react-native-cloud-store/lib/module/path.js

A react-native module for cloud operation

export class PathUtils {
  static subPath(from, to) {
    from = suffixIf(prefixIf(from, "/"), "/");
    to = suffixIf(prefixIf(to, "/"), "/");
    if (!to.startsWith(from)) {
      throw new Error(`${from} not a sub path to ${to}`);
    }
    return prefixIf(rmSuffixIf(to.slice(from.length), "/"), '/');
  }
  static join() {
    for (var _len = arguments.length, segments = new Array(_len), _key = 0; _key < _len; _key++) {
      segments[_key] = arguments[_key];
    }
    return segments.reduce((acc, cur) => {
      return acc + rmSuffixIf(prefixIf(cur, "/"), "/");
    }, "");
  }

  // change ".xx.icloud" to "xx"
  static iCloudRemoveDotExt(path) {
    return path.replace(/(.*?)(\.(.*?)\.icloud)$/, "$1$3");
  }
  static ext(path) {
    return path.split(".").pop();
  }
}
function prefixIf(path, prefix) {
  return path.startsWith(prefix) ? path : prefix + path;
}
function suffixIf(path, suffix) {
  return path.endsWith(suffix) ? path : path + suffix;
}

// function rmPrefixIf(path: string, prefix: string) {
//   return path.startsWith(prefix) ? path.slice(prefix.length) : path;
// }

function rmSuffixIf(path, suffix) {
  return path.endsWith(suffix) ? path.slice(0, -suffix.length) : path;
}
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