window.resolveLocalFileSystemURL = function()

in www/browser/Preparing.js [61:107]
28 lines of code
7 McCabe index (conditional complexity)

    window.resolveLocalFileSystemURL = function (url, win, fail) {
        /* If url starts with `cdvfile` then we need convert it to Chrome real url first:
          cdvfile://localhost/persistent/path/to/file -> filesystem:file://persistent/path/to/file */
        if (url.trim().substr(0, 7) === 'cdvfile') {
            /* Quirk:
            Plugin supports cdvfile://localhost (local resources) only.
            I.e. external resources are not supported via cdvfile. */
            if (url.indexOf('cdvfile://localhost') !== -1) {
                // Browser supports temporary and persistent only
                const indexPersistent = url.indexOf('persistent');
                const indexTemporary = url.indexOf('temporary');

                /* Chrome urls start with 'filesystem:' prefix. See quirk:
                   toURL function in Chrome returns filesystem:-prefixed path depending on application host.
                   For example, filesystem:file:///persistent/somefile.txt,
                   filesystem:http://localhost:8080/persistent/somefile.txt. */
                let prefix = 'filesystem:file:///';
                if (location.protocol !== 'file:') {
                    prefix = 'filesystem:' + location.origin + '/';
                }

                let result;
                if (indexPersistent !== -1) {
                    // cdvfile://localhost/persistent/path/to/file -> filesystem:file://persistent/path/to/file
                    // or filesystem:http://localhost:8080/persistent/path/to/file
                    result = prefix + 'persistent' + url.substr(indexPersistent + 10);
                    nativeResolveLocalFileSystemURL(result, win, fail);
                    return;
                }

                if (indexTemporary !== -1) {
                    // cdvfile://localhost/temporary/path/to/file -> filesystem:file://temporary/path/to/file
                    // or filesystem:http://localhost:8080/temporary/path/to/file
                    result = prefix + 'temporary' + url.substr(indexTemporary + 9);
                    nativeResolveLocalFileSystemURL(result, win, fail);
                    return;
                }
            }

            // cdvfile other than local file resource is not supported
            if (fail) {
                fail(new FileError(FileError.ENCODING_ERR));
            }
        } else {
            nativeResolveLocalFileSystemURL(url, win, fail);
        }
    };