Add REST API to retrieve financial transactions

Gemfile

@@ -30,6 +30,7 @@ gem 'simple_form'
 gem 'inherited_resources'
 gem 'localize_input', git: "git://github.com/bennibu/localize_input.git"
 gem 'daemons'
+gem 'doorkeeper'
 gem 'twitter-bootstrap-rails', '~> 2.2.8'
 gem 'simple-navigation', '~> 3.14.0' # 3.x for simple_navigation_bootstrap
 gem 'simple-navigation-bootstrap'

Gemfile.lock

@@ -142,6 +142,8 @@ GEM
     diff-lcs (1.2.5)
     diffy (3.1.0)
     docile (1.1.5)
+    doorkeeper (3.1.0)
+      railties (>= 3.2)
     erubis (2.7.0)
     eventmachine (1.0.9.1)
     exception_notification (4.1.4)
@@ -483,6 +485,7 @@ DEPENDENCIES
   daemons
   database_cleaner
   date_time_attribute
+  doorkeeper
   exception_notification
   factory_girl_rails
   faker

app/controllers/api/v1/base_controller.rb

@@ -0,0 +1,23 @@
+class Api::V1::BaseController < ApplicationController
+  protect_from_forgery with: :null_session
+
+  before_action :destroy_session
+  rescue_from ActiveRecord::RecordNotFound, with: :not_found
+
+  def authenticate
+    doorkeeper_authorize!
+    super if current_user
+  end
+
+  def current_user
+    User.find(doorkeeper_token.resource_owner_id) if doorkeeper_token
+  end
+
+  def destroy_session
+    request.session_options[:skip] = true
+  end
+
+  def not_found
+    render status: 404, json: {error: 'Not found'}
+  end
+end

app/controllers/api/v1/financial_transactions_controller.rb

@@ -0,0 +1,16 @@
+class Api::V1::FinancialTransactionsController < Api::V1::BaseController
+  def index
+    ordergroup = current_user.ordergroup
+    ft = ordergroup ? ordergroup.financial_transactions.map { |t| t.id } : []
+    render json: ft
+  end
+
+  def show
+    ft = FinancialTransaction.find_by! id: params[:id], ordergroup: current_user.ordergroup
+    render json: {
+      user: ft.user.display,
+      amount: ft.amount.to_f,
+      note: ft.note
+    }
+  end
+end

