From d1347ba8208a449c5aa0bf13cd7b65298c59257e Mon Sep 17 00:00:00 2001
From: William DURAND <william.durand1@gmail.com>
Date: Wed, 26 Feb 2014 14:55:43 +0100
Subject: [PATCH] Backport fix incorrect behavior with priorities

See #24
---
 src/Negotiation/FormatNegotiator.php          | 21 +++++++++-
 .../Tests/FormatNegotiatorTest.php            | 39 ++++++++++++++++++-
 2 files changed, 57 insertions(+), 3 deletions(-)

diff --git a/src/Negotiation/FormatNegotiator.php b/src/Negotiation/FormatNegotiator.php
index 00e4d75..622ba31 100644
--- a/src/Negotiation/FormatNegotiator.php
+++ b/src/Negotiation/FormatNegotiator.php
@@ -28,10 +28,15 @@ public function getBest($header, array $priorities = array())
         $acceptHeaders   = $this->parseHeader($header);
         $priorities      = $this->sanitize($priorities);
         $catchAllEnabled = $this->isCatchAllEnabled($priorities);
+        $catchAllHeader  = null;
 
         foreach ($acceptHeaders as $accept) {
             $mimeType = $accept->getValue();
 
+            if (self::CATCH_ALL_VALUE === $mimeType) {
+                $catchAllHeader = $accept;
+            }
+
             if ('/*' !== substr($mimeType, -2)) {
                 if (in_array($mimeType, $priorities)) {
                     return $accept;
@@ -68,7 +73,21 @@ public function getBest($header, array $priorities = array())
             }
         }
 
-        // If $priorities is empty or contains a catch-all mime type
+        // if client sends `*/*` in Accept header, and nothing has been negotiated before
+        // then, return the first priority value if available
+        if (null !== $catchAllHeader) {
+            $value = array_shift($priorities);
+
+            if (null !== $value && self::CATCH_ALL_VALUE !== $value) {
+                return new AcceptHeader(
+                    $value,
+                    $catchAllHeader->getQuality(),
+                    $this->parseParameters($catchAllHeader->getValue())
+                );
+            }
+        }
+
+        // if `$priorities` is empty or contains a catch-all mime type
         if ($catchAllEnabled) {
             return array_shift($acceptHeaders) ?: null;
         }
diff --git a/tests/Negotiation/Tests/FormatNegotiatorTest.php b/tests/Negotiation/Tests/FormatNegotiatorTest.php
index ad62a0a..5cd2502 100644
--- a/tests/Negotiation/Tests/FormatNegotiatorTest.php
+++ b/tests/Negotiation/Tests/FormatNegotiatorTest.php
@@ -144,7 +144,7 @@ public static function dataProviderForGetBest()
                     'application/rss+xml',
                     '*/*',
                 ),
-                'text/html'
+                'application/rss+xml'
             ),
             // See: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
             array(
@@ -252,6 +252,41 @@ public static function dataProviderForGetBest()
                 ),
                 null
             ),
+            array(
+                'text/rdf+n3; q=0.8, application/rdf+json; q=0.8, text/turtle; q=1.0, text/n3; q=0.8, application/ld+json; q=0.5, application/rdf+xml; q=0.8',
+                array(),
+                'text/turtle'
+            ),
+            array(
+                'application/rdf+xml;q=0.5,text/html;q=.3',
+                array(),
+                'application/rdf+xml'
+            ),
+            array(
+                'application/xhtml+xml;q=0.5',
+                array(),
+                'application/xhtml+xml'
+            ),
+            array(
+                'application/rdf+xml;q=0.5,text/html;q=.5',
+                array(),
+                'application/rdf+xml'
+            ),
+            array(
+                'text/plain; q=0.5, text/html, text/x-dvi; q=0.8, text/x-c',
+                array(),
+                'text/html',
+            ),
+            // IE8 Accept header
+            array(
+                'image/jpeg, application/x-ms-application, image/gif, application/xaml+xml, image/pjpeg, application/x-ms-xbap, */*',
+                array(
+                    'text/html',
+                    'application/xhtml+xml',
+                    '*/*'
+                ),
+                'text/html',
+            ),
         );
     }
 
@@ -262,7 +297,7 @@ public static function dataProviderForGetBestFormat()
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array(), 'html'),
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('html', 'json', '*/*'), 'html'),
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('html', 'json', '*/*'), 'html'),
-            array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('rss', '*/*'), 'html'),
+            array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('rss', '*/*'), 'rss'),
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('xml'), 'xml'),
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('json', 'xml'), 'xml'),
             array('text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', array('json'), 'json'),