/**
 * Does this filename look like it's part of the app code?
 */
function filenameIsInApp(filename, isNative = false) {
  const isInternal =
    isNative ||
    (filename &&
      // It's not internal if it's an absolute linux path
      !filename.startsWith('/') &&
      // It's not internal if it's an absolute windows path
      !filename.match(/^[A-Z]:/) &&
      // It's not internal if the path is starting with a dot
      !filename.startsWith('.') &&
      // It's not internal if the frame has a protocol. In node, this is usually the case if the file got pre-processed with a bundler like webpack
      !filename.match(/^[a-zA-Z]([a-zA-Z0-9.\-+])*:\/\//)); // Schema from: https://stackoverflow.com/a/3641782

  // in_app is all that's not an internal Node function or a module within node_modules
  // note that isNative appears to return true even for node core libraries
  // see https://github.com/getsentry/raven-node/issues/176

  return !isInternal && filename !== undefined && !filename.includes('node_modules/');
}

/** Node Stack line parser */
// eslint-disable-next-line complexity
function node(getModule) {
  const FILENAME_MATCH = /^\s*[-]{4,}$/;
  const FULL_MATCH = /at (?:async )?(?:(.+?)\s+\()?(?:(.+):(\d+):(\d+)?|([^)]+))\)?/;

  // eslint-disable-next-line complexity
  return (line) => {
    const lineMatch = line.match(FULL_MATCH);

    if (lineMatch) {
      let object;
      let method;
      let functionName;
      let typeName;
      let methodName;

      if (lineMatch[1]) {
        functionName = lineMatch[1];

        let methodStart = functionName.lastIndexOf('.');
        if (functionName[methodStart - 1] === '.') {
          methodStart--;
        }

        if (methodStart > 0) {
          object = functionName.slice(0, methodStart);
          method = functionName.slice(methodStart + 1);
          const objectEnd = object.indexOf('.Module');
          if (objectEnd > 0) {
            functionName = functionName.slice(objectEnd + 1);
            object = object.slice(0, objectEnd);
          }
        }
        typeName = undefined;
      }

      if (method) {
        typeName = object;
        methodName = method;
      }

      if (method === '<anonymous>') {
        methodName = undefined;
        functionName = undefined;
      }

      if (functionName === undefined) {
        methodName = methodName || '<anonymous>';
        functionName = typeName ? `${typeName}.${methodName}` : methodName;
      }

      let filename = lineMatch[2] && lineMatch[2].startsWith('file://') ? lineMatch[2].slice(7) : lineMatch[2];
      const isNative = lineMatch[5] === 'native';

      // If it's a Windows path, trim the leading slash so that `/C:/foo` becomes `C:/foo`
      if (filename && filename.match(/\/[A-Z]:/)) {
        filename = filename.slice(1);
      }

      if (!filename && lineMatch[5] && !isNative) {
        filename = lineMatch[5];
      }

      return {
        filename,
        module: getModule ? getModule(filename) : undefined,
        function: functionName,
        lineno: parseInt(lineMatch[3], 10) || undefined,
        colno: parseInt(lineMatch[4], 10) || undefined,
        in_app: filenameIsInApp(filename, isNative),
      };
    }

    if (line.match(FILENAME_MATCH)) {
      return {
        filename: line,
      };
    }

    return undefined;
  };
}

export { filenameIsInApp, node };
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