Initial commit - Event Planner application

node_modules/kysely/dist/esm/migration/file-migration-provider.d.ts

@@ -0,0 +1,48 @@
+import type { Migration, MigrationProvider } from './migrator.js';
+/**
+ * Reads all migrations from a folder in node.js.
+ *
+ * ### Examples
+ *
+ * ```ts
+ * import { promises as fs } from 'node:fs'
+ * import path from 'node:path'
+ *
+ * new FileMigrationProvider({
+ *   fs,
+ *   path,
+ *   migrationFolder: 'path/to/migrations/folder'
+ * })
+ * ```
+ */
+export declare class FileMigrationProvider implements MigrationProvider {
+    #private;
+    constructor(props: FileMigrationProviderProps);
+    /**
+     * Returns all migrations, old and new.
+     *
+     * For example if you have your migrations in a folder as separate files,
+     * you can implement this method to return all migration in that folder
+     * as {@link Migration} objects.
+     *
+     * Kysely already has a built-in {@link FileMigrationProvider} for node.js
+     * that does exactly that.
+     *
+     * The keys of the returned object are migration names and values are the
+     * migrations. The order of the migrations is determined by the alphabetical
+     * order of the migration names. The items in the object don't need to be
+     * sorted, they are sorted by Kysely.
+     */
+    getMigrations(): Promise<Record<string, Migration>>;
+}
+export interface FileMigrationProviderFS {
+    readdir(path: string): Promise<string[]>;
+}
+export interface FileMigrationProviderPath {
+    join(...path: string[]): string;
+}
+export interface FileMigrationProviderProps {
+    fs: FileMigrationProviderFS;
+    path: FileMigrationProviderPath;
+    migrationFolder: string;
+}

node_modules/kysely/dist/esm/migration/file-migration-provider.js

@@ -0,0 +1,49 @@
+/// <reference types="./file-migration-provider.d.ts" />
+import { isFunction, isObject } from '../util/object-utils.js';
+/**
+ * Reads all migrations from a folder in node.js.
+ *
+ * ### Examples
+ *
+ * ```ts
+ * import { promises as fs } from 'node:fs'
+ * import path from 'node:path'
+ *
+ * new FileMigrationProvider({
+ *   fs,
+ *   path,
+ *   migrationFolder: 'path/to/migrations/folder'
+ * })
+ * ```
+ */
+export class FileMigrationProvider {
+    #props;
+    constructor(props) {
+        this.#props = props;
+    }
+    async getMigrations() {
+        const migrations = {};
+        const files = await this.#props.fs.readdir(this.#props.migrationFolder);
+        for (const fileName of files) {
+            if (fileName.endsWith('.js') ||
+                (fileName.endsWith('.ts') && !fileName.endsWith('.d.ts')) ||
+                fileName.endsWith('.mjs') ||
+                (fileName.endsWith('.mts') && !fileName.endsWith('.d.mts'))) {
+                const migration = await import(
+                /* webpackIgnore: true */ this.#props.path.join(this.#props.migrationFolder, fileName));
+                const migrationKey = fileName.substring(0, fileName.lastIndexOf('.'));
+                // Handle esModuleInterop export's `default` prop...
+                if (isMigration(migration?.default)) {
+                    migrations[migrationKey] = migration.default;
+                }
+                else if (isMigration(migration)) {
+                    migrations[migrationKey] = migration;
+                }
+            }
+        }
+        return migrations;
+    }
+}
+function isMigration(obj) {
+    return isObject(obj) && isFunction(obj.up);
+}

node_modules/kysely/dist/esm/migration/migrator.d.ts

@@ -0,0 +1,395 @@
+import type { Kysely } from '../kysely.js';
+export declare const DEFAULT_MIGRATION_TABLE = "kysely_migration";
+export declare const DEFAULT_MIGRATION_LOCK_TABLE = "kysely_migration_lock";
+export declare const DEFAULT_ALLOW_UNORDERED_MIGRATIONS = false;
+export declare const MIGRATION_LOCK_ID = "migration_lock";
+export declare const NO_MIGRATIONS: NoMigrations;
+export interface Migration {
+    up(db: Kysely<any>): Promise<void>;
+    /**
+     * An optional down method.
