func loadMetadataFromFile()

in phonenumbers.go [678:704]

• 23 lines of code
• 6 McCabe index (conditional complexity)

func loadMetadataFromFile(
	regionCode string,
	countryCallingCode int) error {

	metadataCollection, err := MetadataCollection()
	if err != nil {
		return err
	} else if currMetadataColl == nil {
		currMetadataColl = metadataCollection
	}

	metadataList := metadataCollection.GetMetadata()
	if len(metadataList) == 0 {
		return ErrEmptyMetadata
	}

	for _, meta := range metadataList {
		region := meta.GetId()
		if region == "001" {
			// it's a non geographical entity
			writeToCountryCodeToNonGeographicalMetadataMap(int(meta.GetCountryCode()), meta)
		} else {
			writeToRegionToMetadataMap(region, meta)
		}
	}
	return nil
}