SVG handler

git-svn-id: file:///home/shish/svn/shimmie2/trunk@658 7f39781d-f577-437e-ae19-be835c7a54ca

contrib/handle_svg/main.php

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+<?php
+/**
+ * Name: SVG File Handler
+ * Author: Shish <webmaster@shishnet.org>
+ * Description: Handle SVG files
+ */
+
+class SVGFileHandler extends Extension {
+	var $theme;
+
+	public function receive_event($event) {
+		if(is_null($this->theme)) $this->theme = get_theme_object("handle_svg", "SVGFileHandlerTheme");
+
+		if(is_a($event, 'DataUploadEvent') && $event->type == "svg" && $this->check_contents($event->tmpname)) {
+			$hash = $event->hash;
+			$ha = substr($hash, 0, 2);
+			if(!copy($event->tmpname, "images/$ha/$hash")) {
+				$event->veto("SVG Handler failed to move file from uploads to archive");
+				return;
+			}
+			send_event(new ThumbnailGenerationEvent($event->hash, $event->type));
+			$image = $this->create_image_from_data("images/$ha/$hash", $event->metadata);
+			if(is_null($image)) {
+				$event->veto("SVG Handler failed to create image object from data");
+				return;
+			}
+			send_event(new ImageAdditionEvent($event->user, $image));
+		}
+
+		if(is_a($event, 'ThumbnailGenerationEvent') && $event->type == "svg") {
+			$hash = $event->hash;
+			$ha = substr($hash, 0, 2);
+			// FIXME: scale image, as not all boards use 192x192
+			copy("ext/handle_svg/thumb.jpg", "thumbs/$ha/$hash");
+		}
+
+		if(is_a($event, 'DisplayingImageEvent') && $event->image->ext == "svg") {
+			$this->theme->display_image($event->page, $event->image);
+		}
+		
+		if(is_a($event, 'PageRequestEvent') && ($event->page_name == "get_svg")) {
+			global $database;
+			$id = int_escape($event->get_arg(0));
+			$image = $database->get_image($id);
+			$hash = $image->hash;
+			$ha = substr($hash, 0, 2);
+			
+			$event->page->set_type("image/svg+xml");
+			$event->page->set_mode("data");
+			$event->page->set_data(file_get_contents("images/$ha/$hash"));
+		}
+	}
+
+	private function create_image_from_data($filename, $metadata) {
+		global $config;
+
+		$image = new Image();
+
+		// FIXME: ugh, xml parsing :|
+		$image->width = 0;
+		$image->height = 0;
+		
+		$image->filesize  = $metadata['size'];
+		$image->hash      = $metadata['hash'];
+		$image->filename  = $metadata['filename'];
+		$image->ext       = $metadata['extension'];
+		$image->tag_array = tag_explode($metadata['tags']);
+		$image->source    = $metadata['source'];
+
+		return $image;
+	}
+
+	private function check_contents($file) {
+		// FIXME: magic header?
+		return (file_exists($file));
+	}
+}
+add_event_listener(new SVGFileHandler());
+?>

contrib/handle_svg/theme.php

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+<?php
+
+class SVGFileHandlerTheme extends Themelet {
+	public function display_image($page, $image) {
+		$link = make_link("get_svg/{$image->id}/{$image->id}.svg");
+		// FIXME: object and embed have "height" and "width"
+		$html = "
+			<object data='$link' type='image/svg+xml' width='300' height='300' />
+			    <embed src='$link' type='image/svg+xml' width='300' height='300' />
+			</object>
+		";
+		$page->add_block(new Block("Image", $html, "main", 0));
+	}
+}
+?>