@svta/common-media-library/dist/structuredfield/serialize/serializeKey.js

A common library for media playback in JavaScript

import { KEY } from '../utils/KEY.js';
import { serializeError } from './serializeError.js';
// 4.1.1.3.  Serializing a Key
//
// Given a key as input_key, return an ASCII string suitable for use in
// a HTTP field value.
//
// 1.  Convert input_key into a sequence of ASCII characters; if
//     conversion fails, fail serialization.
//
// 2.  If input_key contains characters not in lcalpha, DIGIT, "_", "-",
//     ".", or "*" fail serialization.
//
// 3.  If the first character of input_key is not lcalpha or "*", fail
//     serialization.
//
// 4.  Let output be an empty string.
//
// 5.  Append input_key to output.
//
// 6.  Return output.
export function serializeKey(value) {
    if (/^[a-z*][a-z0-9\-_.*]*$/.test(value) === false) {
        throw serializeError(value, KEY);
    }
    return value;
}
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