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blueslip: Convert Logger to an ES6 class.

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Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit is contained in:
Anders Kaseorg 2020-07-22 16:10:33 -07:00 committed by Tim Abbott
parent 58c84940f4
commit ba4ef5bf90
1 changed files with 42 additions and 55 deletions
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97
static/js/blueslip.js
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@ -12,69 +12,56 @@ if (Error.stackTraceLimit !== undefined) {
Error.stackTraceLimit = 100000;
}
function Logger() {
this._memory_log = [];
function pad(num, width) {
return num.toString().padStart(width, "0");
}
Logger.prototype = (function () {
function pad(num, width) {
let ret = num.toString();
while (ret.length < width) {
ret = "0" + ret;
function make_logger_func(name) {
return function Logger_func(...args) {
const now = new Date();
const date_str =
now.getUTCFullYear() +
"-" +
pad(now.getUTCMonth() + 1, 2) +
"-" +
pad(now.getUTCDate(), 2) +
" " +
pad(now.getUTCHours(), 2) +
":" +
pad(now.getUTCMinutes(), 2) +
":" +
pad(now.getUTCSeconds(), 2) +
"." +
pad(now.getUTCMilliseconds(), 3) +
" UTC";
const str_args = args.map((x) => (typeof x === "object" ? JSON.stringify(x) : x));
const log_entry = date_str + " " + name.toUpperCase() + ": " + str_args.join("");
this._memory_log.push(log_entry);
// Don't let the log grow without bound
if (this._memory_log.length > 1000) {
this._memory_log.shift();
}
return ret;
}
function make_logger_func(name) {
return function Logger_func(...args) {
const now = new Date();
const date_str =
now.getUTCFullYear() +
"-" +
pad(now.getUTCMonth() + 1, 2) +
"-" +
pad(now.getUTCDate(), 2) +
" " +
pad(now.getUTCHours(), 2) +
":" +
pad(now.getUTCMinutes(), 2) +
":" +
pad(now.getUTCSeconds(), 2) +
"." +
pad(now.getUTCMilliseconds(), 3) +
" UTC";
const str_args = args.map((x) => (typeof x === "object" ? JSON.stringify(x) : x));
const log_entry = date_str + " " + name.toUpperCase() + ": " + str_args.join("");
this._memory_log.push(log_entry);
// Don't let the log grow without bound
if (this._memory_log.length > 1000) {
this._memory_log.shift();
}
if (console[name] !== undefined) {
return console[name](...args);
}
return;
};
}
const proto = {
get_log: function Logger_get_log() {
return this._memory_log;
},
if (console[name] !== undefined) {
return console[name](...args);
}
};
}
const methods = ["debug", "log", "info", "warn", "error"];
let i;
for (i = 0; i < methods.length; i += 1) {
proto[methods[i]] = make_logger_func(methods[i]);
class Logger {
_memory_log = [];
get_log() {
return this._memory_log;
}
}
return proto;
})();
for (const name of ["debug", "log", "info", "warn", "error"]) {
Logger.prototype[name] = make_logger_func(name);
}
const logger = new Logger();