function resolveToFullPath_()

in src/browser/FileProxy.js [722:790]

• 51 lines of code
• 11 McCabe index (conditional complexity)

        function resolveToFullPath_ (cwdFullPath, path) {
            path = path || '';
            let fullPath = path;
            let prefix = '';

            cwdFullPath = cwdFullPath || DIR_SEPARATOR;
            if (cwdFullPath.indexOf(FILESYSTEM_PREFIX) === 0) {
                prefix = cwdFullPath.substring(0, cwdFullPath.indexOf(DIR_SEPARATOR, FILESYSTEM_PREFIX.length));
                cwdFullPath = cwdFullPath.substring(cwdFullPath.indexOf(DIR_SEPARATOR, FILESYSTEM_PREFIX.length));
            }

            const relativePath = path[0] !== DIR_SEPARATOR;
            if (relativePath) {
                fullPath = cwdFullPath;
                if (cwdFullPath !== DIR_SEPARATOR) {
                    fullPath += DIR_SEPARATOR + path;
                } else {
                    fullPath += path;
                }
            }

            // Remove doubled separator substrings
            const re = new RegExp(DIR_SEPARATOR + DIR_SEPARATOR, 'g');
            fullPath = fullPath.replace(re, DIR_SEPARATOR);

            // Adjust '..'s by removing parent directories when '..' flows in path.
            const parts = fullPath.split(DIR_SEPARATOR);
            for (let i = 0; i < parts.length; ++i) {
                const part = parts[i];
                if (part === '..') {
                    parts[i - 1] = '';
                    parts[i] = '';
                }
            }
            fullPath = parts.filter(function (el) {
                return el;
            }).join(DIR_SEPARATOR);

            // Add back in leading slash.
            if (fullPath[0] !== DIR_SEPARATOR) {
                fullPath = DIR_SEPARATOR + fullPath;
            }

            // Replace './' by current dir. ('./one/./two' -> one/two)
            fullPath = fullPath.replace(/\.\//g, DIR_SEPARATOR);

            // Replace '//' with '/'.
            fullPath = fullPath.replace(/\/\//g, DIR_SEPARATOR);

            // Replace '/.' with '/'.
            fullPath = fullPath.replace(/\/\./g, DIR_SEPARATOR);

            // Remove '/' if it appears on the end.
            if (fullPath[fullPath.length - 1] === DIR_SEPARATOR &&
                fullPath !== DIR_SEPARATOR) {
                fullPath = fullPath.substring(0, fullPath.length - 1);
            }

            let storagePath = prefix + fullPath;
            storagePath = decodeURI(storagePath);
            fullPath = decodeURI(fullPath);

            return {
                storagePath,
                fullPath,
                fileName: fullPath.split(DIR_SEPARATOR).pop(),
                fsName: prefix.split(DIR_SEPARATOR).pop()
            };
        }