simple-fs-rotator
Version:
Automated stream rotation useful for log files
228 lines (227 loc) • 9.64 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const fs = require("fs");
const enums_1 = require("./enums");
const helper_1 = require("./helper");
// import { format } from 'date-fns'
class Rotator {
constructor(settings, lastEntry) {
var _a;
this.currentSize = 0;
this.lastDate = "";
this.fileIndx = 0;
this.settings = settings;
switch (this.settings.frequency) {
case enums_1.Frequency.hours:
if (!(this.settings.amount && this.settings.amount < 13)) {
this.settings.amount = 12;
}
else if (!(this.settings.amount && this.settings.amount > 0)) {
this.settings.amount = 1;
}
if (!this.isFormatValidForHour()) {
helper_1.Logger.log("Date format not suitable for X hours rotation. Changing date format to 'YMDHm'");
this.settings.format = "YMDHm";
}
break;
case enums_1.Frequency.minutes:
if (!(this.settings.amount && this.settings.amount < 31)) {
this.settings.amount = 30;
}
else if (!(this.settings.amount && this.settings.amount > 0)) {
this.settings.amount = 1;
}
if (!this.isFormatValidForMinutes()) {
this.settings.format = "YMDHm";
helper_1.Logger.log("Date format not suitable for X minutes rotation. Changing date format to 'YMDHm'");
}
break;
case enums_1.Frequency.daily:
if (!this.isFormatValidForDaily()) {
this.settings.format = "YMD";
helper_1.Logger.log("Date format not suitable for daily rotation. Changing date format to 'YMD'");
}
break;
}
if (this.settings.frequency !== enums_1.Frequency.none && !this.settings.filename.match("%DATE%")) {
this.settings.filename += ".%DATE%";
helper_1.Logger.log(`Appending date to the end of the filename`);
}
this.lastDate = this.getDateString();
if (this.settings.maxSize && lastEntry) {
let date = new Date(lastEntry.date);
let extension = (_a = this.settings.extension) !== null && _a !== void 0 ? _a : "";
helper_1.Logger.debug(this.getDateString(date) == this.getDateString(new Date()), this.getDateString(date), this.getDateString(new Date()));
if (this.getDateString(date) == this.getDateString(new Date())) {
let indx = lastEntry.name.match(RegExp("(\\d+)" + extension.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')));
if (indx) {
this.fileIndx = Number(indx[1]);
}
var fileSize = this.getSizeForFile(this.getNewFilename());
if (fileSize) {
this.currentSize = fileSize;
}
this.lastDate = this.getDateString(date);
helper_1.Logger.debug("LOADED LAST ENTRY", this.currentSize, this.lastDate, this.fileIndx);
}
else {
var fileSize = this.getSizeForFile(this.getNewFilename());
if (fileSize) {
this.currentSize = fileSize;
}
helper_1.Logger.debug("CURRENT FILE:", this.getNewFilename(), this.currentSize);
}
}
}
getSizeForFile(file) {
try {
if (fs.existsSync(file)) {
var fileStats = fs.statSync(this.getNewFilename());
if (fileStats) {
return fileStats.size;
}
}
}
catch (error) {
return undefined;
}
return undefined;
}
hasMaxSizeReached() {
return this.settings.maxSize ? this.currentSize > this.settings.maxSize : false;
}
hasMaxFilesReached() {
var _a;
return ((_a = this.settings.keepSettings) === null || _a === void 0 ? void 0 : _a.amount) != null && this.fileIndx >= this.settings.keepSettings.amount;
}
shouldRotate() {
let rotateBySize = this.hasMaxSizeReached();
switch (this.settings.frequency) {
case enums_1.Frequency.none:
return rotateBySize;
case enums_1.Frequency.hours:
case enums_1.Frequency.minutes:
case enums_1.Frequency.date:
case enums_1.Frequency.daily:
default:
let newDate = this.getDateString();
if (this.lastDate != newDate) {
return true;
}
else {
return rotateBySize;
