120 lines
3.5 KiB
PHP
120 lines
3.5 KiB
PHP
<?php
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/**
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* Name: Image Scores (Numeric)
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* Author: Shish <webmaster@shishnet.org>
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* License: GPLv2
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* Description: Allow users to score images
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*/
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class NumericScoreSetEvent extends Event {
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var $image_id, $user, $score;
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public function NumericScoreSetEvent($image_id, $user, $score) {
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$this->image_id = $image_id;
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$this->user = $user;
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$this->score = $score;
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}
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}
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class NumericScore implements Extension {
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var $theme;
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public function receive_event(Event $event) {
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if(is_null($this->theme)) $this->theme = get_theme_object($this);
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if($event instanceof InitExtEvent) {
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global $config;
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if($config->get_int("ext_numeric_score_version", 0) < 1) {
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$this->install();
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}
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}
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if($event instanceof DisplayingImageEvent) {
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global $user;
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if(!$user->is_anonymous()) {
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$html = $this->theme->get_voter_html($event->image);
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$event->page->add_block(new Block("Image Score", $html, "left", 20));
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}
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}
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if(($event instanceof PageRequestEvent) && $event->page_matches("numeric_score_vote")) {
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if(!$event->user->is_anonymous()) {
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$image_id = int_escape($_POST['image_id']);
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$char = $_POST['vote'];
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$score = 0;
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if($char == "up") $score = 1;
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else if($char == "down") $score = -1;
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if($score != 0) send_event(new NumericScoreSetEvent($image_id, $event->user, $score));
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$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($event instanceof ImageInfoSetEvent) {
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global $user;
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$char = $_POST['numeric_score'];
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$score = 0;
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if($char == "u") $score = 1;
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else if($char == "d") $score = -1;
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if($score != 0) send_event(new NumericScoreSetEvent($event->image_id, $user, $score));
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}
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if($event instanceof NumericScoreSetEvent) {
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$this->add_vote($event->image_id, $event->user->id, $event->score);
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}
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if($event instanceof ImageDeletionEvent) {
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global $database;
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$database->execute("DELETE FROM numeric_score_votes WHERE image_id=?", array($event->image->id));
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}
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if($event instanceof ParseLinkTemplateEvent) {
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$event->replace('$score', $event->image->numeric_score);
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}
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if($event instanceof SearchTermParseEvent) {
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$matches = array();
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if(preg_match("/score(<|<=|=|>=|>)(\d+)/", $event->term, $matches)) {
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$cmp = $matches[1];
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$score = $matches[2];
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$event->set_querylet(new Querylet("numeric_score $cmp $score"));
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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_numeric_score_version") < 1) {
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$database->Execute("ALTER TABLE images ADD COLUMN numeric_score INTEGER NOT NULL DEFAULT 0");
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$database->Execute("CREATE INDEX images__numeric_score ON images(numeric_score)");
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$database->Execute("
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CREATE TABLE numeric_score_votes (
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image_id INTEGER NOT NULL,
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user_id INTEGER NOT NULL,
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score INTEGER NOT NULL,
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UNIQUE(image_id, user_id),
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INDEX(image_id)
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)
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");
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$config->set_int("ext_numeric_score_version", 1);
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}
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}
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private function add_vote($image_id, $user_id, $score) {
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global $database;
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$database->Execute(
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"DELETE FROM numeric_score_votes WHERE image_id=? AND user_id=?",
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array($image_id, $user_id));
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$database->Execute(
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"INSERT INTO numeric_score_votes(image_id, user_id, score) VALUES(?, ?, ?)",
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array($image_id, $user_id, $score));
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$database->Execute(
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"UPDATE images SET numeric_score=(SELECT SUM(score) FROM numeric_score_votes WHERE image_id=?) WHERE id=?",
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array($image_id, $image_id));
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}
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}
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add_event_listener(new NumericScore());
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?>
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