Merge branch 'experimental' of git://github.com/jamesmacaulay/liquid into jamesmacaulay/experimental

Conflicts:

	lib/liquid.rb
	lib/liquid/variable.rb

lib/liquid.rb

@@ -33,7 +33,12 @@ module Liquid
   VariableStart               = /\{\{/
   VariableEnd                 = /\}\}/
   VariableIncompleteEnd       = /\}\}?/
-  QuotedFragment              = /"[^"]+"|'[^']+'|[^\s,|]+/
+  QuotedFragment              = /"[^"]+"|'[^']+'|[^\s,\|]+/
+  StrictQuotedFragment        = /"[^"]+"|'[^']+'|[^\s,\|,\:,\,]+/
+  FirstFilterArgument         = /#{FilterArgumentSeparator}(?:#{StrictQuotedFragment})/
+  OtherFilterArgument         = /#{ArgumentSeparator}(?:#{StrictQuotedFragment})/
+  SpacelessFilter             = /#{FilterSeparator}(?:#{StrictQuotedFragment})(?:#{FirstFilterArgument}(?:#{OtherFilterArgument})*)?/
+  Expression                  = /(?:#{QuotedFragment}(?:#{SpacelessFilter})*)/
   TagAttributes               = /(\w+)\s*\:\s*(#{QuotedFragment})/
   AnyStartingTag              = /\{\{|\{\%/
   PartialTemplateParser       = /#{TagStart}.*?#{TagEnd}|#{VariableStart}.*?#{VariableIncompleteEnd}/

lib/liquid/context.rb

@@ -133,6 +133,9 @@ module Liquid
         :blank?
       when 'empty'
         :empty?
+      # filtered variables
+      when SpacelessFilter
+        filtered_variable(key)
       # Single quoted strings
       when /^'(.*)'$/
         $1.to_s
@@ -221,5 +224,9 @@ module Liquid
 
       object
     end
+    
+    def filtered_variable(markup)
+      Variable.new(markup).render(self)
+    end
   end
 end

lib/liquid/standardfilters.rb

@@ -63,8 +63,26 @@ module Liquid
     end
 
     # Sort elements of the array
-    def sort(input)
+    # provide optional property with which to sort an array of hashes or drops
-      [input].flatten.sort
+    def sort(input, property = nil)
+      ary = [input].flatten
+      if property.nil?
+        ary.sort
+      elsif ary.first.respond_to?('[]') and !ary.first[property].nil?
+        ary.sort {|a,b| a[property] <=> b[property] }
+      elsif ary.first.respond_to?(property)
+        ary.sort {|a,b| a.send(property) <=> b.send(property) }
+      end
+    end               
+    
+    # map/collect on a given property
+    def map(input, property)
+      ary = [input].flatten
+      if ary.first.respond_to?('[]') and !ary.first[property].nil?
+        ary.map {|e| e[property] }
+      elsif ary.first.respond_to?(property)
+        ary.map {|e| e.send(property) }
+      end
     end
             
     # Replace occurrences of a string with another
@@ -155,6 +173,26 @@ module Liquid
       array.last if array.respond_to?(:last)
     end
     
+    # addition
+    def plus(input, operand)
+      input + operand if input.respond_to?('+')
+    end
+    
+    # subtraction
+    def minus(input, operand)
+      input - operand if input.respond_to?('-')
+    end
+    
+    # multiplication
+    def times(input, operand)
+      input * operand if input.respond_to?('*')
+    end
+    
+    # division
+    def divided_by(input, operand)
+      input / operand if input.respond_to?('/')
+    end
+    
   end
    
   Template.register_filter(StandardFilters)

lib/liquid/tags/assign.rb

@@ -9,7 +9,7 @@ module Liquid
   #  {{ monkey }}
   #
   class Assign < Tag
-    Syntax = /(#{VariableSignature}+)\s*=\s*(#{QuotedFragment}+)/   
+    Syntax = /(#{VariableSignature}+)\s*=\s*(#{Expression}+)/   
   
     def initialize(tag_name, markup, tokens)          
       if markup =~ Syntax

lib/liquid/tags/case.rb

@@ -1,7 +1,7 @@
 module Liquid
   class Case < Block
-    Syntax     = /(#{QuotedFragment})/
+    Syntax     = /(#{Expression})/
-    WhenSyntax = /(#{QuotedFragment})(?:(?:\s+or\s+|\s*\,\s*)(#{QuotedFragment}.*))?/
+    WhenSyntax = /(#{Expression})(?:(?:\s+or\s+|\s*\,\s*)(#{Expression}.*))?/
 
     def initialize(tag_name, markup, tokens)      
       @blocks = []

lib/liquid/tags/cycle.rb

@@ -13,8 +13,8 @@ module Liquid
   #    <div class="green"> Item five</div>
   #
   class Cycle < Tag
-    SimpleSyntax = /#{QuotedFragment}/        
+    SimpleSyntax = /#{Expression}/        
-    NamedSyntax = /(#{QuotedFragment})\s*\:\s*(.*)/
+    NamedSyntax = /(#{Expression})\s*\:\s*(.*)/
   
     def initialize(tag_name, markup, tokens)      
       case markup
@@ -49,7 +49,7 @@ module Liquid
   
     def variables_from_string(markup)
       markup.split(',').collect do |var|
-    	  var =~ /\s*(#{QuotedFragment})\s*/
+    	  var =~ /\s*(#{Expression})\s*/
     	  $1 ? $1 : nil
     	end.compact
     end

lib/liquid/tags/for.rb

@@ -42,7 +42,7 @@ module Liquid
   # forloop.last:: Returns true if the item is the last item.
   #
   class For < Block                                             
-    Syntax = /(\w+)\s+in\s+(#{VariableSignature}+)\s*(reversed)?/   
+    Syntax = /(\w+)\s+in\s+(#{Expression}+)\s*(reversed)?/   
   
