fetch(getCategory).then(function(urls)
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{
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var obj = new Object();
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obj.name = post.name;
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obj.url = post.url;
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obj.category = urls[0].url;
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res(obj);
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});
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}));
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});
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Promise.all(promises).then(function(goodies)
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{
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resolve(goodies);
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});
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});
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});
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},
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getPopularPosts: function()
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{
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return new Promise(function(resolve, reject)
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{
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var q = "select * from popular_posts";
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fetch(q).then(function(sqlPosts)
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{
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});
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});
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}
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};
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