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/*
This file is part of TALER
(C) 2019 GNUnet e.V.
TALER is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
TALER is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with
TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
/**
* Check if we are running under nodejs.
*/
const isNode =
typeof process !== "undefined" &&
typeof process.release !== "undefined" &&
process.release.name === "node";
export enum LogLevel {
Trace = "trace",
Message = "message",
Info = "info",
Warn = "warn",
Error = "error",
None = "none",
}
export let globalLogLevel = LogLevel.Info;
export function setGlobalLogLevelFromString(logLevelStr: string) {
let level: LogLevel;
switch (logLevelStr.toLowerCase()) {
case "trace":
level = LogLevel.Trace;
break;
case "info":
level = LogLevel.Info;
break;
case "warn":
case "warning":
level = LogLevel.Warn;
break;
case "error":
level = LogLevel.Error;
break;
case "none":
level = LogLevel.None;
break;
default:
if (isNode) {
process.stderr.write(`Invalid log level, defaulting to WARNING\n`);
} else {
console.warn(`Invalid log level, defaulting to WARNING`);
}
level = LogLevel.Warn;
}
globalLogLevel = level;
}
function writeNodeLog(
message: any,
tag: string,
level: string,
args: any[],
): void {
try {
process.stderr.write(`${new Date().toISOString()} ${tag} ${level} `);
process.stderr.write(`${message}`);
if (args.length != 0) {
process.stderr.write(" ");
process.stderr.write(JSON.stringify(args, undefined, 2));
}
process.stderr.write("\n");
} catch (e) {
// This can happen when we're trying to log something that doesn't want to be
// converted to a string.
process.stderr.write(`${new Date().toISOString()} (logger) FATAL `);
if (e instanceof Error) {
process.stderr.write("failed to write log: ");
process.stderr.write(e.message);
}
process.stderr.write("\n");
}
}
/**
* Logger that writes to stderr when running under node,
* and uses the corresponding console.* method to log in the browser.
*/
export class Logger {
constructor(private tag: string) {}
shouldLogTrace() {
switch (globalLogLevel) {
case LogLevel.Trace:
return true;
case LogLevel.Message:
case LogLevel.Info:
case LogLevel.Warn:
case LogLevel.Error:
case LogLevel.None:
return false;
}
}
shouldLogInfo() {
switch (globalLogLevel) {
case LogLevel.Trace:
case LogLevel.Message:
case LogLevel.Info:
return true;
case LogLevel.Warn:
case LogLevel.Error:
case LogLevel.None:
return false;
}
}
shouldLogWarn() {
switch (globalLogLevel) {
case LogLevel.Trace:
case LogLevel.Message:
case LogLevel.Info:
case LogLevel.Warn:
return true;
case LogLevel.Error:
case LogLevel.None:
return false;
}
}
shouldLogError() {
switch (globalLogLevel) {
case LogLevel.Trace:
case LogLevel.Message:
case LogLevel.Info:
case LogLevel.Warn:
case LogLevel.Error:
return true;
case LogLevel.None:
return false;
}
}
info(message: string, ...args: any[]): void {
if (!this.shouldLogInfo()) {
return;
}
if (isNode) {
writeNodeLog(message, this.tag, "INFO", args);
} else {
console.info(
`${new Date().toISOString()} ${this.tag} INFO ` + message,
...args,
);
}
}
warn(message: string, ...args: any[]): void {
if (!this.shouldLogWarn()) {
return;
}
if (isNode) {
writeNodeLog(message, this.tag, "WARN", args);
} else {
console.warn(
`${new Date().toISOString()} ${this.tag} INFO ` + message,
...args,
);
}
}
error(message: string, ...args: any[]): void {
if (!this.shouldLogError()) {
return;
}
if (isNode) {
writeNodeLog(message, this.tag, "ERROR", args);
} else {
console.info(
`${new Date().toISOString()} ${this.tag} ERROR ` + message,
...args,
);
}
}
trace(message: any, ...args: any[]): void {
if (!this.shouldLogTrace()) {
return;
}
if (isNode) {
writeNodeLog(message, this.tag, "TRACE", args);
} else {
console.info(
`${new Date().toISOString()} ${this.tag} TRACE ` + message,
...args,
);
}
}
}
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