Merge pull request #24 from tmos/master

RSS implementation

.gitignore

@@ -1,2 +1,7 @@
 photos/
 thumbs/
+db_feed_source
+db_old_files
+db_rss_timestamp
+rss.locker
+new_files_list

config.php

@@ -27,7 +27,7 @@ $sorting_folders		= "name"; // Sort folders by: [name][date]
 $sorting_files			= "name"; // Sort files by: [name][date][size]
 $sortdir_folders		= "ASC"; // Sort direction of folders: [ASC][DESC]
 $sortdir_files			= "ASC"; // Sort direction of files: [ASC][DESC]
-$lazyload				= 1; // 0 = pagination, 1 = display all pictures on one page.
+$lazyload				= 1; // 0 = pagination, 1 = display all pictures on one page
 
 //LANGUAGE STRINGS
 $label_home 			= "Home"; //Name of home link in breadcrumb navigation
@@ -37,8 +37,15 @@ $label_all 				= "All"; //Text used for link to display all images in one page
 $label_noimages 		= "No images"; //Empty folder text
 $label_loading 			= "Loading..."; //Thumbnail loading text
 
+//RSS SETTINGS
+$gallery_link			= substr("http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'], 0, strlen("http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'])-7); // the -7 is to remove "rss.php"
+$description			= "MiniGal Nano";
+$nb_items_rss			= 25; //number ef elements to display in the feed. If you add a lot of pictures at the time, consider increasing this number
+$rss_refresh_interval	= 60;//time, in seconds, between two RSS refresh. for example, 3600 = 1update max per hour, 86400 = 1/day.
+$SkipExts				= array('html', 'txt', 'php', "gitignore"); //Files with one of this extension will not be displayed on the RSS feed
+$SkipObjects			= array('UnDossier', 'UnFichier'); //Those files and folders will not be displayed on the RSS feed
 //ADVANCED SETTINGS
 $thumb_size 			= 320; //Thumbnail height/width (square thumbs). Changing this will most likely require manual altering of the template file to make it look properly! 
 $label_max_length 		= 40; //Maximum chars of a folder name that will be displayed on the folder thumbnail  
-$display_exif			= 0; //Take care, even if not diplayed EXIF are still readable for visitors. May be a good idea to erase EXIF datas...
+$display_exif			= 0; //Take care, even if not diplayed EXIF are still readable for visitors. May be a good idea to erase EXIF data...
-?>
+?>

