39 lines
1007 B
JavaScript
39 lines
1007 B
JavaScript
var util = require('util');
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var fs = require('fs');
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var os = require('os');
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function FileLogger(filePath, append) {
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this._filePath = filePath;
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if (!append) {
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try {
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fs.unlink(filePath);
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} catch(e) {}
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}
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}
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function createLine(level, args, argsStartIndex) {
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var msg = util.format.apply(util, Array.prototype.slice.call(args, argsStartIndex));
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return util.format('%s %s - %s%s', new Date().toISOString().substr(11,12), level, msg, os.EOL);
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}
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FileLogger.prototype.debug = function() {
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var line = createLine('DEBUG', arguments, 0);
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fs.appendFileSync(this._filePath, line);
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};
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FileLogger.prototype.info = function() {
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var line = createLine('INFO', arguments, 0);
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fs.appendFileSync(this._filePath, line);
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};
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FileLogger.prototype.error = function(e) {
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var hasError = e instanceof Error;
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var line = createLine('ERROR', arguments, hasError ? 1 : 0);
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if (hasError) {
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line += e.stack + os.EOL;
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}
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fs.appendFileSync(this._filePath, line);
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};
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module.exports = FileLogger; |