Mercurial > hg > lukkari

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/index.php	Tue Jan 11 20:42:54 2011 +0200
@@ -0,0 +1,127 @@
+<?
+
+$mapfile = "kartta.png";
+$classfile = "luokkatilat.txt";
+$cachefile = "coursecache.txt";
+$baseURI = "http://tnsp.org/luk/?";
+$lukuURI = "http://www.oamk.fi/tyojarjestykset/otek/luokat/OR_";
+$infoURI = "http://www.oamk.fi/opiskelijalle/rakenne/opinto-opas/koulutusohjelmat/?sivu=oj&kieli=FI&opas=2010-2011&vuosi=10S11K&koodi1=";
+
+// Check given parameters
+$luokka = isset($_GET["luokka"]) ? $_GET["luokka"] : "TTE9SNO";
+
+if (!preg_match("#^[A-Z]{3}\d\S+#", $luokka)) {
+  echo "Virhe! Luokan t&auml;ytyy olla muotoa XXXnXXX.<br />\n";
+  exit;
+}
+
+if (isset($_GET["tila"])) {
+  $tila = $_GET["tila"];
+  echo "Luokkatilan n&auml;ytt&ouml;moodi ei viel&auml; tuettu.<br />\n";
+  exit;
+
+  $fp = @fopen($classfile, "rb");
+  if ($fp) {
+    fclose($fp);
+  }
+}
+
+
+// Global cache for course data
+$cache = array();
+$dirty = FALSE;
+
+
+// Try to read cachefile, if we can get file lock on it
+$fp = @fopen($cachefile, "rb");
+if ($fp) {
+  if (flock($fp, LOCK_SH)) {
+    require($cachefile);
+    flock($fp, LOCK_UN);
+  }
+  fclose($fp);
+}
+
+
+function match_course($matches)
+{
+  global $cache, $infoURI, $dirty;
+
+  $id = $matches[1];
+
+  // Check if course exists in cache
+  if (!isset($cache[$id])) {
+    $dirty = TRUE;
+    // Not cached, try to fetch data
+    $data = @file_get_contents($infoURI.$id);
+    if ($data !== FALSE) {
+      if (preg_match("#<td class=\"smallheadercell\"><strong>(.+?)\s+(\d+)\s*op\s*</strong></td>#", $data, $m)) {
+        // Add data to cache
+        $cache[$id] = array("desc" => $m[1], "op" => intval($m[2]));
+      }
+    }
+  }
+
+  if (isset($cache[$id]))
+    return "<a target=\"_blank\" title=\"".htmlentities($id." - ".$cache[$id]["op"]." op").
+    "\" href=\"".htmlentities($infoURI.$id)."\">".htmlentities($cache[$id]["desc"])."</a>";
+  else
+    return htmlentities($id);
+}
+
+
+function match_class($matches)
+{
+  global $baseURI;
+  return "<b><a href=\"".$baseURI."tila=".$matches[1]."\">".$matches[1]."</a></b> ".$matches[2];
+}
+
+
+/* Fetch HTML data and replace occurances of course IDs
+ * with information and a link
+ */
+if (file_exists("OR_".$luokka.".htm"))
+  $data = @file_get_contents("OR_".$luokka.".htm");
+else
+  $data = @file_get_contents($lukuURI.$luokka.".htm");
+
+if ($data !== FALSE) {
+  $data = preg_replace_callback("#<B>([A-Z]\d+)\.?</B>#", match_course, $data);
+
+  $data = preg_replace_callback("#<B>(\d{4}|ATK\d+|[A-Z]{2,3}LAB\d+|[A-Z]{2,3}LAB|Audit\d+)(\(\d+\))?</B>#", match_class, $data);
+
+  $data = preg_replace("#<body class=tt>#", "<body class=tt>\n".
+  "<a href=\"".$lukuURI.$luokka.".htm\">[orig]</a>\n, Luokat: ".
+  "<a href=\"".$baseURI."luokka=TTE0SNO"."\">[TTE0SNO]</a>\n".
+  "<a href=\"".$baseURI."luokka=TTE9SNO"."\">[TTE9SNO]</a>\n", $data);
+  echo $data;
+} else {
+  echo "Luokan datatiedostoa <b>".htmlentities($lukuURI.$luokka.".htm")."</b> ei saatu.<br />\n";
+}
+
+
+// Dump the course data cache, but only if it has changed
+if ($dirty) {
+  // First try append mode
+  $fp = @fopen($cachefile, "rb+");
+
+  // If file didn't exist, try write mode
+  if (!$fp)
+    $fp = @fopen($cachefile, "wb");
+
+  if ($fp) {
+    // Use locking to prevent concurrent access and dump data
+    if (flock($fp, LOCK_EX)) {
+      ftruncate($fp, 0);
+      fwrite($fp, "<?\n\$cache = array(\n");
+      foreach ($cache as $id => $data) {
+        fwrite($fp, "  \"".addslashes($id)."\" => array(\"desc\" => \"".
+        addslashes($data["desc"])."\", \"op\" => ".$data["op"]."),\n");
+      }
+      fwrite($fp, ");\n?>");
+    }
+    fclose($fp);
+  }
+}
+
+?>
\ No newline at end of file