config/initializers/doorkeeper.rb

@@ -0,0 +1,108 @@
+Doorkeeper.configure do
+  # Change the ORM that doorkeeper will use (needs plugins)
+  orm :active_record
+
+  # This block will be called to check whether the resource owner is authenticated or not.
+  resource_owner_authenticator do
+    User.find_by_id(session[:user_id]) || redirect_to(login_url)
+  end
+
+  resource_owner_from_credentials do
+    User.authenticate(params[:username], params[:password])
+  end
+
+  # If you want to restrict access to the web interface for adding oauth authorized applications, you need to declare the block below.
+  # admin_authenticator do
+  #   # Put your admin authentication logic here.
+  #   # Example implementation:
+  #   Admin.find_by_id(session[:admin_id]) || redirect_to(new_admin_session_url)
+  # end
+
+  # Authorization Code expiration time (default 10 minutes).
+  # authorization_code_expires_in 10.minutes
+
+  # Access token expiration time (default 2 hours).
+  # If you want to disable expiration, set this to nil.
+  # access_token_expires_in 2.hours
+
+  # Assign a custom TTL for implicit grants.
+  # custom_access_token_expires_in do |oauth_client|
+  #   oauth_client.application.additional_settings.implicit_oauth_expiration
+  # end
+
+  # Use a custom class for generating the access token.
+  # https://github.com/doorkeeper-gem/doorkeeper#custom-access-token-generator
+  # access_token_generator "::Doorkeeper::JWT"
+
+  # Reuse access token for the same resource owner within an application (disabled by default)
+  # Rationale: https://github.com/doorkeeper-gem/doorkeeper/issues/383
+  # reuse_access_token
+
+  # Issue access tokens with refresh token (disabled by default)
+  use_refresh_token
+
+  # Provide support for an owner to be assigned to each registered application (disabled by default)
+  # Optional parameter :confirmation => true (default false) if you want to enforce ownership of
+  # a registered application
+  # Note: you must also run the rails g doorkeeper:application_owner generator to provide the necessary support
+  # enable_application_owner :confirmation => false
+
+  # Define access token scopes for your provider
+  # For more information go to
+  # https://github.com/doorkeeper-gem/doorkeeper/wiki/Using-Scopes
+  # default_scopes  :public
+  # optional_scopes :write, :update
+
+  # Change the way client credentials are retrieved from the request object.
+  # By default it retrieves first from the `HTTP_AUTHORIZATION` header, then
+  # falls back to the `:client_id` and `:client_secret` params from the `params` object.
+  # Check out the wiki for more information on customization
+  # client_credentials :from_basic, :from_params
+
+  # Change the way access token is authenticated from the request object.
+  # By default it retrieves first from the `HTTP_AUTHORIZATION` header, then
+  # falls back to the `:access_token` or `:bearer_token` params from the `params` object.
+  # Check out the wiki for more information on customization
+  # access_token_methods :from_bearer_authorization, :from_access_token_param, :from_bearer_param
+
+  # Change the native redirect uri for client apps
+  # When clients register with the following redirect uri, they won't be redirected to any server and the authorization code will be displayed within the provider
+  # The value can be any string. Use nil to disable this feature. When disabled, clients must provide a valid URL
+  # (Similar behaviour: https://developers.google.com/accounts/docs/OAuth2InstalledApp#choosingredirecturi)
+  #
+  # native_redirect_uri 'urn:ietf:wg:oauth:2.0:oob'
+
+  # Forces the usage of the HTTPS protocol in non-native redirect uris (enabled
+  # by default in non-development environments). OAuth2 delegates security in
+  # communication to the HTTPS protocol so it is wise to keep this enabled.
+  #
+  # force_ssl_in_redirect_uri !Rails.env.development?
+
+  # Specify what grant flows are enabled in array of Strings. The valid
+  # strings and the flows they enable are:
+  #
+  # "authorization_code" => Authorization Code Grant Flow
+  # "implicit"           => Implicit Grant Flow
+  # "password"           => Resource Owner Password Credentials Grant Flow
+  # "client_credentials" => Client Credentials Grant Flow
+  #
+  # If not specified, Doorkeeper enables authorization_code and
+  # client_credentials.
+  #
+  # implicit and password grant flows have risks that you should understand
+  # before enabling:
+  #   http://tools.ietf.org/html/rfc6819#section-4.4.2
+  #   http://tools.ietf.org/html/rfc6819#section-4.4.3
+  #
+  grant_flows %w(authorization_code password)
+
+  # Under some circumstances you might want to have applications auto-approved,
+  # so that the user skips the authorization step.
+  # For example if dealing with a trusted application.
+  # skip_authorization do |resource_owner, client|
+  #   client.superapp? or resource_owner.admin?
+  # end
+
+  # WWW-Authenticate Realm (default "Doorkeeper").
+  realm "Foodsoft"
+end