     def initialize(tag_name, markup, tokens)
       if markup =~ Syntax

lib/liquid/tags/if.rb

@@ -13,7 +13,7 @@ module Liquid
   #
   class If < Block
     SyntaxHelp = "Syntax Error in tag 'if' - Valid syntax: if [expression]"
-    Syntax = /(#{QuotedFragment})\s*([=!<>a-z_]+)?\s*(#{QuotedFragment})?/
+    Syntax = /(#{Expression})\s*([=!<>a-z_]+)?\s*(#{Expression})?/
     
     def initialize(tag_name, markup, tokens)    
     

lib/liquid/variable.rb

@@ -21,7 +21,6 @@ module Liquid
         @name = match[1]
         if markup.match(/#{FilterSeparator}\s*(.*)/)
           filters = Regexp.last_match(1).split(/#{FilterSeparator}/)
-
           filters.each do |f|    
             if matches = f.match(/\s*(\w+)/)
               filtername = matches[1]

test/assign_test.rb

@@ -0,0 +1,11 @@
+require File.dirname(__FILE__) + '/helper'
+
+class IfElseTest < Test::Unit::TestCase
+  include Liquid
+  
+  def test_with_filtered_expressions
+    assert_template_result('foo','{% assign foo = values|sort|last %}{{ foo }}', 'values' => %w{foo bar baz})
+    assert_template_result('foo','{% assign sorted = values|sort %}{{ sorted | last }}', 'values' => %w{foo bar baz})
+  end
+
+end

test/if_else_test.rb

@@ -112,6 +112,25 @@ class IfElseTest < Test::Unit::TestCase
     assert_template_result('elsif','{% if false %}if{% elsif true %}elsif{% endif %}')    
   end
   
+  def test_with_filtered_expressions
+    assert_template_result('yes','{% if "BLAH"|downcase == "blah" %}yes{% endif %}')
+    assert_template_result('yes','{% if "FOO BAR"|truncatewords:1,"--" == "FOO--" %}yes{% endif %}')
+    assert_template_result('yes','{% if "FOO BAR"|truncatewords:1,"--"|downcase == "foo--" %}yes{% endif %}')
+    assert_template_result('yes','{% if "foo--" == "FOO BAR"|truncatewords:1,"--"|downcase %}yes{% endif %}')
+    # array transformation, to make sure we aren't converting arrays to strings somewhere along the way:
+    assert_template_result('yes','{% if values|sort == sorted %}yes{% endif %}', 'values' => %w{foo bar baz}, 'sorted' => %w{bar baz foo})
+  end
+  
+  def test_allow_no_spaces_in_filtered_expressions
+    assert_template_result('','{% if "foo--" == "FOO BAR" |truncatewords:1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"| truncatewords:1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords :1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords: 1,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1 ,"--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1, "--"|downcase %}yes{% endif %}')
+    assert_template_result('','{% if "foo--" == "FOO BAR"|truncatewords:1,"--" |downcase %}yes{% endif %}')
+  end
+  
   def test_syntax_error_no_variable
     assert_raise(SyntaxError){ assert_template_result('', '{% if jerry == 1 %}')}
   end

test/standard_filter_test.rb

@@ -67,6 +67,13 @@ class StandardFiltersTest < Test::Unit::TestCase
   
   def test_sort
     assert_equal [1,2,3,4], @filters.sort([4,3,2,1])    
+    assert_equal [{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], @filters.sort([{"a" => 4}, {"a" => 3}, {"a" => 1}, {"a" => 2}], "a")
+  end
+  
+  def test_map
+    assert_equal [1,2,3,4], @filters.map([{"a" => 1}, {"a" => 2}, {"a" => 3}, {"a" => 4}], 'a')
+    assert_template_result 'abc', "{{ ary | map:'foo' | map:'bar' }}",
+      'ary' => [{'foo' => {'bar' => 'a'}}, {'foo' => {'bar' => 'b'}}, {'foo' => {'bar' => 'c'}}]
   end
   
   def test_date
@@ -118,9 +125,25 @@ class StandardFiltersTest < Test::Unit::TestCase
     assert_template_result "a<br />\nb<br />\nc", "{{ source | newline_to_br }}", 'source' => "a\nb\nc"
   end
   
+  def test_plus
+    assert_template_result "2", "{{ 1 | plus:1 }}"
+    assert_template_result "11", "{{ '1' | plus:'1' }}"
+  end
   
+  def test_minus
+    assert_template_result "4", "{{ input | minus:operand }}", 'input' => 5, 'operand' => 1
+  end
   
+  def test_times
+    assert_template_result "12", "{{ 3 | times:4 }}"
+    assert_template_result "foofoofoofoo", "{{ 'foo' | times:4 }}"
+  end
   
+  def test_divided_by
+    assert_template_result "4", "{{ 12 | divided_by:3 }}"
+    assert_template_result "4", "{{ 14 | divided_by:3 }}"
+    assert_template_result "5", "{{ 15 | divided_by:3 }}"
+  end
   
 end
 

test/standard_tag_test.rb

@@ -99,6 +99,10 @@ HERE
     assert_template_result('+--', '{%for item in array%}{% if forloop.first %}+{% else %}-{% endif %}{%endfor%}', assigns)
   end
   
+  def test_for_with_filtered_expressions
+    assert_template_result('abc','{% for letter in letters|sort %}{{ letter }}{% endfor %}', 'letters' => %w{c b a})
+  end
+  
   def test_limiting
     assigns = {'array' => [1,2,3,4,5,6,7,8,9,0]}
     assert_template_result('12','{%for i in array limit:2 %}{{ i }}{%endfor%}',assigns)