function getPropTypeProperty()

in src/rule-generated-flow-types.js [81:148]
64 lines of code
15 McCabe index (conditional complexity)

function getPropTypeProperty(
  context,
  typeAliasMap,
  propType,
  propName,
  visitedProps = new Set()
) {
  if (propType == null || visitedProps.has(propType)) {
    return null;
  }
  visitedProps.add(propType);
  const spreadsToVisit = [];
  if (propType.type === 'GenericTypeAnnotation') {
    return getPropTypeProperty(
      context,
      typeAliasMap,
      extractReadOnlyType(resolveTypeAlias(propType, typeAliasMap)),
      propName,
      visitedProps
    );
  }
  if (propType.type !== 'ObjectTypeAnnotation') {
    return null;
  }
  for (const property of propType.properties) {
    if (property.type === 'ObjectTypeSpreadProperty') {
      spreadsToVisit.push(property);
    } else {
      // HACK: Type annotations don't currently expose a 'key' property:
      // https://github.com/babel/babel-eslint/issues/307

      let tokenIndex = 0;
      if (property.static) {
        tokenIndex++;
      }
      if (property.variance) {
        tokenIndex++;
      }

      if (
        context.getSourceCode().getFirstToken(property, tokenIndex).value ===
        propName
      ) {
        return property;
      }
    }
  }
  for (const property of spreadsToVisit) {
    if (
      property.argument &&
      property.argument.id &&
      property.argument.id.name
    ) {
      const nextPropType = typeAliasMap[property.argument.id.name];
      const result = getPropTypeProperty(
        context,
        typeAliasMap,
        nextPropType,
        propName,
        visitedProps
      );
      if (result) {
        return result;
      }
    }
  }
  return null;
}