143 lines
3.5 KiB
PHP
143 lines
3.5 KiB
PHP
<?php
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/*
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* Name: Image Viewer
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* Author: Shish
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* Description: Allows users to see uploaded images
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*/
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/*
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* DisplayingImageEvent:
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* $image -- the image being displayed
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* $page -- the page to display on
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*
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* Sent when an image is ready to display. Extensions who
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* wish to appear on the "view" page should listen for this,
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* which only appears when an image actually exists.
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*/
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class DisplayingImageEvent extends Event {
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var $image, $page, $context;
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public function __construct(Image $image) {
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$this->image = $image;
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}
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public function get_image() {
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return $this->image;
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}
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}
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class ImageInfoBoxBuildingEvent extends Event {
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var $parts = array();
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var $image;
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var $user;
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public function __construct(Image $image, User $user) {
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$this->image = $image;
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$this->user = $user;
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}
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public function add_part($html, $position=50) {
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while(isset($this->parts[$position])) $position++;
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$this->parts[$position] = $html;
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}
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}
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class ImageInfoSetEvent extends Event {
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var $image;
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public function __construct(Image $image) {
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$this->image = $image;
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}
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}
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class ImageAdminBlockBuildingEvent extends Event {
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var $parts = array();
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var $image = null;
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var $user = null;
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public function __construct(Image $image, User $user) {
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$this->image = $image;
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$this->user = $user;
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}
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public function add_part(/*string*/ $html, /*int*/ $position=50) {
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while(isset($this->parts[$position])) $position++;
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$this->parts[$position] = $html;
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}
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}
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class ViewImage extends Extension {
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public function onPageRequest(PageRequestEvent $event) {
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global $page, $user;
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if($event->page_matches("post/prev") || $event->page_matches("post/next")) {
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$image_id = int_escape($event->get_arg(0));
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if(isset($_GET['search'])) {
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$search_terms = explode(' ', $_GET['search']);
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$query = "#search=".url_escape($_GET['search']);
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}
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else {
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$search_terms = array();
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$query = null;
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}
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$image = Image::by_id($image_id);
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if(is_null($image)) {
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$this->theme->display_error(404, "Image not found", "Image $image_id could not be found");
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return;
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}
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if($event->page_matches("post/next")) {
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$image = $image->get_next($search_terms);
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}
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else {
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$image = $image->get_prev($search_terms);
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}
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if(is_null($image)) {
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$this->theme->display_error(404, "Image not found", "No more images");
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return;
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}
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$page->set_mode("redirect");
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$page->set_redirect(make_link("post/view/{$image->id}", $query));
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}
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else if($event->page_matches("post/view")) {
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$image_id = int_escape($event->get_arg(0));
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$image = Image::by_id($image_id);
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if(!is_null($image)) {
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send_event(new DisplayingImageEvent($image));
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$iabbe = new ImageAdminBlockBuildingEvent($image, $user);
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send_event($iabbe);
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ksort($iabbe->parts);
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$this->theme->display_admin_block($page, $iabbe->parts);
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}
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else {
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$this->theme->display_error(404, "Image not found", "No image in the database has the ID #$image_id");
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}
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}
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else if($event->page_matches("post/set")) {
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if(!isset($_POST['image_id'])) return;
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$image_id = int_escape($_POST['image_id']);
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send_event(new ImageInfoSetEvent(Image::by_id($image_id)));
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$page->set_mode("redirect");
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$page->set_redirect(make_link("post/view/$image_id", url_escape(@$_POST['query'])));
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}
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}
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public function onDisplayingImage(DisplayingImageEvent $event) {
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global $user;
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$iibbe = new ImageInfoBoxBuildingEvent($event->get_image(), $user);
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send_event($iibbe);
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ksort($iibbe->parts);
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$this->theme->display_page($event->get_image(), $iibbe->parts);
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}
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}
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