Make requests for money

app/assets/javascripts/requests.coffee

@@ -0,0 +1,3 @@
+# Place all the behaviors and hooks related to the matching controller here.
+# All this logic will automatically be available in application.js.
+# You can use CoffeeScript in this file: http://coffeescript.org/

app/assets/stylesheets/requests.scss

@@ -0,0 +1,3 @@
+// Place all the styles related to the requests controller here.
+// They will automatically be included in application.css.
+// You can use Sass (SCSS) here: http://sass-lang.com/

app/controllers/pages_controller.rb

@@ -5,5 +5,4 @@ class PagesController < ApplicationController
   def landing
     @statistics = Statistics.new
   end
-
 end

app/controllers/requests_controller.rb

@@ -0,0 +1,26 @@
+class RequestsController < ApplicationController
+  load_and_authorize_resource :user,    only: :index
+
+  before_action :load_request, only: [:confirm, :decline]
+  authorize_resource :request, only: [:confirm, :decline]
+
+  def index
+    @requests = User.find(params[:user_id]).incoming_requests.group_by(&:status)
+  end
+
+  def confirm
+    @request.confirm!
+    redirect_to user_requests_path(@request.debtor)
+  end
+
+  def decline
+    @request.decline!
+    redirect_to user_requests_path(@request.debtor)
+  end
+
+  private
+
+  def load_request
+    @request = Request.find params[:request_id]
+  end
+end

app/controllers/transactions_controller.rb

@@ -9,14 +9,23 @@ class TransactionsController < ApplicationController
   def create
     @transaction = Transaction.new(transaction_params)
     @transaction.reverse if @transaction.amount < 0
-    authorize!(:create, @transaction)
 
+    if can? :create, @transaction
       if @transaction.save
         render json: @transaction, status: :created
       else
         render json: @transaction.errors.full_messages,
           status: :unprocessable_entity
       end
+    else
+      request = Request.new @transaction.info
+      if request.save
+        render json: request, status: :created
+      else
+        render json: request.errors.full_messages,
+          status: :unprocessable_entity
+      end
+    end
   end
 
   private

app/helpers/requests_helper.rb

@@ -0,0 +1,2 @@
+module RequestsHelper
+end

app/models/request.rb

@@ -0,0 +1,33 @@
+class Request < ActiveRecord::Base
+  belongs_to :debtor,   class_name: 'User'
+  belongs_to :creditor, class_name: 'User'
+  belongs_to :issuer,   polymorphic: true
+
+  validates :amount, numericality: { greater_than: 0 }
+  validate  :different_debtor_creditor
+
+  enum status: [:open, :confirmed, :declined]
+
+  def confirm!
+    return unless open?
+
+    Transaction.create attributes.symbolize_keys.extract!(
+      :debtor_id, :creditor_id, :issuer_id, :issuer_type, :amount, :message
+    )
+    update_attributes status: :confirmed
+  end
+
+  def decline!
+    return unless open?
+
+    update_attributes status: :declined
+  end
+
+  private
+
+  def different_debtor_creditor
+    if self.debtor == self.creditor
+      self.errors.add :base, "Can't write money to yourself"
+    end
+  end
+end

app/models/transaction.rb

@@ -42,6 +42,10 @@ class Transaction < ActiveRecord::Base
     self.amount *= -1
   end
 
+  def info
+    attributes.symbolize_keys.extract!(:debtor_id, :creditor_id, :issuer_id, :issuer_type, :message, :amount)
+  end
+
   private
 
   def recalculate_balances

app/models/user.rb

@@ -18,6 +18,10 @@ class User < ActiveRecord::Base
     class_name: 'Transaction', foreign_key: 'creditor_id'
   has_many :outgoing_transactions,
     class_name: 'Transaction', foreign_key: 'debtor_id'
+  has_many :incoming_requests,
+    class_name: 'Request', foreign_key: 'debtor_id'
+  has_many :outgoing_requests,
+    class_name: 'Request', foreign_key: 'debtor_id'
 
   has_many :issued_transactions, as: :issuer, class_name: 'Transaction'
 

app/models/user_ability.rb

@@ -6,6 +6,7 @@ class UserAbility
 
     can :manage, :all if user.penning?
     can :read,   user, id: user.id
+    can :manage, Request, user_id: user.id
     can :create, Transaction do |t|
       t.debtor == user && t.amount <= Rails.application.config.maximum_amount
     end

app/views/layouts/application.html.haml

@@ -17,6 +17,8 @@
               - if current_user.penning
                 %li.pure-menu-item
                   =link_to "Zeus", User.zeus, class: "pure-menu-link"
+              %li.pure-menu-item
+                = link_to 'Requests', user_requests_path(current_user), class: 'pure-menu-link'
       .pure-u-1
         = render 'partials/flash'
         = yield

