57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
var prr = require('prr')
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function init (type, message, cause) {
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if (!!message && typeof message != 'string') {
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message = message.message || message.name
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}
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prr(this, {
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type : type
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, name : type
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// can be passed just a 'cause'
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, cause : typeof message != 'string' ? message : cause
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, message : message
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}, 'ewr')
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}
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// generic prototype, not intended to be actually used - helpful for `instanceof`
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function CustomError (message, cause) {
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Error.call(this)
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if (Error.captureStackTrace)
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Error.captureStackTrace(this, this.constructor)
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init.call(this, 'CustomError', message, cause)
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}
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CustomError.prototype = new Error()
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function createError (errno, type, proto) {
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var err = function (message, cause) {
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init.call(this, type, message, cause)
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//TODO: the specificity here is stupid, errno should be available everywhere
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if (type == 'FilesystemError') {
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this.code = this.cause.code
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this.path = this.cause.path
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this.errno = this.cause.errno
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this.message =
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(errno.errno[this.cause.errno]
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? errno.errno[this.cause.errno].description
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: this.cause.message)
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+ (this.cause.path ? ' [' + this.cause.path + ']' : '')
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}
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Error.call(this)
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if (Error.captureStackTrace)
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Error.captureStackTrace(this, err)
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}
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err.prototype = !!proto ? new proto() : new CustomError()
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return err
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}
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module.exports = function (errno) {
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var ce = function (type, proto) {
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return createError(errno, type, proto)
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}
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return {
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CustomError : CustomError
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, FilesystemError : ce('FilesystemError')
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, createError : ce
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}
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}
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