add status controller

app/controllers/api/status_controller.rb

@@ -0,0 +1,13 @@
+class Api::StatusController < ApplicationController
+  def index
+    process = system("ruby #{Rails.root.join('lib', 'sync_control.rb')} status")
+
+    render json: {
+      result: {
+        status: process ? "running" : "not running",
+        currentBlockNumber: CitaSync::Basic.number_to_hex_str(Block.current_block_number || 0),
+        currentChainBlockNumber: CitaSync::Api.block_number["result"]
+      }
+    }
+  end
+end

config/routes.rb

@@ -8,5 +8,6 @@
     resources :blocks, only: [:index]
     resources :transactions, only: [:index]
     resources :statistics, only: [:index]
+    resources :status, only: [:index]
   end
 end

spec/controllers/api/status_controller_spec.rb

@@ -0,0 +1,20 @@
+require 'rails_helper'
+
+RSpec.describe Api::StatusController, type: :controller do
+  let(:result) { Oj.load(response.body).with_indifferent_access[:result] }
+
+  before do
+    create :block_zero
+    mock_block_number
+  end
+
+  context "index" do
+    it "with no running" do
+      post :index
+
+      expect(result["status"]).to eq "not running"
+      expect(result["currentBlockNumber"]).to eq "0x0"
+      expect(result["currentChainBlockNumber"]).to eq "0x1"
+    end
+  end
+end