forked from Galactic/galactic-bot
345 lines
11 KiB
JavaScript
345 lines
11 KiB
JavaScript
const Provider = require('../Provider.js');
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const { MongoClient } = require('mongodb');
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class MongoDBProvider extends Provider {
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constructor(manager, config) {
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super(manager, {
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name: 'mongodb',
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config
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});
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}
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async init() {
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try {
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this.connection = await MongoClient.connect(this.config.host+this.config.database, { useUnifiedTopology: true });
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this.manager.db = await this.connection.db(this.config.database);
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this.db = this.manager.db;
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this.manager.logger.write('info', `Provider ${this.name} connected.`);
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this._initialized = true;
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} catch(err) {
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this.manager.logger.write('error', `Provider ${this.name} failed to connect: ${err}`);
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}
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}
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_query(request) {
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/* Query object structure
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{
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type: '', -- The function to use from this class, ex. findOne
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collection: '', -- Which collection to query from
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query: { }, -- Actual search query
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data: { }, -- If the operation is to update or insert something, this is what to insert
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upsert: bool, -- If true and no matching documents are found, insert a new one
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options: { },
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projection: { } -- The fields that should be returned
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}
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*/
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if (!this._initialized) return { error: true, message: 'MongoDB not connected' };
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if (!this[request.type]) return { error: true, message: `Invalid request type, got '${request.type}'` };
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if (!request.collection && request.type !== 'stats') return { error: true, message: `You must specify a collection to query!` };
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return this[request.type](request);
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}
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/**
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* Fetches basic statistics about the database or collection
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*
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* @param {String} collection The collection to query, optional
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* @param {Object} options Optional options for the stats method
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* @returns
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* @memberof MongoDBProvider
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*/
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stats({ collection, options = { } }) {
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return new Promise((resolve, reject) => {
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if (!collection || collection.length) {
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this.db.stats(options, (error, stats) => {
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if (err) return reject(err);
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else {
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let { db, collections, objects, averageSize: avgObjSize, dataSize } = stats;
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return resolve({ db, collections, objects, averageSize, dataSize });
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}
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});
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} else {
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this.db.collection(collection).stats(options, (err, stats) => {
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if (err) return reject(err);
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else {
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let { index: ns, size, count, averageSize: avgObjSize } = stats;
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return resolve({ index, size, count, averageSize });
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}
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});
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}
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});
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}
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/**
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* Count the objects in
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*
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* @param {String} collection The collection to query
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* @param {Object} query Only documents matching this will be counted, optional
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* @param {Object} options Optional options, see mongo docs for these
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* @returns
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* @memberof MongoDBProvider
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*/
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count({ collection, query, options }) {
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return new Promise((resolve, reject) => {
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this.db.collection(collection).countDocuments(query, options, (error, result) => {
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if (error)
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return reject(error);
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else
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return resolve(result);
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});
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});
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}
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/**
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* Remove a document from a collection
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*
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* @param {String} collection The collection to remove from
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* @param {Object} query Any documents matching this will be removed
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* @returns
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* @memberof MongoDBProvider
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*/
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remove({ collection, query }) {
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return new Promise((resolve, reject) => {
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this.db.collection(collection).deleteOne(query, (err, result) => {
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if (err) return reject(err);
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return resolve(result);
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});
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});
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}
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/**
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* Insert one document to the collection
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*
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* @param {String} collection The collection to insert into
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* @param {Object} data The document to insert
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* @returns
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* @memberof MongoDBProvider
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*/
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insertOne({ collection, data }) {
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return new Promise((resolve, reject) => {
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this.db.collection(collection).insertOne(data, (err, result) => {
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if(err) reject(err);
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resolve(result);
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});
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});
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}
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/**
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* Find and return the first match
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*
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* @param {String} collection The collection to find from
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* @param {Object} query Documents matching this will be returned
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* @param {Object} projection Defines which fields to return, { 'key': 1, 'key2': 0 } -- key will return, key2 won't, optional
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* @memberof Database
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*/
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find({ collection, query, projection }) {
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//if(this.manager.debug) this.manager.logger.debug(`Incoming find query for ${db} with parameters ${JSON.stringify(query)}`);
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return new Promise((resolve, reject) => {
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if(!this._initialized) reject(new Error('MongoDB not connected'));
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this.db.collection(collection).find(query, { projection }, async (error, cursor) => {
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if(error) return reject(error);
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return resolve(await cursor.toArray());
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});
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});
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}
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/**
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* Find and return the first match
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*
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* @param {String} collection The collection in which the data is to be updated
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* @param {Object} query The filter that is used to find the data
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* @param {Object} projection Defines which fields to return, { 'key': 1, 'key2': 0 } -- key will return, key2 won't, optional
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* @returns {Object} An object containing the queried data
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* @memberof Database
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*/
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findOne({ collection, query, projection }) {
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//if(this.manager.debug) this.manager.logger.debug(`Incoming findOne query for ${db} with parameters ${JSON.stringify(query)}`);
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return new Promise((resolve, reject) => {
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if(!this._initialized) reject(new Error('MongoDB not connected'));
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this.db.collection(collection).findOne(query, { projection }, async (error, item) => {
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if(error) return reject(error);
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return resolve(item);
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});
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});
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}
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/**
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* Update the first filter match.
