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metamask-extension/ui/helpers/utils/accounts.js

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export function getAccountNameErrorMessage(
accounts,
context,
newAccountName,
defaultAccountName,
) {
const isDuplicateAccountName = accounts.some(
(item) => item.name === newAccountName,
);
const localizedWordForAccount = context
.t('newAccountNumberName')
.replace(' $1', '');
// Match strings starting with ${localizedWordForAccount} and then any numeral, case insensitive
// Trim spaces before and after
const reservedRegEx = new RegExp(
`^\\s*${localizedWordForAccount} \\d+\\s*$`,
'iu',
);
const isReservedAccountName = reservedRegEx.test(newAccountName);
const isValidAccountName =
newAccountName === defaultAccountName || // What is written in the text field is the same as the placeholder
(!isDuplicateAccountName && !isReservedAccountName);
let errorMessage;
if (isValidAccountName) {
errorMessage = '\u200d'; // This is Unicode for an invisible character, so the spacing stays constant
} else if (isDuplicateAccountName) {
errorMessage = context.t('accountNameDuplicate');
} else if (isReservedAccountName) {
errorMessage = context.t('accountNameReserved');
}
return { isValidAccountName, errorMessage };
}