Feature: Add web push notification permission in frontend (#766)

Add webpush notification permission in frontend

Co-authored-by: Sojan <sojan@pepalo.com>

db/migrate/20200504144712_add_index_on_notification_subscriptions.rb

@@ -0,0 +1,6 @@
+class AddIndexOnNotificationSubscriptions < ActiveRecord::Migration[6.0]
+  def change
+    add_column :notification_subscriptions, :identifier, :string
+    add_index :notification_subscriptions, :identifier, 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_05_03_151130) do
+ActiveRecord::Schema.define(version: 2020_05_04_144712) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pgcrypto"
@@ -284,6 +284,8 @@ ActiveRecord::Schema.define(version: 2020_05_03_151130) do
     t.jsonb "subscription_attributes", default: "{}", null: false
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.string "identifier"
+    t.index ["identifier"], name: "index_notification_subscriptions_on_identifier", unique: true
     t.index ["user_id"], name: "index_notification_subscriptions_on_user_id"
   end
 
@@ -316,6 +318,20 @@ ActiveRecord::Schema.define(version: 2020_05_03_151130) do
     t.boolean "payment_source_added", default: false
   end
 
+  create_table "super_admins", force: :cascade do |t|
+    t.string "email", default: "", null: false
+    t.string "encrypted_password", default: "", null: false
+    t.datetime "remember_created_at"
+    t.integer "sign_in_count", default: 0, null: false
+    t.datetime "current_sign_in_at"
+    t.datetime "last_sign_in_at"
+    t.inet "current_sign_in_ip"
+    t.inet "last_sign_in_ip"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+    t.index ["email"], name: "index_super_admins_on_email", unique: true
+  end
+
   create_table "taggings", id: :serial, force: :cascade do |t|
     t.integer "tag_id"
     t.string "taggable_type"