@intuitionrobotics/thunderstorm/dist/app-backend/utils/LogClient_File.js

Thunderstorm

import { LogClient_BaseRotate } from "@intuitionrobotics/ts-common";
import * as fs from "fs";
import { WriteStream } from "fs";
export class LogClient_File extends LogClient_BaseRotate {
    pathToFolder;
    buffer;
    constructor(name, pathToFolder, maxEntries = 10, maxSize = 1024 * 1024) {
        super(name, maxEntries, maxSize);
        this.pathToFolder = pathToFolder;
        if (!fs.existsSync(pathToFolder))
            fs.mkdirSync(pathToFolder, { recursive: true });
        const defaultLogfile = this.getFileName();
        if (fs.existsSync(defaultLogfile))
            this.bufferSize = fs.statSync(`${defaultLogfile}`).size;
        this.prepare();
    }
    getFileName(index = 0) {
        return `${this.pathToFolder}/${this.name}-${index}.txt`;
    }
    printLogMessage(log) {
        this.buffer.write(log);
    }
    rotateBuffer(fromIndex, toIndex) {
        if (fs.existsSync(this.getFileName(fromIndex))) {
            console.log(`rotating ${fromIndex} => ${toIndex}`);
            fs.renameSync(this.getFileName(fromIndex), this.getFileName(toIndex));
        }
    }
    cleanup() {
        const fileName = this.getFileName(this.maxEntries - 1);
        if (fs.existsSync(fileName))
            fs.unlinkSync(fileName);
        this.buffer.end();
    }
    prepare() {
        this.buffer = fs.createWriteStream(this.getFileName(), { flags: 'a' });
    }
}
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