config/locales/doorkeeper.en.yml

@@ -0,0 +1,123 @@
+en:
+  activerecord:
+    attributes:
+      doorkeeper/application:
+        name: 'Name'
+        redirect_uri: 'Redirect URI'
+    errors:
+      models:
+        doorkeeper/application:
+          attributes:
+            redirect_uri:
+              fragment_present: 'cannot contain a fragment.'
+              invalid_uri: 'must be a valid URI.'
+              relative_uri: 'must be an absolute URI.'
+              secured_uri: 'must be an HTTPS/SSL URI.'
+
+  doorkeeper:
+    applications:
+      confirmations:
+        destroy: 'Are you sure?'
+      buttons:
+        edit: 'Edit'
+        destroy: 'Destroy'
+        submit: 'Submit'
+        cancel: 'Cancel'
+        authorize: 'Authorize'
+      form:
+        error: 'Whoops! Check your form for possible errors'
+      help:
+        redirect_uri: 'Use one line per URI'
+        native_redirect_uri: 'Use %{native_redirect_uri} for local tests'
+        scopes: 'Separate scopes with spaces. Leave blank to use the default scopes.'
+      edit:
+        title: 'Edit application'
+      index:
+        title: 'Your applications'
+        new: 'New Application'
+        name: 'Name'
+        callback_url: 'Callback URL'
+      new:
+        title: 'New Application'
+      show:
+        title: 'Application: %{name}'
+        application_id: 'Application Id'
+        secret: 'Secret'
+        scopes: 'Scopes'
+        callback_urls: 'Callback urls'
+        actions: 'Actions'
+
+    authorizations:
+      buttons:
+        authorize: 'Authorize'
+        deny: 'Deny'
+      error:
+        title: 'An error has occurred'
+      new:
+        title: 'Authorization required'
+        prompt: 'Authorize %{client_name} to use your account?'
+        able_to: 'This application will be able to'
+      show:
+        title: 'Authorization code'
+
+    authorized_applications:
+      confirmations:
+        revoke: 'Are you sure?'
+      buttons:
+        revoke: 'Revoke'
+      index:
+        title: 'Your authorized applications'
+        application: 'Application'
+        created_at: 'Created At'
+        date_format: '%Y-%m-%d %H:%M:%S'
+
+    errors:
+      messages:
+        # Common error messages
+        invalid_request: 'The request is missing a required parameter, includes an unsupported parameter value, or is otherwise malformed.'
+        invalid_redirect_uri: 'The redirect uri included is not valid.'
+        unauthorized_client: 'The client is not authorized to perform this request using this method.'
+        access_denied: 'The resource owner or authorization server denied the request.'
+        invalid_scope: 'The requested scope is invalid, unknown, or malformed.'
+        server_error: 'The authorization server encountered an unexpected condition which prevented it from fulfilling the request.'
+        temporarily_unavailable: 'The authorization server is currently unable to handle the request due to a temporary overloading or maintenance of the server.'
+
+        #configuration error messages
+        credential_flow_not_configured: 'Resource Owner Password Credentials flow failed due to Doorkeeper.configure.resource_owner_from_credentials being unconfigured.'
+        resource_owner_authenticator_not_configured: 'Resource Owner find failed due to Doorkeeper.configure.resource_owner_authenticator being unconfiged.'
+
+        # Access grant errors
+        unsupported_response_type: 'The authorization server does not support this response type.'
+
+        # Access token errors
+        invalid_client: 'Client authentication failed due to unknown client, no client authentication included, or unsupported authentication method.'
+        invalid_grant: 'The provided authorization grant is invalid, expired, revoked, does not match the redirection URI used in the authorization request, or was issued to another client.'
+        unsupported_grant_type: 'The authorization grant type is not supported by the authorization server.'
+
+        # Password Access token errors
+        invalid_resource_owner: 'The provided resource owner credentials are not valid, or resource owner cannot be found'
+
+        invalid_token:
+          revoked: "The access token was revoked"
+          expired: "The access token expired"
+          unknown: "The access token is invalid"
+
+    flash:
+      applications:
+        create:
+          notice: 'Application created.'
+        destroy:
+          notice: 'Application deleted.'
+        update:
+          notice: 'Application updated.'
+      authorized_applications:
+        destroy:
+          notice: 'Application revoked.'
+
+    layouts:
+      admin:
+        nav:
+          oauth2_provider: 'OAuth2 Provider'
+          applications: 'Applications'
+      application:
+        title: 'OAuth authorization required'

config/routes.rb

@@ -10,6 +10,10 @@
 
   scope '/:foodcoop' do
 
+    use_doorkeeper do
+      skip_controllers :applications, :authorized_applications
+    end
+
     # Root path
     root to: 'home#index'
 
@@ -190,6 +194,14 @@
       end
     end
 
+    ############## API
+
+    namespace :api do
+      namespace :v1 do
+        resources :financial_transactions, only: [:index, :show]
+      end
+    end
+
     ############## Feedback
 
     resource :feedback, only: [:new, :create], controller: 'feedback'

db/migrate/20160309153440_create_doorkeeper_tables.rb

@@ -0,0 +1,42 @@
+class CreateDoorkeeperTables < ActiveRecord::Migration
+  def change
+    create_table :oauth_applications do |t|
+      t.string  :name,         null: false
+      t.string  :uid,          null: false
+      t.string  :secret,       null: false
+      t.text    :redirect_uri, null: false
+      t.string  :scopes,       null: false, default: ''
+      t.timestamps
+    end
+
+    add_index :oauth_applications, :uid, unique: true
+
+    create_table :oauth_access_grants do |t|
+      t.integer  :resource_owner_id, null: false
+      t.integer  :application_id,    null: false
+      t.string   :token,             null: false
+      t.integer  :expires_in,        null: false
+      t.text     :redirect_uri,      null: false
+      t.datetime :created_at,        null: false
+      t.datetime :revoked_at
+      t.string   :scopes
+    end
+
+    add_index :oauth_access_grants, :token, unique: true
+
+    create_table :oauth_access_tokens do |t|
+      t.integer  :resource_owner_id
+      t.integer  :application_id
+      t.string   :token,             null: false
+      t.string   :refresh_token
+      t.integer  :expires_in
+      t.datetime :revoked_at
+      t.datetime :created_at,        null: false
+      t.string   :scopes
+    end
+
+    add_index :oauth_access_tokens, :token, unique: true
+    add_index :oauth_access_tokens, :resource_owner_id
+    add_index :oauth_access_tokens, :refresh_token, unique: true
+  end
+end