DMAPISchemaController.php

<?php
#
# dmBridge: a data access framework for CONTENTdm(R)
#
# Copyright © 2009, 2010, 2011 Board of Regents of the Nevada System of Higher
# Education, on behalf of the University of Nevada, Las Vegas
#

class DMAPISchemaController extends DMAbstractController {

   private static function tryToOutputSchemaAtPath($schema_name, $path) {
      $it = new RecursiveDirectoryIterator($path);
      foreach (new RecursiveIteratorIterator($it) as $filename) {
         if (strpos(realpath($filename), "/.") === false) {
            if ($schema_name == basename($filename)) {
               header("Content-Type: " . DMMediaType::getTypeForExtension(
                     DMHTTPRequest::getCurrent()->getURI()->getExtension()));
               die(file_get_contents($filename));
            }
         }
      }
   }

   public function index($schema_name) {
      if (!$schema_name) {
         header("HTTP/1.1 404 Not Found");
         die;
      }
      // first, scan for built-in schemas
      self::tryToOutputSchemaAtPath($schema_name,
            dirname(__FILE__) . "/../../includes/schema");

      // not found, check modules
      $mm = DMModuleManager::getInstance();
      foreach ($mm->getEnabledModules() as $module) {
         if ($module instanceof DMBridgeRepresentationSchemaModule) {
            self::tryToOutputSchemaAtPath($schema_name,
                  $module->getPathToSchemas());
         }
      }

      $response = new DMHTTPResponse();
      $rep = DMHTTPResponseFactory::getRepresentation();
      $rep->setMediaType(new DMMediaType("text", "plain"));
      $rep->setBody("Schema not found");
      $response->setStatusCode(404);
      $response->setRepresentation($rep);
      $response->send();
      die;
   }

}