+     *
+     * If you don't provide a down method, the migration is skipped when
+     * migrating down.
+     */
+    down?(db: Kysely<any>): Promise<void>;
+}
+/**
+ * A class for running migrations.
+ *
+ * ### Example
+ *
+ * This example uses the {@link FileMigrationProvider} that reads migrations
+ * files from a single folder. You can easily implement your own
+ * {@link MigrationProvider} if you want to provide migrations some
+ * other way.
+ *
+ * ```ts
+ * import { promises as fs } from 'node:fs'
+ * import path from 'node:path'
+ * import * as Sqlite from 'better-sqlite3'
+ * import {
+ *   FileMigrationProvider,
+ *   Kysely,
+ *   Migrator,
+ *   SqliteDialect
+ * } from 'kysely'
+ *
+ * const db = new Kysely<any>({
+ *   dialect: new SqliteDialect({
+ *     database: Sqlite(':memory:')
+ *   })
+ * })
+ *
+ * const migrator = new Migrator({
+ *   db,
+ *   provider: new FileMigrationProvider({
+ *     fs,
+ *     // Path to the folder that contains all your migrations.
+ *     migrationFolder: 'some/path/to/migrations',
+ *     path,
+ *   })
+ * })
+ * ```
+ */
+export declare class Migrator {
+    #private;
+    constructor(props: MigratorProps);
+    /**
+     * Returns a {@link MigrationInfo} object for each migration.
+     *
+     * The returned array is sorted by migration name.
+     */
+    getMigrations(): Promise<ReadonlyArray<MigrationInfo>>;
+    /**
+     * Runs all migrations that have not yet been run.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed. See the examples below.
+     *
+     * This method goes through all possible migrations provided by the provider and runs the
+     * ones whose names come alphabetically after the last migration that has been run. If the
+     * list of executed migrations doesn't match the beginning of the list of possible migrations
+     * an error is returned.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import * as Sqlite from 'better-sqlite3'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * const { error, results } = await migrator.migrateToLatest()
+     *
+     * results?.forEach((it) => {
+     *   if (it.status === 'Success') {
+     *     console.log(`migration "${it.migrationName}" was executed successfully`)
+     *   } else if (it.status === 'Error') {
+     *     console.error(`failed to execute migration "${it.migrationName}"`)
+     *   }
+     * })
+     *
+     * if (error) {
+     *   console.error('failed to run `migrateToLatest`')
+     *   console.error(error)
+     * }
+     * ```
+     */
+    migrateToLatest(): Promise<MigrationResultSet>;
+    /**
+     * Migrate up/down to a specific migration.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateTo('some_migration')
+     * ```
+     *
+     * If you specify the name of the first migration, this method migrates
+     * down to the first migration, but doesn't run the `down` method of
+     * the first migration. In case you want to migrate all the way down,
+     * you can use a special constant `NO_MIGRATIONS`:
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator, NO_MIGRATIONS } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateTo(NO_MIGRATIONS)
+     * ```
+     */
+    migrateTo(targetMigrationName: string | NoMigrations): Promise<MigrationResultSet>;
+    /**
+     * Migrate one step up.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateUp()
+     * ```
+     */
+    migrateUp(): Promise<MigrationResultSet>;
+    /**
+     * Migrate one step down.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateDown()
+     * ```
+     */
+    migrateDown(): Promise<MigrationResultSet>;
+}
+export interface MigratorProps {
+    readonly db: Kysely<any>;
+    readonly provider: MigrationProvider;
+    /**
+     * The name of the internal migration table. Defaults to `kysely_migration`.
+     *
+     * If you do specify this, you need to ALWAYS use the same value. Kysely doesn't
+     * support changing the table on the fly. If you run the migrator even once with a
+     * table name X and then change the table name to Y, kysely will create a new empty
+     * migration table and attempt to run the migrations again, which will obviously
+     * fail.
