personal-website/docs/common/blog_utils.php

409 lines
11 KiB
PHP

<?php
class Blogpost
{
public $blogpost_id;
public $address;
public $title;
public $content;
public $date_posted;
public $date_edited;
public $tags;
public $comments;
/**
* Display the article, or a warning message.
*/
public function display_article(){
// Display the blog title and metadata
$body = "<article><table class=\"noborder-table\" style=\"width: 100%;
margin-top: 16px;\">";
$body .= sprintf("<tr><td style=\"padding: 0px;\">
<h2 style=\"margin-top: 0px;\">%s</h2></td>
<td class=\"blog-publish-date\">Published on: %s</td></tr><tr>
<td class=\"blog-tags\">", $this->title,
date("Y-m-d", strtotime($this->date_posted)));
// Display tags
for($i = 0; $i < count($this->tags); $i++) {
$tag = $this->tags[$i];
$body .= sprintf("
<span class=\"blog-tag\" style=\"background-color: %s\">
%s
</span>", $tag["color"], $tag["name"]);
}
// Display publish date and end metadata div
$body .= sprintf("</td><td class=\"blog-publish-date\">
Last edited on: %s</td></tr></table>",
date("Y-m-d", strtotime($this->date_edited)));
// Display hrule, article content and end the article
$body .= sprintf("</article><hr><article>%s</article>", $this->content);
return $body;
}
/**
* Display the comments for this post and their children.
*/
public function display_comments(){
$body = "<article>";
for($i = 0; $i < count($this->comments); $i++){
$body .= $this->comments[$i]->display_comment();
}
return $body."</article>";
}
/**
* Constructor for the blogpost.
* $blogpost_id GUID of the blogpost in the database.
* $address Readable address of the blogpost.
* $title Title of the blogpost.
* $content Content of the blogpost article.
* $date_posted Timestamp at publishing of article.
* $date_edited Timestamp at whioch the article was last edited.
* $tags Array of the tags this article has.
* $comments Array of Blogpostcomment objects,
* the comments of this article.
*/
public function __construct($blogpost_id, $address, $title,
$content, $date_posted, $date_edited, $tags, $comments){
$this->blogpost_id = $blogpost_id;
$this->address = $address;
$this->title = $title;
$this->content = $content;
$this->date_posted = $date_posted;
$this->date_edited = $date_edited;
$this->tags = $tags;
$this->comments = $comments;
}
}
class BlogpostComment
{
public $comment_id;
public $blogpost_id;
public $blogpost_addr;
public $poster_id;
public $poster_name;
public $parent_id;
public $timestamp;
public $content;
public $children;
/**
* Display the comment, and recursively it's children
*/
public function display_comment() {
$body = sprintf("
<div class=\"comment\" id=\"comment-%s\">
<div class=\"comment-own-wrapper\">
<span class=\"comment-author\"> By: %s </span>
<span class=\"comment-date\"> On: %s </span>
<label for=\"reveal-response-%s\" class=\"checkbox-button\">
Respond
</label>
<input type=\"checkbox\" id=\"reveal-response-%s\"
style=\"display: none;\">
<hr>
<div class=\"comment-content\">
%s
</div>
<div class=\"comment-response\">
<form method=\"post\"
action=\"http://www.zdenekborovec-dev.cz/blog/post_comment/\">
<input type=\"hidden\" name=\"blogpost_id\" value=\"%s\">
<input type=\"hidden\" name=\"referer\"
value=\"http://www.zdenekborovec-dev.cz/blog/article/%s\">
<input type=\"hidden\" name=\"parent_id\" value=\"%s\">
<label for=\"comment_entry\">Write response:</label>
<div class=\"centered-container\">
<textarea name=\"content\"
class=\"comment-box\"></textarea>
</div>
<input name=\"submit\" type=\"submit\" value=\"Send\">
</form>
</div>
</div>
<div class=\"comment-child-wrapper\">
",
$this->comment_id,
$this->poster_name,
date("Y-m-d H:i", strtotime($this->timestamp)),
$this->comment_id,
$this->comment_id,
$this->content,
$this->blogpost_id,
$this->blogpost_addr,
$this->comment_id);
if($this->children != null) {
for($i = 0; $i < count($this->children); $i++)
{
$child = $this->children[$i];
$body .= $child->display_comment();
}
}
return $body."</div></div>";
}
/**
* Load the child comments to this comment, and recursively their children.
