more object-oriented approach
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a1075b0d5e
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3 changed files with 138 additions and 65 deletions
15
docs/common/utils.php
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15
docs/common/utils.php
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<?php
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/**
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* Sanitize a given input string to be safe to display and process.
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*/
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function sanitize_input($data) {
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// Remove unnecessary whitespace characters
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$data = trim($data);
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// Remove backslashes
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$data = stripslashes($data);
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// Escape all special characters to HTML entities
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$data = htmlspecialchars($data);
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return $data;
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}
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?>
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@ -1,32 +1,95 @@
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<?php
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// Declare global variables for the blog content
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$blogTitle = $blogContent = $datePosted = $tags = "";
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$blogId = $_GET["guid"];
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$COMMONS = $_SERVER['DOCUMENT_ROOT'] . "/../common";
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include_once($COMMONS."/header.php");
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include_once($COMMONS."/utils.php");
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// Try to get info about blog
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if($blogId)
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get_blog_info();
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class BlogpostComment
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{
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public $comment_id;
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public $parent_id;
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public $blogpost_id;
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public $poster_id;
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public $timestamp;
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public $content;
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}
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// Display the header with title being the blog name, or not found message.
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display_header($blogTitle ? $blogTitle : "Article not found");
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class Blogpost
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{
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public $blogpost_id;
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public $title;
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public $content;
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public $date_posted;
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public $tags;
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/**
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* Display the article, or a warning message.
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*/
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function display_article(){
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// If a blog with given ID was not found display warning message.
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if(!$this->title){
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printf("
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<article>
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<h2> Article not found </h2>
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<hr>
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<p>
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I am sorry, but I couldn't find an article with this ID.
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</p>
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</article>
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");
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return;
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}
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// Begin the article
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printf("<article>");
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// Display the blogpost name
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printf("<h2>%s</h2>", $this->title);
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// Display the blog metadata
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printf("<div class=\"blog-metadata\">");
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// Display tags
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for($i = 0; $i < count($this->tags); $i++) {
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$tag = $this->tags[$i];
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printf("
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<span class=\"blog-tag\" style=\"background-color: %s\">
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%s
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</span>", $tag["color"], $tag["name"]);
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}
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// Display publish date and end metadata div
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printf("<span class=\"blog-publish-date\">Published on: %s</span></div>",
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date("Y-m-d", strtotime($this->date_posted)));
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// Display hrule, article content and end the article
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printf("</article><hr><article>%s</article>", $this->content);
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}
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/**
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* Constructor for the blogpost.
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* $blogpost_id GUID of the blogpost in the database.
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* $title Title of the blogpost.
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* $content Content of the blogpost article.
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* $date_posted Timestamp at publishing of article.
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* $tags Array of the tags this article has.
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*/
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public function __construct($blogpost_id, $title, $content,
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$date_posted, $tags){
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$this->blogpost_id = $blogpost_id;
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$this->title = $title;
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$this->content = $content;
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$this->date_posted = $date_posted;
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$this->tags = $tags;
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}
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}
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/**
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* Try to load info about the blog with guid in GET and set global
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* variables accordingly.
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*/
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function get_blog_info(){
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// Access global variables
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global $conn;
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global $blogTitle;
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global $blogContent;
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global $datePosted;
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global $tags;
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global $blogId;
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function get_blog_info($conn, $blogId){
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// Check DB connection
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if($conn == null){
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printf("
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@ -53,7 +116,7 @@ function get_blog_info(){
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// If no post with given guid was found,
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// there is no information to gather, return.
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if(!$result){
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return;
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return null;
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}
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// Prepare new statement for selecting the tags for a given blogpost
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@ -74,47 +137,53 @@ function get_blog_info(){
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$blogContent = $result["content"];
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$datePosted = $result["date_posted"];
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$tags = $tags_arr;
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return new Blogpost($blogId, $blogTitle, $blogContent, $datePosted, $tags);
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}
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// If a blog with given ID was not found display warning message and die.
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if(!$blogTitle){
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/**
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* Display all the comments responding to a given article.
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*/
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function display_comments($conn, $blogId){
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// Check DB connection
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if($conn == null){
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printf("
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<article>
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<h2> Article not found </h2>
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<hr>
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<p>
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I am sorry, but I couldn't find an article with this ID.
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</p>
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</article>
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");
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include_once($COMMONS."/footer.php");
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die();
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<h1>
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Failed to load comments due to database connection error!
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</h1>
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If you see this error in production,
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please shoot me an email with helpful details.
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</article>");
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return;
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}
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// Prepare statement for selecting all coments replying to a given article.
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$stmt = $conn->prepare("SELECT;");
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// Bind and execute the tag select
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$stmt->bindParam(":blogpost_id", $blogId);
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$stmt->execute();
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// Fetch the tags
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$tags_arr = $stmt->fetchall(PDO::FETCH_ASSOC);
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}
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// Begin the article
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printf("<article>");
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// Get the blog id.
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$blogId = sanitize_input($_GET["guid"]);
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// Display the blogpost name
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printf("<h2>%s</h2>", $blogTitle);
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// Display the blog metadata
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printf("<div class=\"blog-metadata\">");
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// Display tags
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for($i = 0; $i < count($tags); $i++) {
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$tag = $tags[$i];
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printf("
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<span class=\"blog-tag\" style=\"background-color: %s\">
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%s
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</span>", $tag["color"], $tag["name"]);
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$blogPost = null;
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// Try to get info about blog
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if($blogId) {
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$blogPost = get_blog_info($conn, $blogId);
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}
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// Display publish date and end metadata div
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printf("<span class=\"blog-publish-date\">Published on: %s</span></div>",
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date("Y-m-d", strtotime($datePosted)));
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// Display the header with title being the blog name, or not found message.
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display_header($blogPost ? $blogPost->title : "Article not found");
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// Display hrule, article content and end the article
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printf("</article><hr><article>%s</article>", $blogContent);
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// Display the blog
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$blogPost->display_article();
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include_once($COMMONS."/footer.php");
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?>
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@ -2,25 +2,14 @@
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$COMMONS = $_SERVER['DOCUMENT_ROOT'] . "/../common";
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include_once($COMMONS."/header.php");
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include_once($COMMONS."/utils.php");
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display_header("Login");
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// Define previous attempt and error variables and set to empty values.
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$emailOld = $passwordOld = "";
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$emailErr = $passwordErr = "";
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/**
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* Sanitize a given input string to be safe to display and process.
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*/
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function sanitize_input($data) {
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// Remove unnecessary whitespace characters
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$data = trim($data);
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// Remove backslashes
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$data = stripslashes($data);
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// Escape all special characters to HTML entities
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$data = htmlspecialchars($data);
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return $data;
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}
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/**
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* Process the information, and if there are no errors, log the user in.
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*/
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