store enabled exts in a config file, rather than moving directories around

ext/random_image/main.php

@@ -0,0 +1,72 @@
+<?php
+/*
+ * Name: Random Image
+ * Author: Shish <webmaster@shishnet.org>
+ * Link: http://code.shishnet.org/shimmie2/
+ * License: GPLv2
+ * Description: Do things with a random image
+ * Documentation:
+ *  <b>Viewing a random image</b>
+ *  <br>Visit <code>/random_image/view</code>
+ *  <p><b>Downloading a random image</b>
+ *  <br>Link to <code>/random_image/download</code>. This will give
+ *  the raw data for an image (no HTML). This is useful so that you
+ *  can set your desktop wallpaper to be the download URL, refreshed
+ *  every couple of hours.
+ *  <p><b>Getting a random image from a subset</b>
+ *  <br>Adding a slash and some search terms will get a random image
+ *  from those results. This can be useful if you want a specific size
+ *  of random image, or from a category. You could link to
+ *  <code>/random_image/download/size=1024x768+cute</code>
+ */
+
+class RandomImage extends Extension {
+	public function onPageRequest(PageRequestEvent $event) {
+		global $config, $database, $page, $user;
+		if($event->page_matches("random_image")) {
+			$action = '';
+			if($event->count_args() == 1) {
+				$action = $event->get_arg(0);
+				$search_terms = array();
+			}
+			else if($event->count_args() == 2) {
+				$action = $event->get_arg(0);
+				$search_terms = explode(' ', $event->get_arg(1));
+			}
+			else {
+				# FIXME: throw exception
+			}
+			$image = Image::by_random($search_terms);
+
+			if($action === "download") {
+				if(!is_null($image)) {
+					$page->set_mode("data");
+					$page->set_type("image/jpeg");
+					$page->set_data(file_get_contents($image->get_image_filename()));
+				}
+			}
+			if($action === "view") {
+				if(!is_null($image)) {
+					send_event(new DisplayingImageEvent($image, $page));
+				}
+			}
+		}
+	}
+
+	public function onSetupBuilding(SetupBuildingEvent $event) {
+		$sb = new SetupBlock("Random Image");
+		$sb->add_bool_option("show_random_block", "Show Random Block: ");
+		$event->panel->add_block($sb);
+	}
+
+	public function onPostListBuilding(PostListBuildingEvent $event) {
+		global $config, $page;
+		if($config->get_bool("show_random_block")) {
+			$image = Image::by_random($event->search_terms);
+			if(!is_null($image)) {
+				$this->theme->display_random($page, $image);
+			}
+		}
+	}
+}
+?>