ghost/core/server/services/api-version-compatibility/legacy-api-path-match.js

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const pathMatch = require('path-match')();

module.exports = (url) => {
    let basePath = 'ghost/api';
    let apiRouteMatcher = '/:version(v2|v3|v4|canary)?/:api(admin|content)/*';
    let urlToMatch = url;

    if (url.includes(basePath)) {
        urlToMatch = url.split(basePath)[1];
    }

    if (!urlToMatch.endsWith('/')) {
        urlToMatch += '/';
    }

    let {version, api} = pathMatch(apiRouteMatcher)(urlToMatch);

    if (version === undefined) {
        version = null;
    }

    return {version, api};
};