[Google sheets] Show proper error messages

app/controllers/data_queries_controller.rb

@@ -42,7 +42,6 @@ class DataQueriesController < ApplicationController
 
     query_service = QueryService.new @data_query, params[:options], @current_user
     result = query_service.process
-
-    render json: result
+    render json: result, status: result[:code] || 200
   end
 end

app/services/googlesheets_query_service.rb

@@ -1,5 +1,5 @@
 class GooglesheetsQueryService
-  attr_accessor :query, :ource, :options, :source_options, :current_user
+  attr_accessor :query, :source, :options, :source_options, :current_user
 
   def initialize(data_query, options, source_options, current_user)
     @query = data_query
@@ -12,28 +12,56 @@ class GooglesheetsQueryService
   def process
     operation = query.options['operation']
     access_token = source_options['access_token']
+    error = false
 
     if operation === 'read'
+      result = read_data(access_token)
+
+      if result.code === 401
+        refresh_access_token
+        result = read_data(access_token)
+      end
+
+      if result.code === 200
+
+        headers = result['values'][0]
+        values = result['values'][1..]
+
+        data = []
+        values.each do |value|
+          row = {}
+          headers.each_with_index do |header, index|
+            row[header] = value[index]
+          end
+          parsed_values << row
+        end
+      
+      else 
+        error = true
+        data = result["error"]
+      end
+    end
+
+    if error
+      { status: 'error', code: 500, message: data["message"], data: data }
+    else
+      { status: 'success', data: data }
+    end
+  end
+
+  private
+    def read_data(access_token)
       spreadsheet_id = query.options['spreadsheet_id']
       sheet = query.options['sheet']
 
       result = HTTParty.get("https://sheets.googleapis.com/v4/spreadsheets/#{spreadsheet_id}/values/#{sheet}!A1:V101",
-                            headers: { 'Content-Type':
-                            'application/json', "Authorization": "Bearer #{access_token}" })
+        headers: { 'Content-Type':
+        'application/json', "Authorization": "Bearer #{access_token}" })
 
-      headers = result['values'][0]
-      values = result['values'][1..]
-
-      parsed_values = []
-      values.each do |value|
-        row = {}
-        headers.each_with_index do |header, index|
-          row[header] = value[index]
-        end
-        parsed_values << row
-      end
+      result
     end
 
-    { status: 'success', data: parsed_values }
-  end
+    def refresh_access_token
+
+    end
 end