Add notification data

storage-new/models/Notification.go

@@ -0,0 +1,41 @@
+package models
+
+import (
+	"database/sql"
+
+	"gorm.io/gen"
+	"gorm.io/gorm"
+)
+
+// Notifications inform users of inbound events
+// happening to their content
+type Notification struct {
+	gorm.Model
+	ForUser      User // The user the notification is for
+	ForUserId    string
+	SourceNote   *Note // The note where the notification originates from
+	SourceNoteId sql.NullString
+	SourceUser   *User // The user causing the notification
+	SourceUserId sql.NullString
+	Cause        NotificationCauseType   // What the cause of the notification is
+	ViewedState  NotificationViewedState // What the last known state of the notification is
+}
+
+type INotification interface {
+	// Update a given set of notifications to a given viewed state
+	//
+	// UPDATE @@table SET viewed_state = @state WHERE id IN @id
+	SetState(state NotificationViewedState, ids ...uint) error
+
+	// Get the lastest count amount of notifications with a given offset for a user
+	//
+	// SELECT * FROM @@table WHERE for_user_id = @id
+	// ORDER BY id DESC
+	// {{if count > 0 }}
+	//   LIMIT @count
+	// {{else}}
+	//   LIMIT 20
+	// {{end}}
+	// OFFSET @offset
+	GetLatestWithOffset(userId string, count uint, offset uint) ([]gen.T, error)
+}