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Module / POC - Like system for ProcessWire Pages - ProcessWire
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| <?php namespace ProcessWire; | |
| $likesmod = $modules->get('LikeSystem'); | |
| // render a 'like' button | |
| $content = $likesmod->render(); | |
| // total like of the page | |
| $content .= "Number of likes for this page: " . $likesmod->getTotal($page->id); | |
| // most liked page | |
| $limit = 1 | |
| $mostliked = $likesmod->getMostLikedPage($limit); | |
| $content .= "<br>Most liked page: " . $pages->get($mostliked[0]['pageId'])->title . "(" . $mostliked[0]['pageId'] . ") " . " (N likes: ". $mostliked[0]['likesCount'] . ")"; |
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| <?php namespace ProcessWire; | |
| class LikeSystem extends WireData implements Module { | |
| const minVersion = '3.0.0'; | |
| protected $tableName = 'likes_system'; | |
| public static function getModuleInfo() | |
| { | |
| return [ | |
| 'title' => 'LikeSystem', | |
| 'version' => "0.0.1", | |
| 'summary' => 'Like System for ProcessWire.', | |
| 'author' => 'flydev', | |
| 'href' => 'https://processwire.com', | |
| 'singular' => false, | |
| 'autoload' => false, | |
| 'icon' => 'thumbs-up', | |
| 'requires' => [ | |
| 'ProcessWire>=3.0.0' | |
| ] | |
| ]; | |
| } | |
| protected function createTable() { | |
| $sql = "CREATE TABLE IF NOT EXISTS " . $this->tableName . " ( " . | |
| "id int unsigned NOT NULL AUTO_INCREMENT, " . | |
| "userId int unsigned NOT NULL, " . | |
| "pageId int unsigned NOT NULL, " . | |
| "likes boolean NOT NULL," . | |
| "ts timestamp NULL DEFAULT CURRENT_TIMESTAMP, " . | |
| "PRIMARY KEY (id) " . | |
| ")"; | |
| $this->database->exec($sql); | |
| $sql = "CREATE UNIQUE INDEX userId_pageId ON " . $this->tableName . " ('userId', 'pageId');"; | |
| $this->database->exec($sql); | |
| } | |
| public function ___install() { | |
| if (version_compare($this->config->version, self::minVersion, '<')) | |
| throw new WireException("This module requires ProcessWire " . self::minVersion . " or newer."); | |
| $this->createTable(); | |
| } | |
| public function ___uninstall() { | |
| $sql = "DROP TABLE IF EXISTS " . $this->tableName; | |
| $this->database->exec($sql); | |
| } | |
| public function init() { | |
| // check if the button 'like' as been clicked | |
| if(wire('input')->post->likethispage) { | |
| $status = (wire('input')->post->likethispage === 'like') ? 1 : 0; | |
| $this->likePage($status); | |
| } | |
| } | |
| // Like or unlike a page | |
| protected function likePage($status) { | |
| $userId = wire('user')->id; | |
| $sql = "INSERT INTO " . $this->tableName . "(userId, pageId, likes) VALUES ('".$userId."', '".wire('page')->id. "', '" . $status . "') | |
| ON DUPLICATE KEY UPDATE | |
| likes = $status, | |
| ts = CURRENT_TIMESTAMP;"; | |
| $this->database->exec($sql); | |
| } | |
| // get the total of like of $pageId or current page | |
| public function getTotal($pageId = '') { | |
| $pageId = empty($pageId) ? wire('page')->id : $pageId; | |
| $sql = "SELECT pageId FROM " . $this->tableName . " WHERE pageId = '" . $pageId . "' and likes = '1';"; | |
| $res = $this->database->query($sql); | |
| $row = $res->fetchAll(); | |
| return count($row); | |
| } | |
| // get the most liked page, if $limit is defined, it return the N most liked page | |
| public function getMostLikedPage($limit = 5) { | |
| $sql = "SELECT pageId, count(pageId) as likesCount FROM " . $this->tableName . | |
| " WHERE likes='1' GROUP BY pageId ORDER BY likesCount DESC LIMIT $limit;"; | |
| $res = $this->database->query($sql); | |
| $row = $res->fetchAll(); | |
| return $row; | |
| } | |
| public function render() { | |
| $modules = wire('modules'); | |
| $sql = "SELECT pageId, likes FROM " . $this->tableName . " WHERE pageId = '" . wire('page')->id . "' and userId = '". wire('user')->id ."';"; | |
| $res = $this->database->query($sql); | |
| $row = $res->fetch(); | |
| $label = 'like'; | |
| if(count($row)) { | |
| if($row['likes'] == 1) $label = 'unlike'; | |
| } | |
| $form = $modules->get("InputfieldForm"); | |
| $form->action = './'; | |
| $form->method = 'post'; | |
| $form->attr('id+name', 'likeSystemForm'); | |
| $field = $modules->get("InputfieldSubmit"); | |
| $field->value = $label; | |
| $field->icon = "thumbs-up"; | |
| $field->attr('id+name', 'likethispage'); | |
| $form->append($field); | |
| return $form->render(); | |
| } | |
| } |
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