+     *
+     * If you do specify this, ALWAYS ALWAYS use the same value from the beginning of
+     * the project, to the end of time or prepare to manually migrate the migration
+     * tables.
+     */
+    readonly migrationTableName?: string;
+    /**
+     * The name of the internal migration lock table. Defaults to `kysely_migration_lock`.
+     *
+     * If you do specify this, you need to ALWAYS use the same value. Kysely doesn't
+     * support changing the table on the fly. If you run the migrator even once with a
+     * table name X and then change the table name to Y, kysely will create a new empty
+     * lock table.
+     *
+     * If you do specify this, ALWAYS ALWAYS use the same value from the beginning of
+     * the project, to the end of time or prepare to manually migrate the migration
+     * tables.
+     */
+    readonly migrationLockTableName?: string;
+    /**
+     * The schema of the internal migration tables. Defaults to the default schema
+     * on dialects that support schemas.
+     *
+     * If you do specify this, you need to ALWAYS use the same value. Kysely doesn't
+     * support changing the schema on the fly. If you run the migrator even once with a
+     * schema name X and then change the schema name to Y, kysely will create a new empty
+     * migration tables in the new schema and attempt to run the migrations again, which
+     * will obviously fail.
+     *
+     * If you do specify this, ALWAYS ALWAYS use the same value from the beginning of
+     * the project, to the end of time or prepare to manually migrate the migration
+     * tables.
+     *
+     * This only works on postgres and mssql.
+     */
+    readonly migrationTableSchema?: string;
+    /**
+     * Enforces whether or not migrations must be run in alpha-numeric order.
+     *
+     * When false, migrations must be run in their exact alpha-numeric order.
+     * This is checked against the migrations already run in the database
+     * (`migrationTableName`). This ensures your migrations are always run in
+     * the same order and is the safest option.
+     *
+     * When true, migrations are still run in alpha-numeric order, but
+     * the order is not checked against already-run migrations in the database.
+     * Kysely will simply run all migrations that haven't run yet, in alpha-numeric
+     * order.
+     */
+    readonly allowUnorderedMigrations?: boolean;
+    /**
+     * A function that compares migration names, used when sorting migrations in
+     * ascending order.
+     *
+     * Default is `name0.localeCompare(name1)`.
+     */
+    readonly nameComparator?: (name0: string, name1: string) => number;
+    /**
+     * When `true`, don't run migrations in transactions even if the dialect supports transactional DDL.
+     *
+     * Default is `false`.
+     *
+     * This is useful when some migrations include queries that would fail otherwise.
+     */
+    readonly disableTransactions?: boolean;
+}
+/**
+ * All migration methods ({@link Migrator.migrateTo | migrateTo},
+ * {@link Migrator.migrateToLatest | migrateToLatest} etc.) never
+ * throw but return this object instead.
+ */
+export interface MigrationResultSet {
+    /**
+     * This is defined if something went wrong.
+     *
+     * An error may have occurred in one of the migrations in which case the
+     * {@link results} list contains an item with `status === 'Error'` to
+     * indicate which migration failed.
+     *
+     * An error may also have occurred before Kysely was able to figure out
+     * which migrations should be executed, in which case the {@link results}
+     * list is undefined.
+     */
+    readonly error?: unknown;
+    /**
+     * {@link MigrationResult} for each individual migration that was supposed
+     * to be executed by the operation.
+     *
+     * If all went well, each result's `status` is `Success`. If some migration
+     * failed, the failed migration's result's `status` is `Error` and all
+     * results after that one have `status` ´NotExecuted`.
+     *
+     * This property can be undefined if an error occurred before Kysely was
+     * able to figure out which migrations should be executed.
+     *
+     * If this list is empty, there were no migrations to execute.
+     */
+    readonly results?: MigrationResult[];
+}
+type MigrationDirection = 'Up' | 'Down';
+export interface MigrationResult {
+    readonly migrationName: string;
+    /**
+     * The direction in which this migration was executed.
+     */
+    readonly direction: MigrationDirection;
+    /**
+     * The execution status.
