Added REST lib to OpenMeetings plugin - refs BT#7046 refs #5491

plugin/openmeetings/lib/openmeetings_rest_service.php

@@ -0,0 +1,172 @@
+<?php
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License") +  you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+/**
+ * Created on 03.01.2012 by eugen.schwert@gmail.com
+ * @package chamilo.plugin.openmeetings
+ * @requires CURL
+ */
+/**
+ * Class OpenMeetingsRestService
+ */
+class OpenMeetingsRestService
+{
+	function call($request, $returnAttribute = "return")
+    {
+		// This will allow you to view errors in the browser
+		// Note: set "display_errors" to 0 in production
+		// ini_set('display_errors',1);
+		
+		// Report all PHP errors (notices, errors, warnings, etc.)
+		// error_reporting(E_ALL);
+		
+		// URI used for making REST call. Each Web Service uses a unique URL.
+		// $request
+		
+		// Initialize the session by passing the request as a parameter
+		$session = curl_init ( $request );
+		
+		// Set curl options by passing session and flags
+		// CURLOPT_HEADER allows us to receive the HTTP header
+		curl_setopt ( $session, CURLOPT_HEADER, true );
+		
+		// CURLOPT_RETURNTRANSFER will return the response
+		curl_setopt ( $session, CURLOPT_RETURNTRANSFER, true );
+		
+		// Make the request
+		$response = curl_exec ( $session );
+		
+		// Close the curl session
+		curl_close ( $session );
+		
+		// Confirm that the request was transmitted to the OpenMeetings! Image Search Service
+		if (! $response) {
+			die ( "Request OpenMeetings! OpenMeetings Service failed and no response was returned." );
+		}
+		
+		// Create an array to store the HTTP response codes
+		$status_code = array ();
+		
+		// Use regular expressions to extract the code from the header
+		preg_match ( '/\d\d\d/', $response, $status_code );
+		
+		// Check the HTTP Response code and display message if status code is not 200 (OK)
+		switch ($status_code [0]) {
+			case 200 :
+				// Success
+				break;
+			case 503 :
+				die ( 'Your call to OpenMeetings Web Services failed and returned an HTTP status of 503.   
+			                     That means: Service unavailable. An internal problem prevented us from returning data to you.' );
+				break;
+			case 403 :
+				die ( 'Your call to OpenMeetings Web Services failed and returned an HTTP status of 403.   
+			                     That means: Forbidden. You do not have permission to access this resource, or are over your rate limit.' );
+				break;
+			case 400 :
+				// You may want to fall through here and read the specific XML error
+				die ( 'Your call to OpenMeetings Web Services failed and returned an HTTP status of 400.   
+			                     That means:  Bad request. The parameters passed to the service did not match as expected.   
+			                     The exact error is returned in the XML response.' );
+				break;
+			default :
+				die ( 'Your call to OpenMeetings Web Services returned an unexpected HTTP status of: ' . $status_code [0] . " Request " . $request );
+		}
+		
+			// Get the XML from the response, bypassing the header
+		if (!($xml = strstr($response, '<ns'))) {
+			$xml = null;
+		}
+			
+		$dom = new DOMDocument();
+		$dom->loadXML($xml);
+			
+		if ($returnAttribute == "") {
+			//echo "XML".$xml."<br/>";
+			return $this->getArray($dom);
+		} else {
+			$returnNodeList = $dom->getElementsByTagName($returnAttribute);
+			$ret = array();
+			foreach ($returnNodeList as $returnNode) {
+				if ($returnNodeList->length == 1) {
+					return $this->getArray($returnNode);
+				} else {
+					$ret[] = $this->getArray($returnNode);
+				}
+			}
+			return $ret;
+		}
+			
+	}
+
+	function getArray($node) {
+		if (is_null($node) || !is_object($node)) {
+			return $node;
+		}
+		$array = false;
+		/*
+			echo("!!!!!!!! NODE " . XML_TEXT_NODE
+					. " :: name = " . $node->nodeName
+					. " :: local = " . $node->localName
+					. " :: childs ? " . $node->hasChildNodes()
+					. " :: count = " . ($node->hasChildNodes() ? $node->childNodes->length : -1)
+					. " :: type = " . $node->nodeType
+					. " :: val = " . $node->nodeValue
+					. "\n");
+		/*
+		if ($node->hasAttributes()) {
+			foreach ($node->attributes as $attr) {
+				$array[$attr->nodeName] = $attr->nodeValue;
+			}
+		}
+		*/
+		if ($node->hasChildNodes()) {
+			foreach ($node->childNodes as $childNode) {
+				if ($childNode->nodeType != XML_TEXT_NODE) {
+					if ($node->hasAttributes()) {
+						foreach ($node->attributes as $attr) {
+							if ($attr->localName == "nil") {
+								return null;
+							}
+						}
+					}
+					if ($childNode->childNodes->length == 1) {
+						$array[$childNode->localName] = $this->getArray($childNode);
+					} else {
+						$array[$childNode->localName][] = $this->getArray($childNode);
+					}
+				} else {
+					return $childNode->nodeValue;
+					//echo("!!!!!!!! TEXT " . $childNode->nodeValue . "\n");
+					//$array[$childNode->localName]
+				}
+			}
+		}
+
+		return $array;
+	}
+
+	function getError(){
+		return false;
+	}
+
+	function fault(){
+		return false;
+	}
+}