107 lines
2.8 KiB
JavaScript
107 lines
2.8 KiB
JavaScript
/*jshint esversion: 6 */
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var Store = require("./storage/file");
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var Logger = module.exports;
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/* Every line in the log should contain:
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* timestamp
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* public key of initiator
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* the action
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* the event's tag
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*/
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var messageTemplate = function (type, time, tag, info) {
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return JSON.stringify([type.toUpperCase(), time, tag, info]);
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};
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var noop = function () {};
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var write = function (ctx, content) {
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if (!ctx.store) { return; }
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ctx.store.log(ctx.channelName, content, noop);
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};
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// various degrees of logging
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const logLevels = Logger.levels = ['silly', 'verbose', 'debug', 'feedback', 'info', 'warn', 'error'];
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var handlers = {};
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['silly', 'debug', 'verbose', 'feedback', 'info'].forEach(function (level) {
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handlers[level] = function (ctx, content) { console.log(content); };
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});
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['warn', 'error'].forEach(function (level) {
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handlers[level] = function (ctx, content) { console.error(content); };
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});
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var noop = function () {};
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var createLogType = function (ctx, type) {
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if (logLevels.indexOf(type) < logLevels.indexOf(ctx.logLevel)) {
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return noop;
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}
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return function (tag, info) {
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if (ctx.shutdown) {
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throw new Error("Logger has been shut down!");
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}
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var time = new Date().toISOString();
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var content;
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try {
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content = messageTemplate(type, time, tag, info);
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} catch (e) {
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return;
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}
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if (ctx.logToStdout && typeof(handlers[type]) === 'function') {
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handlers[type](ctx, content);
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}
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write(ctx, content);
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};
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};
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var createMethods = function (ctx) {
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var log = {};
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logLevels.forEach(function (type) {
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log[type] = createLogType(ctx, type);
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});
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return log;
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};
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Logger.create = function (config, cb) {
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if (typeof(config.logLevel) !== 'string') {
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config.logLevel = 'info';
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}
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var date = new Date();
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var launchTime = ('' + date.getUTCFullYear()).slice(-2) + date.toISOString();
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var ctx = {
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channelName: launchTime,
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logFeedback: Boolean(config.logFeedback),
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logLevel: config.logLevel,
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logToStdout: config.logToStdout,
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};
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if (!config.logPath) {
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console.log("No logPath configured. Logging to file disabled");
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var logger = createMethods(ctx);
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logger.shutdown = noop;
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return void cb(Object.freeze(logger));
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}
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Store.create({
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filePath: config.logPath,
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archivePath: config.archivePath,
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}, function (err, store) {
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if (err) {
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throw err;
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}
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ctx.store = store;
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var logger = createMethods(ctx);
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logger.shutdown = function () {
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delete ctx.store;
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ctx.shutdown = true;
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store.shutdown();
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};
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cb(Object.freeze(logger));
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});
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};
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