Supporting the region bases data fetch

Author: rohitmishra209

src/lib/models/contentstackregion.php

@@ -0,0 +1,9 @@
+<?php
+/*
+ * Constants for the SDK
+ * */
+namespace Contentstack\Contentstackregion;
+
+// Domain relevant constants
+define('Europe', 'eu');
+define('US', 'us');

src/lib/models/stack.php

@@ -9,6 +9,7 @@
 require_once __DIR__."/assets.php";
 //require_once __DIR__."/asset.php";
 require_once __DIR__."/../../config/index.php";
+require_once __DIR__."/contentstackregion.php";
 
 /*
  * Stack Class to initialize the provided parameter Stack
@@ -28,8 +29,13 @@ class Stack {
     /*
      * Constructor of the Stack
      * */
-    public function __construct($api_key = '', $access_token = '', $environment = '') {
-        $this->header = Utility\validateInput('stack', array('api_key' => $api_key, 'access_token' => $access_token, 'environment' => $environment));
+    public function __construct($api_key = '', $access_token = '', $environment = '', $region = '') {
+       
+    
+        if($region && $region =="Europe") {
+            $this->host = Europe.'-'.HOST ;
+        }
+        $this->header = Utility\validateInput('stack', array('api_key' => $api_key, 'access_token' => $access_token, 'environment' => $environment, 'region' => $region));
         $this->environment = $this->header['environment'];
         unset($this->header['environment']);
         return $this;

src/lib/utility.php

@@ -22,9 +22,16 @@ function validateInput($type = '', $input = array()) {
         try {
             switch ($type) {
                 case 'stack' :
+                if($input['region']) {
+                    if(!(isKeySet($input,'api_key') && isKeySet($input, 'access_token') && isKeySet($input, 'environment') && isKeySet($input, 'region')))
+                    $msg = 'Please provide valid api_key, access_token, environment and region';
+                break;
+                } else {
                     if(!(isKeySet($input,'api_key') && isKeySet($input, 'access_token') && isKeySet($input, 'environment')))
                         $msg = 'Please provide valid api_key, access_token and environment';
                     break;
+                }
+
                 case 'port' :
                     if(isEmpty($input) || !is_numeric($input))
                         $msg = 'Please provide valid string for '.$type;