*/
public function load_children($conn) {
// Prepare new statement for selecting all the child comments.
$stmt = $conn->prepare("SELECT comment_id, poster_id, timestamp,
content FROM blogpost_comments WHERE blogpost_id = :blogpost_id AND
parent_id = :comment_id ORDER BY timestamp ASC;");
// Bind and execute the comment select
$stmt->bindParam(":blogpost_id", $this->blogpost_id);
$stmt->bindParam(":comment_id", $this->comment_id);
$stmt->execute();
// Fetch the comments
$results_arr = $stmt->fetchall(PDO::FETCH_ASSOC);
$comments_arr = [];
// Prepare comment author selection statement
$stmt = $conn->prepare("SELECT username FROM users WHERE
user_id = :user_id;");
// Recursively fetch all the child comments
for($i = 0; $i < count($results_arr); $i++) {
$com = $results_arr[$i];
// If comment has a registered author, fetch their name
if($com["poster_id"]) {
$stmt->bindParam(":user_id", $com["poster_id"]);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
// If user was erased from database, set name to [Deleted]
if(!$result) {
$username = "[Deleted]";
}
else {
$username = $result["username"];
}
}
else {
$username = "[Guest]";
}
$commentObj = new BlogpostComment($com["comment_id"],
$com["poster_id"], $username, $this->blogpost_id,
$this->blogpost_addr, $com["timestamp"], $com["content"],
$this->comment_id);
$comments_arr[] = $commentObj;
$commentObj->load_children($conn);
}
$this->children = $comments_arr;
}
/**
* Constructor for the BlogpostComment object.
* $comment_id GUID of the comment.
* $poster_id GUID of the comment author.
* $poster_name Name of the comment author.
* $blogpost_id GUID of the blogpost this comment is under.
* $blogpost_addr Human-readable address of the blogpost this
comment is under.
* $timestamp Timestamp at comment creation.
* $content Content of the comment.
* $parent_id GUID of the comment this is a reply to (or NULL).
*/
public function __construct($comment_id, $poster_id, $poster_name,
$blogpost_id, $blogpost_address, $timestamp, $content, $parent_id) {
$this->comment_id = $comment_id;
$this->blogpost_id = $blogpost_id;
$this->blogpost_addr = $blogpost_address;
$this->poster_id = $poster_id;
$this->poster_name = $poster_name;
$this->timestamp = $timestamp;
$this->content = $content;
$this->parent_id = $parent_id;
}
}
/**
* Load comments under a given blog.
* Returns array of BlogpostComment objects.
*/
function load_comments($conn, $blogId, $blogAddress) {
// Prepare new statement for selecting all the child comments.
$stmt = $conn->prepare("SELECT comment_id, poster_id, timestamp,
content FROM blogpost_comments WHERE blogpost_id = :blogpost_id
AND parent_id IS NULL ORDER BY timestamp ASC;");
// Bind and execute the comment select
$stmt->bindParam(":blogpost_id", $blogId);
$stmt->execute();
// Fetch the comments
$results_arr = $stmt->fetchall(PDO::FETCH_ASSOC);
$comments_arr = [];
// Prepare comment author selection statement
$stmt = $conn->prepare("SELECT username FROM users WHERE
user_id = :user_id;");
// Recursively fetch all the child comments
for($i = 0; $i < count($results_arr); $i++) {
$com = $results_arr[$i];
// If comment has a registered author, fetch their name
if($com["poster_id"]) {
$stmt->bindParam(":user_id", $com["poster_id"]);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
// If user was erased from database, set name to [Deleted]
if(!$result) {
$username = "[Deleted]";
}
else {
$username = $result["username"];
}
}
else {
$username = "[Guest]";
}
$commentObj = new BlogpostComment($com["comment_id"], $com["poster_id"],
$username, $blogId, $blogAddress, $com["timestamp"],
$com["content"], NULL);
$commentObj->load_children($conn);
$comments_arr[] = $commentObj;
}
return $comments_arr;
}
function get_blogpost_address($conn, $blogId) {
// Prepare and bind the statement for selecting address
$stmt = $conn->prepare("SELECT readable_address FROM
blogposts WHERE blogpost_id = :blogpost_id");
$stmt->bindParam(":blogpost_id", $blogId);
// Execute the statement
$stmt->execute();
// Fetch the blogpost address
$result = $stmt->fetch(PDO::FETCH_ASSOC);
// If no blogpost with the given GUID was found, return null.
