From ac23a896e628513279d20ce68703a82d06c54376 Mon Sep 17 00:00:00 2001
From: Luke Carrier <luke@carrier.im>
Date: Fri, 15 Jun 2018 01:28:30 +0100
Subject: [PATCH] client: initial commit

---
 README.md          |  25 +++++++++++
 classes/client.php | 106 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 131 insertions(+)
 create mode 100644 classes/client.php

diff --git a/README.md b/README.md
index 6f97fb0..7ab13b2 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,28 @@ A Moodle webservice protocol implementation that allows requests with bodies. It
 1. Ensure _Enable web services_ is enabled under _Site administration_ > _Advanced features_.
 2. Navigate to _Site administration_ > _Plugins_ > _Web services_ > _Manage protocols_ and enable _Loaded REST protocol_.
 3. Assign the _Use Loaded REST protocol_ capability to the desired roles under _Site administration_ > _Users_ > _Permissions_ > _Define roles_.
+
+## Sample client usage
+
+```php
+use webservice_loadedrest\client;
+
+$serverurl = '/webservice/loadedrest/server.php';
+$token = '000000000000000000000000000000000000';
+$httpmethod = 'PUT';
+$wsfunction = 'component_function';
+$params = [
+    'myargs' => [
+        [
+            'param' => 'look, nesting!',
+        ],
+    ],
+];
+
+$client = new client($serverurl, $token);
+try {
+    var_dump($client->call($httpmethod, $wsfunction, $params));
+} catch (Exception $e) {
+    var_dump($e);
+}
+```
diff --git a/classes/client.php b/classes/client.php
new file mode 100644
index 0000000..9328758
--- /dev/null
+++ b/classes/client.php
@@ -0,0 +1,106 @@
+<?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Loaded REST.
+ *
+ * @package webservice_loadedrest
+ * @author Luke Carrier <luke@carrier.im>
+ * @copyright 2018 Luke Carrier
+ */
+
+namespace webservice_loadedrest;
+
+use moodle_exception;
+use moodle_url;
+use webservice_loadedrest\format\format_factory;
+
+defined('MOODLE_INTERNAL') || die;
+
+/**
+ * Test webservice client.
+ */
+class client {
+    /**
+     * Path to server.php, relative to wwwroot.
+     *
+     * @var string
+     */
+    protected $serverurl;
+
+    /**
+     * Authentication token.
+     *
+     * @var string
+     */
+    protected $token;
+
+    /**
+     * I/O format.
+     *
+     * @var string|null
+     */
+    protected $formatname;
+
+    /**
+     * Initialiser.
+     *
+     * @param string $baseurl
+     * @param string $token
+     * @param string|null $format
+     */
+    public function __construct($baseurl, $token, $format=null) {
+        $this->serverurl = $baseurl;
+        $this->token = $token;
+        $this->formatname = $format ?? format_factory::FORMAT_DEFAULT;
+    }
+
+    /**
+     * Call an external function.
+     *
+     * @param $httpmethod
+     * @param $wsfunction
+     * @param $bodyparams
+     *
+     * @return mixed
+     *
+     * @throws moodle_exception
+     */
+    public function call($httpmethod, $wsfunction, $bodyparams) {
+        $format = format_factory::create($this->formatname);
+
+        $getparams = [
+            'wstoken'    => $this->token,
+            'wsfunction' => $wsfunction,
+        ];
+        $url = new moodle_url($this->serverurl, $getparams);
+        $headers = [
+            'Content-Type' => $this->formatname,
+        ];
+        $body = $format->serialise($bodyparams);
+
+        $curl = curl_init($url->out(false));
+        curl_setopt_array($curl, [
+            CURLOPT_CUSTOMREQUEST  => $httpmethod,
+            CURLOPT_HTTPHEADER     => $headers,
+            CURLOPT_POSTFIELDS     => $body,
+            CURLOPT_RETURNTRANSFER => true,
+        ]);
+        $result = curl_exec($curl);
+
+        return $format->deserialise($result);
+    }
+}