functions put in a separate file, so that they can be used by plugins

[bizou.git] / functions.php

diff --git a/functions.php b/functions.php
new file mode 100644 (file)
index 0000000..162b01e
--- /dev/null
+++ b/functions.php
@@ -0,0 +1,134 @@
+<?php
+
+// load plugins
+$plugins = array();
+if (is_dir("plugins")) {
+       $plugins = scandir("plugins");
+       array_shift($plugins); array_shift($plugins); // remove . and ..
+       foreach ($plugins as $p) if (is_file("plugins/$p/functions.php"))
+               require "plugins/$p/functions.php";
+}
+
+function plugins_include($phpFile)
+{
+       foreach ($GLOBALS['plugins'] as $p) if (is_file("plugins/$p/$phpFile"))
+               require "plugins/$p/$phpFile";
+}
+
+function getPathInfo()
+{
+       $simplePath = $_SERVER["PATH_INFO"];
+       if ($simplePath == '/') $simplePath = '';
+       // extra security check to avoid /photos/index/../.. like urls, maybe useless but..
+       if (strpos($simplePath, '..') !== false) die(".. found in url");
+       return $simplePath;
+}
+
+
+if (! function_exists('getImageLink')) {
+function getImageLink($imageSimplePath)
+{
+       return $GLOBALS['rootUrl'].IMAGES_DIR.$imageSimplePath;
+}
+}
+
+function getPreview($imgFile, $maxSize = THUMB_SIZE)
+{
+       # example: data/myalbum/100.mypic.jpg
+       $newImgFile = DATA_DIR."/".dirname($imgFile)."/".$maxSize.".".basename($imgFile);
+       
+       # if the preview is a symlink, image is already good sized
+       if (is_link($newImgFile)) return $imgFile;
+       
+       if (! is_file($newImgFile))
+       {
+               # this tels the template to flush output after displaying previews
+               $GLOBALS["generating"] = true;
+
+               # reset script time limit to 20s (wont work in safe mode)
+               set_time_limit(20);
+
+               $ext = strtolower(substr($imgFile, -4));
+               if ($ext == ".jpg")
+                       $img = imagecreatefromjpeg($imgFile);
+               else
+                       $img = imagecreatefrompng($imgFile);
+
+               $w = imagesx($img);
+               $h = imagesy($img);
+               # if the image is already small, make a symlink, and return it
+               if ($w <= $maxSize and $h <= $maxSize) {
+                       imagedestroy($img);
+                       symlink($imgFile, $newImgFile);
+                       return $imgFile;
+               }
+
+               # uncomment this if you need group writable files
+               #umask(0002);
+               # create the thumbs directory recursively
+               if (! is_dir(dirname($newImgFile))) mkdir(dirname($newImgFile), 0777, true);
+
+               if ($w > $h) {
+                       $newW = $maxSize;
+                       $newH = $h/($w/$maxSize);
+               } else {
+                       $newW = $w/($h/$maxSize);
+                       $newH = $maxSize;
+               }
+
+               $newImg = imagecreatetruecolor($newW, $newH);
+
+               imagecopyresampled($newImg, $img, 0, 0, 0, 0, $newW, $newH, $w, $h);
+
+               if ($ext == ".jpg")
+                       imagejpeg($newImg, $newImgFile);
+               else
+                       imagepng($newImg, $newImgFile);
+               
+               imagedestroy($img);
+               imagedestroy($newImg);
+       }
+
+       return $newImgFile;
+}
+
+function getAlbumPreview($dir)
+{
+       $previewFile = DATA_DIR."/$dir/albumpreview";
+
+       if (is_file("$previewFile.jpg")) {
+               return "$previewFile.jpg";
+       } else if (is_file("$previewFile.empty")) {
+               return "";
+       } else if (is_file("$previewFile.png")) {
+               return "$previewFile.png";
+       } else {
+               # uncomment this if you need group writable files
+               #umask(0002);
+               # create the thumbs directory recursively
+               if (! is_dir(dirname($previewFile))) mkdir(dirname($previewFile), 0777, true);
+
+               // no preview: look for a preview in current dir, write it, return it
+               foreach (scandir($dir) as $file) if ($file != '.' and $file != '..') {
+                       $ext = strtolower(substr($file, -4));
+                       if ($ext == ".jpg" or $ext == ".png") {
+                               $thumb = getPreview("$dir/$file");
+                               copy($thumb, $previewFile.$ext);
+                               return $previewFile.$ext;
+                       } else if (is_dir("$dir/$file")) {
+                               $subPreview = getAlbumPreview("$dir/$file");
+                               if ($subPreview) {
+                                       $myPreview = dirname($previewFile)."/".basename($subPreview);
+                                       copy($subPreview, $myPreview);
+                                       return $myPreview;
+                               }
+                       }
+               }
+
+               // nothing found. create empty file
+               touch("$previewFile.empty");
+               return "";
+       }
+}
+
+?>