Add a little script to generate the feed and the signature

Signed-off-by: Joas Schilling <coding@schilljs.com>

4 files changed, 110 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9f6f011
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+/nextcloud_announcements.key
+/feed.rss
+/feed.signature
+
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..1f65024
--- /dev/null
+++ b/README.md
@@ -0,0 +1,16 @@
+# Announcer
+
+This script generates the `feed.rss` and `feed.signature` which are published on https://pushfeed.nextcloud.com/.
+The feed is then pulled by the [nextcloud_announcements](https://github.com/nextcloud/nextcloud_announcements) app.
+
+## How To
+
+
+1. Ask @LukasReschke for the `nextcloud_announcements.key`, or generate a temporary one yourself.
+2. Add the new announcement to `feed.txt`
+
+  _Note: Lines starting with `#` are ignored_
+
+3. Run `php generate.php`
+4. Upload `feed.rss` and `feed.signature` to the server
+
diff --git a/feed.txt b/feed.txt
new file mode 100644
index 0000000..4b7280b
--- /dev/null
+++ b/feed.txt
@@ -0,0 +1,2 @@
+# 1 - 2016-11-15 - https://nextcloud.com/blog/nextcloud-sponsors-and-participates-in-open-2016/ - Nextcloud Sponsors and participates in OPEN! 2016
+
diff --git a/generate.php b/generate.php
new file mode 100644
index 0000000..63ecc60
--- /dev/null
+++ b/generate.php
@@ -0,0 +1,88 @@
+<?php
+/**
+ * @copyright Copyright (c) 2016 Joas Schilling <coding@schilljs.com>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+if (php_sapi_name() !== 'cli') {
+	echo 'Script can only run from command line' . "\n";
+	exit(1);
+}
+
+$content = file_get_contents(__DIR__ . '/feed.txt');
+$feeds = explode("\n", $content);
+$items = '';
+
+$maxDate = new \DateTime();
+$maxDate->setTimestamp(0);
+
+foreach ($feeds as $feed) {
+	$feed = trim($feed);
+	if ($feed === '' || $feed[0] === '#') {
+		continue;
+	}
+	list ($id, $date, $url, $title) = explode(' - ', $feed, 4);
+
+	$dateTime = new \DateTime();
+	call_user_func_array([$dateTime, 'setDate'], explode('-', $date));
+	$dateTime->setTime(0, 0, 0);
+
+	if ($dateTime->getTimestamp() > $maxDate->getTimestamp()) {
+		$maxDate = $dateTime;
+	}
+
+	$items .= '		<item>
+			<guid isPermaLink="false">' . $id . '</guid>
+			<title>' . $title . '</title>
+			<link>' . $url . '</link>
+			<pubDate>' . $dateTime->format('r') . '</pubDate>
+		</item>
+';
+}
+
+$beginning = '<?xml version="1.0" encoding="UTF-8"?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+	<channel>
+		<title>Nextcloud organisation</title>
+		<language>en</language>
+		<link>https://pushfeed.nextcloud.com/feed.rss</link>
+		<description>Feed for announcements from Nextcloud</description>
+		<pubDate>' . $maxDate->format('r') . '</pubDate>
+		<lastBuildDate>' . $maxDate->format('r') . '</lastBuildDate>
+		<atom:link href="https://pushfeed.nextcloud.com/feed.rss" rel="self" type="application/rss+xml" />
+';
+
+$content = $beginning . $items . '	</channel>
+</rss>
+';
+
+file_put_contents(__DIR__ . '/feed.rss', $content);
+echo 'Successfully generated feed.rss' . "\n";
+
+$key = file_get_contents(__DIR__ . '/nextcloud_announcements.key');
+$signature = '';
+if (!openssl_sign($content, $signature, $key, OPENSSL_ALGO_SHA512)) {
+	echo 'Error signing the feed' . "\n";
+	exit(1);
+}
+
+$signature = base64_encode($signature);
+$signature = implode("\n", str_split($signature, 64));
+
+file_put_contents(__DIR__ . '/feed.signature', $signature);
+echo 'Successfully generated feed.signature' . "\n";