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Post.php
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Post.php
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<?php
declare(strict_types=1);
namespace Ilyamur\PhpMvc\Models;
use PDO;
use Ilyamur\PhpMvc\Service\Auth;
use Ilyamur\PhpMvc\Models\Hashtag;
/**
* Post model
*
* PHP version 8.0
*/
class Post extends BaseModel
{
/**
* Image type for uploading
*
* @var string
*/
protected const IMAGE_TYPE = 'coverImage';
/**
* Error messages
*
* @var array
*/
public array $errors = [];
/**
* Posts hashtags
*
* @var array
*/
public array $hashtags = [];
/**
* Class constructor
*
* @param array $data Initial property values (optional)
* @param array $imgsData uploaded image data (optional)
*
* @return void
*/
public function __construct(array $data = [], array $imgsData = [])
{
foreach ($data as $key => $val) {
$this->$key = htmlspecialchars($val);
}
foreach ($imgsData as $key => $val) {
$this->file[$key] = $val;
}
// parse hashtags from post body
$this->parseHashtagsFromBody();
}
/**
* Finding hashtags in the post body by regexp
*
* @return void
*/
private function parseHashtagsFromBody(): void
{
preg_match_all(Hashtag::HASHTAG_REGEXP, $this->body, $this->hashtags);
}
/**
* Validate post
*
* @return void
*/
protected function validate(): void
{
if (trim($this->title) === '') {
$this->errors[] = 'Title is required';
}
if (trim($this->body) === '') {
$this->errors[] = 'Posts body is required';
}
}
/**
* Validate posts image
*
* @return void
*/
private function validateInputImage(): void
{
switch ($this->file[static::IMAGE_TYPE]['error']) {
case UPLOAD_ERR_OK:
break;
case UPLOAD_ERR_NO_FILE:
$this->errors[] = 'No file uploaded';
break;
case UPLOAD_ERR_INI_SIZE:
$this->errors[] = 'File is too large';
break;
default:
$this->errors[] = 'File not uploaded';
}
$finfo = finfo_open(FILEINFO_MIME_TYPE);
$mimeType = finfo_file($finfo, $this->file[static::IMAGE_TYPE]['tmp_name']);
// validation of uploaded file by allowed image types
if (!in_array($mimeType, static::MIME_TYPES)) {
$this->errors[] = 'Invalid format';
}
// checking image size
if ($this->file[static::IMAGE_TYPE]['size'] > 250000) {
$this->errors[] = 'File is too large';
}
}
/**
* Save posts to db
*
* @return bool
*/
public function save(): bool
{
$this->validate();
$isFileUploaded = file_exists($this->file[static::IMAGE_TYPE]['tmp_name']);
if ($isFileUploaded) {
$this->validateInputImage();
}
if (empty($this->errors)) {
if ($isFileUploaded) {
$this->generateUploadDestination();
$imgUrl = AWS_STORING ? $this->saveToS3(type: 'coverImage') : $this->file['destination'];
} else {
$imgUrl = null;
}
$sql = 'INSERT INTO posts (title, body, user_id, cover_link)
VALUES (:title, :body, :user_id, :cover_link)';
$db = static::getDB();
$stmt = $db->prepare($sql);
$stmt->bindValue(':title', $this->title, PDO::PARAM_STR);
$stmt->bindValue(':body', $this->body, PDO::PARAM_STR);
$stmt->bindValue(':user_id', Auth::getUser()->id, PDO::PARAM_INT);
$stmt->bindValue(':cover_link', $imgUrl, PDO::PARAM_STR);
return $stmt->execute() && Hashtag::save($this, (int) $db->lastInsertId());
}
return false;
}
/**
* Get posts from db
*
* @param array $page Page number (optional)
* @param array $limit Pagination limit per page (optional)
*
* @return array
*/
public static function getPosts(int $page = 1, int $limit = 3): array
{
$db = static::getDB();
$offset = $limit * ($page - 1);
$result = $db->query(
"SELECT title, body,
p.id AS id,
u.id AS authorId,
p.cover_link AS url,
p.created_at AS createdAt,
u.created_at AS authorRegDate,
u.name AS author
FROM posts AS p
JOIN users AS u
ON u.id = p.user_id
ORDER BY createdAt DESC
LIMIT $limit
OFFSET $offset"
);
$posts = $result->fetchAll(PDO::FETCH_CLASS, static::class);
