chore: create notification model and schema

Author: Bulletdev

app/models/notification.rb

@@ -0,0 +1,36 @@
+class Notification < ApplicationRecord
+  # Associations
+  belongs_to :user
+
+  # Validations
+  validates :title, presence: true, length: { maximum: 200 }
+  validates :message, presence: true
+  validates :type, presence: true, inclusion: {
+    in: %w[info success warning error match schedule system],
+    message: "%{value} is not a valid notification type"
+  }
+
+  # Scopes
+  scope :unread, -> { where(is_read: false) }
+  scope :read, -> { where(is_read: true) }
+  scope :recent, -> { order(created_at: :desc) }
+  scope :by_type, ->(type) { where(type: type) }
+
+  # Callbacks
+  before_create :set_default_channels
+
+  # Instance methods
+  def mark_as_read!
+    update!(is_read: true, read_at: Time.current)
+  end
+
+  def unread?
+    !is_read
+  end
+
+  private
+
+  def set_default_channels
+    self.channels ||= ['in_app']
+  end
+end

app/models/user.rb

@@ -10,6 +10,7 @@ class User < ApplicationRecord
   has_many :created_vod_timestamps, class_name: 'VodTimestamp', foreign_key: 'created_by_id', dependent: :nullify
   has_many :assigned_goals, class_name: 'TeamGoal', foreign_key: 'assigned_to_id', dependent: :nullify
   has_many :created_goals, class_name: 'TeamGoal', foreign_key: 'created_by_id', dependent: :nullify
+  has_many :notifications, dependent: :destroy
   has_many :audit_logs, dependent: :destroy
 
   # Validations

db/migrate/20241001000014_create_notifications.rb

@@ -0,0 +1,40 @@
+class CreateNotifications < ActiveRecord::Migration[7.1]
+  def change
+    create_table :notifications, id: :uuid do |t|
+      t.references :user, type: :uuid, null: false, foreign_key: true
+
+      t.string :title, limit: 200, null: false
+      t.text :message, null: false
+      t.string :type, null: false
+
+      # Linking
+      t.text :link_url
+      t.string :link_type, limit: 20
+      t.uuid :link_id
+
+      # Status
+      t.boolean :is_read, default: false
+      t.timestamp :read_at
+
+      # Delivery channels
+      t.text :channels, array: true, default: ['in_app']
+      t.boolean :email_sent, default: false
+      t.boolean :discord_sent, default: false
+
+      t.jsonb :metadata, default: {}
+
+      t.timestamps null: false
+    end
+
+    add_index :notifications, :user_id
+    add_index :notifications, :is_read
+    add_index :notifications, :created_at, order: { created_at: :desc }
+
+    # Add check constraint for notification type
+    execute <<-SQL
+      ALTER TABLE notifications
+      ADD CONSTRAINT notifications_type_check
+      CHECK (type IN ('info', 'success', 'warning', 'error', 'match', 'schedule', 'system'));
+    SQL
+  end
+end