+     *
+     *  - `Success` means the migration was successfully executed. Note that
+     *    if any of the later migrations in the {@link MigrationResultSet.results}
+     *    list failed (have status `Error`) AND the dialect supports transactional
+     *    DDL, even the successfull migrations were rolled back.
+     *
+     *  - `Error` means the migration failed. In this case the
+     *    {@link MigrationResultSet.error} contains the error.
+     *
+     *  - `NotExecuted` means that the migration was supposed to be executed
+     *    but wasn't because an earlier migration failed.
+     */
+    readonly status: 'Success' | 'Error' | 'NotExecuted';
+}
+export interface MigrationProvider {
+    /**
+     * Returns all migrations, old and new.
+     *
+     * For example if you have your migrations in a folder as separate files,
+     * you can implement this method to return all migration in that folder
+     * as {@link Migration} objects.
+     *
+     * Kysely already has a built-in {@link FileMigrationProvider} for node.js
+     * that does exactly that.
+     *
+     * The keys of the returned object are migration names and values are the
+     * migrations. The order of the migrations is determined by the alphabetical
+     * order of the migration names. The items in the object don't need to be
+     * sorted, they are sorted by Kysely.
+     */
+    getMigrations(): Promise<Record<string, Migration>>;
+}
+/**
+ * Type for the {@link NO_MIGRATIONS} constant. Never create one of these.
+ */
+export interface NoMigrations {
+    readonly __noMigrations__: true;
+}
+export interface MigrationInfo {
+    /**
+     * Name of the migration.
+     */
+    name: string;
+    /**
+     * The actual migration.
+     */
+    migration: Migration;
+    /**
+     * When was the migration executed.
+     *
+     * If this is undefined, the migration hasn't been executed yet.
+     */
+    executedAt?: Date;
+}
+export {};

node_modules/kysely/dist/esm/migration/migrator.js

@@ -0,0 +1,608 @@
+/// <reference types="./migrator.d.ts" />
+import { NoopPlugin } from '../plugin/noop-plugin.js';
+import { WithSchemaPlugin } from '../plugin/with-schema/with-schema-plugin.js';
+import { freeze, getLast, isObject } from '../util/object-utils.js';
+export const DEFAULT_MIGRATION_TABLE = 'kysely_migration';
+export const DEFAULT_MIGRATION_LOCK_TABLE = 'kysely_migration_lock';
+export const DEFAULT_ALLOW_UNORDERED_MIGRATIONS = false;
+export const MIGRATION_LOCK_ID = 'migration_lock';
+export const NO_MIGRATIONS = freeze({ __noMigrations__: true });
+/**
+ * A class for running migrations.
+ *
+ * ### Example
+ *
+ * This example uses the {@link FileMigrationProvider} that reads migrations
+ * files from a single folder. You can easily implement your own
+ * {@link MigrationProvider} if you want to provide migrations some
+ * other way.
+ *
+ * ```ts
+ * import { promises as fs } from 'node:fs'
+ * import path from 'node:path'
+ * import * as Sqlite from 'better-sqlite3'
+ * import {
+ *   FileMigrationProvider,
+ *   Kysely,
+ *   Migrator,
+ *   SqliteDialect
+ * } from 'kysely'
+ *
+ * const db = new Kysely<any>({
+ *   dialect: new SqliteDialect({
+ *     database: Sqlite(':memory:')
+ *   })
+ * })
+ *
+ * const migrator = new Migrator({
+ *   db,
+ *   provider: new FileMigrationProvider({
+ *     fs,
+ *     // Path to the folder that contains all your migrations.
+ *     migrationFolder: 'some/path/to/migrations',
+ *     path,
+ *   })
+ * })
+ * ```
+ */
+export class Migrator {
+    #props;
+    constructor(props) {
+        this.#props = freeze(props);
+    }
+    /**
+     * Returns a {@link MigrationInfo} object for each migration.
+     *
+     * The returned array is sorted by migration name.
