extract JSONToken gem

fixes: CNVS-11785

Test Plan:
Automated tests will check most of it.  Make sure Canvas is not broken.

Change-Id: I797a71b492a043fc7d14b88457842bbde4295bb2
Reviewed-on: https://gerrit.instructure.com/31719
Reviewed-by: Jacob Fugal <jacob@instructure.com>
Product-Review: Simon Williams <simon@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: August Thornton <august@instructure.com>

Gemfile.d/other_stuff.rb

@@ -124,6 +124,7 @@ gem 'canvas_statsd', :path => 'gems/canvas_statsd'
 gem 'canvas_stringex', :path => 'gems/canvas_stringex'
 gem 'canvas_uuid', :path => 'gems/canvas_uuid'
 gem 'html_text_helper', :path => 'gems/html_text_helper'
+gem 'json_token', :path => 'gems/json_token'
 gem 'lti_outbound', :path => 'gems/lti_outbound'
 gem 'multipart', :path => 'gems/multipart'
 gem 'utf8_cleaner', :path => 'gems/utf8_cleaner'

gems/json_token/Gemfile

@@ -0,0 +1,3 @@
+source 'https://rubygems.org'
+
+gemspec

gems/json_token/Rakefile

@@ -0,0 +1 @@
+require "bundler/gem_tasks"

gems/json_token/json_token.gemspec

@@ -0,0 +1,23 @@
+# coding: utf-8
+
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+
+Gem::Specification.new do |spec|
+  spec.name          = "json_token"
+  spec.version       = "0.0.1"
+  spec.authors       = ["Nick Cloward", "Joseph Rodriguez"]
+  spec.email         = ["nickc@instructure.com", "jrodriguez@pivotallabs.com"]
+  spec.summary       = %q{Convenience methods for encoding and decoding a slug of data into base64 encoded JSON}
+
+  spec.files         = Dir.glob("{lib}/**/*") + %w(Rakefile)
+  spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
+  spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency 'json', '1.8.1'
+
+  spec.add_development_dependency "bundler", "~> 1.5"
+  spec.add_development_dependency "rake"
+  spec.add_development_dependency "rspec"
+end

gems/json_token/lib/json_token.rb

@@ -1,5 +1,5 @@
 #
-# Copyright (C) 2011 Instructure, Inc.
+# Copyright (C) 2014 Instructure, Inc.
 #
 # This file is part of Canvas.
 #
@@ -16,6 +16,9 @@
 # with this program. If not, see <http://www.gnu.org/licenses/>.
 #
 
+require 'json'
+require 'base64'
+
 # Convenience methods for encoding and decoding a slug of data into base64
 # encoded JSON, e.g. to use in a URL
 module JSONToken

gems/json_token/spec/json_token_spec.rb

@@ -0,0 +1,29 @@
+#
+# Copyright (C) 2014 Instructure, Inc.
+#
+# This file is part of Canvas.
+#
+# Canvas is free software: you can redistribute it and/or modify it under
+# the terms of the GNU Affero General Public License as published by the Free
+# Software Foundation, version 3 of the License.
+#
+# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
+# details.
+#
+# You should have received a copy of the GNU Affero General Public License along
+# with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+require 'spec_helper'
+
+describe JSONToken do
+  it 'should encode' do
+    expect(JSONToken.encode({a: 123, b: [1, 2, '13']})).to eq "eyJhIjoxMjMsImIiOlsxLDIsIjEzIl19"
+  end
+
+  it 'should decode' do
+    expect(JSONToken.decode("eyJhIjoxMjMsImIiOlsxLDIsIjEzIl19")).to eq({"a" => 123, "b" => [1, 2, "13"]})
+  end
+end

gems/json_token/spec/spec_helper.rb

@@ -0,0 +1,9 @@
+require 'json_token'
+
+RSpec.configure do |config|
+  config.treat_symbols_as_metadata_keys_with_true_values = true
+  config.run_all_when_everything_filtered = true
+  config.filter_run :focus
+  config.color_enabled = true
+  config.order = 'random'
+end

gems/json_token/test.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+result=0
+
+bundle install
+bundle exec rspec spec
+let result=$result+$?
+
+if [ $result -eq 0 ]; then
+    echo "SUCCESS"
+else
+    echo "FAILURE"
+fi
+
+exit $result