Sync resource

app/controllers/api/syncs_controller.rb

@@ -0,0 +1,12 @@
+
+# Generates a tree of all syncable resources. Typically used by a FarmBot device
+# for caching of resources. 
+module Api
+  class SyncsController < Api::AbstractController
+
+    # GET /api/sync
+    def show
+      mutate Sync::Fetch.run(device: current_device)
+    end
+  end
+end

app/mutations/sync/fetch.rb

@@ -0,0 +1,18 @@
+module Sync
+  class Fetch  < Mutations::Command
+    required do
+      model :device, class: Device
+    end
+
+    def execute
+      message = {
+          device: device,
+          users: device.users,
+          sequences: device.sequences,
+          regimens: device.regimens
+      }.as_json
+      message[:checksum] = Digest::MD5.hexdigest(Marshal::dump(message))
+      message
+    end
+  end
+end

config/routes.rb

@@ -1,6 +1,7 @@
 FarmBot::Application.routes.draw do
 
   namespace :api, defaults: {format: :json} do
+    resource :sync, only: [:show]
     resource :public_key, only: [:show]
     resource :tokens, only: [:create]
     resource :users, only: [:create]

spec/controllers/api/sync/sync_spec.rb

@@ -0,0 +1,24 @@
+require 'spec_helper'
+
+describe Api::SyncsController do
+  include Devise::Test::ControllerHelpers
+  describe '#index' do
+
+    let(:user) { FactoryGirl.create(:user) }
+    it 'downloads a sync object' do
+      sign_in user
+      device_id = user.device.id
+      sequences = FactoryGirl
+                    .create_list(:sequence, 2, device_id: device_id)
+      schedule_ids = user.device.sequences.map(&:id).sort
+
+      get :show
+
+      expect(response.status).to eq(200)
+      expect(json).to be_a_kind_of(Hash)
+      expect(json[:device][:id]).to eq(device_id)
+      expect(json[:sequences].length).to eq(2)
+      expect(json[:sequences].map { |s| s[:id] }.sort).to eq(schedule_ids)
+    end
+  end
+end