+     */
+    async getMigrations() {
+        const tableExists = await this.#doesTableExist(this.#migrationTable);
+        const executedMigrations = tableExists
+            ? await this.#props.db
+                .withPlugin(this.#schemaPlugin)
+                .selectFrom(this.#migrationTable)
+                .select(['name', 'timestamp'])
+                .$narrowType()
+                .execute()
+            : [];
+        const migrations = await this.#resolveMigrations();
+        return migrations.map(({ name, ...migration }) => {
+            const executed = executedMigrations.find((it) => it.name === name);
+            return {
+                name,
+                migration,
+                executedAt: executed ? new Date(executed.timestamp) : undefined,
+            };
+        });
+    }
+    /**
+     * Runs all migrations that have not yet been run.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed. See the examples below.
+     *
+     * This method goes through all possible migrations provided by the provider and runs the
+     * ones whose names come alphabetically after the last migration that has been run. If the
+     * list of executed migrations doesn't match the beginning of the list of possible migrations
+     * an error is returned.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import * as Sqlite from 'better-sqlite3'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * const { error, results } = await migrator.migrateToLatest()
+     *
+     * results?.forEach((it) => {
+     *   if (it.status === 'Success') {
+     *     console.log(`migration "${it.migrationName}" was executed successfully`)
+     *   } else if (it.status === 'Error') {
+     *     console.error(`failed to execute migration "${it.migrationName}"`)
+     *   }
+     * })
+     *
+     * if (error) {
+     *   console.error('failed to run `migrateToLatest`')
+     *   console.error(error)
+     * }
+     * ```
+     */
+    async migrateToLatest() {
+        return this.#migrate(() => ({ direction: 'Up', step: Infinity }));
+    }
+    /**
+     * Migrate up/down to a specific migration.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateTo('some_migration')
+     * ```
+     *
+     * If you specify the name of the first migration, this method migrates
+     * down to the first migration, but doesn't run the `down` method of
+     * the first migration. In case you want to migrate all the way down,
+     * you can use a special constant `NO_MIGRATIONS`:
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator, NO_MIGRATIONS } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateTo(NO_MIGRATIONS)
+     * ```
+     */
+    async migrateTo(targetMigrationName) {
+        return this.#migrate(({ migrations, executedMigrations, pendingMigrations, }) => {
+            if (isObject(targetMigrationName) &&
+                targetMigrationName.__noMigrations__ === true) {
+                return { direction: 'Down', step: Infinity };
+            }
+            if (!migrations.find((m) => m.name === targetMigrationName)) {
+                throw new Error(`migration "${targetMigrationName}" doesn't exist`);
+            }
+            const executedIndex = executedMigrations.indexOf(targetMigrationName);
+            const pendingIndex = pendingMigrations.findIndex((m) => m.name === targetMigrationName);
+            if (executedIndex !== -1) {
+                return {
+                    direction: 'Down',
+                    step: executedMigrations.length - executedIndex - 1,
+                };
+            }
+            else if (pendingIndex !== -1) {
+                return { direction: 'Up', step: pendingIndex + 1 };
+            }
+            else {
+                throw new Error(`migration "${targetMigrationName}" isn't executed or pending`);
+            }
+        });
+    }
+    /**
+     * Migrate one step up.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateUp()
+     * ```
+     */
+    async migrateUp() {
+        return this.#migrate(() => ({ direction: 'Up', step: 1 }));
+    }
+    /**
+     * Migrate one step down.
+     *
+     * This method returns a {@link MigrationResultSet} instance and _never_ throws.
+     * {@link MigrationResultSet.error} holds the error if something went wrong.
+     * {@link MigrationResultSet.results} contains information about which migrations
+     * were executed and which failed.
+     *
+     * ### Examples
+     *
+     * ```ts
+     * import { promises as fs } from 'node:fs'
+     * import path from 'node:path'
+     * import { FileMigrationProvider, Migrator } from 'kysely'
+     *
+     * const migrator = new Migrator({
+     *   db,
+     *   provider: new FileMigrationProvider({
+     *     fs,
+     *     // Path to the folder that contains all your migrations.
