Froze rails gems

[depot.git] / vendor / rails / activesupport / lib / active_support / json / decoding.rb

diff --git a/vendor/rails/activesupport/lib/active_support/json/decoding.rb b/vendor/rails/activesupport/lib/active_support/json/decoding.rb
new file mode 100644 (file)
index 0000000..fdb219d
--- /dev/null
+++ b/vendor/rails/activesupport/lib/active_support/json/decoding.rb
@@ -0,0 +1,63 @@
+require 'yaml'
+require 'strscan'
+
+module ActiveSupport
+  module JSON
+    class ParseError < StandardError
+    end
+    
+    class << self
+      # Converts a JSON string into a Ruby object.
+      def decode(json)
+        YAML.load(convert_json_to_yaml(json))
+      rescue ArgumentError => e
+        raise ParseError, "Invalid JSON string"
+      end
+      
+      protected
+        # matches YAML-formatted dates
+        DATE_REGEX = /^\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[ \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?)?$/
+
+        # Ensure that ":" and "," are always followed by a space
+        def convert_json_to_yaml(json) #:nodoc:
+          scanner, quoting, marks, pos, times = StringScanner.new(json), false, [], nil, []
+          while scanner.scan_until(/(\\['"]|['":,\\]|\\.)/)
+            case char = scanner[1]
+            when '"', "'"
+              if !quoting
+                quoting = char
+                pos = scanner.pos
+              elsif quoting == char
+                if json[pos..scanner.pos-2] =~ DATE_REGEX
+                  # found a date, track the exact positions of the quotes so we can remove them later.
+                  # oh, and increment them for each current mark, each one is an extra padded space that bumps
+                  # the position in the final YAML output
+                  total_marks = marks.size
+                  times << pos+total_marks << scanner.pos+total_marks
+                end
+                quoting = false
+              end
+            when ":",","
+              marks << scanner.pos - 1 unless quoting
+            end
+          end
+
+          if marks.empty?
+            json.gsub(/\\\//, '/')
+          else
+            left_pos  = [-1].push(*marks)
+            right_pos = marks << json.length
+            output    = []
+            left_pos.each_with_index do |left, i|
+              output << json[left.succ..right_pos[i]]
+            end
+            output = output * " "
+            
+            times.each { |i| output[i-1] = ' ' }
+            output.gsub!(/\\\//, '/')
+            output
+          end
+        end
+    end
+  end
+end