@meanii/tinydb
Version:
tinydb is something, which you can use for as local non-sql database
111 lines • 14.5 kB
JavaScript
import path from 'path';
import fsp from 'node:fs/promises';
import { v4 as uuidv4 } from 'uuid';
/**
* @discription TinyDb instance helps to manage a local json databases, which as many instances
* @example:
* const tinyDb = new Tinydb(`meanii-tinydb`)
* await tinydb.write([{isUser: true}])
*
* @author: anilchauhanxda@gmail.com - <https://github.com/meanii>
*/
export class Tinydb {
constructor(database) {
this.location = process.cwd(); /* getting the current working dir */
this.ACTIONS = {
query: (data, query) => data.filter(item => item[Object.keys(query).pop()] !== Object.values(query).pop()),
update: (data, query) => data.find(item => item[Object.keys(query).pop()] === Object.values(query).pop())
};
this.database = database;
this.dbPath = path.join(this.location, `.${this.database}.json`);
const _ = async () => await this.init();
}
/**
* this function helps to init the tinyDb to init the all processes, which is required to start before using it
* @returns {Promise<void>}
*/
async init() {
await fsp.appendFile(this.dbPath, ""); /* making sure, the db is exits or not */
}
/**
* this function helps to get all data from the database
* @returns {Promise<Array>}
*/
get() {
return new Promise(async (resolve) => {
try {
const data = JSON.parse(String(await fsp.readFile(this.dbPath)))?.db ?? [];
return resolve(data);
}
catch (e) {
return resolve([]);
}
});
}
/**
* this function helps to find an object and return it
* @param query
* @returns {Promise<null|*>}
*/
async findOne(query) {
let data = await this.get();
const i = data.findIndex(key => key[Object.keys(query)[0]] === Object.values(query)[0]);
if (i > -1)
return data[i];
return null;
}
/**
* this function helps to delete an object and return it
* @param query
* @returns {Promise<null|*>}
*/
async deleteMany(query) {
let data = await this.get();
return this.write([...this.ACTIONS.query(data, query)]);
}
/**
* this function helps to append data, to the db
* @param data TinydbType
* @returns {Promise<void>}
*/
async insertOne(data) {
if (!data?._id)
data._id = uuidv4();
const content = await this.get();
if (content.find(item => item._id === data._id))
throw new Error(`Primary key should be unique!`);
content.push({ ...data, createdAt: new Date(), updatedAt: new Date() });
await this.write(content);
return data;
}
/**
* this function helps to upsert the object
* @param query
* @param object
* @returns {Promise<void>}
*/
async findOneAndUpdate(query, object) {
let data = await this.get();
if (!this.ACTIONS.update(data, query))
return data;
await this.write([...this.ACTIONS.query(data, query), { ...this.ACTIONS.update(data, query), ...object, updatedAt: new Date() }]);
return this.ACTIONS.update(data, query);
}
/**
*this functions help to rewrite all data
* @param object
* @returns {Promise<void>}
*/
async write(object) {
await fsp.writeFile(this.dbPath, JSON.stringify({ db: object }, null, "\t"));
return await this.get();
}
/**
* this functions delete everything, which they have stored
* @returns {Promise<void>}
*/
async purgeAll() {
await fsp.unlink(this.dbPath);
}
}
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<https://github.com/meanii>\n */\nexport class Tinydb {\n\n    protected location: string = process.cwd() /* getting the current working dir */\n    /**\n     * init point TinyDb\n     * @param database - database name, which you want to create, it is going to be enforced the system to create the file\n     * weather if its already created or not\n     */\n    private readonly database: string\n    private readonly dbPath: string\n    private readonly ACTIONS = {\n        query: (data: TinyDBModelType[], query: TinyDBModelType): TinyDBModelType[] => data.filter(item => item[Object.keys(query).pop()] !== Object.values(query).pop()),\n        update: (data: TinyDBModelType[], query: TinyDBModelType): TinyDBModelType => data.find(item => item[Object.keys(query).pop()] === Object.values(query).pop())\n    }\n\n    constructor(database: string) {\n        this.database = database\n        this.dbPath = path.join(this.location, `.${this.database}.json`)\n        const _ = async () => await this.init()\n    }\n\n    /**\n     * this function helps to init the tinyDb to init the all processes, which is required to start before using it\n     * @returns {Promise<void>}\n     */\n    private async init(): Promise<void> {\n        await fsp.appendFile(this.dbPath, \"\") /* making sure, the db is exits or not */\n    }\n\n    /**\n     * this function helps to get all data from the database\n     * @returns {Promise<Array>}\n     */\n    public get(): Promise<TinyDBModelType[]> {\n        return new Promise(async (resolve) => {\n            try {\n                const data = JSON.parse(String(await fsp.readFile(this.dbPath)))?.db ?? []\n                return resolve(data)\n            } catch (e) {\n                return resolve([])\n            }\n        })\n    }\n\n    /**\n     * this function helps to find an object and return it\n     * @param query\n     * @returns {Promise<null|*>}\n     */\n    public async findOne(query: TinyDBModelType): Promise<null | TinyDBModelType> {\n        let data = await this.get()\n        const i = data.findIndex(key => key[Object.keys(query)[0]] === Object.values(query)[0]);\n        if (i > -1) return data[i];\n        return null\n    }\n\n    /**\n     * this function helps to delete an object and return it\n     * @param query\n     * @returns {Promise<null|*>}\n     */\n    async deleteMany<T extends TinyDBModelType>(query: T): Promise<TinyDBModelType[]> {\n        let data = await this.get()\n        return this.write([...this.ACTIONS.query(data, query)])\n    }\n\n    /**\n     * this function helps to append data, to the db\n     * @param data TinydbType\n     * @returns {Promise<void>}\n     */\n    public async insertOne<T extends TinyDBModelType>(data: T): Promise<T> {\n        if (!data?._id) data._id = uuidv4()\n        const content = await this.get()\n        if (content.find(item => item._id === data._id)) throw new Error(`Primary key should be unique!`)\n        content.push({ ...data, createdAt: new Date(), updatedAt: new Date() } as never)\n        await this.write(content)\n        return data\n    }\n\n    /**\n     * this function helps to upsert the object\n     * @param query\n     * @param object\n     * @returns {Promise<void>}\n     */\n    public async findOneAndUpdate(query: TinyDBModelType, object: TinyDBModelType): Promise<TinyDBModelType> {\n        let data = await this.get()\n        if (!this.ACTIONS.update(data, query)) return data\n        await this.write([...this.ACTIONS.query(data, query), { ...this.ACTIONS.update(data, query), ...object, updatedAt: new Date() }])\n        return this.ACTIONS.update(data, query)\n    }\n\n    /**\n     *this functions help to rewrite all data\n     * @param object\n     * @returns {Promise<void>}\n     */\n    private async write<T extends TinyDBModelType>(object: TinyDBModelType[]): Promise<TinyDBModelType[]> {\n        await fsp.writeFile(this.dbPath, JSON.stringify({ db: object }, null, \"\\t\"))\n        return await this.get()\n    }\n\n    /**\n     * this functions delete everything, which they have stored\n     * @returns {Promise<void>}\n     */\n    public async purgeAll(): Promise<void> {\n        await fsp.unlink(this.dbPath)\n    }\n}\n"]}