}
}
}
isFormatValidForDaily() {
let date1 = new Date(2022, 2, 20, 1, 2, 3);
let date2 = new Date(2022, 2, 20, 23, 55, 45);
let date3 = new Date(2022, 2, 21, 2, 55, 45);
return this.getDateString(date1) === this.getDateString(date2) && this.getDateString(date1) !== this.getDateString(date3);
}
isFormatValidForHour() {
if (!this.settings.amount || this.settings.frequency != enums_1.Frequency.hours) {
return false;
}
let date1 = new Date(2022, 2, 20, 1, 2, 3);
let date2 = new Date(2022, 2, 20, 2 + this.settings.amount, 55, 45);
return this.getDateString(date1) !== this.getDateString(date2);
}
isFormatValidForMinutes() {
if (!this.settings.amount || this.settings.frequency != enums_1.Frequency.minutes) {
return false;
}
let date1 = new Date(2022, 2, 20, 1, 2, 3);
let date2 = new Date(2022, 2, 20, 1, 2 + this.settings.amount, 45);
return this.getDateString(date1) !== this.getDateString(date2);
}
getDateString(date) {
let _date = date || new Date();
let components = Rotator.getDateComponents(_date, this.settings.utc);
let format = this.settings.format;
if (format) {
switch (this.settings.frequency) {
case enums_1.Frequency.hours:
if (this.settings.amount) {
var hour = Math.floor(components.hour / this.settings.amount) * this.settings.amount;
components.hour = hour;
components.minute = 0;
components.second = 0;
}
case enums_1.Frequency.minutes:
if (this.settings.amount) {
var minute = Math.floor(components.minute / this.settings.amount) * this.settings.amount;
components.minute = minute;
components.second = 0;
}
}
return format === null || format === void 0 ? void 0 : format.replace(/D+/, components.day.toString().padStart(2, "0")).replace(/M+/, components.month.toString().padStart(2, "0")).replace(/Y+/, components.year.toString()).replace(/H+/, components.hour.toString().padStart(2, "0")).replace(/m+/, components.minute.toString().padStart(2, "0")).replace(/s+/, components.second.toString().padStart(2, "0")).replace(/A+/, components.hour > 11 ? "PM" : "AM");
}
return "";
}
getFilename(name, extension) {
// console.log(name.replace("%DATE%",this.lastDate) + (this.settings.maxSize ? "." + this.fileIndx : "") + (extension ? extension : ""))
return name.replace("%DATE%", this.lastDate) + (this.settings.maxSize || this.fileIndx > 0 ? "." + this.fileIndx : "") + (extension ? extension : "");
}
getNewFilename() {
return this.getFilename(this.settings.filename, this.settings.extension);
}
addBytes(bytes) {
this.currentSize += bytes;
}
rotate(force = false) {
if (force) {
this.fileIndx += 1;
}
else if (this.shouldRotate()) {
if (this.hasMaxSizeReached()) {
this.fileIndx += 1;
}
else {
this.fileIndx = 0;
}
}
else {
return;
}
if (this.hasMaxFilesReached()) {
this.fileIndx = 0;
}
this.currentSize = 0;
this.lastDate = this.getDateString();
return;
}
static getDateComponents(date, utc) {
if (utc) {
return {
day: date.getUTCDate(),
month: date.getUTCMonth() + 1,
year: date.getUTCFullYear(),
hour: date.getUTCHours(),
minute: date.getUTCMinutes(),
second: date.getUTCSeconds(),
utc: utc,
source: date
};
}
else {
return {
day: date.getDate(),
month: date.getMonth() + 1,
year: date.getFullYear(),
hour: date.getHours(),
minute: date.getMinutes(),
second: date.getSeconds(),
utc: utc,
source: date
};
}
}
static createDate(components, utc) {
if (utc) {
new Date(Date.UTC(components.year, components.month, components.day, components.hour, components.minute, components.second));
}
return new Date(components.year, components.month, components.day, components.hour, components.minute, components.second);
}
}
exports.default = Rotator;