@e-mc/db NPM | npm.io

@e-mc/db

NodeJS 16
ES2020

General Usage

Read the Docs

Interface

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import type { DbDataSource } from "./squared";

import type { IHost } from "./index";
import type { ClientDbConstructor, IClientDb } from "./core";
import type { BatchQueryResult, DB_TYPE, ErrorQueryCallback, ExecuteBatchQueryOptions, ExecuteQueryOptions, HandleFailOptions, ProcessRowsOptions, QueryResult, SQL_COMMAND } from "./db";
import type { AuthValue } from "./http";
import type { DbCoerceSettings, DbModule, DbSourceOptions, PoolConfig } from "./settings";

import type { SecureContextOptions } from "tls";

interface IDb extends IClientDb<IHost, DbModule, DbDataSource, DbSourceOptions, DbCoerceSettings> {
    setCredential(item: DbDataSource): Promise<void>;
    getCredential(item: DbDataSource): Record<string | number | symbol, unknown>;
    hasSource(source: string, ...type: number[]): boolean;
    applyCommand(...items: DbDataSource[]): void;
    executeQuery(item: V, callback: ErrorQueryCallback): Promise<QueryResult>;
    executeQuery(item: DbDataSource, sessionKey: string): Promise<QueryResult>;
    executeQuery(item: DbDataSource, options?: ExecuteQueryOptions | string): Promise<QueryResult>;
    executeBatchQuery(batch: DbDataSource[], callback: ErrorQueryCallback, outResult?: BatchQueryResult): Promise<BatchQueryResult>;
    executeBatchQuery(batch: DbDataSource[], sessionKey: string, outResult?: BatchQueryResult): Promise<BatchQueryResult>;
    executeBatchQuery(batch: DbDataSource[], options?: ExecuteBatchQueryOptions | string, outResult?: BatchQueryResult): Promise<BatchQueryResult>;
    processRows(batch: DbDataSource[], tasks: Promise<QueryResult | null>[], parallel: boolean): Promise<BatchQueryResult>;
    processRows(batch: DbDataSource[], tasks: Promise<QueryResult | null>[], options?: ProcessRowsOptions, outResult?: BatchQueryResult): Promise<BatchQueryResult>;
    handleFail(err: unknown, item: DbDataSource, options?: HandleFailOptions): boolean;
    readTLSCert(value: unknown, cache?: boolean): string;
    readTLSConfig(options: SecureContextOptions, cache?: boolean): void;
    settingsOf(source: string, name: keyof Omit<DbSourceOptions, "coerce">): unknown;
    settingsOf(source: string, name: "coerce", component: keyof DbCoerceSettings): unknown;
    settingsKey(source: string, name: keyof Omit<DbSourceOptions, "coerce">): unknown;
    settingsKey(source: string, name: "coerce", component: keyof DbCoerceSettings): unknown;
    getPoolConfig(source: string, uuidKey?: string): Required<PoolConfig> | undefined;
    get sourceType(): DB_TYPE;
    get commandType(): SQL_COMMAND;
}

interface DbConstructor extends ClientDbConstructor<IHost> {
    setPoolConfig(value: Record<string, PoolConfig>): void;
    getPoolConfig(source: string): Required<PoolConfig> | undefined;
    readonly prototype: IDb;
    new(module?: DbModule, database?: DbDataSource[], ...args: unknown[]): IDb;
}

interface IDbSourceClient {
    DB_SOURCE_NAME: string;
    DB_SOURCE_CLIENT: boolean;
    DB_SOURCE_TYPE: number;
    setCredential(this: IDb, item: DbDataSource): Promise<void>;
    executeQuery(this: IDb, item: DbDataSource, options?: ExecuteQueryOptions | string): Promise<QueryResult>;
    executeBatchQuery(this: IDb, batch: DbDataSource[], options?: ExecuteBatchQueryOptions | string, outResult?: BatchQueryResult): Promise<BatchQueryResult>;
    checkTimeout?(this: IDbSourceClient, value: number, limit?: number): Promise<number>;
}

interface IDbPool {
    client: unknown;
    lastAccessed: number;
    success: number;
    failed: number;
    poolKey: string;
    uuidKey: AuthValue | null;
    add(item: DbDataSource, uuidKey?: string): this;
    has(item: DbDataSource): boolean;
    getConnection(): Promise<unknown>;
    remove(): void;
    detach(force?: boolean): Promise<void>;
    close(): Promise<void>;
    isIdle(timeout: number): boolean;
    isEmpty(): boolean;
    set connected(value: boolean);
    get persist(): boolean;
    get closed(): boolean;
    get closeable(): boolean;
    set parent(value: Record<string, IDbPool>);
}

interface DbPoolConstructor {
    findKey(pools: Record<string, IDbPool>, uuidKey: unknown, poolKey: string | undefined, ...items: DbDataSource[]): Record<string, IDbPool> | null;
    validateKey(pools: Record<string, IDbPool>, username: string, uuidKey: unknown): [string, Record<string, IDbPool> | null];
    checkTimeout(pools: Record<string, IDbPool>, value: number, limit?: number): Promise<number>;
    readonly prototype: IDbPool;
    new(pool: unknown, poolKey: string, uuidKey?: AuthValue | null): IDbPool;
}

Settings

import type { DbSourceOptions, PurgeComponent } from "./settings";

interface DbModule {
    // handler: "@e-mc/db";
    mariadb?: DbStoredCredentials;
    mongodb?: DbStoredCredentials;
    mssql?: DbStoredCredentials;
    mysql?: DbStoredCredentials;
    oracle?: DbStoredCredentials;
    postgres?: DbStoredCredentials;
    redis?: DbStoredCredentials;
    settings?: {
        broadcast_id?: string | string[];
        users?: Record<string, Record<string, unknown>>;
        cache_dir?: string;
        session_expires?: number;
        user_key?: Record<string, DbSourceOptions>;
        imports?: StringMap;
        purge?: PurgeComponent;
        mariadb?: DbSourceOptions;
        mongodb?: DbSourceOptions;
        mssql?: DbSourceOptions;
        mysql?: DbSourceOptions;
        oracle?: DbSourceOptions;
        postgres?: DbSourceOptions;
        redis?: DbSourceOptions;
    };
}

type DbStoredCredentials = Record<string, Record<string, unknown>>;

Example usage

const Db = require("@e-mc/db"); // Using @pi-r/mongodb

const instance = new Db({
    mongodb: {
        main: {
            server: "localhost:27017",
            auth: {
                username: "**********",
                password: "**********"
            },
            authMechanism: "SCRAM-SHA-1"
        }
    },
    settings: {
        mongodb: {
            pool: {
                max: 10,
                idle: 60 * 1000,
                queue_max: 4,
                queue_idle: 30 * 1000,
                timeout: 10 * 1000
            },
            cache: {
                timeout: "1d",
                when_empty: false
            },
            coerce: {
                credential: false,
                options: true
            }
        }
    }
});
// instance.host = new Host();
instance.init();

const item = {
    source: "mongodb",
    credential: "main",
    table: "demo",
    name: "nodejs",
    query: {
        id: {
            "$eq": "1"
        }
    },
    willAbort: true
};
await instance.setCredential(item);

const rows = await instance.executeQuery(item, (err, item) => {
    if (err.code === "E11000") {
        return true; // throw err;
    }
    return false; // return [];
});

const [rows1, rows2] = await instance.executeBatchQuery([
        { ...item, usePool: true },
        { ...item, query: { id: { "$eq": "2" } } }
    ],
    { parallel: true, connectOnce: true }
);