entities/lib.nix

{ lib, entities, ... }:

with lib;
let
  getHostSite = hostname:
    let site-name = entities.hosts."${hostname}".site;
    in entities.sites."${site-name}";
  getHostDomain = hostname:
    let domain-name = entities.hosts."${hostname}".domain;
    in entities.domains."${domain-name}";
  getHostRealm = hostname: (getHostDomain hostname).gssapi-realm;
  getHostFqdn = hostname:
    let hostDomain = entities.hosts."${hostname}".domain;
    in "${hostname}.${hostDomain}";

  getHostNetworkSettings = hostname:
    let
      hostDomain = entities.hosts."${hostname}".domain;
      hostNetwork = entities.zones."${hostDomain}";
    in hostNetwork.hosts."${hostname}";

  getIfAttr = as: a: if hasAttr as a then getAttr as a else null;

  getHostIpv4 = hostname:
    getIfAttr "ipv4-address" (getHostNetworkSettings hostname);
  getHostIpv6 = hostname:
    getIfAttr "ipv6-address" (getHostNetworkSettings hostname);
  getHostIps = hostname:
    filter (o: o != null) [ (getHostIpv4 hostname) (getHostIpv6 hostname) ];

  getDomainPostgresqlServer = domain:
    getHostFqdn entities.domains."${domain}".postgresql-server;

  getSiteHosts = site:
    attrNames (filterAttrs (_: hostOpts: hostOpts.site == site) entities.hosts);
  getDomainHosts = domain:
    attrNames
    (filterAttrs (_: hostOpts: hostOpts.domain == domain) entities.hosts);

  getSiteGatewayV4 = siteName:
    let site = config.fudo.sites."${siteName}";
    in if hasAttr "local-gateway" site then getHostIpv4 else site.gateway-v4;

  getHostGatewayV4 = hostname:
    getSiteGatewayV4 config.fudo.hosts."${hostname}".site;

  getSiteGatewayV6 = siteName:
    let site = config.fudo.sites."${siteName}";
    in if hasAttr "local-gateway" site then getHostIpv6 else site.gateway-v6;

  getHostGatewayV6 = hostname:
    getSiteGatewayV6 config.fudo.hosts."${hostname}".site;

in {
  inherit getHostSite getHostDomain getHostRealm getHostFqdn getHostIpv4
    getHostIpv6 getHostIps getDomainPostgresqlServer getSiteHosts getDomainHosts
    getSiteGatewayV4 getHostGatewayV4 getSiteGatewayV6 getHostGatewayV6;
}