Add more specialized negotiators

Fix issue with accept language setting

spec/charset_negotiator_spec.cr

@@ -0,0 +1,67 @@
+require "./spec_helper"
+
+struct CharsetNegotiatorTest < NegotiatorTestCase
+  @negotiator : ANG::CharsetNegotiator
+
+  def initialize
+    @negotiator = ANG::CharsetNegotiator.new
+  end
+
+  def test_best_unmatched_header : Nil
+    @negotiator.best("foo, bar, yo", {"baz"}).should be_nil
+  end
+
+  def test_best_ignores_missing_content : Nil
+    accept = @negotiator.best "en; q=0.1, fr; q=0.4, bu; q=1.0", {"en", "fr"}
+
+    accept = accept.should_not be_nil
+    accept.should be_a ANG::AcceptCharset
+    accept.value.should eq "fr"
+  end
+
+  def test_best_respects_priorities : Nil
+    accept = @negotiator.best "foo, bar, yo", {"yo"}
+    accept = accept.should_not be_nil
+    accept.should be_a ANG::AcceptCharset
+    accept.type.should eq "yo"
+  end
+
+  def test_best_respects_quality : Nil
+    accept = @negotiator.best "utf-8;q=0.5,iso-8859-1", {"iso-8859-1;q=0.3", "utf-8;q=0.9", "utf-16;q=1.0"}
+    accept = accept.should_not be_nil
+    accept.should be_a ANG::AcceptCharset
+    accept.type.should eq "utf-8"
+  end
+
+  @[DataProvider("best_data_provider")]
+  def test_best(header : String, priorities : Indexable(String), expected : String?) : Nil
+    accept = @negotiator.best header, priorities
+
+    if accept.nil?
+      expected.should be_nil
+    else
+      accept.should be_a ANG::AcceptCharset
+      accept.value.should eq expected
+    end
+  end
+
+  def best_data_provider : Tuple
+    php_pear_charset = "ISO-8859-1, Big5;q=0.6,utf-8;q=0.7, *;q=0.5"
+    php_pear_charset2 = "ISO-8859-1, Big5;q=0.6,utf-8;q=0.7"
+
+    {
+      {php_pear_charset, {"utf-8", "big5", "iso-8859-1", "shift-jis"}, "iso-8859-1"},
+      {php_pear_charset, {"utf-8", "big5", "shift-jis"}, "utf-8"},
+      {php_pear_charset, {"Big5", "shift-jis"}, "Big5"},
+      {php_pear_charset, {"shift-jis"}, "shift-jis"},
+      {php_pear_charset2, {"utf-8", "big5", "iso-8859-1", "shift-jis"}, "iso-8859-1"},
+      {php_pear_charset2, {"utf-8", "big5", "shift-jis"}, "utf-8"},
+      {php_pear_charset2, {"Big5", "shift-jis"}, "Big5"},
+      {"utf-8;q=0.6,iso-8859-5;q=0.9", {"iso-8859-5", "utf-8"}, "iso-8859-5"},
+      {"en, *;q=0.9", {"fr"}, "fr"},
+      # Quality of source factors
+      {php_pear_charset, {"iso-8859-1;q=0.5", "utf-8", "utf-16;q=1.0"}, "utf-8"},
+      {php_pear_charset, {"iso-8859-1;q=0.8", "utf-8", "utf-16;q=1.0"}, "iso-8859-1;q=0.8"},
+    }
+  end
+end

