shimmie2/ext/view/main.php

166 lines
4.4 KiB
PHP

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