rss.php

@@ -0,0 +1,153 @@
+<?php 
+/*===================*/
+/*Functions*/
+/*===================*/
+	# Hardly inspired from here : codes-sources.commentcamarche.net/source/35937-creation-d-une-arborescenceI
+	# Listing all files of a folder and sub folders. 
+	function ListFiles($gallery_link, &$content, $Folder, $SkipFileExts, $SkipObjects)
+	{
+		$dir = opendir($Folder);
+		while (false !== ($Current = readdir($dir))) // Loop on all contained on the folder
+		{
+			if ($Current !='.' && $Current != '..' && in_array($Current, $SkipObjects)===false)
+			{
+				if(is_dir($Folder.'/'.$Current)) // If the current element is a folder
+				{
+					ListFiles($gallery_link, $content, $Folder.'/'.$Current, $SkipFileExts, $SkipObjects); // Recursivity
+				}
+				else
+				{
+					$FileExt = strtolower(substr(strrchr($Current ,'.'),1));
+					if (in_array($FileExt, $SkipFileExts)===false) // Should we display this extension ?
+						$current_adress = $gallery_link . "/" . $Folder.'/'. $Current;
+						$content .=  $current_adress. "\n";
+				}
+			}
+		}
+		closedir($dir); 
+		return $content;
+	}
+
+	# Paul's Simple Diff Algorithm v 0.1 : http://paulbutler.org/archives/a-simple-diff-algorithm-in-php/
+	function diff($old, $new){
+		$matrix = array();
+		$maxlen = 0;
+		foreach($old as $oindex => $ovalue){
+			$nkeys = array_keys($new, $ovalue);
+			foreach($nkeys as $nindex){
+				$matrix[$oindex][$nindex] = isset($matrix[$oindex - 1][$nindex - 1]) ?
+					$matrix[$oindex - 1][$nindex - 1] + 1 : 1;
+				if($matrix[$oindex][$nindex] > $maxlen){
+					$maxlen = $matrix[$oindex][$nindex];
+					$omax = $oindex + 1 - $maxlen;
+					$nmax = $nindex + 1 - $maxlen;
+				}
+			}   
+		}
+		if($maxlen == 0) return array(array('d'=>$old, 'i'=>$new));
+		return array_merge(
+			diff(array_slice($old, 0, $omax), array_slice($new, 0, $nmax)),
+			array_slice($new, $nmax, $maxlen),
+			diff(array_slice($old, $omax + $maxlen), array_slice($new, $nmax + $maxlen)));
+	}
+
+	function print_array($array_to_display) {
+		echo '<pre>';
+		print_r($array_to_display);
+		echo '</pre>';
+	}
+/*===================*/
+/*Variables*/
+/*===================*/
+	require("config.php");
+	#$content = "";
+	$old_files_list  = "db_old_files"; //list of files in ./photos
+	$db_feed_source = "db_feed_source";
+	$db_rss_timestamp = "db_rss_timestamp";
+	$Folder =  'photos';
+	$content = ListFiles($gallery_link, $content, $Folder, $SkipExts, $SkipObjects);
+	$to_store = "";
+	// Init files
+	if (!file_exists($old_files_list))
+	{
+		file_put_contents($old_files_list, "");
+	}
+	if (!file_exists($db_feed_source))
+	{
+		file_put_contents($db_feed_source, "");
+	}
+	if (!file_exists($db_rss_timestamp))
+	{
+		file_put_contents($db_rss_timestamp, "");
+	}
+
+/*===================*/
+/*Computing*/
+/*===================*/
+	#Todo : ajouter une condition : dois-je regénérer le flux ou utiliser les anciens fichiers ?
+	$temp = file_get_contents($db_feed_source);
+	$last_rss_gen = file_get_contents($db_rss_timestamp);
+	$current_time = time();
+	//If the RSS generation is already launched, don't do a second generation at the same time
+	if (($current_time - $last_rss_gen) > $rss_refresh_interval && file_exists("rss.locker") == false)
+	{	
+		file_put_contents("rss.locker", "");
+		file_put_contents($db_rss_timestamp, time());
+		// Load the list from files.
+		$old_files_list_content = explode("\n", file_get_contents($old_files_list));
+		$new_files_list_content = explode("\n", $content); #debug 
+		// Generate and stock new elements
+		$differences = diff($old_files_list_content, $new_files_list_content);
+		for ($i=0; $i < count($differences); $i++)
+		{ 
+			if (is_array($differences[$i]))
+			{
+				for ($j=0; $j < count($differences[$i]["i"]); $j++)
+				{ 
+					if (strlen($differences[$i]["i"][$j]) > 2)
+					{
+						$to_store .= $differences[$i]["i"][$j] . "\n";
+					}
+				}	
+			}
+		}
+		//Add new elements at the top of the feed's source
+		$temp = $to_store . $temp;
+		file_put_contents($db_feed_source, $temp);
+		// Store the current file list for the next generation
+		file_put_contents($old_files_list, $content);
+		unlink("rss.locker");
+	}
+/*===================*/
+/*XML Gen*/
+/*===================*/
+	$temp = explode("\n", $temp);
+	$pieceOfTitle;
+	$titleLenght;
+	echo "
+		<rss version=\"2.0\">
+			<channel>
+			<title>".$title."</title>
+			<link>".$gallery_link."</link>
+			<description>".$description."</description>
+		";
+		for ($i=0; $i < $nb_items_rss; $i++) { 
+			$pieceOfTitle = strrchr ($temp[$i] , "/");
+			$titleLenght = strlen($pieceOfTitle) - strlen(strrchr($pieceOfTitle, "."));
+			echo
+				"<item>
+					<title>" . substr($pieceOfTitle, 1, $titleLenght-1) . "</title>
+					<link>". $temp[$i] . "</link>
+					<description>
+						<![CDATA[ <img src=\"" . $temp[$i] . "\"> ]]>
+					</description>
+				</item>"
+			;
+			if ($temp[$i+1] == NULL)
+				break;
+		}
+		echo"
+			</channel>
+		</rss>
+	";
+?>

templates/board.html

@@ -6,7 +6,7 @@
 		<meta name="generator" content="MinigalNano <% version %>" />
 		<title><% title %></title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
-		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss/" />
+		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss.php" />
 