if(!$result) {
return null;
}
// Return the blogpost address.
return $result["readable_address"];
}
/**
* Load info about the blog with a given guid and return corresponding
* Blogpost object. NULL if blog couldn't be loaded.
*/
function load_blog($conn, $blogId){
// Prepare and bind statement for gathering blogpost info
$stmt = $conn->prepare("SELECT readable_address, title, content,
date_posted, date_edited FROM blogposts WHERE
blogpost_id = :blogpost_id;");
$stmt->bindParam(":blogpost_id", $blogId);
// Execute the statement
$stmt->execute();
// Fetch the blogpost
$result = $stmt->fetch(PDO::FETCH_ASSOC);
// If no post with given guid was found,
// there is no information to gather, return.
if(!$result){
return null;
}
// Prepare new statement for selecting the tags for a given blogpost
$stmt = $conn->prepare("SELECT name, color FROM
blogpost_tags INNER JOIN blogpost_has_tag ON
blogpost_tags.tag_id = blogpost_has_tag.tag_id WHERE
blogpost_id = :blogpost_id;");
// Bind and execute the tag select
$stmt->bindParam(":blogpost_id", $blogId);
$stmt->execute();
// Fetch the tags
$tags_arr = $stmt->fetchall(PDO::FETCH_ASSOC);
// Set the variables
$blogTitle = $result["title"];
$blogAddress = $result["readable_address"];
$blogContent = $result["content"];
$datePosted = $result["date_posted"];
$dateEdited = $result["date_edited"];
$tags = $tags_arr;
$comments = load_comments($conn, $blogId, $blogAddress);
return new Blogpost($blogId, $blogAddress, $blogTitle, $blogContent,
$datePosted, $dateEdited, $tags, $comments);
}
function generate_article($conn, $fp, $blogId) {
// Attempt to load the blogpost
$blogPost = load_blog($conn, $blogId);
if(!$blogPost) {
return false;
}
fprintf($fp,
"<?php
\$COMMONS = \$_SERVER['DOCUMENT_ROOT'] . \"/../common\";
include_once(\$COMMONS.\"/header.php\");
display_header(\"%s\");
echo \"%s\";
?>
<hr style=\"border-style: solid;\">
<article>
<h2> Comments: </h2>
<form method=\"post\"
action=\"http://www.zdenekborovec-dev.cz/blog/post_comment/\">
<input type=\"hidden\" name=\"blogpost_id\" value=\"%s\">
<input type=\"hidden\" name=\"referer\"
value=\"http://www.zdenekborovec-dev.cz/blog/article/%s\">
<label for=\"comment_entry\">Write a comment (<?php
echo isset(\$_SESSION[\"current_user\"]) ?
\$_SESSION[\"current_user\"]->user_name:
\"Guest\";
?>
):</label>
<div class=\"centered-container\">
<textarea name=\"content\" class=\"comment-box\"
tabindex=\"1\"></textarea>
</div>
<input name=\"submit\" type=\"submit\" tabindex=\"2\"
value=\"Send\">
</form>
</article>
<?php
echo \"%s\";
include_once(\$COMMONS.\"/footer.php\");
?>
",
$blogPost->title,
addslashes($blogPost->display_article()),
$blogPost->blogpost_id,
$blogPost->address,
addslashes($blogPost->display_comments()));
return true;
}
?>