expo-sqlite/src/SQLite.types.ts

Provides access to a database that can be queried through a WebSQL-like API (https://www.w3.org/TR/webdatabase/). The database is persisted across restarts of your app.

// Definitions copied from `@types/websql` as we want
// to expose a custom version of the API that:
// - uses primitive `string` instead of `String`
// - excludes some methods that are not exposed by our API.
//
// Original definitions by: TeamworkGuy2 <https://github.com/TeamworkGuy2>

// @docsMissing
export interface Window {
  openDatabase?: (
    name: string,
    version: string,
    displayName: string,
    estimatedSize: number,
    creationCallback?: DatabaseCallback
  ) => Database;
}

// @docsMissing
export type DatabaseCallback = (database: Database) => void;

// @needsAudit @docsMissing
/**
 * `Database` objects are returned by calls to `SQLite.openDatabase()`. Such an object represents a
 * connection to a database on your device.
 */
export interface Database {
  version: string;

  /**
   * Execute a database transaction.
   * @param callback A function representing the transaction to perform. Takes a Transaction
   * (see below) as its only parameter, on which it can add SQL statements to execute.
   * @param errorCallback Called if an error occurred processing this transaction. Takes a single
   * parameter describing the error.
   * @param successCallback Called when the transaction has completed executing on the database.
   */
  transaction(
    callback: SQLTransactionCallback,
    errorCallback?: SQLTransactionErrorCallback,
    successCallback?: () => void
  ): void;

  readTransaction(
    callback: SQLTransactionCallback,
    errorCallback?: SQLTransactionErrorCallback,
    successCallback?: () => void
  ): void;
}

// @docsMissing
export type SQLTransactionCallback = (transaction: SQLTransaction) => void;

// @docsMissing
export type SQLTransactionErrorCallback = (error: SQLError) => void;

// @docsMissing
export type SQLStatementArg = string | number | null;

// @needsAudit
/**
 * A `SQLTransaction` object is passed in as a parameter to the `callback` parameter for the
 * `db.transaction()` method on a `Database` (see above). It allows enqueuing SQL statements to
 * perform in a database transaction.
 */
export interface SQLTransaction {
  /**
   * Enqueue a SQL statement to execute in the transaction. Authors are strongly recommended to make
   * use of the `?` placeholder feature of the method to avoid against SQL injection attacks, and to
   * never construct SQL statements on the fly.
   * @param sqlStatement A string containing a database query to execute expressed as SQL. The string
   * may contain `?` placeholders, with values to be substituted listed in the `arguments` parameter.
   * @param args An array of values (numbers, strings or nulls) to substitute for `?` placeholders in the
   * SQL statement.
   * @param callback Called when the query is successfully completed during the transaction. Takes
   * two parameters: the transaction itself, and a `ResultSet` object (see below) with the results
   * of the query.
   * @param errorCallback Called if an error occurred executing this particular query in the
   * transaction. Takes two parameters: the transaction itself, and the error object.
   */
  executeSql(
    sqlStatement: string,
    args?: SQLStatementArg[],
    callback?: SQLStatementCallback,
    errorCallback?: SQLStatementErrorCallback
  ): void;
}

// @docsMissing
export type SQLStatementCallback = (transaction: SQLTransaction, resultSet: SQLResultSet) => void;

// @docsMissing
export type SQLStatementErrorCallback = (transaction: SQLTransaction, error: SQLError) => boolean;

// @needsAudit
export type SQLResultSet = {
  /**
   * The row ID of the row that the SQL statement inserted into the database, if a row was inserted.
   */
  insertId?: number;
  /**
   * The number of rows that were changed by the SQL statement.
   */
  rowsAffected: number;
  rows: SQLResultSetRowList;
};

// @needsAudit
export interface SQLResultSetRowList {
  /**
   * The number of rows returned by the query.
   */
  length: number;
  /**
   * Returns the row with the given `index`. If there is no such row, returns `null`.
   * @param index Index of row to get.
   */
  item(index: number): any;
  /**
   * The actual array of rows returned by the query. Can be used directly instead of
   * getting rows through rows.item().
   */
  _array: any[];
}

// @docsMissing
export declare class SQLError {
  static UNKNOWN_ERR: number;
  static DATABASE_ERR: number;
  static VERSION_ERR: number;
  static TOO_LARGE_ERR: number;
  static QUOTA_ERR: number;
  static SYNTAX_ERR: number;
  static CONSTRAINT_ERR: number;
  static TIMEOUT_ERR: number;

  code: number;
  message: string;
}

/** @deprecated Use `SQLiteDatabase` instead. */
export interface WebSQLDatabase extends Database {
  exec(queries: Query[], readOnly: boolean, callback: SQLiteCallback): void;

  /**
   * Close the database.
   */
  closeAsync(): void;

  /**
   * Delete the database file.
   * > The database has to be closed prior to deletion.
   */
  deleteAsync(): Promise<void>;
}

// @docsMissing
export type Query = { sql: string; args: unknown[] };

// @docsMissing
export interface ResultSetError {
  error: Error;
}

// @needsAudit
/**
 * `ResultSet` objects are returned through second parameter of the `success` callback for the
 * `tx.executeSql()` method on a `SQLTransaction` (see above).
 */
export interface ResultSet {
  /**
   * The row ID of the row that the SQL statement inserted into the database, if a row was inserted.
   */
  insertId?: number;
  /**
   * The number of rows that were changed by the SQL statement.
   */
  rowsAffected: number;
  rows: { [column: string]: any }[];
}

// @docsMissing
export type SQLiteCallback = (
  error?: Error | null,
  resultSet?: (ResultSetError | ResultSet)[]
) => void;

/** A transaction object to perform SQL statements in async mode. */
export interface SQLTransactionAsync {
  /** Executes a SQL statement in async mode. */
  executeSqlAsync(sqlStatement: string, args?: SQLStatementArg[]): Promise<ResultSet>;
}

/** A transaction callback with given `SQLTransactionAsync` object to perform SQL statements in async mode. */
export type SQLTransactionAsyncCallback = (transaction: SQLTransactionAsync) => Promise<void>;