function getNamePartsFromId()

in packages/metro-source-map/src/generateFunctionMap.js [343:406]
55 lines of code
22 McCabe index (conditional complexity)

function getNamePartsFromId(id: Node): $ReadOnlyArray<string> {
  if (!id) {
    return [];
  }

  if (isAnyCallExpression(id)) {
    return getNamePartsFromId(id.callee);
  }

  if (isTypeCastExpression(id)) {
    return getNamePartsFromId(id.expression);
  }

  let name;

  if (isAnyIdentifier(id)) {
    name = id.name;
  } else if (isNullLiteral(id)) {
    name = 'null';
  } else if (isRegExpLiteral(id)) {
    name = `_${id.pattern}_${id.flags ?? ''}`;
  } else if (isTemplateLiteral(id)) {
    name = id.quasis.map(quasi => quasi.value.raw).join('');
  } else if (isLiteral(id) && id.value != null) {
    name = String(id.value);
  }

  if (name != null) {
    return [t.toBindingIdentifierName(name)];
  }

  if (isImport(id)) {
    name = 'import';
  }

  if (name != null) {
    return [name];
  }

  if (isAnyMemberExpression(id)) {
    if (
      isAnyIdentifier(id.object) &&
      id.object.name === 'Symbol' &&
      (isAnyIdentifier(id.property) || isLiteral(id.property))
    ) {
      const propertyName = getNameFromId(id.property);
      if (propertyName) {
        name = '@@' + propertyName;
      }
    } else {
      const propertyName = getNamePartsFromId(id.property);
      if (propertyName.length) {
        const objectName = getNamePartsFromId(id.object);
        if (objectName.length) {
          return [...objectName, ...propertyName];
        } else {
          return propertyName;
        }
      }
    }
  }

  return name ? [name] : [];
}