add GetRecord to OAI request

app/Models/OaiModelError.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Models;
+
+class OaiModelError
+{
+/**
+ * Define all valid error codes.
+ */
+    const BADVERB = 1010;
+    const BADARGUMENT = 1011;
+    const CANNOTDISSEMINATEFORMAT = 1012;
+    const BADRESUMPTIONTOKEN = 1013;
+    const NORECORDSMATCH = 1014;
+    const IDDOESNOTEXIST = 1015;
+    /**
+     * Holds OAI error codes for internal error numbers.
+     *
+     * @var array  Valid OAI parameters.
+     */
+    protected static $oaiErrorCodes = array(
+        self::BADVERB => 'badVerb',
+        self::BADARGUMENT => 'badArgument',
+        self::NORECORDSMATCH => 'noRecordsMatch',
+        self::CANNOTDISSEMINATEFORMAT => 'cannotDisseminateFormat',
+        self::BADRESUMPTIONTOKEN => 'badResumptionToken',
+        self::IDDOESNOTEXIST => 'idDoesNotExist',
+    );
+    /**
+     * Map internal error codes to OAI error codes.
+     *
+     * @param int $code Internal error code.
+     * @return string OAI error code.
+     */
+    public static function mapCode($code)
+    {
+        if (false === array_key_exists($code, self::$oaiErrorCodes)) {
+            throw new Oai_Model_Exception("Unknown oai error code $code");
+        }
+        return self::$oaiErrorCodes[$code];
+    }
+}