feat(controller): add renderable helpers for html, json, and redirects

lib/prism/renderable.rb

@@ -0,0 +1,77 @@
+module Prism
+  module Renderable
+    def params
+      @request.params
+    end
+
+    def session
+      @env['prism.session'] ||= Params.new
+    end
+
+    def flash
+      @flash ||= Flash.new(session)
+    end
+
+    def cookies
+      @request.cookies
+    end
+
+    def status(code = nil)
+      @response.status = code if code
+      @response.status
+    end
+
+    def headers(hash = nil)
+      @response.headers.merge!(hash) if hash
+      @response.headers
+    end
+
+    def json(object, code = nil)
+      @response.status = code if code
+      @response['Content-Type'] = 'application/json'
+      payload = JSON.generate(object)
+      @response.body = [payload]
+      payload
+    end
+
+    def html(markup, code = nil)
+      @response.status = code if code
+      @response['Content-Type'] = 'text/html;charset=utf-8'
+      @response.body = [markup]
+      markup
+    end
+
+    def redirect(location, code = 302)
+      @response.status = code
+      @response['Location'] = location
+      @response.body = []
+      halt
+    end
+
+    def halt(code = nil, body = nil)
+      @response.status = code if code
+      case body
+      when String then @response.body = [body]
+      when Array then @response.body = body
+      end
+      throw :halt
+    end
+
+    def pass
+      throw :pass
+    end
+
+    def set_cookie(name, value, options = {})
+      @response.set_cookie(name, value, options)
+    end
+
+    def url_for(name, params = {})
+      router = @env['prism.router'] || raise('no router available for url_for')
+      router.path_to(name, params)
+    end
+
+    def finalize_flash
+      @flash.sweep if @flash
+    end
+  end
+end