Auto Reggol
A collection of handy decorators for auto logging class methods and properties based on es6 proxies and reflect-metadata.
Usage
Provide a LogFunction
for auto reggol to call.
const logger: LogFunction = (ctr, targetKey, targetValue, level) => {
console.log(`${level}: ${ctr.name}.${targetKey.toString()}`, targetValue);
};
Pass the logger function into the @AutoLog
decorator.
@AutoLog({ logger, level: "debug", enablePropertyLogging: true })
class Example {}
Full example
import { AutoLog } from "../src";
import { LogFunction } from "../src/base";
import { AutoLogLevel, AutoLogBypass } from "../src/method-decorators";
import {
AutoLogPropBypass,
AutoLogPropLevel,
} from "../src/property-decorators";
const logger: LogFunction = (ctr, targetKey, targetValue, level) => {
console.log(`${level}: ${ctr.name}.${targetKey.toString()}`, targetValue);
};
@AutoLog({ logger, level: "debug", enablePropertyLogging: true })
class Example {
private a = "foo";
private b = "bar";
@AutoLogPropLevel("warn")
private c = "baz";
private d = "qux";
private e = "quuz";
@AutoLogPropBypass
private f = "corge";
@AutoLogLevel("info")
private sanitize(str: string): string {
this.d;
this.e;
this.f;
return `A String ${str}`;
}
@AutoLogBypass
private doSomething(str: string): string {
this.d;
this.e;
this.f;
return `A String ${str}`;
}
run(args: { a: string; b: string }): string {
this.a;
this.b;
this.c;
this.doSomething("something");
return this.sanitize(args.a);
}
}
const example = new Example();
example.run({ a: "Hello", b: "World" });
class NonLoggedClass {
iDontLog() {
return "not me";
}
@AutoLogMe(logger)
iDoLog(argument: string) {
return `me please ${argument}`;
}
}
const nonLoggedClass = new NonLoggedClass();
nonLoggedClass.iDontLog();
nonLoggedClass.iDoLog("arg1");
Result
debug: Example.run [ { a: 'Hello', b: 'World' } ]
debug: Example.a foo
debug: Example.b bar
warn: Example.c baz
debug: Example.d qux
debug: Example.e quuz
info: Example.sanitize [ 'Hello' ]
debug: Example.d qux
debug: Example.e quuz
info: NonLoggedClass.iDoLog [ 'arg1' ]