249 lines
6.5 KiB
PHP
249 lines
6.5 KiB
PHP
<?php
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/*
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* ImageAdditionEvent:
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* $user -- the user adding the image
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* $image -- the image being added
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*
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* An image is being added to the database
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*/
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class ImageAdditionEvent extends Event {
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var $user, $image;
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public function ImageAdditionEvent($user, $image) {
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$this->image = $image;
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$this->user = $user;
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}
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}
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/*
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* ImageDeletionEvent:
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* $image -- the image being deleted
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*
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* An image is being deleted. Used by things like tags
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* and comments handlers to clean out related rows in
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* their tables
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*/
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class ImageDeletionEvent extends Event {
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var $image;
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public function ImageDeletionEvent($image) {
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$this->image = $image;
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}
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}
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/*
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* ThumbnailGenerationEvent:
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* Request a thumb be made for an image
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*/
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class ThumbnailGenerationEvent extends Event {
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var $hash;
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var $type;
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public function ThumbnailGenerationEvent($hash, $type) {
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$this->hash = $hash;
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$this->type = $type;
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}
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}
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/*
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* ParseLinkTemplateEvent:
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* $link -- the formatted link
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* $original -- the formatting string, for reference
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* $image -- the image who's link is being parsed
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*/
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class ParseLinkTemplateEvent extends Event {
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var $link, $original;
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var $image;
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public function ParseLinkTemplateEvent($link, $image) {
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$this->link = $link;
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$this->original = $link;
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$this->image = $image;
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}
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public function replace($needle, $replace) {
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$this->link = str_replace($needle, $replace, $this->link);
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}
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}
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/*
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* A class to handle adding / getting / removing image
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* files from the disk
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*/
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class ImageIO implements Extension {
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// event handling {{{
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public function receive_event(Event $event) {
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if($event instanceof InitExtEvent) {
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global $config;
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$config->set_default_int('thumb_width', 192);
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$config->set_default_int('thumb_height', 192);
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$config->set_default_int('thumb_quality', 75);
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$config->set_default_int('thumb_mem_limit', parse_shorthand_int('8MB'));
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$config->set_default_string('image_ilink', '');
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$config->set_default_string('image_tlink', '');
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$config->set_default_string('image_tip', '$tags // $size // $filesize');
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$config->set_default_string('upload_collision_handler', 'error');
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}
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if($event instanceof PageRequestEvent) {
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$num = $event->get_arg(0);
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$matches = array();
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if(!is_null($num) && preg_match("/(\d+)/", $num, $matches)) {
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$num = $matches[1];
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if($event->page_matches("image")) {
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$this->send_file($num, "image");
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}
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else if($event->page_matches("thumb")) {
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$this->send_file($num, "thumb");
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}
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}
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}
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if($event instanceof ImageAdditionEvent) {
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$error = $this->add_image($event->image);
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if(!empty($error)) throw new UploadException($error);
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}
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if($event instanceof ImageDeletionEvent) {
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$event->image->delete();
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}
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if($event instanceof SetupBuildingEvent) {
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$sb = new SetupBlock("Image Options");
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$sb->position = 30;
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// advanced only
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//$sb->add_text_option("image_ilink", "Image link: ");
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//$sb->add_text_option("image_tlink", "<br>Thumbnail link: ");
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$sb->add_text_option("image_tip", "Image tooltip: ");
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$sb->add_choice_option("upload_collision_handler", array('Error'=>'error', 'Merge'=>'merge'), "<br>Upload collision handler: ");
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$event->panel->add_block($sb);
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$thumbers = array();
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$thumbers['Built-in GD'] = "gd";
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$thumbers['ImageMagick'] = "convert";
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$sb = new SetupBlock("Thumbnailing");
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$sb->add_choice_option("thumb_engine", $thumbers, "Engine: ");
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$sb->add_label("<br>Size ");
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$sb->add_int_option("thumb_width");
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$sb->add_label(" x ");
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$sb->add_int_option("thumb_height");
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$sb->add_label(" px at ");
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$sb->add_int_option("thumb_quality");
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$sb->add_label(" % quality ");
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$sb->add_shorthand_int_option("thumb_mem_limit", "<br>Max memory use: ");
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$event->panel->add_block($sb);
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}
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}
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// }}}
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// add image {{{
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private function add_image($image) {
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global $page;
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global $user;
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global $database;
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global $config;
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/*
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* Validate things
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*/
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if(strlen(trim($image->source)) == 0) {
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$image->source = null;
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}
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if(!empty($image->source)) {
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if(!preg_match("#^(https?|ftp)://#", $image->source)) {
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$error = "Image's source isn't a valid URL";
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return $error;
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}
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}
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/*
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* Check for an existing image
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*/
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$existing = Image::by_hash($config, $database, $image->hash);
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if(!is_null($existing)) {
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$handler = $config->get_string("upload_collision_handler");
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if($handler == "merge") {
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$merged = array_merge($image->get_tag_array(), $existing->get_tag_array());
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send_event(new TagSetEvent($existing->id, $merged));
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return null;
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}
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else {
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$error = "Image <a href='".make_link("post/view/{$existing->id}")."'>{$existing->id}</a> ".
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"already has hash {$image->hash}:<p>".Themelet::build_thumb_html($existing);
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return $error;
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}
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}
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// actually insert the info
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$database->Execute(
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"INSERT INTO images(
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owner_id, owner_ip, filename, filesize,
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hash, ext, width, height, posted, source)
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VALUES (?, ?, ?, ?, ?, ?, ?, ?, now(), ?)",
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array($user->id, $_SERVER['REMOTE_ADDR'], $image->filename, $image->filesize,
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$image->hash, $image->ext, $image->width, $image->height, $image->source));
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$image->id = $database->db->Insert_ID();
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send_event(new TagSetEvent($image->id, $image->get_tag_array()));
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return null;
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}
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// }}}
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// fetch image {{{
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private function send_file($image_id, $type) {
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global $config;
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global $database;
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$image = Image::by_id($config, $database, $image_id);
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global $page;
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if(!is_null($image)) {
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$page->set_mode("data");
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if($type == "thumb") {
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$page->set_type("image/jpeg");
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$file = $image->get_thumb_filename();
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}
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else {
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$page->set_type($image->get_mime_type());
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$file = $image->get_image_filename();
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}
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$page->set_data(file_get_contents($file));
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if(isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])) {
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$if_modified_since = preg_replace('/;.*$/', '', $_SERVER["HTTP_IF_MODIFIED_SINCE"]);
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}
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else {
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$if_modified_since = "";
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}
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$gmdate_mod = gmdate('D, d M Y H:i:s', filemtime($file)) . ' GMT';
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// FIXME: should be $page->blah
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if($if_modified_since == $gmdate_mod) {
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header("HTTP/1.0 304 Not Modified");
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}
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else {
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header("Last-Modified: $gmdate_mod");
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header("Expires: Fri, 2 Sep 2101 12:42:42 GMT"); // War was beginning
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}
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}
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else {
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$page->set_title("Not Found");
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$page->set_heading("Not Found");
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$page->add_block(new Block("Navigation", "<a href='".make_link()."'>Index</a>", "left", 0));
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$page->add_block(new Block("Image not in database",
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"The requested image was not found in the database"));
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}
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}
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// }}}
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}
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add_event_listener(new ImageIO());
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?>
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