initial import of favorites extension
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Shish
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163
contrib/favorites/main.php
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163
contrib/favorites/main.php
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<?php
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/**
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* Name: Favorites
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* Author: Daniel Marschall <info@daniel-marschall.de>
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* License: GPLv2
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* Description: Allow users to favorite images
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*/
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class FavoriteSetEvent extends Event {
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var $image_id, $user, $do_set;
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public function FavoriteSetEvent($image_id, $user, $do_set) {
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$this->image_id = $image_id;
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$this->user = $user;
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$this->do_set = $do_set;
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}
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}
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class Favorites extends Extension {
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var $theme;
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public function receive_event($event) {
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if(is_null($this->theme)) $this->theme = get_theme_object("favorites", "FavoritesTheme");
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if(is_a($event, 'InitExtEvent')) {
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global $config;
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if($config->get_int("ext_favorites_version", 0) < 1) {
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$this->install();
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}
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}
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if(is_a($event, 'DisplayingImageEvent')) {
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global $user;
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if(!$user->is_anonymous()) {
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$user_id = $user->id;
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$image_id = $event->image->id;
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global $database;
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$is_favorited = false;
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$sqlresult = $database->execute("SELECT COUNT(*) AS ct FROM user_favorites WHERE user_id = ? AND image_id = ?", array($user_id, $image_id));
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if(!$sqlresult->EOF)
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{
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$is_favorited = $sqlresult->fields['ct'] > 0;
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}
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$html = $this->theme->get_voter_html($event->image, $is_favorited);
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} else {
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$html = $this->theme->show_anonymous_html($event->image);
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}
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$event->page->add_block(new Block("Favorites", $html, "left", 20));
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$html = $this->theme->show_favorite_marks($this->list_persons_who_have_favorited($event->image));
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$event->page->add_block(new Block("Favorited by", $html, "left", 25));
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}
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if(is_a($event, 'PageRequestEvent') && ($event->page_name == "change_favorite")) {
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if(!$event->user->is_anonymous()) {
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$image_id = int_escape($_POST['image_id']);
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if (($_POST['favorite_action'] == "set") || ($_POST['favorite_action'] == "unset")) {
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send_event(new FavoriteSetEvent($image_id, $event->user, ($_POST['favorite_action'] == "set")));
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}
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$event->page->set_mode("redirect");
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$event->page->set_redirect(make_link("post/view/$image_id"));
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}
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}
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if(is_a($event, 'ImageInfoSetEvent')) {
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global $user;
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if (($_POST['favorite_action'] == "set") || ($_POST['favorite_action'] == "unset")) {
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send_event(new FavoriteSetEvent($event->image_id, $user, ($_POST['favorite_action'] == "set")));
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}
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}
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if(is_a($event, 'FavoriteSetEvent')) {
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$this->add_vote($event->image_id, $event->user->id, $event->do_set);
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}
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if(is_a($event, 'ImageDeletionEvent')) {
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global $database;
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$database->execute("DELETE FROM user_favorites WHERE image_id=?", array($event->image->id));
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}
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if(is_a($event, 'ParseLinkTemplateEvent')) {
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$event->replace('$favorites', $event->image->favorites);
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}
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if(is_a($event, 'SearchTermParseEvent')) {
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$matches = array();
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if(preg_match("/favorites(<|>|<=|>=|=)(\d+)/", $event->term, $matches)) {
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$cmp = $matches[1];
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$favorites = $matches[2];
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$event->set_querylet(new Querylet("favorites $cmp $favorites"));
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}
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else if(preg_match("/favorited_by=(.*)/i", $event->term, $matches)) {
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global $database;
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$user = $database->get_user_by_name($matches[1]);
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if(!is_null($user)) {
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$user_id = $user->id;
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}
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else {
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$user_id = -1;
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}
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$event->set_querylet(new Querylet("images.id IN (SELECT image_id FROM user_favorites WHERE user_id = $user_id)"));
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}
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else if(preg_match("/favorited_by_userno=([0-9]+)/i", $event->term, $matches)) {
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$user_id = int_escape($matches[1]);
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$event->set_querylet(new Querylet("images.id IN (SELECT image_id FROM user_favorites WHERE user_id = $user_id)"));
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}
