First Commit

payp/lib/PayPalClient.php

@@ -0,0 +1,92 @@
+<?php
+
+class PayPalClient
+{
+    private string $clientId;
+    private string $clientSecret;
+    private string $env; // sandbox|live
+    private string $baseApi;
+
+    public function __construct(array $config)
+    {
+        $this->clientId = $config['client_id'] ?? '';
+        $this->clientSecret = $config['client_secret'] ?? '';
+        $this->env = $config['env'] ?? 'sandbox';
+        $this->baseApi = $this->env === 'live'
+            ? 'https://api-m.paypal.com'
+            : 'https://api-m.sandbox.paypal.com';
+
+        if (!$this->clientId || !$this->clientSecret) {
+            throw new RuntimeException('Missing PayPal client_id/client_secret in config.php');
+        }
+    }
+
+    public function getAccessToken(): string
+    {
+        $url = $this->baseApi . '/v1/oauth2/token';
+        $headers = [
+            'Accept: application/json',
+            'Accept-Language: en_US',
+        ];
+        $body = 'grant_type=client_credentials';
+
+        $ch = curl_init($url);
+        curl_setopt_array($ch, [
+            CURLOPT_HTTPHEADER => $headers,
+            CURLOPT_POST => true,
+            CURLOPT_POSTFIELDS => $body,
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_USERPWD => $this->clientId . ':' . $this->clientSecret,
+        ]);
+        $resp = curl_exec($ch);
+        if ($resp === false) {
+            throw new RuntimeException('OAuth token request failed: ' . curl_error($ch));
+        }
+        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+        $data = json_decode($resp, true);
+        if ($code < 200 || $code >= 300 || !isset($data['access_token'])) {
+            throw new RuntimeException('OAuth token response error (' . $code . '): ' . $resp);
+        }
+        return $data['access_token'];
+    }
+
+    public function api(string $method, string $path, array $payload = null, array $headers = []): array
+    {
+        $url = $this->baseApi . $path;
+        $accessToken = $this->getAccessToken();
+        $defaultHeaders = [
+            'Content-Type: application/json',
+            'Authorization: Bearer ' . $accessToken,
+        ];
+        $allHeaders = array_merge($defaultHeaders, $headers);
+
+        $ch = curl_init($url);
+        $opts = [
+            CURLOPT_HTTPHEADER => $allHeaders,
+            CURLOPT_RETURNTRANSFER => true,
+            CURLOPT_CUSTOMREQUEST => strtoupper($method),
+        ];
+        if ($payload !== null) {
+            $opts[CURLOPT_POSTFIELDS] = json_encode($payload);
+        }
+        curl_setopt_array($ch, $opts);
+        $resp = curl_exec($ch);
+        if ($resp === false) {
+            throw new RuntimeException('API request failed: ' . curl_error($ch));
+        }
+        $code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+        curl_close($ch);
+        $data = json_decode($resp, true);
+        if ($data === null && $resp !== '' && $resp !== 'null') {
+            // not JSON but body present
+            $data = ['raw' => $resp];
+        }
+        return ['status' => $code, 'body' => $data];
+    }
+
+    public function getBaseApi(): string
+    {
+        return $this->baseApi;
+    }
+}