From 584e0016f2d27ea8d40e96bf9a312ad0518bd503 Mon Sep 17 00:00:00 2001
From: Antonio Ospite <ao2@ao2.it>
Date: Mon, 16 May 2016 13:10:28 +0200
Subject: [PATCH 1/1] tweeper.php: make json_to_xml() do strictly what its name
 says

Extracting the json data from the HTML does not really belong to the
json_to_xml() function.
---
 tweeper.php | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/tweeper.php b/tweeper.php
index bed6350..0034a0d 100644
--- a/tweeper.php
+++ b/tweeper.php
@@ -182,18 +182,11 @@ class Tweeper {
     return $xsltProcessor;
   }
 
-  private function json_to_xml($html, $json_match_expr, $rootName) {
-    // pre-process, convert json to XML
-    $ret = preg_match($json_match_expr, $html, $matches);
-    if ($ret !== 1) {
-      trigger_error("Cannot match expression: $json_match_expr\n", E_USER_ERROR);
-      return NULL;
-    }
-
+  private function json_to_xml($json, $rootName) {
     // Apparenty the ObjectNormalizer used afterwards is not able to handle
     // the stdClass object created by json_decode() with the default setting
     // $assoc = false; so use $assoc = true 
-    $data = json_decode($matches[1], $assoc = true);
+    $data = json_decode($json, $assoc = true);
     if (!$data) {
       return NULL;
     }
@@ -218,7 +211,15 @@ class Tweeper {
   }
 
   private function get_xml_instagram_com($html) {
-    return $this->json_to_xml($html, '/window._sharedData = (.*);/', 'instagram');
+    // extract the json data from the html code
+    $json_match_expr = '/window._sharedData = (.*);/';
+    $ret = preg_match($json_match_expr, $html, $matches);
+    if ($ret !== 1) {
+      trigger_error("Cannot match expression: $json_match_expr\n", E_USER_ERROR);
+      return NULL;
+    }
+
+    return $this->json_to_xml($matches[1], 'instagram');
   }
 
   private function preprocess_html_facebook_com($html) {
-- 
2.1.4