+     *     migrationFolder: 'some/path/to/migrations',
+     *     path,
+     *   })
+     * })
+     *
+     * await migrator.migrateDown()
+     * ```
+     */
+    async migrateDown() {
+        return this.#migrate(() => ({ direction: 'Down', step: 1 }));
+    }
+    async #migrate(getMigrationDirectionAndStep) {
+        try {
+            await this.#ensureMigrationTableSchemaExists();
+            await this.#ensureMigrationTableExists();
+            await this.#ensureMigrationLockTableExists();
+            await this.#ensureLockRowExists();
+            return await this.#runMigrations(getMigrationDirectionAndStep);
+        }
+        catch (error) {
+            if (error instanceof MigrationResultSetError) {
+                return error.resultSet;
+            }
+            return { error };
+        }
+    }
+    get #migrationTableSchema() {
+        return this.#props.migrationTableSchema;
+    }
+    get #migrationTable() {
+        return this.#props.migrationTableName ?? DEFAULT_MIGRATION_TABLE;
+    }
+    get #migrationLockTable() {
+        return this.#props.migrationLockTableName ?? DEFAULT_MIGRATION_LOCK_TABLE;
+    }
+    get #allowUnorderedMigrations() {
+        return (this.#props.allowUnorderedMigrations ?? DEFAULT_ALLOW_UNORDERED_MIGRATIONS);
+    }
+    get #schemaPlugin() {
+        if (this.#migrationTableSchema) {
+            return new WithSchemaPlugin(this.#migrationTableSchema);
+        }
+        return new NoopPlugin();
+    }
+    async #ensureMigrationTableSchemaExists() {
+        if (!this.#migrationTableSchema) {
+            // Use default schema. Nothing to do.
+            return;
+        }
+        const schemaExists = await this.#doesSchemaExist();
+        if (schemaExists) {
+            return;
+        }
+        try {
+            await this.#createIfNotExists(this.#props.db.schema.createSchema(this.#migrationTableSchema));
+        }
+        catch (error) {
+            const schemaExists = await this.#doesSchemaExist();
+            // At least on PostgreSQL, `if not exists` doesn't guarantee the `create schema`
+            // query doesn't throw if the schema already exits. That's why we check if
+            // the schema exist here and ignore the error if it does.
+            if (!schemaExists) {
+                throw error;
+            }
+        }
+    }
+    async #ensureMigrationTableExists() {
+        const tableExists = await this.#doesTableExist(this.#migrationTable);
+        if (tableExists) {
+            return;
+        }
+        try {
+            await this.#createIfNotExists(this.#props.db.schema
+                .withPlugin(this.#schemaPlugin)
+                .createTable(this.#migrationTable)
+                .addColumn('name', 'varchar(255)', (col) => col.notNull().primaryKey())
+                // The migration run time as ISO string. This is not a real date type as we
+                // can't know which data type is supported by all future dialects.
+                .addColumn('timestamp', 'varchar(255)', (col) => col.notNull()));
+        }
+        catch (error) {
+            const tableExists = await this.#doesTableExist(this.#migrationTable);
+            // At least on PostgreSQL, `if not exists` doesn't guarantee the `create table`
+            // query doesn't throw if the table already exits. That's why we check if
+            // the table exist here and ignore the error if it does.
+            if (!tableExists) {
+                throw error;
+            }
+        }
+    }
+    async #ensureMigrationLockTableExists() {
+        const tableExists = await this.#doesTableExist(this.#migrationLockTable);
+        if (tableExists) {
+            return;
+        }
+        try {
+            await this.#createIfNotExists(this.#props.db.schema
+                .withPlugin(this.#schemaPlugin)
+                .createTable(this.#migrationLockTable)
+                .addColumn('id', 'varchar(255)', (col) => col.notNull().primaryKey())
+                .addColumn('is_locked', 'integer', (col) => col.notNull().defaultTo(0)));
+        }
+        catch (error) {
+            const tableExists = await this.#doesTableExist(this.#migrationLockTable);
+            // At least on PostgreSQL, `if not exists` doesn't guarantee the `create table`
+            // query doesn't throw if the table already exits. That's why we check if
+            // the table exist here and ignore the error if it does.
