From e6ba73430b79632f83c7ef636f0e8fca62b4d4f1 Mon Sep 17 00:00:00 2001
From: Anonymous Contributor <anonymous@invalid>
Date: Sun, 10 Sep 2023 07:41:42 +0200
Subject: [PATCH] Add simple OpenSimulator RestConsole client

---
 app/opensim/RestConsole.php | 124 ++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 app/opensim/RestConsole.php

diff --git a/app/opensim/RestConsole.php b/app/opensim/RestConsole.php
new file mode 100644
index 0000000..3c9ec40
--- /dev/null
+++ b/app/opensim/RestConsole.php
@@ -0,0 +1,124 @@
+<?php
+declare(strict_types=1);
+
+namespace Mcp\Opensim;
+
+use XMLReader;
+
+class RestConsole
+{
+    private string $baseUrl;
+    private ?string $sessionId;
+
+    public function __construct(string $host, int $port)
+    {
+        $this->baseUrl = "http://".$host.':'.$port;
+    }
+
+    public function startSession(string $username, string $password): bool
+    {
+        $response = $this->sendRequest('/StartSession/', [
+            'USER' => $username,
+            'PASS' => $password
+        ]);
+
+        if ($this->detectError($response, '/StartSession/')) {
+            return false;
+        }
+
+        $this->sessionId = $response['SessionID'];
+        $this->readResponses();
+        return true;
+    }
+
+    public function readResponses(): array
+    {
+        if ($this->sessionId == null) {
+            return array();
+        }
+
+        $response = $this->sendRequest('/ReadResponses/'.$this->sessionId);
+        if ($this->detectError($response, '/ReadResponses/')) {
+            return array();
+        }
+
+        return $response['Line'];
+    }
+
+    public function sendCommand(string $command): bool
+    {
+        $response = $this->sendRequest('/SessionCommand/', [
+            'ID' => $this->sessionId,
+            'COMMAND' => $command
+        ]);
+
+        if ($this->detectError($response, '/SessionCommand/')) {
+            return false;
+        }
+
+        return $response['Result'] == 'OK';
+    }
+
+    private function detectError(array|int $response, string $request): bool
+    {
+        if (gettype($response) == 'integer') {
+            error_log('OS RestConsole request '.$this->baseUrl.$request.' failed, status: '.$response);
+            return true;
+        }
+
+        return false;
+    }
+
+    private function sendRequest(string $request, array $data = array()): array|int
+    {
+        $curl = curl_init($this->baseUrl.$request);
+        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
+        curl_setopt($curl, CURLOPT_POST, true);
+        curl_setopt($curl, CURLOPT_USERAGENT, 'mcp-restconsole/0.0.1');
+        curl_setopt($curl, CURLOPT_HTTPHEADER, [
+            'Accept' => 'text/xml'
+        ]);
+
+        $postData = '';
+        foreach ($data as $key => $val) {
+            $postData = $postData.(strlen($postData) > 0 ? '&' : '').$key.'='.$val;
+        }
+        curl_setopt($curl, CURLOPT_POSTFIELDS, $postData);
+
+        $res = curl_exec($curl);
+        $status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
+        if ($status != 200) {
+            return $status;
+        }
+
+
+        return $this->parseXml($res);
+    }
+
+    private function parseXml(string $response): array
+    {
+        $xmlReader = XMLReader::XML($response, "UTF-8");
+        $res = array();
+        if ($xmlReader->next()) {
+            $consoleSession = $xmlReader->expand();
+            if ($consoleSession->nodeName == 'ConsoleSession') {
+                foreach ($consoleSession->childNodes as $childNode) {
+                    $name = $childNode->nodeName;
+                    if (isset($res[$name])) {
+                        if (gettype($res[$name]) == 'string') {
+                            $res[$name] = array($res[$name], $childNode->nodeValue);
+                        }
+                        else {
+                            $res[$name][] = $childNode->nodeValue;
+                        }
+                    }
+                    else {
+                        $res[$name] = $childNode->nodeValue;
+                    }
+                }
+            }
+        }
+
+        return $res;
+    }
+}