2
0
mirror of https://github.com/Ride-The-Lightning/RTL synced 2024-10-31 09:20:27 +00:00
RTL/server/utils/database.ts
ShahanaFarooqui bea5980c6f
Release 0.12.0 (#916)
Release 0.12.0
2021-12-29 18:08:41 -05:00

213 lines
8.3 KiB
TypeScript

import * as fs from 'fs';
import { join, dirname, sep } from 'path';
import { fileURLToPath } from 'url';
import { Common, CommonService } from '../utils/common.js';
import { Logger, LoggerService } from '../utils/logger.js';
import { Collections, CollectionsEnum, validateOffer } from '../models/database.model.js';
import { CommonSelectedNode } from '../models/config.model.js';
export class DatabaseService {
public common: CommonService = Common;
public logger: LoggerService = Logger;
public dbDirectory = join(dirname(fileURLToPath(import.meta.url)), '..', '..', 'database');
public nodeDatabase: { id?: { adapter: DatabaseAdapter, data: Collections } } = {};
constructor() { }
loadDatabase(selectedNode: CommonSelectedNode) {
try {
if (!this.nodeDatabase[selectedNode.index]) {
this.nodeDatabase[selectedNode.index] = { adapter: null, data: null };
}
this.nodeDatabase[selectedNode.index].adapter = new DatabaseAdapter(this.dbDirectory, 'rtldb', selectedNode);
this.nodeDatabase[selectedNode.index].data = this.nodeDatabase[selectedNode.index].adapter.fetchData();
} catch (err) {
this.logger.log({ selectedNode: selectedNode, level: 'ERROR', fileName: 'Database', msg: 'Database Load Error', error: err });
}
}
create(selectedNode: CommonSelectedNode, collectionName: CollectionsEnum, newDocument: any) {
return new Promise((resolve, reject) => {
try {
if (!selectedNode || !selectedNode.index) {
reject(new Error('Selected Node Config Not Found.'));
}
const validationRes = this.validateDocument(CollectionsEnum.OFFERS, newDocument);
if (!validationRes.isValid) {
reject(validationRes.error);
} else {
this.nodeDatabase[selectedNode.index].data[collectionName].push(newDocument);
this.saveDatabase(+selectedNode.index);
resolve(newDocument);
}
} catch (errRes) {
reject(errRes);
}
});
}
update(selectedNode: CommonSelectedNode, collectionName: CollectionsEnum, updatedDocument: any, documentFieldName: string, documentFieldValue: string) {
return new Promise((resolve, reject) => {
try {
if (!selectedNode || !selectedNode.index) {
reject(new Error('Selected Node Config Not Found.'));
}
let foundDocIdx = -1;
let foundDoc = null;
if (this.nodeDatabase[selectedNode.index].data[collectionName]) {
foundDocIdx = this.nodeDatabase[selectedNode.index].data[collectionName].findIndex((document: any) => document[documentFieldName] === documentFieldValue);
foundDoc = foundDocIdx > -1 ? JSON.parse(JSON.stringify(this.nodeDatabase[selectedNode.index].data[collectionName][foundDocIdx])) : null;
}
if (foundDocIdx > -1 && foundDoc) {
for (const docKey in updatedDocument) {
if (Object.prototype.hasOwnProperty.call(updatedDocument, docKey)) {
foundDoc[docKey] = updatedDocument[docKey];
}
}
updatedDocument = foundDoc;
}
const validationRes = this.validateDocument(CollectionsEnum.OFFERS, updatedDocument);
if (!validationRes.isValid) {
reject(validationRes.error);
} else {
if (foundDocIdx > -1) {
this.nodeDatabase[selectedNode.index].data[collectionName].splice(foundDocIdx, 1, updatedDocument);
} else {
if (!this.nodeDatabase[selectedNode.index].data[collectionName]) {
this.nodeDatabase[selectedNode.index].data[collectionName] = [];
}
this.nodeDatabase[selectedNode.index].data[collectionName].push(updatedDocument);
}
this.saveDatabase(+selectedNode.index);
resolve(updatedDocument);
}
} catch (errRes) {
reject(errRes);
}
});
}
find(selectedNode: CommonSelectedNode, collectionName: CollectionsEnum, documentFieldName?: string, documentFieldValue?: string) {
return new Promise((resolve, reject) => {
try {