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}
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}
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private function install() {
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global $database;
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global $config;
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if($config->get_int("ext_favorites_version") < 1) {
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$database->Execute("ALTER TABLE images ADD COLUMN favorites INTEGER NOT NULL DEFAULT 0");
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$database->Execute("CREATE INDEX images__favorites ON images(favorites)");
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$database->Execute("
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CREATE TABLE user_favorites (
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image_id INTEGER NOT NULL,
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user_id INTEGER NOT NULL,
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created_at DATETIME NOT NULL,,
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UNIQUE(image_id, user_id),
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INDEX(image_id)
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)
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");
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$config->set_int("ext_favorites_version", 1);
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}
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}
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private function add_vote($image_id, $user_id, $do_set) {
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global $database;
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if ($do_set) {
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$database->Execute(
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"INSERT INTO user_favorites(image_id, user_id, created_at) VALUES(?, ?, NOW())",
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array($image_id, $user_id));
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} else {
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$database->Execute(
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"DELETE FROM user_favorites WHERE image_id = ? AND user_id = ?",
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array($image_id, $user_id));
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}
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$database->Execute(
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"UPDATE images SET favorites=(SELECT COUNT(*) FROM user_favorites WHERE image_id=?) WHERE id=?",
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array($image_id, $image_id));
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}
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private function list_persons_who_have_favorited($image) {
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global $database;
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$result = $database->execute(
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"SELECT name FROM users WHERE id IN (SELECT user_id FROM user_favorites WHERE image_id = ?) ORDER BY name",
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array($image->id));
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return $result->GetArray();
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}
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}
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add_event_listener(new Favorites());
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?>
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71
contrib/favorites/theme.php
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71
contrib/favorites/theme.php
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<?php
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class FavoritesTheme extends Themelet {
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public function get_voter_html($image, $is_favorited) {
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$i_image_id = int_escape($image->id);
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$i_favorites = int_escape($image->favorites);
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global $user;
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$username = $user->name;
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$html = "
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Favorites: $i_favorites
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<br>
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<br>";
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if (!$is_favorited)
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{
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$html .= "<p><form action='".make_link("change_favorite")."' method='POST'>
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<input type='hidden' name='image_id' value='$i_image_id'>
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<input type='hidden' name='favorite_action' value='set'>
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<input type='submit' value='Favorite'>
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</form></p>";
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}
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else
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{
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$html .= "<p><form action='".make_link("change_favorite")."' method='POST'>
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<input type='hidden' name='image_id' value='$i_image_id'>
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<input type='hidden' name='favorite_action' value='unset'>
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<input type='submit' value='Un-Favorite'>
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</form></p>";
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}
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$pos = strpos($username, ' ');
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if ($pos === false) {
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$html .= "<br><a href='".make_link("post/list/favorited_by=$username/1")."'>Show my favorites</a><br><br>";
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} else {
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$userid = $user->id;
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$html .= "<br><a href='".make_link("post/list/favorited_by_userno=$userid/1")."'>Show my favorites</a><br><br>";
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}
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return $html;
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}
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public function show_anonymous_html($image) {
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$i_image_id = int_escape($image->id);
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$i_favorites = int_escape($image->favorites);
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$html = "
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Favorites: $i_favorites
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<br><br>";
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return $html;
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}
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public function show_favorite_marks($username_array) {
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$html = '';
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foreach ($username_array as $row) {
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$username = $row['name'];
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$html .= "<a href='".make_link("user/$username")."'>$username</a><br>";
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}
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if ($html == '') {
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$html = 'Not favorited yet';
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}
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return $html;
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}
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}
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?>
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