AsyncPipe; table schemata; migrations; File logging

src/orm/migrations/events/MigrationEvent.ts

@@ -0,0 +1,49 @@
+import {Event} from '../../../event/Event'
+import {Migration} from '../Migration'
+import {Inject, Injectable} from '../../../di'
+import {Migrations} from '../../services/Migrations'
+import {ErrorWithContext} from '../../../util'
+
+/**
+ * Generic base-class for migration-related events.
+ */
+@Injectable()
+export abstract class MigrationEvent extends Event {
+    @Inject()
+    protected readonly migrations!: Migrations
+
+    /** The migration relevant to this event. */
+    private internalMigration: Migration
+
+    /**
+     * Get the relevant migration.
+     */
+    public get migration(): Migration {
+        return this.internalMigration
+    }
+
+    constructor(
+        migration: Migration,
+    ) {
+        super()
+        this.internalMigration = migration
+    }
+
+    dehydrate(): {identifier: string} {
+        return {
+            identifier: this.migration.identifier,
+        }
+    }
+
+    rehydrate(state: {identifier: string}): void {
+        const migration = this.migrations.get(state.identifier)
+
+        if ( !migration ) {
+            throw new ErrorWithContext(`Unable to find migration with identifier: ${state.identifier}`, {
+                identifier: state.identifier,
+            })
+        }
+
+        this.internalMigration = migration
+    }
+}