From cb1f0f7b093ff79e2df4cdd90c11902bc1a693f1 Mon Sep 17 00:00:00 2001
From: Christian Weiske <cweiske@cweiske.de>
Date: Wed, 25 Nov 2015 17:14:19 +0100
Subject: [PATCH] Add support for shell scripts and auto-executed scripts.

Now I'm finally able to control my house's heating system
from the kitchen radio.
---
 README.rst    | 62 ++++++++++++++++++++++++++++++++++++++++++++++-----
 www/index.php | 48 ++++++++++++++++++++++++++++++++++-----
 2 files changed, 98 insertions(+), 12 deletions(-)

diff --git a/README.rst b/README.rst
index c84f3e4..9d86b21 100644
--- a/README.rst
+++ b/README.rst
@@ -1,7 +1,8 @@
 ********************
 Noxon iRadio gateway
 ********************
-Push your own content onto Noxon iRadio devices.
+Push your own content onto Noxon iRadio devices:
+RSS feeds, text files and MediaTomb server structures.
 
 This tool makes it possible to push own data into the menu
 entries
@@ -11,11 +12,54 @@ entries
 - My Noxon
 
 
-================
-Adding a podcast
-================
-Create a file "Title.url" in ``var/podcasts/`` and write
-the URL of the podcast MP3 RSS feed into it.
+===================================
+Customizung the directory structure
+===================================
+The ``var/`` directory contains three directories you can fill with
+your own content.
+
+================ ==================
+Menu item        ``var/`` Directory
+================ ==================
+Internet Radio   ``internetradio``
+Podcasts         ``podcasts``
+My Noxon         ``mynoxon``
+================ ==================
+
+You can put folders and files into this directories.
+
+The ``internetradio`` directory is hard-coded to display the contents
+of a MediaTomb UPnP server.
+You can remove the check in ``index.php#handleRequest()`` if you do not
+want this.
+
+
+File types
+==========
+Directory
+  A directory is browsable by your Noxon radio
+``.sh`` file
+  Shell script which is shown as directory and which gets executed
+  when navigating into it.
+  Output is shown as it is for ``.txt`` files.
+
+  I use it to control my house's heating system from the radio.
+``.auto.sh``
+  Shell script which gets executed when browsing the folder.
+  The output is integrated into the directory listing with the same
+  rules as for ``.txt`` files.
+
+  You can use this to show the current time within the directory listing.
+``.txt`` file
+  Text files are rendered as un-actionable lists.
+
+  Empty lines get removed, consecutive spaces get collapsed.
+``.url`` file
+  Podcast feed URL file.
+
+  Simply contains the URL to the podcast's MP3 RSS feed.
+
+File extensions get removed for display purposes.
 
 
 =====
@@ -32,6 +76,12 @@ by this tool::
     gatekeeper.my-noxon.net
 
 
+MediaTomb
+=========
+To be able to browse a MediaTomb server, copy ``data/config.php.dist`` to
+``data/config.php`` and fill it with mediatomb web interface credentials.
+
+
 =======
 License
 =======
diff --git a/www/index.php b/www/index.php
index b742632..2a38037 100644
--- a/www/index.php
+++ b/www/index.php
@@ -80,13 +80,16 @@ function handleRequest($path)
         return;
     }
 
+    $ext = pathinfo($path, PATHINFO_EXTENSION);
     if (is_dir($fullPath)) {
         sendDir($path);
-    } else if (substr($path, -4) == '.url') {
+    } else if ($ext == 'url') {
         require_once 'podcasts.php';
         sendPodcast($path);
-    } else if (substr($path, -4) == '.txt') {
+    } else if ($ext == 'txt') {
         sendTextFile($path);
+    } else if ($ext == 'sh') {
+        sendScript($path);
     } else {
         sendMessage('Unknown file type');
     }
@@ -108,17 +111,21 @@ function sendDir($path)
     $count = 0;
     foreach ($entries as $entry) {
         $urlPath = pathEncode(substr($entry, strlen($varDir)));
+        $ext = pathinfo($entry, PATHINFO_EXTENSION);
         if (is_dir($entry)) {
             ++$count;
             $listItems[] = getDirItem(basename($entry), $urlPath . '/');
-        } else if (substr($entry, -4) == '.url') {
+        } else if ($ext == 'url') {
             //podcast
             ++$count;
             $listItems[] = getPodcastItem(basename($entry, '.url'), $urlPath);
-        } else if (substr($entry, -4) == '.txt') {
+        } else if (substr($entry, -8) == '.auto.sh') {
+            //automatically execute script while listing this directory
+            addScriptOutput($listItems, $entry);
+        } else if ($ext == 'txt' || $ext == 'sh') {
             //plain text file
             ++$count;
-            $listItems[] = getDirItem(basename($entry, '.txt'), $urlPath);
+            $listItems[] = getDirItem(basename($entry, '.' . $ext), $urlPath);
         }
     }
     if (!$count) {
@@ -127,6 +134,30 @@ function sendDir($path)
     sendListItems($listItems);
 }
 
+function sendScript($path)
+{
+    global $varDir;
+
+    $listItems = array();
+    addPreviousItem($listItems, $path);
+
+    $fullPath = $varDir . $path;
+    addScriptOutput($listItems, $fullPath);
+    sendListItems($listItems);
+}
+
+function addScriptOutput(&$listItems, $fullPath)
+{
+    exec($fullPath . ' 2>&1', $output, $retVal);
+
+    if ($retVal == 0) {
+        addTextLines($listItems, $output);
+    } else {
+        $listItems[] = getMessageItem('Error executing script');
+        addTextLines($listItems, $output);
+    }
+}
+
 function sendTextFile($path)
 {
     global $varDir;
@@ -134,13 +165,18 @@ function sendTextFile($path)
     addPreviousItem($listItems, $path);
 
     $lines = file($varDir . $path);
+    addTextLines($listItems, $lines);
+    sendListItems($listItems);
+}
+
+function addTextLines(&$listItems, $lines)
+{
     foreach ($lines as $line) {
         $line = trim($line);
         if ($line != '') {
             $listItems[] = getDisplayItem($line);
         }
     }
-    sendListItems($listItems);
 }
 
 function getDisplayItem($line)
-- 
2.30.2