API for app usage tracking

app/controllers/app_usages_controller.rb

@@ -0,0 +1,25 @@
+class AppUsagesController < ApplicationController
+  before_filter :authenticate_device
+  respond_to :json
+  
+  def create
+    app_usage = AppUsage.new(app_usage_params)
+    if app_usage.save
+      render json: {}, 
+            status: :created
+    else
+      logger.warn "Error while saving App Usage #{app_usage.errors.full_messages}"
+      render json: {}, 
+              status: :unprocessable_entity
+    end
+  end
+  private
+
+  def app_usage_params
+    params.require(:app_usage).
+      permit(:package_name,
+            :usage_duration_in_seconds,
+            :used_on)
+              
+  end
+end

app/models/app_usage.rb

@@ -0,0 +1,3 @@
+class AppUsage < ActiveRecord::Base
+  validates :package_name, :usage_duration_in_seconds, :used_on, presence: true
+end