+            if (!tableExists) {
+                throw error;
+            }
+        }
+    }
+    async #ensureLockRowExists() {
+        const lockRowExists = await this.#doesLockRowExists();
+        if (lockRowExists) {
+            return;
+        }
+        try {
+            await this.#props.db
+                .withPlugin(this.#schemaPlugin)
+                .insertInto(this.#migrationLockTable)
+                .values({ id: MIGRATION_LOCK_ID, is_locked: 0 })
+                .execute();
+        }
+        catch (error) {
+            const lockRowExists = await this.#doesLockRowExists();
+            if (!lockRowExists) {
+                throw error;
+            }
+        }
+    }
+    async #doesSchemaExist() {
+        const schemas = await this.#props.db.introspection.getSchemas();
+        return schemas.some((it) => it.name === this.#migrationTableSchema);
+    }
+    async #doesTableExist(tableName) {
+        const schema = this.#migrationTableSchema;
+        const tables = await this.#props.db.introspection.getTables({
+            withInternalKyselyTables: true,
+        });
+        return tables.some((it) => it.name === tableName && (!schema || it.schema === schema));
+    }
+    async #doesLockRowExists() {
+        const lockRow = await this.#props.db
+            .withPlugin(this.#schemaPlugin)
+            .selectFrom(this.#migrationLockTable)
+            .where('id', '=', MIGRATION_LOCK_ID)
+            .select('id')
+            .executeTakeFirst();
+        return !!lockRow;
+    }
+    async #runMigrations(getMigrationDirectionAndStep) {
+        const adapter = this.#props.db.getExecutor().adapter;
+        const lockOptions = freeze({
+            lockTable: this.#props.migrationLockTableName ?? DEFAULT_MIGRATION_LOCK_TABLE,
+            lockRowId: MIGRATION_LOCK_ID,
+            lockTableSchema: this.#props.migrationTableSchema,
+        });
+        const run = async (db) => {
+            try {
+                await adapter.acquireMigrationLock(db, lockOptions);
+                const state = await this.#getState(db);
+                if (state.migrations.length === 0) {
+                    return { results: [] };
+                }
+                const { direction, step } = getMigrationDirectionAndStep(state);
+                if (step <= 0) {
+                    return { results: [] };
+                }
+                if (direction === 'Down') {
+                    return await this.#migrateDown(db, state, step);
+                }
+                else if (direction === 'Up') {
+                    return await this.#migrateUp(db, state, step);
+                }
+                return { results: [] };
+            }
+            finally {
+                await adapter.releaseMigrationLock(db, lockOptions);
+            }
+        };
+        if (adapter.supportsTransactionalDdl && !this.#props.disableTransactions) {
+            return this.#props.db.transaction().execute(run);
+        }
+        else {
+            return this.#props.db.connection().execute(run);
+        }
+    }
+    async #getState(db) {
+        const migrations = await this.#resolveMigrations();
+        const executedMigrations = await this.#getExecutedMigrations(db);
+        this.#ensureNoMissingMigrations(migrations, executedMigrations);
+        if (!this.#allowUnorderedMigrations) {
+            this.#ensureMigrationsInOrder(migrations, executedMigrations);
+        }
+        const pendingMigrations = this.#getPendingMigrations(migrations, executedMigrations);
+        return freeze({
+            migrations,
+            executedMigrations,
+            lastMigration: getLast(executedMigrations),
+            pendingMigrations,
+        });
+    }
+    #getPendingMigrations(migrations, executedMigrations) {
+        return migrations.filter((migration) => {
+            return !executedMigrations.includes(migration.name);
+        });
+    }
+    async #resolveMigrations() {
+        const allMigrations = await this.#props.provider.getMigrations();
+        return Object.keys(allMigrations)
+            .sort()
+            .map((name) => ({
+            ...allMigrations[name],
+            name,
+        }));
+    }
+    async #getExecutedMigrations(db) {
+        const executedMigrations = await db
+            .withPlugin(this.#schemaPlugin)
+            .selectFrom(this.#migrationTable)
+            .select(['name', 'timestamp'])
+            .$narrowType()
+            .execute();
+        const nameComparator = this.#props.nameComparator || ((a, b) => a.localeCompare(b));
+        return (executedMigrations
+            // https://github.com/kysely-org/kysely/issues/843
+            .sort((a, b) => {
+            if (a.timestamp === b.timestamp) {
+                return nameComparator(a.name, b.name);
+            }
+            return (new Date(a.timestamp).getTime() - new Date(b.timestamp).getTime());
+        })
+            .map((it) => it.name));
+    }
+    #ensureNoMissingMigrations(migrations, executedMigrations) {
+        // Ensure all executed migrations exist in the `migrations` list.
