Feature: Twilio SMS Channel (#658)

Twilio SMS Channel
Fixes :  #350

db/migrate/20200330071706_create_channel_twilio_sms.rb

@@ -0,0 +1,11 @@
+class CreateChannelTwilioSms < ActiveRecord::Migration[6.0]
+  def change
+    create_table :channel_twilio_sms do |t|
+      t.string :phone_number, null: false
+      t.string :auth_token, null: false
+      t.string :account_sid, null: false
+      t.integer :account_id, null: false
+      t.timestamps
+    end
+  end
+end

db/migrate/20200404135009_add_unique_validation_index.rb

@@ -0,0 +1,7 @@
+class AddUniqueValidationIndex < ActiveRecord::Migration[6.0]
+  def change
+    add_index :channel_twitter_profiles, [:account_id, :profile_id], unique: true
+    add_index :channel_twilio_sms, [:account_id, :phone_number], unique: true
+    add_index :webhooks, [:account_id, :url], unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_03_31_095710) do
+ActiveRecord::Schema.define(version: 2020_04_04_135009) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -115,6 +115,16 @@ ActiveRecord::Schema.define(version: 2020_03_31_095710) do
     t.index ["page_id"], name: "index_channel_facebook_pages_on_page_id"
   end
 
+  create_table "channel_twilio_sms", force: :cascade do |t|
+    t.string "phone_number", null: false
+    t.string "auth_token", null: false
+    t.string "account_sid", null: false
+    t.integer "account_id", null: false
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["account_id", "phone_number"], name: "index_channel_twilio_sms_on_account_id_and_phone_number", unique: true
+  end
+
   create_table "channel_twitter_profiles", force: :cascade do |t|
     t.string "name"
     t.string "profile_id", null: false
@@ -123,6 +133,7 @@ ActiveRecord::Schema.define(version: 2020_03_31_095710) do
     t.integer "account_id", null: false
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.index ["account_id", "profile_id"], name: "index_channel_twitter_profiles_on_account_id_and_profile_id", unique: true
   end
 
   create_table "channel_web_widgets", id: :serial, force: :cascade do |t|
@@ -331,6 +342,7 @@ ActiveRecord::Schema.define(version: 2020_03_31_095710) do
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
     t.integer "webhook_type", default: 0
+    t.index ["account_id", "url"], name: "index_webhooks_on_account_id_and_url", unique: true
   end
 
   add_foreign_key "account_users", "accounts"