private compare()

in common/lib/plugin_service.ts [246:278]

• 27 lines of code
• 13 McCabe index (conditional complexity)

  private compare(hostInfoA: HostInfo, hostInfoB: HostInfo, clientA?: ClientWrapper, clientB?: ClientWrapper): Set<HostChangeOptions> {
    const changes: Set<HostChangeOptions> = new Set<HostChangeOptions>();

    if (clientA && clientB && !Object.is(clientA, clientB)) {
      changes.add(HostChangeOptions.CONNECTION_OBJECT_CHANGED);
    }

    if (hostInfoA.host !== hostInfoB.host || hostInfoA.port !== hostInfoB.port) {
      changes.add(HostChangeOptions.HOSTNAME);
    }

    if (hostInfoA.role !== hostInfoB.role) {
      if (hostInfoB.role === HostRole.WRITER) {
        changes.add(HostChangeOptions.PROMOTED_TO_WRITER);
      } else if (hostInfoB.role === HostRole.READER) {
        changes.add(HostChangeOptions.PROMOTED_TO_READER);
      }
    }

    if (hostInfoA.availability !== hostInfoB.availability) {
      if (hostInfoB.availability === HostAvailability.AVAILABLE) {
        changes.add(HostChangeOptions.WENT_UP);
      } else if (hostInfoB.availability === HostAvailability.NOT_AVAILABLE) {
        changes.add(HostChangeOptions.WENT_DOWN);
      }
    }

    if (changes.size > 0) {
      changes.add(HostChangeOptions.HOST_CHANGED);
    }

    return changes;
  }