foreach ($posts as $post) {
$post->insertLinksToHashtags();
}
return $posts;
}
/**
* Get specific post from db by id
*
* @param int $postsId Post id
*
* @return array
*/
public static function findById(int $postsId): ?Post
{
$sql = 'SELECT
u.name AS author,
p.*
FROM posts AS p
JOIN users AS u
ON p.user_id = u.id
WHERE p.id = :id';
$db = static::getDB();
$stmt = $db->prepare($sql);
$stmt->bindValue('id', $postsId, PDO::PARAM_INT);
$stmt->execute();
$stmt->setFetchMode(PDO::FETCH_CLASS, static::class);
$post = $stmt->fetch();
if ($post) {
$post->insertLinksToHashtags();
return $post;
}
return null;
}
/**
* Get total posts count
*
* @param int $postsId Post id
*
* @return mixed
*/
public static function getTotalCount(): string|false
{
$result = static::getDB()->query('SELECT count(id) AS total FROM posts');
return $result->fetchColumn();
}
public function update(array $data, array $imgsData): bool
{
// handle original hashtags
$this->parseHashtagsFromBody();
$originalHashtags = $this->hashtags;
$this->title = htmlspecialchars($data['title']);
$this->body = htmlspecialchars($data['body']);
// handle new hashtags
$this->parseHashtagsFromBody();
// select deleted tags
$deletedTags = array_filter($originalHashtags[0], fn ($tag) => !in_array($tag, $this->hashtags[0]));
foreach ($imgsData as $key => $val) {
$this->file[$key] = $val;
}
$this->validate();
$isFileUploaded = file_exists($this->file[static::IMAGE_TYPE]['tmp_name']);
if ($isFileUploaded) {
$this->validateInputImage();
}
if (empty($this->errors)) {
if ($isFileUploaded) {
$this->generateUploadDestination();
$imgUrl = AWS_STORING ? $this->saveToS3(type: static::IMAGE_TYPE) : $this->file['destination'];
}
$sql = "UPDATE posts
SET title = :title, body = :body";
if (isset($imgUrl)) {
$sql .= ', cover_link = :cover_link';
}
$sql .= " WHERE id = :id";
$db = static::getDB();
$stmt = $db->prepare($sql);
$stmt->bindValue('title', $this->title, PDO::PARAM_STR);
$stmt->bindValue('body', $this->body, PDO::PARAM_STR);
$stmt->bindValue('id', $this->id, PDO::PARAM_INT);
if (isset($imgUrl)) {
$stmt->bindValue('cover_link', $imgUrl, PDO::PARAM_STR);
}
$isCorrect = $stmt->execute();
if (
isset($this->cover_link) &&
isset($imgUrl) &&
$isCorrect
) {
static::deleteFromStorage($this->cover_link, static::IMAGE_TYPE);
}
return ($isCorrect && Hashtag::save(post: $this, postId: (int) $this->id, deletedTags: $deletedTags));
}
return false;
}
/**
* Delete specific post
*
* @return bool
*/
public function delete(): bool
{
$sql = 'DELETE FROM posts
WHERE id = :id';
$db = static::getDB();
$stmt = $db->prepare($sql);
$stmt->bindValue('id', $this->id, PDO::PARAM_INT);
$isCorrect = $stmt->execute();
if (isset($this->cover_link) && $isCorrect) {
static::deleteFromStorage($this->cover_link, static::IMAGE_TYPE);
}
return $isCorrect;
}
/**
* Find specific post by its hashtag
*
* @return array
*/
public static function findPostsByHashtag(string $hashtag): array
{
$sql = 'SELECT DISTINCT title, body,
p.id AS id,
p.user_id AS authorId,
p.created_at AS createdAt,
(SELECT users.name FROM users WHERE users.id = p.user_id) AS author
FROM posts AS p
JOIN hashtags_posts AS hp
ON p.id = hp.post_id
JOIN hashtags AS h
ON hp.hashtag_id = h.id
JOIN users AS u
ON u.id = p.user_id
WHERE h.hashtag = :hashtag';
$db = static::getDB();
$stmt = $db->prepare($sql);
$stmt->bindValue('hashtag', strtolower($hashtag), PDO::PARAM_STR);
$stmt->execute();
$posts = $stmt->fetchAll(PDO::FETCH_CLASS, static::class);
foreach ($posts as $post) {
$post->insertLinksToHashtags();
}
return $posts;
}
/**
* Insert <a> tags to posts body
*
* @return void
*/
protected function insertLinksToHashtags(): void
{
$this->body = preg_replace(Hashtag::HASHTAG_REGEXP, '<a href="/hashtags/show/$1">#$1</a>', $this->body);
}
}