Merge pull request #329 from coopdevs/feature/device-tokens

Added the device_tokens endpoint

Author: enricostano

app/assets/javascripts/application.js.coffee

@@ -2,6 +2,7 @@
 #= require datepicker
 #= require give_time
 #= require tags
+#= require mobile_app_libs
 
 $(document).on 'click', 'a[data-popup]', (event) ->
   window.open($(this).attr('href'), 'popup', 'width=600,height=600')

app/assets/javascripts/mobile_app_libs.js

@@ -0,0 +1,5 @@
+// Used by the mobile app to register the device token
+// https://github.com/coopdevs/timeoverflow-mobile-app
+window.TimeOverflowRegisterExpoDeviceToken = function (token) {
+  $.post('/device_tokens', { token: token });
+}

app/controllers/device_tokens_controller.rb

@@ -0,0 +1,19 @@
+class DeviceTokensController < ApplicationController
+  before_filter :authenticate_user!
+
+  def create
+    @device_token = DeviceToken.new device_token_params.merge! user_id: current_user.id
+
+    if @device_token.save
+      render nothing: true, status: :created
+    else
+      render nothing: true, status: :unprocessable_entity
+    end
+  end
+
+  private
+
+  def device_token_params
+    params.permit(:token)
+  end
+end

app/models/device_token.rb

@@ -0,0 +1,7 @@
+class DeviceToken < ActiveRecord::Base
+  belongs_to :user
+
+  validates :user_id, presence: true
+  validates :token, presence: true
+  validates :token, uniqueness: { scope: :user_id }
+end

app/models/push_notifications/post_notification.rb

@@ -0,0 +1,11 @@
+module PushNotifications
+  class PostNotification
+    def title
+      "Notification title"
+    end
+
+    def body 
+      "Notification body"
+    end
+  end
+end

app/models/user.rb

@@ -22,6 +22,7 @@ class User < ActiveRecord::Base
   has_many :posts
   has_many :offers
   has_many :inquiries
+  has_many :device_tokens
 
   accepts_nested_attributes_for :members
 

app/services/push_notifications/expo_sender_service.rb

@@ -0,0 +1,30 @@
+require 'net/http'
+
+module PushNotifications
+  class ExpoAdaptorService
+    def initialize(notification, user)
+      @notification = notification
+      @user = user
+    end
+
+    def run
+      user.device_tokens.each do |device_token|
+        # https://docs.expo.io/versions/latest/guides/push-notifications.html
+        uri = URI('https://exp.host/--/api/v2/push/send')
+        Net::HTTP.post_form(uri, post_data(device_token.token))
+      end
+    end
+
+    private
+
+    attr_reader :notification, :user
+
+    def post_data(token)
+      {
+        "to" => token,
+        "title" => notification.title,
+        "body" => notification.body
+      }
+    end
+  end
+end

app/services/push_notifications/post_broadcaster_service.rb

@@ -0,0 +1,19 @@
+module PushNotifications
+  class UsersBroadcasterService
+    def initialize(users)
+      @users = users
+    end
+
+    def broadcast
+      notification = PostNotification.new
+
+      users.each do |user|
+        ExpoSenderService.new(notification, user).run
+      end
+    end
+
+    private
+
+    attr_reader :users
+  end
+end

config/routes.rb

@@ -20,6 +20,7 @@
   end
 
   resources :inquiries
+  resources :device_tokens, only: :create
 
   concern :accountable do
     get :give_time, on: :member

db/migrate/20180221161343_create_device_tokens.rb

@@ -0,0 +1,11 @@
+class CreateDeviceTokens < ActiveRecord::Migration
+  def change
+    create_table :device_tokens do |t|
+      t.integer :user_id, :null => false
+      t.string :token, :null => false
+
+      t.timestamps
+    end
+    add_index :device_tokens, [:user_id, :token], unique: true
+  end
+end