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logger.ts
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logger.ts
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// Expresser: logger.ts
/** @hidden */
const _ = require("lodash")
/** @hidden */
const jaul = require("jaul")
/** @hidden */
const settings = require("setmeup").settings
/** Logger helper class to configure the Anyhow logging module. */
class Logger {
/** Recursive arguments cleaner. */
static argsCleaner(obj, index) {
const max = settings.logger.maxDepth
// Argument is array?
if (_.isArray(obj)) {
for (let i = 0; i < obj.length; i++) {
if (index >= max) {
obj[i] = "..."
} else if (_.isFunction(obj[i])) {
obj[i] = "[Function]"
} else {
Logger.argsCleaner(obj[i], index + 1)
}
}
}
// Arg is an object? Then recurisvely clean its sub properties.
else if (_.isObject(obj)) {
let keys = _.keys(obj)
for (let key of keys) {
let value = obj[key]
try {
if (index >= max) {
obj[key] = "..."
} else if (settings.logger.obfuscateFields && settings.logger.obfuscateFields.indexOf(key) >= 0) {
obj[key] = "****"
} else if (settings.logger.maskFields && settings.logger.maskFields[key]) {
let maskedValue
// Actual value might be hidden inside a value, text or data sub-property.
if (_.isObject(value)) {
maskedValue = value.value || value.text || value.data || value.toString()
} else {
maskedValue = value.toString()
}
obj[key] = jaul.data.maskString(maskedValue, "*", settings.logger.maskFields[key])
} else if (settings.logger.removeFields && settings.logger.removeFields.indexOf(key) >= 0) {
delete obj[key]
} else if (_.isArray(value)) {
for (let i = 0; i < value.length; i++) {
Logger.argsCleaner(value[i], index + 1)
}
} else if (_.isFunction(value)) {
obj[key] = "[Function]"
} else if (_.isObject(value)) {
Logger.argsCleaner(value, index + 1)
}
} catch (ex) {
/* istanbul ignore next */
delete obj[key]
/* istanbul ignore next */
obj[key] = "[Unreadable]"
}
}
}
}
/** Used as a preprocessor for the Anyhow logger. */
static clean(args: any[]): any {
Logger.argsCleaner(args, 0)
}
}
// Exports...
export = Logger