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<?php |
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namespace App\Models; |
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use Core\Container; |
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use Core\Model; |
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class TagModel extends Model |
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{ |
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private $tagAssoTbl; |
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private $tagTbl; |
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public function __construct(Container $container) |
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{ |
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parent::__construct($container); |
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$this->tagAssoTbl = $this->getTablePrefix("posts_has_tags"); |
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$this->tagTbl = $this->getTablePrefix("tags"); |
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} |
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/** |
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* check if post has a specific tag |
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* @param int $postId |
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* @param int $tagId |
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* @return bool |
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* @throws \Exception |
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*/ |
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private function postHasTag(int $postId, int $tagId): bool |
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{ |
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$sql = "SELECT * FROM $this->tagAssoTbl WHERE post_idposts = :postId AND tag_idtags = :tagId"; |
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$this->query($sql); |
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$this->bind(':postId', $postId); |
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$this->bind(':tagId', $tagId); |
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$this->execute(); |
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return $this->stmt->rowCount() > 0; |
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} |
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/** |
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* @param string $tagName the tag to search for |
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* @return int |
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* @throws \Exception |
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*/ |
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private function getTagId(string $tagName): int |
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{ |
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$sql = "SELECT idtags FROM $this->tagTbl WHERE tag_name = :tagName"; |
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$this->query($sql); |
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$this->bind(':tagName', $tagName); |
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$this->execute(); |
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//if no rows, return zero |
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if (!$this->stmt->rowCount() > 0) { |
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return 0; |
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} |
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return $this->stmt->fetchColumn(); |
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} |
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/** |
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* Create a new tag and return it's ID |
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* @param string $tag tag to insert |
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* @return int the inserted tag ID |
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* @throws \Exception |
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*/ |
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private function createNewTag(string $tag): int |
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{ |
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$sql = "INSERT INTO $this->tagTbl (tag_name) VALUES (:tag)"; |
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$this->query($sql); |
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$this->bind(":tag", $tag); |
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$this->execute(); |
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return (int)$this->dbh->lastInsertId(); |
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} |
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/** |
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* @return array the list of all the tags |
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* @throws \ReflectionException |
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*/ |
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public function getTags(): array |
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{ |
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return $this->getResultSet('tags'); |
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} |
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/** |
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* Add a tag to the post |
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* @param int $postId the post id |
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* @param int $tagId the tag id |
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* @throws \Exception |
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*/ |
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public function addTagToPost(int $postId, int $tagId) |
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{ |
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//if the post already has the tag, do nothing |
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if ($this->postHasTag($postId, $tagId)) { |
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return; |
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} |
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$sql = "INSERT INTO $this->tagAssoTbl (post_idposts, tag_idtags) VALUES (:postId, :tagId)"; |
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$this->query($sql); |
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$this->bind(':postId', $postId); |
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$this->bind(':tagId', $tagId); |
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$this->execute(); |
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} |
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/** |
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* Add a new tag to a post |
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* @param int $postId |
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* @param string $tag |
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* @throws \Exception |
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*/ |
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public function addNewTagToPost(int $postId, string $tag) |
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{ |
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//check if tag doesn't already exist |
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$tagId = $this->getTagId($tag); |
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if ($tagId === 0) { |
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$tagId = $this->createNewTag($tag); |
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} |
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$this->addTagToPost($postId, $tagId); |
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} |
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/** |
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* removes a tag from the post |
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* @param int $postId the post id |
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* @param int $tagId the tag id |
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* @throws \Exception |
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*/ |
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public function removeTagFromPost(int $postId, int $tagId) |
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{ |
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//if the tag isn't present, do nothing |
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if (!$this->postHasTag($postId, $tagId)) { |
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return; |
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} |
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$sql = "DELETE FROM $this->tagAssoTbl WHERE post_idposts = :postId AND tag_idtags = :tagId"; |
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$this->query($sql); |
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$this->bind(':postId', $postId); |
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$this->bind(':tagId', $tagId); |
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$this->execute(); |
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} |
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/** |
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* get all tags associated to a post |
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* @param int $postId the post ID |
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* @return array the associated tags |
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* @throws \Exception |
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*/ |
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public function getTagsOnPost(int $postId) |
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{ |
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$sql = "SELECT tag_name, idtags FROM $this->tagTbl |
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INNER JOIN $this->tagAssoTbl ON $this->tagTbl.idtags = $this->tagAssoTbl.tag_idtags |
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WHERE post_idposts = :postId |
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"; |
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$this->query($sql); |
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$this->bind(":postId", $postId); |
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$this->execute(); |
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return $this->fetchAll(); |
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} |
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/** |
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* Remove all tags from a post |
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* @param int $postId the post ID |
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* @throws \Exception |
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*/ |
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public function removeTagsOnPost(int $postId) |
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{ |
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$sql = " |
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DELETE FROM $this->tagAssoTbl |
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WHERE post_idposts = :postId |
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;"; |
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$this->query($sql); |
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$this->bind(":postId", $postId); |
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$this->execute(); |
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} |
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public function getTagDetails(int $tagId) |
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{ |
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return $this->getRowById($tagId); |
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} |
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} |
Starbugstone /
blogoc
