Unfinished if statement parser.

lib/liquid/parser.rb

@@ -31,6 +31,15 @@ module Liquid
       token.contents
     end
 
+    # Like consume? Except for an :id token of a certain name
+    def id?(str)
+      token = @tokens[@p]
+      return false unless token && token.type == :id
+      return false unless token.contents == str
+      @p += 1
+      token.contents
+    end
+
     def cur_token()
       tok = @tokens[@p]
       raise SyntaxError, 'Expected more input.' unless tok

lib/liquid/tags/if.rb

@@ -45,28 +45,49 @@ module Liquid
         block = if tag == 'else'
           ElseCondition.new
         else
-
+          old_parse(markup)
-          expressions = markup.scan(ExpressionsAndOperators).reverse
-          raise(SyntaxError, SyntaxHelp) unless expressions.shift =~ Syntax
-
-          condition = Condition.new($1, $2, $3)
-
-          while not expressions.empty?
-            operator = (expressions.shift).to_s.strip
-
-            raise(SyntaxError, SyntaxHelp) unless expressions.shift.to_s =~ Syntax
-
-            new_condition = Condition.new($1, $2, $3)
-            new_condition.send(operator.to_sym, condition)
-            condition = new_condition
-          end
-
-          condition
         end
 
         @blocks.push(block)
         @nodelist = block.attach(Array.new)
       end
+
+      def old_parse(markup)
+        expressions = markup.scan(ExpressionsAndOperators).reverse
+        raise(SyntaxError, SyntaxHelp) unless expressions.shift =~ Syntax
+
+        condition = Condition.new($1, $2, $3)
+
+        while not expressions.empty?
+          operator = (expressions.shift).to_s.strip
+
+          raise(SyntaxError, SyntaxHelp) unless expressions.shift.to_s =~ Syntax
+
+          new_condition = Condition.new($1, $2, $3)
+          new_condition.send(operator.to_sym, condition)
+          condition = new_condition
+        end
+
+        condition
+      end
+
+      def parse_condition(markup)
+        p = Parser.new(markup)
+
+        condition = parse_comparison(p)
+
+        while op = (p.id?('and') || p.id?('or'))
+          new_cond = parse_comparison(p)
+          new_cond.send(op.to_sym, condition)
+          condition = new_cond
+        end
+
+        condition
+      end
+
+      def parse_comparison(p)
+        
+      end
   end
 
   Template.register_tag('if', If)