api.rb

require 'sinatra/base'
require 'web_utils'
require 'populate_me/version'
require 'json'

class PopulateMe::API < Sinatra::Base

  use Rack::MethodOverride

  set :show_exceptions, false

  before do
    content_type :json
  end

  after do
    redirect(params['_destination']) unless params['_destination'].nil?
  end

  get '/' do
    status 200
    {'success'=>true}.to_json
  end

  get '/version' do
    status 200
    {'success'=>true, 'version'=>PopulateMe::VERSION}.to_json
  end

  get '/:model' do
  end

  post '/:model' do
    model_class = resolve_model_class params[:model]
    model_instance = model_class.new.set_from_hash((params[:data]||{}), typecast: true)
    if model_instance.valid?
      model_instance.save
      status 201
      {
        'success'=>true,'message'=>'Created Successfully',
        'data'=>model_instance.to_h
      }.to_json
    else
      status 400
      {
        'success'=>false,'message'=>'Invalid Document',
        'data'=>model_instance.error_report
      }.to_json
    end
  end

  put '/:model' do
    pass unless params[:action]=='sort'
    model_class = resolve_model_class params[:model]
    model_class.set_indexes(params[:field].to_sym,params[:ids])
    {'success'=>true,'message'=>'Sorted Successfully'}.to_json
  end

  get '/:model/:id' do
    model_class = resolve_model_class params[:model]
    model_instance = resolve_model_instance model_class, params[:id]
    {'success'=>true,'data'=>model_instance.to_h}.to_json
  end

  put '/:model/:id' do
    model_class = resolve_model_class params[:model]
    model_instance = resolve_model_instance model_class, params[:id]
    model_instance.set_from_hash params[:data], typecast: true
    if model_instance.valid?
      model_instance.save
      {
        'success'=>true,'message'=>'Updated Successfully',
        'data'=>model_instance.to_h
      }.to_json
    else
      status 400
      {
        'success'=>false,'message'=>'Invalid Document',
        'data'=>model_instance.error_report
      }.to_json
    end
  end

  delete '/:model/:id' do
    model_class = resolve_model_class params[:model]
    model_instance = resolve_model_instance model_class, params[:id]
    model_instance.delete
    {'success'=>true,'message'=>'Deleted Successfully','data'=>model_instance.to_h}.to_json
  end

  not_found do
    response.headers['X-Cascade'] = 'pass'
    {'success'=>false,'message'=>'Not Found'}.to_json
  end

  error do
    puts
    puts env['sinatra.error'].inspect
    puts
    {'success'=>false,'message'=>env['sinatra.error'].message}.to_json
  end

  module Helpers

    include WebUtils

    def resolve_model_class name
      model_class = resolve_dasherized_class_name(name) rescue nil
      halt(404) unless model_class.respond_to?(:admin_get)
      model_class
    end

    def resolve_model_instance model_class, id
      instance = model_class.admin_get id
      halt(404) if instance.nil?
      instance
    end

  end

  helpers Helpers

end