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import { app } from 'electron';
import fs from 'fs';
import path from 'path';
import { IpcMainEventChannel } from './ipc-event-channel';
import { LogLevel, ILogInput, ILogOutput } from '../shared/logging-types';
export const OLD_LOG_FILES = ['main.log', 'renderer.log', 'frontend.log'];
export class FileOutput implements ILogOutput {
private fileDescriptor: number;
constructor(public level: LogLevel, filePath: string) {
this.fileDescriptor = fs.openSync(filePath, fs.constants.O_CREAT | fs.constants.O_WRONLY);
}
public dispose() {
fs.closeSync(this.fileDescriptor);
}
public write(_level: LogLevel, message: string): Promise<void> {
return new Promise((resolve, reject) => {
fs.write(this.fileDescriptor, `${message}\n`, (err) => {
if (err) {
reject(err);
} else {
resolve();
}
});
});
}
}
export class IpcInput implements ILogInput {
public on(handler: (level: LogLevel, message: string) => void) {
IpcMainEventChannel.logging.handleLog(({ level, message }) => handler(level, message));
}
}
export function getMainLogPath() {
return path.join(getLogDirectoryDir(), 'frontend-main.log');
}
export function getRendererLogPath() {
return path.join(getLogDirectoryDir(), 'frontend-renderer.log');
}
export function createLoggingDirectory(): void {
fs.mkdirSync(getLogDirectoryDir(), { recursive: true });
}
// When cleaning up old log files they are first backed up and the next time removed.
export function cleanUpLogDirectory(fileNames: string[]): void {
fileNames.forEach((fileName) => {
const filePath = path.join(getLogDirectoryDir(), fileName);
rotateOrDeleteFile(filePath);
});
}
export function backupLogFile(filePath: string) {
const backupFilePath = getBackupFilePath(filePath);
if (fileExists(filePath)) {
fs.renameSync(filePath, backupFilePath);
}
}
export function rotateOrDeleteFile(filePath: string): void {
const backupFilePath = getBackupFilePath(filePath);
if (fileExists(filePath)) {
backupLogFile(filePath);
} else if (fileExists(backupFilePath)) {
fs.unlinkSync(backupFilePath);
}
}
function getBackupFilePath(filePath: string): string {
const parsedPath = path.parse(filePath);
parsedPath.base = parsedPath.name + '.old' + parsedPath.ext;
return path.normalize(path.format(parsedPath));
}
function getLogDirectoryDir() {
return app.getPath('logs');
}
function fileExists(filePath: string): boolean {
try {
fs.accessSync(filePath);
return true;
} catch (e) {
return false;
}
}
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