app/views/requests/_index.html.haml

@@ -0,0 +1,25 @@
+%h4= title
+%table.pure-table
+  %thead
+    %tr
+      %th Peer
+      %th Issuer
+      %th Amount
+      %th Message
+      - if actions
+        %th Accept
+        %th Decline
+  %tbody
+    - (requests || []).each do |r|
+      %tr
+        %td= r.creditor.name
+        %td= r.issuer.name
+        %td= "€#{r.amount/100.0}"
+        %td= r.message
+        - if actions
+          %td
+            = link_to request_confirm_path(r), method: :post do
+              %span.glyphicon.glyphicon-ok
+          %td
+            = link_to request_decline_path(r), method: :post do
+              %span.glyphicon.glyphicon-remove

app/views/requests/index.html.haml

@@ -0,0 +1,3 @@
+= render 'index', actions: true, title: 'Open Requests', requests: @requests['open']
+= render 'index', actions: false, title: 'Confirmed Requests', requests: @requests['confirmed'] 
+= render 'index', actions: false, title: 'Declined Requests', requests: @requests['declined']

app/views/transactions/_new.html.haml

@@ -13,7 +13,7 @@
     %span.input-group-addon
       %span.glyphicon.glyphicon-euro
     = f.number_field :euros, value: amount(@transaction.amount),
-        placeholder: "Amount", step: 0.01, min: (0.01 unless current_user.penning),
+        placeholder: "Amount", step: 0.01,
         class: "form-control", size: 20, required: true,
         max: (Rails.application.config.maximum_amount/100 unless current_user.penning)
   = f.submit "Send it!", class: "pure-button pure-button-primary btn"

config/routes.rb

@@ -6,7 +6,12 @@ Rails.application.routes.draw do
   root to: 'pages#landing'
 
   resources :transactions, only: [:index, :create]
-  resources :users, only: [:show, :index]
+  resources :users,        only: [:index, :show] do
+    resources :requests,     only: [:index], shallow: true do
+      post :confirm
+      post :decline
+    end
+  end
 
   get 'datatables/:id' => 'datatables#transactions_for_user', as: "user_transactions"
 end

db/migrate/20170109123717_create_requests.rb

@@ -0,0 +1,18 @@
+class CreateRequests < ActiveRecord::Migration
+  def change
+    create_table :requests do |t|
+      t.references :debtor,   index: true,       null: false
+      t.references :creditor, index: true,       null: false
+      t.references :issuer,   polymorphic: true, index: true, null: false
+      t.integer :amount, null: false, default: 0
+      t.string :message
+
+      t.integer :status, default: 0
+
+      t.timestamps null: false
+    end
+
+    add_foreign_key :request, :users, column: :creditor_id
+    add_foreign_key :request, :users, column: :debtor_id
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150914095049) do
+ActiveRecord::Schema.define(version: 20170109123717) do
 
   create_table "clients", force: :cascade do |t|
     t.string   "name",       null: false
@@ -23,6 +23,22 @@ ActiveRecord::Schema.define(version: 20150914095049) do
   add_index "clients", ["key"], name: "index_clients_on_key"
   add_index "clients", ["name"], name: "index_clients_on_name"
 
+  create_table "requests", force: :cascade do |t|
+    t.integer  "debtor_id",               null: false
+    t.integer  "creditor_id",             null: false
+    t.integer  "issuer_id",               null: false
+    t.string   "issuer_type",             null: false
+    t.integer  "amount",      default: 0, null: false
+    t.string   "message"
+    t.integer  "status",      default: 0
+    t.datetime "created_at",              null: false
+    t.datetime "updated_at",              null: false
+  end
+
+  add_index "requests", ["creditor_id"], name: "index_requests_on_creditor_id"
+  add_index "requests", ["debtor_id"], name: "index_requests_on_debtor_id"
+  add_index "requests", ["issuer_type", "issuer_id"], name: "index_requests_on_issuer_type_and_issuer_id"
+
   create_table "transactions", force: :cascade do |t|
     t.integer  "debtor_id",                null: false
     t.integer  "creditor_id",              null: false

spec/controllers/requests_controller_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe RequestsController, type: :controller do
+
+end

spec/factories/requests.rb

@@ -0,0 +1,6 @@
+FactoryGirl.define do
+  factory :request do
+    
+  end
+
+end

spec/helpers/requests_helper_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+# Specs in this file have access to a helper object that includes
+# the RequestsHelper. For example:
+#
+# describe RequestsHelper do
+#   describe "string concat" do
+#     it "concats two strings with spaces" do
+#       expect(helper.concat_strings("this","that")).to eq("this that")
+#     end
+#   end
+# end
+RSpec.describe RequestsHelper, type: :helper do
+  pending "add some examples to (or delete) #{__FILE__}"
+end

spec/models/request_spec.rb

@@ -0,0 +1,5 @@
+require 'rails_helper'
+
+RSpec.describe Request, type: :model do
+  pending "add some examples to (or delete) #{__FILE__}"
+end