@chubbyts/chubbyts-negotiation/dist/negotiation.js

A simple negotiation library.

export const resolveHeaderToMap = (header) => {
    return new Map(header
        .split(',')
        .map((headerValue) => {
        const [notTrimmedName, ...notSplittedAttributes] = headerValue.split(';');
        const name = notTrimmedName.trim();
        const attributes = Object.fromEntries(notSplittedAttributes
            .filter((attribute) => -1 !== attribute.search(/=/))
            .map((attribute) => {
            const [attributeKey, attributeValue] = attribute.split('=');
            return [attributeKey.trim(), attributeValue.trim()];
        }));
        return [name, { ...attributes, q: attributes['q'] ?? '1.0' }];
    })
        .filter(([locale]) => locale !== '')
        .sort((a, b) => b[1]['q'].localeCompare(a[1]['q'])));
};