initialize gem

.gitignore

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+*.gem
+*.rbc
+.bundle
+.config
+.yardoc
+Gemfile.lock
+InstalledFiles
+_yardoc
+coverage
+doc/
+lib/bundler/man
+pkg
+rdoc
+spec/reports
+test/tmp
+test/version_tmp
+tmp

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in client_variable.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2013 MQuy
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# ClientVariable
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'client_variable'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install client_variable
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

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+require "bundler/gem_tasks"

client_variable.gemspec

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+# coding: utf-8
+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'client_variable/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "client_variable"
+  spec.version       = ClientVariable::VERSION
+  spec.authors       = ["MQuy"]
+  spec.email         = ["sugiacupit@gmail.com"]
+  spec.description   = %q{export variable from rails}
+  spec.summary       = %q{variable rails in client}
+  spec.homepage      = ""
+  spec.license       = "MIT"
+  spec.rubyforge_project = "client_variable"
+
+  spec.files         = `git ls-files`.split($/)
+  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_development_dependency "bundler", "~> 1.3"
+  spec.add_development_dependency "rake"
+end

lib/client_variable.rb

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+require "client_variable/version"
+
+module Client
+	class Variable
+		class << self
+			def global
+				Global
+			end
+
+			def get_variable(name)
+				Request.values[name]
+			end
+
+			def set_variable(name, value)
+				Request.values[name] = value
+			end
+
+			def values
+				Request.values
+			end
+
+			def clear
+				Request.clear
+			end
+
+			def method_missing(method, *args, &block)
+				if ( method.to_s =~ /=$/ )
+					if public_methods? method
+						raise "You can't use Gon public methods for storing data"
+					end
+					set_variable(method.to_s.delete('='), args[0])
+				else
+					get_variable(method.to_s)
+				end
+			end
+		end
+	end
+
+	def self.generate
+		data = YAML.load(ERB.new(File.new("#{Rails.root}/config/client_variable.yml").read).result)[Rails.env]
+		data.merge([Global.values, Request.values].inject(:merge)).to_json
+	end
+
+	class Engine < ::Rails::Engine; end
+
+	require 'client_variable/request'
+	require 'client_variable/global'
+	require 'client_variable/helper/view'
+	require 'client_variable/helper/controller'
+end

lib/client_variable/global.rb

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+module Client
+	class Global < Variable
+		class << self
+			def values
+				@datum ||= {}
+			end
+
+			def clear
+				@datum = {}
+			end
+
+			def get_variable(name)
+				values[name]
+			end
+
+			def set_variable(name, value)
+				values[name] = value
+			end
+		end
+	end
+end

lib/client_variable/helper/controller.rb

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+module Client
+  module Helpers
+    module Instance
+      def self.included base
+        base.send(:include, InstanceMethods)
+      end
+
+      module InstanceMethods
+        def client
+          if new_request?
+            Request.id = request.object_id
+            Request.env = request.env
+          end
+          Variable
+        end
+
+        private
+        def new_request?
+          Request.env.blank? || Request.id != request.object_id
+        end
+      end
+    end
+  end
+end
+
+ActionController::Base.send :include, Client::Helpers::Instance

lib/client_variable/helper/view.rb

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+module Client
+  module Helpers
+    module View
+      extend ActionView::Helpers::JavaScriptHelper
+      extend ActionView::Helpers::TagHelper
+
+      def self.included base
+        base.send(:include, InstanceMethods)
+      end
+
+      module InstanceMethods
+        def include_variable
+          render_data
+        end
+
+        private
+        def render_data
+          script  = "window.rails = {};"
+          script << formatted_data
+          script = javascript_tag(script)
+          script.html_safe
+        end
+
+        def formatted_data
+          script = ''
+          values.each do |key, val|
+            js_key = key.to_s.camelize(:lower)
+            script << "rails.#{js_key}=#{normalize(val).to_json};"
+          end
+          script
+        end
+
+        def normalize(value, depth=0)
+          return value if depth > 1000
+          return value unless value.is_a? Hash
+
+          Hash[value.map { |k, v|
+            [ k.to_s.camelize(:lower), normalize(v, depth + 1) ]
+          }]
+        end
+
+        def values
+          [Global.values, Request.values].inject(:merge)
+        end
+      end
+    end
+  end
+end
+
+ActionView::Base.send :include, Client::Helpers::View

lib/client_variable/request.rb

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+module Client
+  class Request
+    class << self
+      def env
+        @request_env if defined? @request_env
+      end
+
+      def env=(environment)
+        @request_env = environment
+        @request_env['client'] ||= {}
+      end
+
+      def id
+        @request_id if defined? @request_id
+      end
+
+      def id=(request_id)
+        @request_id = request_id
+      end
+
+      def values
+        env['client'] if env
+      end
+
+      def clear
+        env && (env['client'] = {})
+      end
+    end
+  end
+end

lib/client_variable/version.rb

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+module ClientVariable
+  VERSION = "0.0.1"
+end

lib/generators/client_variable/install/install_generator.rb

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+module ClientVariable
+  module Generators
+    class InstallGenerator < Rails::Generators::Base
+      source_root File.expand_path("../templates", __FILE__)
+
+      desc "Generates a variable config"
+
+      def create_config_file
+        template "config.yml", "config/client_variable.yml"
+      end
+    end
+  end
+end

lib/generators/client_variable/install/templates/config.yml

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+development:
+	x: 1
+
+production:
+	x:1

vendor/assets/javascripts/variable.js.erb

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+rails = (function(exports, global) {
+	var datum = deepMerge(exports, <%= Client.generate%>);
+	var defaultSeparator = '.';
+
+	function lookup(query, track) {
+		var parts = separateQuery(query),
+				part = null,
+				messages = datum;
+		while(messages) {
+			part = parts.shift();
+			if (parts.length == 0) break;
+			if (track && !messages[parts]) messages[part] = {};
+			messages = messages[part];
+		}
+		return messages;
+	}
+
+	function deepMerge(target, source) {
+		for(var key in source) {
+			if (source.hasOwnProperty(key)) {
+				target[key] = source[key];
+			}
+		}
+		return target;
+	}
+
+	function separateQuery(query, n) {
+		var parts = query.split(defaultSeparator);
+		if (n < 0) n += parts.length
+		return n ? parts[n] : parts;
+	}
+
+	return {
+		set: function(name, value) {
+			var parent = lookup(name, true);
+			if (parent) parent[separateQuery(name, -1)] = value;
+		},
+		get: function(name) {
+			var parent = lookup(name);
+			return (parent = lookup(name)) ? parent[separateQuery(name, -1)] : parent;
+		},
+		values: datum
+	}
+}(rails || {}, this));