Initial commit

lib/PayPal/Rest/ApiContext.php

@@ -0,0 +1,74 @@
+<?php
+namespace PayPal\Rest;
+
+/**
+ * 
+ * Call level parameters such as
+ * request id, credentials etc
+ */
+class ApiContext {
+	
+	/**
+	 * OAuth Credentials to use for this call
+	 * @var PayPal/Api/OAuthTokenCredential
+	 */
+	private $credential;
+	
+	/**
+	 * Unique request id to be used for this call
+	 * The user can either generate one as per application
+	 * needs or let the SDK generate one
+	 * @var string
+	 */
+	private $requestId;
+	
+	
+	/**
+	 * 
+	 */
+	public function getCredential() {
+		return $this->credential;		
+	}
+	
+	public function getrequestId() {
+		if($this->requestId == null) {
+			$this->requestId = $this->generaterequestId();
+		}
+		return $this->requestId;
+	}
+	
+	/**
+	 * 
+	 * @param PayPal/Api/OAuthTokenCredential $credential
+	 * @param string $requestId
+	 */
+	public function __construct($credential, $requestId=null) {
+		$this->credential = $credential;
+		$this->requestId = $requestId;
+	}
+	
+	/**
+	 * Generates a unique per request id that
+	 * can be used to set the PayPal-Request-Id header
+	 * that is used for idemptency
+	 * @return string
+	 */
+	private function generateRequestId() {
+		
+		static $pid = -1;
+		static $addr = -1;
+		
+		if ($pid == -1) {
+			$pid = getmypid();
+		}
+		if ($addr == -1) {
+			if(array_key_exists('SERVER_ADDR', $_SERVER)) {
+				$addr = ip2long($_SERVER['SERVER_ADDR']);
+			} else {
+				$addr  = php_uname('n');
+			}
+		}
+		
+		return $addr . $pid . $_SERVER['REQUEST_TIME'] . mt_rand(0, 0xffff);
+	}
+}