Handle all asciicast attribute building outside of the controller

app/controllers/api/asciicasts_controller.rb

@@ -6,7 +6,7 @@ module Api
     attr_reader :asciicast
 
     def create
-      asciicast = asciicast_creator.create(*parse_request)
+      asciicast = asciicast_creator.create(asciicast_attributes)
       render text: asciicast_url(asciicast), status: :created,
         location: asciicast
 
@@ -29,37 +29,9 @@ module Api
 
     private
 
-    def parse_request
-      if legacy_format?
-        attrs, username, token = parse_format_0_request
-      else
-        attrs, username, token = parse_format_1_request
-      end
-
-      user = User.for_api_token!(token, username)
-
-      [attrs, user]
-    end
-
-    def legacy_format?
-      !params[:asciicast].try(:respond_to?, :read)
-    end
-
-    def parse_format_0_request
-      meta = JSON.parse(params[:asciicast][:meta].read)
+    def asciicast_attributes
       username, token = basic_auth_credentials
-      token ||= meta.delete('user_token')
-      username ||= meta.delete('username')
-      attrs = AsciicastParams.from_format_0_request(params[:asciicast].merge(meta: meta), request.user_agent)
-
-      [attrs, username, token]
-    end
-
-    def parse_format_1_request
-      username, token = basic_auth_credentials
-      attrs = AsciicastParams.from_format_1_request(params[:asciicast], request.user_agent)
-
-      [attrs, username, token]
+      AsciicastParams.build(params[:asciicast], username, token, request.user_agent)
     end
 
     def basic_auth_credentials

app/models/asciicast_params.rb

@@ -1,10 +1,19 @@
 class AsciicastParams
 
-  def self.from_format_0_request(params, user_agent)
-    meta = params[:meta]
+  def self.build(asciicast_params, username, token, user_agent)
+    if asciicast_params.try(:respond_to?, :read)
+      from_format_1_request(asciicast_params, username, token, user_agent)
+    else
+      from_format_0_request(asciicast_params, username, token, user_agent)
+    end
+  end
+
+  def self.from_format_0_request(params, username, token, user_agent)
+    meta = JSON.parse(params.delete(:meta).read)
+    token ||= meta.delete('user_token')
+    username ||= meta.delete('username')
 
     attributes = {
-      version:          0,
       command:          meta['command'],
       duration:         meta['duration'],
       shell:            meta['shell'],
@@ -16,6 +25,8 @@ class AsciicastParams
       terminal_lines:   meta['term']['lines'],
       terminal_type:    meta['term']['type'],
       title:            meta['title'],
+      user:             User.for_api_token!(token, username),
+      version:          0,
     }
 
     if meta['uname'] # old client, with useless user_agent
@@ -27,21 +38,22 @@ class AsciicastParams
     attributes
   end
 
-  def self.from_format_1_request(asciicast_file, user_agent)
+  def self.from_format_1_request(asciicast_file, username, token, user_agent)
     asciicast = Oj.sc_parse(AsciicastHandler.new, asciicast_file)
     env = asciicast['env']
 
     {
-      version: 1,
+      command:          asciicast['command'],
+      duration:         asciicast['duration'],
+      file:             asciicast_file,
+      shell:            env && env['SHELL'],
       terminal_columns: asciicast['width'],
       terminal_lines:   asciicast['height'],
-      duration:         asciicast['duration'],
-      command:          asciicast['command'],
-      title:            asciicast['title'],
-      shell:            env && env['SHELL'],
       terminal_type:    env && env['TERM'],
-      file:             asciicast_file,
+      title:            asciicast['title'],
+      user:             User.for_api_token!(token, username),
       user_agent:       user_agent,
+      version: 1,
     }
   end
 

app/services/asciicast_creator.rb

@@ -1,7 +1,7 @@
 class AsciicastCreator
 
-  def create(attributes, user)
-    asciicast = Asciicast.create!(attributes.merge(user: user))
+  def create(attributes)
+    asciicast = Asciicast.create!(attributes)
     AsciicastWorker.perform_async(asciicast.id)
 
     asciicast

spec/models/asciicast_params_spec.rb

@@ -1,65 +0,0 @@
-require 'rails_helper'
-require 'stringio'
-
-describe AsciicastParams do
-
-  describe '.build' do
-    subject { described_class.build(input, user_agent) }
-
-    let(:input) { {
-      meta:          meta,
-      stdout:        stdout_data_file,
-      stdout_timing: stdout_timing_file,
-    } }
-
-    let(:user_agent) { 'asciinema/0.9.7' }
-
-    let(:stdout_data_file) { double('stdout_data_file') }
-    let(:stdout_timing_file) { double('stdout_timing_file') }
-
-    let(:meta) { HashWithIndifferentAccess.new({
-      command:    '/bin/bash',
-      duration:   11.146430015563965,
-      shell:      '/bin/zsh',
-      term:       { lines: 26, columns: 96, type: 'screen-256color' },
-      title:      'bashing :)',
-      user_token: 'f33e6188-f53c-11e2-abf4-84a6c827e88b',
-      username:   'kill',
-    }) }
-
-    let(:expected_attrs) { {
-      command:          '/bin/bash',
-      duration:         11.146430015563965,
-      shell:            '/bin/zsh',
-      stdin_data:       nil,
-      stdin_timing:     nil,
-      stdout_data:      stdout_data_file,
-      stdout_timing:    stdout_timing_file,
-      terminal_columns: 96,
-      terminal_lines:   26,
-      terminal_type:    'screen-256color',
-      title:            'bashing :)',
-      user_agent:       'asciinema/0.9.7',
-    } }
-
-    let(:existing_user) { User.new }
-
-    before do
-      allow(User).to receive(:for_api_token).
-        with('f33e6188-f53c-11e2-abf4-84a6c827e88b') { existing_user }
-    end
-
-    it { should eq(expected_attrs) }
-
-    context "when uname given" do
-      before do
-        meta[:uname] = 'Linux 3.9.9-302.fc19.x86_64'
-        expected_attrs[:uname] = 'Linux 3.9.9-302.fc19.x86_64'
-        expected_attrs.delete(:user_agent)
-      end
-
-      it { should eq(expected_attrs) }
-    end
-  end
-
-end