149 lines
4.1 KiB
PHP
149 lines
4.1 KiB
PHP
<?php
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/*
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* Name: Image Hash Ban
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* Author: ATravelingGeek <atg@atravelinggeek.com>
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* Link: http://atravelinggeek.com/
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* License: GPLv2
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* Description: Ban images based on their hash
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* Based on the ResolutionLimit and IPban extensions by Shish
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* Version 0.1, October 21, 2007
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*/
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// RemoveImageHashBanEvent {{{
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class RemoveImageHashBanEvent extends Event {
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var $hash;
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public function RemoveImageHashBanEvent($hash) {
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$this->hash = $hash;
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}
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}
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// }}}
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// AddImageHashBanEvent {{{
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class AddImageHashBanEvent extends Event {
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var $hash;
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var $reason;
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public function AddImageHashBanEvent($hash, $reason) {
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$this->hash = $hash;
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$this->reason = $reason;
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}
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}
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// }}}
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class ImageBan implements Extension {
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var $theme;
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public function receive_event(Event $event) {
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global $config, $database, $page, $user;
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if(is_null($this->theme)) $this->theme = get_theme_object($this);
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if($event instanceof InitExtEvent) {
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if($config->get_int("ext_imageban_version") < 1) {
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$this->install();
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}
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}
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if($event instanceof DataUploadEvent) {
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$row = $database->db->GetRow("SELECT * FROM image_bans WHERE hash = ?", $event->hash);
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if($row) {
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log_info("image_hash_ban", "Blocked image ({$event->hash})");
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throw new UploadException("Image ".html_escape($row["hash"])." has been banned, reason: ".format_text($row["reason"]));
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}
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}
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if(($event instanceof PageRequestEvent) && $event->page_matches("image_hash_ban")) {
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if($user->is_admin()) {
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if($event->get_arg(0) == "add") {
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if(isset($_POST['hash']) && isset($_POST['reason'])) {
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send_event(new AddImageHashBanEvent($_POST['hash'], $_POST['reason']));
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$page->set_mode("redirect");
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$page->set_redirect(make_link("image_hash_ban/list/1"));
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}
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if(isset($_POST['image_id'])) {
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$image = Image::by_id(int_escape($_POST['image_id']));
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if($image) {
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send_event(new ImageDeletionEvent($image));
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$page->set_mode("redirect");
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$page->set_redirect(make_link("post/list"));
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}
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}
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}
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else if($event->get_arg(0) == "remove") {
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if(isset($_POST['hash'])) {
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send_event(new RemoveImageHashBanEvent($_POST['hash']));
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$page->set_mode("redirect");
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$page->set_redirect(make_link("image_hash_ban/list/1"));
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}
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}
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else if($event->get_arg(0) == "list") {
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$page_num = 0;
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if($event->count_args() == 2) {
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$page_num = int_escape($event->get_arg(1));
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}
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$this->theme->display_Image_hash_Bans($page, $page_num, $this->get_image_hash_bans($page_num));
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}
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}
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}
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if($event instanceof UserBlockBuildingEvent) {
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if($user->is_admin()) {
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$event->add_link("Image Bans", make_link("image_hash_ban/list/1"));
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}
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}
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if($event instanceof AddImageHashBanEvent) {
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$this->add_image_hash_ban($event->hash, $event->reason);
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}
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if($event instanceof RemoveImageHashBanEvent) {
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$this->remove_image_hash_ban($event->hash);
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}
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if($event instanceof ImageAdminBlockBuildingEvent) {
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if($user->is_admin()) {
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$event->add_part($this->theme->get_buttons_html($event->image));
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}
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}
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}
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protected function install() {
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global $database;
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global $config;
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$database->create_table("image_bans", "
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id SCORE_AIPK,
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hash CHAR(32) NOT NULL,
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date DATETIME DEFAULT SCORE_NOW,
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reason TEXT NOT NULL
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");
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$config->set_int("ext_imageban_version", 1);
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}
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// DB funness
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public function get_image_hash_bans($page, $size=1000) {
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// FIXME: many
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$size_i = int_escape($size);
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$offset_i = int_escape($page-1)*$size_i;
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global $database;
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$bans = $database->get_all("SELECT * FROM image_bans ORDER BY id DESC LIMIT $size_i OFFSET $offset_i");
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if($bans) {return $bans;}
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else {return array();}
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}
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public function add_image_hash_ban($hash, $reason) {
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global $database;
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$database->Execute(
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"INSERT INTO image_bans (hash, reason, date) VALUES (?, ?, now())",
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array($hash, $reason));
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}
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public function remove_image_hash_ban($hash) {
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global $database;
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$database->Execute("DELETE FROM image_bans WHERE hash = ?", array($hash));
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}
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}
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add_event_listener(new ImageBan(), 30); // in before resolution limit plugin
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?>
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