--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/channel/ad_channel.inc	Thu Apr 02 15:28:21 2009 +0000
@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @file
+ * Ad Channel include file.
+ *
+ * Copyright (c) 2008-2009.
+ *   Jeremy Andrews <jeremy@tag1consulting.com>.
+ */
+
+/**
+ * Filter advertisements not in an appropriate channel, from cache.
+ */
+function ad_channel_cache_filter($ads) {
+  _debug_echo("ad_channel_cache: adserve_cache_filter");
+
+  $channels = adserve_cache('get_cache', 'channel');
+  $valid = array();
+  $nochannel = array();
+  foreach ($ads as $aid) {
+    _debug_echo("ad_channel_cache: checking aid($aid)");
+    if (is_array($channels['ads']) && isset($channels['ads'][$aid]) &&
+        is_array($channels['ads'][$aid])) {
+      foreach ($channels['ads'][$aid] as $chid) {
+        $channel = $channels['channels'][$chid];
+        $display = $channel->display;
+        $urls = unserialize($channel->urls);
+        $frontpage = adserve_variable('site_frontpage') ? adserve_variable('site_frontpage') : 'node';
+        $regexp = '/^('. preg_replace(array('/(\r\n?|\n)/', '/\\\\\*/', '/(^|\|)\\\\<front\\\\>($|\|)/'), array('|', '.*', '\1'. preg_quote($frontpage, '/') .'\2'), preg_quote($urls, '/')) .')$/';
+        $match = preg_match($regexp, adserve_variable('url'));
+        _debug_echo("ad_channel_cache: checking aid($aid) against channel($chid) path(". adserve_variable('url') .") regexp($regexp) match($match)");
+        if ($display == 0) { // display on all except listed urls
+          if (empty($urls) || !$match) {
+            _debug_echo("ad_channel_cache: aid($aid) is valid");
+            $valid[] = $aid;
+            break;
+          }
+        }
+        else { // display only on listed urls
+          if (!empty($urls) && $match) {
+            _debug_echo("ad_channel_cache: aid($aid) is valid");
+            $valid[] = $aid;
+            break;
+          }
+        }
+        _debug_echo("ad_channel_cache: aid($aid) is not valid");
+      }
+    }
+    else {
+      // no channel information for ad, it's valid
+      $display = $channels['display'];
+      _debug_echo("ad_channel_cache: aid($aid) has no channel info [$display]");
+      switch ($display) {
+        case 0:
+          $nochannel[] = $aid;
+          _debug_echo("ad_channel_cache: aid($aid) is valid if no valid ads found in current channel");
+          break;
+        case 1:
+          $valid[] = $aid;
+          _debug_echo("ad_channel_cache: aid($aid) is valid");
+          break;
+        case 2:
+          _debug_echo("ad_channel_cache: aid($aid) is not valid");
+          break;
+      }
+    }
+  }
+
+  if (empty($valid) && !empty($nochannel)) {
+    _debug_echo("ad_channel_cache: using ads with no channel info");
+    $valid = $nochannel;
+  }
+
+  $premiere = adserve_cache('get_cache', 'premiere');
+  $premieres = array();
+  if (is_array($premiere)) {
+    foreach ($valid as $aid) {
+      if (in_array($aid, $premiere)) {
+        _debug_echo("ad_channel_cache: aid($aid) is premiere advertisement");
+        $premieres[$aid] = $aid;
+      }
+      else {
+        _debug_echo("ad_channel_cache: aid($aid) is not a premiere advertisement");
+      }
+    }
+    if (!empty($premieres)) {
+      _debug_echo("ad_channel_cache: returning premiere advertisements");
+      return $premieres;
+    }
+  }
+  _debug_echo("ad_channel_cache: returning non-premiere advertisements");
+  return $valid;
+}