You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
26 lines
1.1 KiB
JavaScript
26 lines
1.1 KiB
JavaScript
import Metadata from '../metadata.js'
|
|
|
|
/**
|
|
* Pattern that makes it easy to distinguish whether a region has a single
|
|
* international dialing prefix or not. If a region has a single international
|
|
* prefix (e.g. 011 in USA), it will be represented as a string that contains
|
|
* a sequence of ASCII digits, and possibly a tilde, which signals waiting for
|
|
* the tone. If there are multiple available international prefixes in a
|
|
* region, they will be represented as a regex string that always contains one
|
|
* or more characters that are not ASCII digits or a tilde.
|
|
*/
|
|
const SINGLE_IDD_PREFIX_REG_EXP = /^[\d]+(?:[~\u2053\u223C\uFF5E][\d]+)?$/
|
|
|
|
// For regions that have multiple IDD prefixes
|
|
// a preferred IDD prefix is returned.
|
|
export default function getIddPrefix(country, callingCode, metadata) {
|
|
const countryMetadata = new Metadata(metadata)
|
|
countryMetadata.selectNumberingPlan(country, callingCode)
|
|
if (countryMetadata.defaultIDDPrefix()) {
|
|
return countryMetadata.defaultIDDPrefix()
|
|
}
|
|
if (SINGLE_IDD_PREFIX_REG_EXP.test(countryMetadata.IDDPrefix())) {
|
|
return countryMetadata.IDDPrefix()
|
|
}
|
|
}
|