personal-website/docs/www/blog/blogpostcomment.php

<?php
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=\"%s\">
				<input type=\"hidden\" name=\"blogpost_id\" value=\"%s\">
				<input type=\"hidden\" name=\"address\" value=\"%s\">
				<input type=\"hidden\" name=\"comment_id\" value=\"%s\">
				<label for=\"comment_entry\">Write response:</label>
				<div class=\"centered-container\">
					<textarea name=\"comment_entry\"
					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,
				$this->content,
				htmlspecialchars($_SERVER["PHP_SELF"]),
				$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;
	}
}
?>