spec/encoding_negotiator_spec.cr

@@ -0,0 +1,42 @@
+require "./spec_helper"
+
+struct EncodingNegotiatorTest < NegotiatorTestCase
+  @negotiator : ANG::EncodingNegotiator
+
+  def initialize
+    @negotiator = ANG::EncodingNegotiator.new
+  end
+
+  def test_best_unmatched_header : Nil
+    @negotiator.best("foo, bar, yo", {"baz"}).should be_nil
+  end
+
+  def test_best_respects_quality : Nil
+    accept = @negotiator.best "gzip;q=0.7,identity", {"identity;q=0.5", "gzip;q=0.9"}
+    accept = accept.should_not be_nil
+    accept.should be_a ANG::AcceptEncoding
+    accept.type.should eq "gzip"
+  end
+
+  @[DataProvider("best_data_provider")]
+  def test_best(header : String, priorities : Indexable(String), expected : String?) : Nil
+    accept = @negotiator.best header, priorities
+
+    if accept.nil?
+      expected.should be_nil
+    else
+      accept.should be_a ANG::AcceptEncoding
+      accept.value.should eq expected
+    end
+  end
+
+  def best_data_provider : Tuple
+    {
+      {"gzip;q=1.0, identity; q=0.5, *;q=0", {"identity"}, "identity"},
+      {"gzip;q=0.5, identity; q=0.5, *;q=0.7", {"bzip", "foo"}, "bzip"},
+      {"gzip;q=0.7, identity; q=0.5, *;q=0.7", {"gzip", "foo"}, "gzip"},
+      # Quality of source factors
+      {"gzip;q=0.7,identity", {"identity;q=0.5", "gzip;q=0.9"}, "gzip;q=0.9"},
+    }
+  end
+end

spec/language_negotiator_spec.cr

@@ -0,0 +1,43 @@
+require "./spec_helper"
+
+struct LanguageNegotiatorTest < NegotiatorTestCase
+  @negotiator : ANG::LanguageNegotiator
+
+  def initialize
+    @negotiator = ANG::LanguageNegotiator.new
+  end
+
+  def test_best_respects_quality : Nil
+    accept = @negotiator.best "en;q=0.5,de", {"de;q=0.3", "en;q=0.9"}
+    accept = accept.should_not be_nil
+    accept.should be_a ANG::AcceptLanguage
+    accept.type.should eq "en"
+  end
+
+  @[DataProvider("best_data_provider")]
+  def test_best(header : String, priorities : Indexable(String), expected : String?) : Nil
+    accept = @negotiator.best header, priorities
+
+    if accept.nil?
+      expected.should be_nil
+    else
+      accept.should be_a ANG::AcceptLanguage
+      accept.value.should eq expected
+    end
+  end
+
+  def best_data_provider : Tuple
+    {
+      {"en, de", {"fr"}, nil},
+      {"foo, bar, yo", {"baz", "biz"}, nil},
+      {"fr-FR, en;q=0.8", {"en-US", "de-DE"}, "en-US"},
+      {"en, *;q=0.9", {"fr"}, "fr"},
+      {"foo, bar, yo", {"yo"}, "yo"},
+      {"en; q=0.1, fr; q=0.4, bu; q=1.0", {"en", "fr"}, "fr"},
+      {"en; q=0.1, fr; q=0.4, fu; q=0.9, de; q=0.2", {"en", "fu"}, "fu"},
+      {"fr, zh-Hans-CN;q=0.3", {"fr"}, "fr"},
+      # Quality of source factors
+      {"en;q=0.5,de", {"de;q=0.3", "en;q=0.9"}, "en;q=0.9"},
+    }
+  end
+end

spec/negotiator_spec.cr

@@ -1,6 +1,6 @@
 require "./spec_helper"
 
-struct NegotiatorTest < ASPEC::TestCase
+struct NegotiatorTest < NegotiatorTestCase
   @negotiator : ANG::Negotiator
 
   def initialize
@@ -18,20 +18,12 @@ struct NegotiatorTest < ASPEC::TestCase
     @negotiator.best("/qwer", {"foo/bar"}, false).should be_nil
   end
 
-  def test_best_exception_handling : Nil
+  def test_invalid_media_type : Nil
     ex = expect_raises ANG::Exceptions::InvalidMediaType, "Invalid media type: '/qwer'." do
       @negotiator.best "foo/bar", {"/qwer"}
     end
 
     ex.type.should eq "/qwer"
-
-    expect_raises ArgumentError, "priorities should not be empty." do
-      @negotiator.best "foo/bar", [] of String
-    end
-
-    expect_raises ArgumentError, "The header string should not be empty." do
-      @negotiator.best "", {"text/html"}
-    end
   end
 
