Function emitDeviceKeyChanges

keyserver/internal/internal.go:756–778

(producer KeyChangeProducer, existing, new []api.DeviceMessage, onlyUpdateDisplayName bool)

}

func emitDeviceKeyChanges(producer KeyChangeProducer, existing, new []api.DeviceMessage, onlyUpdateDisplayName bool) error {
	// if we only want to update the display names, we can skip the checks below
	if onlyUpdateDisplayName {
		return producer.ProduceKeyChanges(new)
	}
	// find keys in new that are not in existing
	var keysAdded []api.DeviceMessage
	for _, newKey := range new {
		exists := false
		for _, existingKey := range existing {
			// Do not treat the absence of keys as equal, or else we will not emit key changes
			// when users delete devices which never had a key to begin with as both KeyJSONs are nil.
			if existingKey.DeviceKeysEqual(&newKey) {
				exists = true
				break
			}
		}
		if !exists {
			keysAdded = append(keysAdded, newKey)
		}
	}
	return producer.ProduceKeyChanges(keysAdded)
}