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import { truncate } from './helpers'
const stringEscapeChars = new RegExp(
"['\\u0000-\\u001f\\u007f-\\u009f\\u00ad\\u0600-\\u0604\\u070f\\u17b4\\u17b5" +
'\\u200c-\\u200f\\u2028-\\u202f\\u2060-\\u206f\\ufeff\\ufff0-\\uffff]',
'g'
)
const escapeCharacters = {
'\b': '\\b',
'\t': '\\t',
'\n': '\\n',
'\f': '\\f',
'\r': '\\r',
"'": "\\'",
'\\': '\\\\',
}
const hex = 16
const unicodeLength = 4
function escape(char) {
return escapeCharacters[char] || `\\u${`0000${char.charCodeAt(0).toString(hex)}`.slice(-unicodeLength)}`
}
export default function inspectString(string, options) {
if (stringEscapeChars.test(string)) {
string = string.replace(stringEscapeChars, escape)
}
return options.stylize(`'${truncate(string, options.truncate - 2)}'`, 'string')
}
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