/**
* SchemaChangedEvent Domain Event
*
* Represents an event that occurs when database schema has been changed.
* Contains information about the type of change and affected objects.
*/
export class SchemaChangedEvent {
constructor(
readonly databaseName: string,
readonly changeType: 'CREATE' | 'ALTER' | 'DROP',
readonly objectType: 'TABLE' | 'VIEW' | 'PROCEDURE' | 'FUNCTION' | 'INDEX' | 'CONSTRAINT',
readonly objectName: string,
readonly sql?: string,
readonly timestamp: Date = new Date()
) {}
/**
* Checks if the change is a structural change (table/view creation or deletion)
* @returns boolean indicating if it's a structural change
*/
isStructuralChange(): boolean {
return (
(this.objectType === 'TABLE' || this.objectType === 'VIEW') &&
(this.changeType === 'CREATE' || this.changeType === 'DROP')
);
}
/**
* Creates a summary of the schema change event.
* @returns Summary string
*/
getSummary(): string {
return `${this.changeType} ${this.objectType} ${this.objectName} in ${this.databaseName}`;
}
}
