removed mods directory from the ATutor codebase

[atutor.git] / mods / wiki / plugins / lib / cache.php

diff --git a/mods/wiki/plugins/lib/cache.php b/mods/wiki/plugins/lib/cache.php
deleted file mode 100644 (file)
index e050d7a..0000000
--- a/mods/wiki/plugins/lib/cache.php
+++ /dev/null
@@ -1,136 +0,0 @@
-<?php
-
-/*
-   This plugin can cache readily rendered pages either as files or in the
-   ewiki database, so they will show up much faster when accessed a second
-   time.
-
-   Right now it only supports storing the fully rendered page (_CACHE_FULL).
-   Storing of page plugins output (_CACHE_ALL) should be kept disabled,
-   because "UpdatedPages" and so on cannot be verified to not have updated
-   since the cache entry was written.
-   Also you may want to disallow caching of the "links" action, because
-   there is no change tracking with it.
-*/
-
-#-- how and which pages to store
-define("EWIKI_CACHE_FULL", 1);   # including control links line?
-define("EWIKI_CACHE_ALL", 0);    # also virtual pages?
-define("EWIKI_CACHE_VTIME", 1000);  # time to keep page plugins` output, NYI
-
-#-- where to store the pre-rendered pages (DB or files) - unset one of them:
-define("EWIKI_CACHE_DIR", "./var/cache");    # preferred over db storage
-define("EWIKI_CACHE_DB", "system/cache/");   # only has effect, if _DIR undefined
-
-#-- when to store rendered pages?
-$ewiki_config["cache.actions"] = array(
-   "view", "info",
-   "links", 
-);
-
-
-#-- plugin glue
-if (EWIKI_CACHE_FULL) {
-   $ewiki_plugins["handler"][] = "ewiki_handler_cache_full";
-   $ewiki_plugins["page_final"][] = "ewiki_store_cache_full";
-}
-else {
-   die("unsupported ewiki caching guideline setting");
-}
-
-
-#-- init
-if (defined("EWIKI_CACHE_DIR") && !file_exists(EWIKI_CACHE_DIR)) {
-   @mkdir(dirname(EWIKI_CACHE_DIR));
-   mkdir(EWIKI_CACHE_DIR);
-}
-
-
-#-- fetch cache entry for page
-function ewiki_get_cache($action, $id) {
-   $row = array();
-   if (defined("EWIKI_CACHE_DIR") && EWIKI_CACHE_DIR) {
-      $file = EWIKI_CACHE_DIR . "/" . $action . "," . urlencode($id);
-      if (file_exists($file)) {
-         $f = gzopen($file, "r");
-         if ($f) {
-            $content = gzread($f, 1<<17);
-            fclose($f);
-            if ($content) {
-               $row = array(
-                  "id" => $id,
-                  "version" => 1,
-                  "flags" => EWIKI_DB_F_BINARY¦EWIKI_DB_F_TEXT|EWIKI_DB_F_HTML,
-                  "created" => filectime($file),
-                  "lastmodified" => filemtime($file),
-                  "content" => $content,
-                  "meta" => array("class"=>"cache"),
-               );
-            }
-         }
-      }
-   }
-   elseif (defined("EWIKI_CACHE_DB") && (EWIKI_CACHE_DB)) {
-      $id = EWIKI_CACHE_DB."$action/$id";
-      $row = ewiki_db::GET($id);
-   }
-   return($row);
-}
-
-
-#-- return rendered page
-function ewiki_handler_cache_full($id, &$data, $action) {
-   global $ewiki_config;
-   if (in_array($action, $ewiki_config["cache.actions"]) && ($cache = ewiki_get_cache($action,$id))) {
-      if ($cache["lastmodified"] >= $data["lastmodified"]) {
-         $data = &$cache;
-         ewiki_http_headers($data["content"], $id, $cache, $action);
-         return($data["content"]);
-      }
-   }
-}
-
-
-#-- if we get here, we should store the rendered page
-function ewiki_store_cache_full(&$o, $id, &$data, $action) {
-   global $ewiki_config;
-   if (in_array($action, $ewiki_config["cache.actions"]) && ($data["version"] || EWIKI_CACHE_ALL) && ($_SERVER["REQUEST_METHOD"]=="GET")) {
-
-      #-- only store, if we got just a few QueryString parameters
-      if (count($_GET) <= 2) {
-         ewiki_put_cache($action, $id, $o);
-      }
-   }
-}
-
-
-#-- real save function
-function ewiki_put_cache($action, $id, &$o) {
-   #-- save into cache dir
-   if (defined("EWIKI_CACHE_DIR") && EWIKI_CACHE_DIR) {
-      $file = EWIKI_CACHE_DIR . "/" . $action . "," . urlencode($id);
-      $f = gzopen($file, "w9");
-      if ($f) {
-         gzwrite($f, $o);
-         fclose($f);
-      }
-   }
-   #-- store in ewiki database
-   elseif (defined("EWIKI_CACHE_DB") && (EWIKI_CACHE_DB)) {
-      $id = EWIKI_CACHE_DB."$action/$id";
-      $save = array(
-         "id" => $id,
-         "version" => 1,
-         "flags" => EWIKI_DB_F_BINARY¦EWIKI_DB_F_TEXT|EWIKI_DB_F_HTML,
-         "created" => $data["lastmodified"],
-         "lastmodified" => time(),
-         "content" => &$o,
-         "meta" => array("class"=>"cache"),
-         "author" => ewiki_author("ewiki_cache"),
-      );
-      ewiki_db::WRITE($save, true);
-   }
-}
-
-
-?>
\ No newline at end of file