Opal-Estate-Pro/node_modules/plugin-error/index.js
2019-09-13 11:27:52 +07:00

191 lines
4.2 KiB
JavaScript
Executable File

var util = require('util');
var colors = require('ansi-colors');
var extend = require('extend-shallow');
var differ = require('arr-diff');
var union = require('arr-union');
var nonEnum = ['message', 'name', 'stack'];
var ignored = union(nonEnum, ['__safety', '_stack', 'plugin', 'showProperties', 'showStack']);
var props = ['fileName', 'lineNumber', 'message', 'name', 'plugin', 'showProperties', 'showStack', 'stack'];
function PluginError(plugin, message, options) {
if (!(this instanceof PluginError)) {
throw new Error('Call PluginError using new');
}
Error.call(this);
var opts = setDefaults(plugin, message, options);
var self = this;
// If opts has an error, get details from it
if (typeof opts.error === 'object') {
var keys = union(Object.keys(opts.error), nonEnum);
// These properties are not enumerable, so we have to add them explicitly.
keys.forEach(function(prop) {
self[prop] = opts.error[prop];
});
}
// Opts object can override
props.forEach(function(prop) {
if (prop in opts) {
this[prop] = opts[prop];
}
}, this);
// Defaults
if (!this.name) {
this.name = 'Error';
}
if (!this.stack) {
/**
* `Error.captureStackTrace` appends a stack property which
* relies on the toString method of the object it is applied to.
*
* Since we are using our own toString method which controls when
* to display the stack trace, if we don't go through this safety
* object we'll get stack overflow problems.
*/
var safety = {};
safety.toString = function() {
return this._messageWithDetails() + '\nStack:';
}.bind(this);
Error.captureStackTrace(safety, arguments.callee || this.constructor);
this.__safety = safety;
}
if (!this.plugin) {
throw new Error('Missing plugin name');
}
if (!this.message) {
throw new Error('Missing error message');
}
}
util.inherits(PluginError, Error);
/**
* Output a formatted message with details
*/
PluginError.prototype._messageWithDetails = function() {
var msg = 'Message:\n ' + this.message;
var details = this._messageDetails();
if (details !== '') {
msg += '\n' + details;
}
return msg;
};
/**
* Output actual message details
*/
PluginError.prototype._messageDetails = function() {
if (!this.showProperties) {
return '';
}
var props = differ(Object.keys(this), ignored);
var len = props.length;
if (len === 0) {
return '';
}
var res = '';
var i = 0;
while (len--) {
var prop = props[i++];
res += ' ';
res += prop + ': ' + this[prop];
res += '\n';
}
return 'Details:\n' + res;
};
/**
* Override the `toString` method
*/
PluginError.prototype.toString = function() {
var detailsWithStack = function(stack) {
return this._messageWithDetails() + '\nStack:\n' + stack;
}.bind(this);
var msg = '';
if (this.showStack) {
// If there is no wrapped error, use the stack captured in the PluginError ctor
if (this.__safety) {
msg = this.__safety.stack;
} else if (this._stack) {
msg = detailsWithStack(this._stack);
} else {
// Stack from wrapped error
msg = detailsWithStack(this.stack);
}
return message(msg, this);
}
msg = this._messageWithDetails();
return message(msg, this);
};
// Format the output message
function message(msg, thisArg) {
var sig = colors.red(thisArg.name);
sig += ' in plugin ';
sig += '"' + colors.cyan(thisArg.plugin) + '"';
sig += '\n';
sig += msg;
return sig;
}
/**
* Set default options based on arguments.
*/
function setDefaults(plugin, message, opts) {
if (typeof plugin === 'object') {
return defaults(plugin);
}
opts = opts || {};
if (message instanceof Error) {
opts.error = message;
} else if (typeof message === 'object') {
opts = message;
} else {
opts.message = message;
}
opts.plugin = plugin;
return defaults(opts);
}
/**
* Extend default options with:
*
* - `showStack`: default=false
* - `showProperties`: default=true
*
* @param {Object} `opts` Options to extend
* @return {Object}
*/
function defaults(opts) {
return extend({
showStack: false,
showProperties: true,
}, opts);
}
/**
* Expose `PluginError`
*/
module.exports = PluginError;