if (!selectedNode || !selectedNode.index) {
reject(new Error('Selected Node Config Not Found.'));
}
if (documentFieldName && documentFieldValue) {
resolve(this.nodeDatabase[selectedNode.index].data[collectionName].find((document: any) => document[documentFieldName] === documentFieldValue));
} else {
resolve(this.nodeDatabase[selectedNode.index].data[collectionName]);
}
} catch (errRes) {
reject(errRes);
}
});
}
destroy(selectedNode: CommonSelectedNode, collectionName: CollectionsEnum, documentFieldName: string, documentFieldValue: string) {
return new Promise((resolve, reject) => {
try {
if (!selectedNode || !selectedNode.index) {
reject(new Error('Selected Node Config Not Found.'));
}
const removeDocIdx = this.nodeDatabase[selectedNode.index].data[collectionName].findIndex((document) => document[documentFieldName] === documentFieldValue);
if (removeDocIdx > -1) {
this.nodeDatabase[selectedNode.index].data[collectionName].splice(removeDocIdx, 1);
} else {
reject(new Error('Unable to delete, document not found.'));
}
this.saveDatabase(+selectedNode.index);
resolve(documentFieldValue);
} catch (errRes) {
reject(errRes);
}
});
}
validateDocument(collectionName: CollectionsEnum, documentToValidate: any) {
switch (collectionName) {
case CollectionsEnum.OFFERS:
return validateOffer(documentToValidate);
default:
return ({ isValid: false, error: 'Collection does not exist' });
}
}
saveDatabase(nodeIndex: number) {
try {
const selNode = this.nodeDatabase[nodeIndex] && this.nodeDatabase[nodeIndex].adapter && this.nodeDatabase[nodeIndex].adapter.selNode ? this.nodeDatabase[nodeIndex].adapter.selNode : null;
if (!this.nodeDatabase[nodeIndex]) {
this.logger.log({ selectedNode: selNode, level: 'ERROR', fileName: 'Database', msg: 'Database Save Error: Selected Node Setup Not Found.' });
throw new Error('Database Save Error: Selected Node Setup Not Found.');
}
this.nodeDatabase[nodeIndex].adapter.saveData(this.nodeDatabase[nodeIndex].data);
this.logger.log({ selectedNode: this.nodeDatabase[nodeIndex].adapter.selNode, level: 'INFO', fileName: 'Database', msg: 'Database Saved' });
return true;
} catch (err) {
const selNode = this.nodeDatabase[nodeIndex] && this.nodeDatabase[nodeIndex].adapter && this.nodeDatabase[nodeIndex].adapter.selNode ? this.nodeDatabase[nodeIndex].adapter.selNode : null;
this.logger.log({ selectedNode: selNode, level: 'ERROR', fileName: 'Database', msg: 'Database Save Error', error: err });
return new Error(err);
}
}
unloadDatabase(nodeIndex: number) {
this.saveDatabase(nodeIndex);
this.nodeDatabase[nodeIndex] = null;
}
}
export class DatabaseAdapter {
private dbFile = '';
constructor(public dbDirectoryPath: string, public fileName: string, private selNode: CommonSelectedNode = null) {
this.dbFile = dbDirectoryPath + sep + fileName + '-node-' + selNode.index + '.json';
}
fetchData() {
try {
if (!fs.existsSync(this.dbDirectoryPath)) {
fs.mkdirSync(this.dbDirectoryPath);
}
} catch (err) {
return new Error('Unable to Create Directory Error ' + JSON.stringify(err));
}
try {
if (!fs.existsSync(this.dbFile)) {
fs.writeFileSync(this.dbFile, '{}');
}
} catch (err) {
return new Error('Unable to Create Database File Error ' + JSON.stringify(err));
}
try {
const dataFromFile = fs.readFileSync(this.dbFile, 'utf-8');
return !dataFromFile ? null : (<Collections>JSON.parse(dataFromFile));
} catch (err) {
return new Error('Database Read Error ' + JSON.stringify(err));
}
}
getSelNode() {
return this.selNode;
}
saveData(data: any) {
try {
if (data) {
const tempFile = this.dbFile + '.tmp';
fs.writeFileSync(tempFile, JSON.stringify(data, null, 2));
fs.renameSync(tempFile, this.dbFile);
}
return true;
} catch (err) {
return new Error('Database Write Error ' + JSON.stringify(err));
}
}
}
export const Database = new DatabaseService();