+        for (const executed of executedMigrations) {
+            if (!migrations.some((it) => it.name === executed)) {
+                throw new Error(`corrupted migrations: previously executed migration ${executed} is missing`);
+            }
+        }
+    }
+    #ensureMigrationsInOrder(migrations, executedMigrations) {
+        // Ensure the executed migrations are the first ones in the migration list.
+        for (let i = 0; i < executedMigrations.length; ++i) {
+            if (migrations[i].name !== executedMigrations[i]) {
+                throw new Error(`corrupted migrations: expected previously executed migration ${executedMigrations[i]} to be at index ${i} but ${migrations[i].name} was found in its place. New migrations must always have a name that comes alphabetically after the last executed migration.`);
+            }
+        }
+    }
+    async #migrateDown(db, state, step) {
+        const migrationsToRollback = state.executedMigrations
+            .slice()
+            .reverse()
+            .slice(0, step)
+            .map((name) => {
+            return state.migrations.find((it) => it.name === name);
+        });
+        const results = migrationsToRollback.map((migration) => {
+            return {
+                migrationName: migration.name,
+                direction: 'Down',
+                status: 'NotExecuted',
+            };
+        });
+        for (let i = 0; i < results.length; ++i) {
+            const migration = migrationsToRollback[i];
+            try {
+                if (migration.down) {
+                    await migration.down(db);
+                    await db
+                        .withPlugin(this.#schemaPlugin)
+                        .deleteFrom(this.#migrationTable)
+                        .where('name', '=', migration.name)
+                        .execute();
+                    results[i] = {
+                        migrationName: migration.name,
+                        direction: 'Down',
+                        status: 'Success',
+                    };
+                }
+            }
+            catch (error) {
+                results[i] = {
+                    migrationName: migration.name,
+                    direction: 'Down',
+                    status: 'Error',
+                };
+                throw new MigrationResultSetError({
+                    error,
+                    results,
+                });
+            }
+        }
+        return { results };
+    }
+    async #migrateUp(db, state, step) {
+        const migrationsToRun = state.pendingMigrations.slice(0, step);
+        const results = migrationsToRun.map((migration) => {
+            return {
+                migrationName: migration.name,
+                direction: 'Up',
+                status: 'NotExecuted',
+            };
+        });
+        for (let i = 0; i < results.length; i++) {
+            const migration = state.pendingMigrations[i];
+            try {
+                await migration.up(db);
+                await db
+                    .withPlugin(this.#schemaPlugin)
+                    .insertInto(this.#migrationTable)
+                    .values({
+                    name: migration.name,
+                    timestamp: new Date().toISOString(),
+                })
+                    .execute();
+                results[i] = {
+                    migrationName: migration.name,
+                    direction: 'Up',
+                    status: 'Success',
+                };
+            }
+            catch (error) {
+                results[i] = {
+                    migrationName: migration.name,
+                    direction: 'Up',
+                    status: 'Error',
+                };
+                throw new MigrationResultSetError({
+                    error,
+                    results,
+                });
+            }
+        }
+        return { results };
+    }
+    async #createIfNotExists(qb) {
+        if (this.#props.db.getExecutor().adapter.supportsCreateIfNotExists) {
+            qb = qb.ifNotExists();
+        }
+        await qb.execute();
+    }
+}
+class MigrationResultSetError extends Error {
+    #resultSet;
+    constructor(result) {
+        super();
+        this.#resultSet = result;
+    }
+    get resultSet() {
+        return this.#resultSet;
+    }
+}