 		<link rel="stylesheet" href="<% gallery_root %>css/mediaboxWhite.css" type="text/css" media="screen" />
 		<style type="text/css">
@@ -193,7 +193,7 @@
 			<a href="http://tomcanac.com/minigal/" title="Tom Canac" target="_blank">
 				Board theme by Tom Canac
 			</a> /
-			<a  title="<% title %> RSS" href="rss/">
+			<a  title="<% title %> RSS" href="rss.php">
 				RSS
 			</a>
 		</footer>

templates/darkgold3.html

@@ -6,7 +6,7 @@
 		<meta name="generator" content="MinigalNano <% version %>" />
 		<title><% title %></title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
-		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss/" />
+		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss.php" />
 		
 		<link rel="stylesheet" href="<% gallery_root %>css/mediaboxWhite.css" type="text/css" media="screen" />
 		<style type="text/css">
@@ -206,7 +206,7 @@
 			<a href="https://github.com/sebsauvage/MinigalNano" title="Powered by MiniGal Nano" target="_blank">
 				Powered by MiniGal Nano <% version %>
 			</a> |
-			<a  title="<% title %> RSS" href="rss/">
+			<a  title="<% title %> RSS" href="rss.php">
 				RSS
 			</a>
 		</footer>

templates/darksideboard.html

@@ -6,7 +6,7 @@
 		<meta name="generator" content="MinigalNano <% version %>" />
 		<title><% title %></title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
-		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss/" />
+		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss.php" />
 
 		<link rel="stylesheet" href="<% gallery_root %>css/mediaboxWhite.css" type="text/css" media="screen" />
 		<style type="text/css">
@@ -192,7 +192,7 @@
 			<a href="http://tomcanac.com/minigal/" title="Tom Canac" target="_blank">
 				Board theme by Tom Canac
 			</a> /
-			<a  title="<% title %> RSS" href="rss/">
+			<a  title="<% title %> RSS" href="rss.php">
 				RSS
 			</a>
 		</footer>

templates/rounded.html

@@ -6,7 +6,7 @@
 		<meta name="generator" content="MinigalNano <% version %>" />
 		<title><% title %></title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
-		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss/" />
+		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss.php" />
 
 		<link rel="stylesheet" href="<% gallery_root %>css/mediaboxWhite.css" type="text/css" media="screen" />
 		<style type="text/css">
@@ -211,7 +211,7 @@
 			<a href="http://tomcanac.com/minigal/" title="Tom Canac" target="_blank">
 				Rounded theme by Tom Canac
 			</a> /
-			<a  title="<% title %> RSS" href="rss/">
+			<a  title="<% title %> RSS" href="rss.php">
 				RSS
 			</a>
 		</footer>

templates/squares.html

@@ -6,7 +6,7 @@
 		<meta name="generator" content="MinigalNano <% version %>" />
 		<title><% title %></title>
 		<meta name="viewport" content="width=device-width, initial-scale=1.0">
-		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss/" />
+		<link rel="alternate" type="application/rss+xml" title="<% title %>" href="rss.php" />
 
 		<link rel="stylesheet" href="<% gallery_root %>css/mediaboxWhite.css" type="text/css" media="screen" />
 		<style type="text/css">
@@ -189,7 +189,7 @@
 			<a href="http://tomcanac.com/minigal/" title="Tom Canac" target="_blank">
 				Squares theme by Tom Canac
 			</a> /
-			<a  title="<% title %> RSS" href="rss/">
+			<a  title="<% title %> RSS" href="rss.php">
 				RSS
 			</a>
 		</footer>