let
  common = import ./common.nix;
in
rec {
  getServerName = serviceData:
    let
      continuwuity =
        if serviceData ? continuwuity then
          common.ensureAttrset "config/services.nix continuwuity" serviceData.continuwuity
        else
          throw "config/services.nix must define continuwuity attrset.";

      serverName =
        if continuwuity ? server_name then
          common.ensureString "config/services.nix continuwuity.server_name" continuwuity.server_name
        else
          throw "config/services.nix continuwuity.server_name must exist.";
    in
      if serverName != "" then
        serverName
      else
        throw "config/services.nix continuwuity.server_name must be a non-empty string.";

  getTrustedServers = serviceData:
    let
      continuwuity =
        if serviceData ? continuwuity then
          common.ensureAttrset "config/services.nix continuwuity" serviceData.continuwuity
        else
          throw "config/services.nix must define continuwuity attrset.";

      trustedServers =
        if continuwuity ? trusted_servers then
          common.ensureList "config/services.nix continuwuity.trusted_servers" continuwuity.trusted_servers
        else
          throw "config/services.nix continuwuity.trusted_servers must exist.";
    in
      trustedServers;

  getMemoryMax = serviceData:
    let
      continuwuity =
        if serviceData ? continuwuity then
          common.ensureAttrset "config/services.nix continuwuity" serviceData.continuwuity
        else
          throw "config/services.nix must define continuwuity attrset.";
    in
      if !(continuwuity ? memory_max) then
        null
      else
        let
          value = common.ensureString "config/services.nix continuwuity.memory_max" continuwuity.memory_max;
        in
          if value != "" then value else throw "config/services.nix continuwuity.memory_max must be a non-empty string when provided.";
}