feat: Initial clean release of CHM

packages/lib/models/Migration.ts

@@ -0,0 +1,37 @@
+import BaseModel from '../BaseModel';
+import migration20 from '../migrations/20';
+import migration27 from '../migrations/27';
+import migration33 from '../migrations/33';
+import migration35 from '../migrations/35';
+import migration42 from '../migrations/42';
+
+interface MigrationScript {
+	exec: ()=> Promise<void>;
+}
+
+const migrationScripts: Record<number, MigrationScript> = {
+	20: migration20,
+	27: migration27,
+	33: migration33,
+	35: migration35,
+	42: migration42,
+};
+
+export default class Migration extends BaseModel {
+	public static tableName() {
+		return 'migrations';
+	}
+
+	public static modelType() {
+		return BaseModel.TYPE_MIGRATION;
+	}
+
+	public static migrationsToDo() {
+		return this.modelSelectAll('SELECT * FROM migrations ORDER BY number ASC');
+	}
+
+	public static script(number: number) {
+		if (!migrationScripts[number]) throw new Error('Migration script has not been added to "migrationScripts" array');
+		return migrationScripts[number];
+	}
+}