   @[DataProvider("best_data_provider")]

spec/negotiator_test_case.cr

@@ -0,0 +1,11 @@
+abstract struct NegotiatorTestCase < ASPEC::TestCase
+  def test_best_exception_handling : Nil
+    expect_raises ArgumentError, "priorities should not be empty." do
+      @negotiator.best "foo/bar", [] of String
+    end
+
+    expect_raises ArgumentError, "The header string should not be empty." do
+      @negotiator.best "", {"text/html"}
+    end
+  end
+end

spec/spec_helper.cr

@@ -1,6 +1,7 @@
 require "spec"
 require "athena-spec"
 require "../src/athena-negotiation"
+require "./negotiator_test_case"
 
 include ASPEC::Methods
 

src/accept_language.cr

@@ -8,7 +8,7 @@ struct Athena::Negotiation::AcceptLanguage < Athena::Negotiation::BaseAccept
   def initialize(value : String)
     super value
 
-    parts = @value.split '-'
+    parts = @type.split '-'
 
     case parts.size
     when 2

src/athena-negotiation.cr

@@ -3,6 +3,9 @@ require "./accept_match"
 require "./accept_charset"
 require "./accept_encoding"
 require "./accept_language"
+require "./charset_negotiator"
+require "./encoding_negotiator"
+require "./language_negotiator"
 require "./negotiator"
 
 require "./exceptions/*"

src/charset_negotiator.cr

@@ -0,0 +1,7 @@
+require "./abstract_negotiator"
+
+class Athena::Negotiation::CharsetNegotiator < Athena::Negotiation::AbstractNegotiator
+  private def create_header(header : String) : ANG::BaseAccept
+    ANG::AcceptCharset.new header
+  end
+end

src/encoding_negotiator.cr

@@ -0,0 +1,7 @@
+require "./abstract_negotiator"
+
+class Athena::Negotiation::EncodingNegotiator < Athena::Negotiation::AbstractNegotiator
+  private def create_header(header : String) : ANG::BaseAccept
+    ANG::AcceptEncoding.new header
+  end
+end

src/language_negotiator.cr

@@ -0,0 +1,26 @@
+require "./abstract_negotiator"
+
+class Athena::Negotiation::LanguageNegotiator < Athena::Negotiation::AbstractNegotiator
+  protected def match(accept : ANG::AcceptLanguage, priority : ANG::AcceptLanguage, index : Int32) : ANG::AcceptMatch?
+    accept_base = accept.language
+    priority_base = priority.language
+
+    accept_sub = accept.region
+    priority_sub = priority.region
+
+    base_equal = accept_base.downcase == priority_base.downcase
+    sub_equal = accept_sub.try &.downcase == priority_sub.try &.downcase
+
+    if ((accept_base == "*" || base_equal) && (accept_sub.nil? || sub_equal))
+      score = 10 * (base_equal ? 1 : 0) + (sub_equal ? 1 : 0)
+
+      return ANG::AcceptMatch.new accept.quality * priority.quality, score, index
+    end
+
+    nil
+  end
+
+  private def create_header(header : String) : ANG::BaseAccept
+    ANG::AcceptLanguage.new header
+  end
+end

src/negotiator.cr

@@ -1,9 +1,7 @@
 require "./abstract_negotiator"
 
 class Athena::Negotiation::Negotiator < Athena::Negotiation::AbstractNegotiator
-  protected def match(accept : ANG::BaseAccept, priority : ANG::BaseAccept, index : Int32) : ANG::AcceptMatch?
-    return nil if !accept.is_a?(ANG::Accept) || !priority.is_a?(ANG::Accept)
-
+  protected def match(accept : ANG::Accept, priority : ANG::Accept, index : Int32) : ANG::AcceptMatch?
     accept_base = accept.base_part
     priority_base = priority.base_part