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*
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* @param {String} collection The collection in which the data is to be updated
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* @param {Object} query The filter that is used to find the data
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* @param {Object} data The updated data
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* @param {Boolean} [upsert=true] Create a new entry if no match is found
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* @returns {WriteResult} Object containing the followint counts: Matched, Upserted, Modified
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* @memberof Database
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*/
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updateOne({ collection, query, data, upsert = true }) {
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//if(this.manager.debug) this.manager.logger.debug(`Incoming updateOne query for ${db} with parameters ${JSON.stringify(filter)}`);
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return new Promise((resolve, reject) => {
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if(!this._initialized) reject(new Error('MongoDB not connected'));
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this.db.collection(collection).updateOne(query, { $set: data }, { upsert: upsert }, async (error, result) => {
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if(error) return reject(error);
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else {
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//return resolve(result)
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let { matchedCount, upsertedCount, modifiedCount } = result;
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return resolve({ matched: matchedCount, upserted: upsertedCount, modified: modifiedCount });
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}
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});
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});
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}
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/**
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* Remove a document property
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*
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* @param {String} collection The collection to query
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* @param {Object} query The filter that is used to find the data
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* @param {Array} data Array of fields to remove
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* @returns
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* @memberof MongoDBProvider
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*/
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removeProperty({ collection, query, data }) {
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return new Promise((resolve, reject) => {
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let unset = {};
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for (let field in data) unset[field] = '';
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this.db.collection(collection).updateOne(query, { $unset: unset }, async (error, result) => {
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if(error) return reject(error);
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else {
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let { matchedCount, modifiedCount } = result;
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return resolve({ matched: matchedCount, modified: modifiedCount });
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}
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});
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});
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}
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/**
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* Push data to an array
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*
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* @param {string} collection The collection to query
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* @param {object} query The filter to find the document to update
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* @param {object} data The data to be pushed
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* @param {boolean} [upsert=true] Create a new entry if no match is found
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* @returns
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* @memberof Database
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*/
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push({ collection, query, data, upsert = true }) {
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//if(this.manager.debug) this.manager.logger.debug(`Incoming push query for ${db}, with upsert ${upsert} and with parameters ${JSON.stringify(filter)} and data ${JSON.stringify(data)}`);
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return new Promise((resolve, reject) => {
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if(!this._initialized) reject(new Error('MongoDB not connected'));
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this.db.collection(collection).updateOne(query, { $push: data }, { upsert: upsert }, async (error, result) => {
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if(error) return reject(error);
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else return resolve(result);
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});
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});
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}
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/**
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* Find a random element from a database
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*
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* @param {string} collection The collection to query
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* @param {object} [query={}] The filtering object to narrow down the sample pool
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* @param {number} [amount=1] Amount of items to return
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* @returns {object}
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* @memberof Database
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*/
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random({ collection, query = {}, amount = 1 }) {
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//if(this.manager.debug) this.manager.logger.debug(`Incoming random query for ${db} with parameters ${JSON.stringify(filter)} and amount ${amount}`);
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if(amount > 100) amount = 100;
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return new Promise((resolve, reject)=>{
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if(!this._initialized) reject(new Error('MongoDB not connected'));
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this.db.collection(collection).aggregate([{ $match: query }, { $sample: {size: amount}}], function(err, item) {
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if(err) return reject(err);
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resolve(item);
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});
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});
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}
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}
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module.exports = MongoDBProvider; |