From c5d02e0c371ca71a9a668bc15dfc63aaf5dc28f9 Mon Sep 17 00:00:00 2001
From: Akshay Nair <phenax5@gmail.com>
Date: Sat, 21 Mar 2026 22:59:10 +0530
Subject: Caldav server + ical sync service

---
 modules/calendar/default.nix   |  7 +++++++
 modules/calendar/ical-sync.nix | 14 ++++++++++++++
 modules/calendar/radicale.nix  | 31 +++++++++++++++++++++++++++++++
 modules/config.nix             |  1 +
 modules/network/default.nix    |  2 ++
 services/icaldav.service.nix   | 32 ++++++++++++++++++++++++++++++++
 settings.nix                   |  1 +
 7 files changed, 88 insertions(+)
 create mode 100644 modules/calendar/default.nix
 create mode 100644 modules/calendar/ical-sync.nix
 create mode 100644 modules/calendar/radicale.nix
 create mode 100644 services/icaldav.service.nix

diff --git a/modules/calendar/default.nix b/modules/calendar/default.nix
new file mode 100644
index 0000000..5728da5
--- /dev/null
+++ b/modules/calendar/default.nix
@@ -0,0 +1,7 @@
+{ ... }:
+{
+  imports = [
+    ./radicale.nix
+    ./ical-sync.nix
+  ];
+}
diff --git a/modules/calendar/ical-sync.nix b/modules/calendar/ical-sync.nix
new file mode 100644
index 0000000..a318334
--- /dev/null
+++ b/modules/calendar/ical-sync.nix
@@ -0,0 +1,14 @@
+{ settings, ... }:
+{
+  imports = [ ../../services/icaldav.service.nix ];
+
+  services.icaldavsync = {
+    enable = true;
+    syncFrequency = "*:0/30";
+    icalLink = settings.calendar.icalLink;
+    caldavServerUrl = "http://127.0.0.1:${toString settings.network.ports.caldav}";
+    password = "pass";
+    user = "joe";
+    calendar = "Work";
+  };
+}
diff --git a/modules/calendar/radicale.nix b/modules/calendar/radicale.nix
new file mode 100644
index 0000000..cb2aa1f
--- /dev/null
+++ b/modules/calendar/radicale.nix
@@ -0,0 +1,31 @@
+{ settings, ... }:
+let
+  radicaleDir = "/var/lib/radicale/collections";
+  radicalePort = settings.network.ports.caldav;
+in
+{
+  systemd.tmpfiles.rules = [
+    "d ${radicaleDir} 0755 - radicale - -"
+  ];
+
+  services.radicale = {
+    enable = true;
+    settings = {
+      server = {
+        hosts = [
+          "0.0.0.0:${toString radicalePort}"
+          "[::]:${toString radicalePort}"
+        ];
+      };
+      auth = {
+        type = "none";
+      };
+      web = {
+        type = "internal";
+      };
+      storage = {
+        filesystem_folder = radicaleDir;
+      };
+    };
+  };
+}
diff --git a/modules/config.nix b/modules/config.nix
index 54108fe..5ca3cdc 100644
--- a/modules/config.nix
+++ b/modules/config.nix
@@ -10,6 +10,7 @@
     ./notifications
     # ./monitoring
     ./rss
+    ./calendar
     ./packages.nix
   ];
 
diff --git a/modules/network/default.nix b/modules/network/default.nix
index 78aea9d..25cd5aa 100644
--- a/modules/network/default.nix
+++ b/modules/network/default.nix
@@ -16,6 +16,7 @@ in
     firewall.enable = true;
   };
 
+  # Service mappings (dns + nginx)
   services.service-router = {
     enable = true;
     routes = {
@@ -34,6 +35,7 @@ in
       "news.local" = { inherit host; port = ports.yarr; };
       # "librarian.local" = { inherit host; port = ports.lazylibrarian; };
       "paperless.local" = { inherit host; port = ports.paperless; configureNginx = true; };
+      "calendar.local" = { inherit host; port = ports.caldav; };
     };
   };
 
diff --git a/services/icaldav.service.nix b/services/icaldav.service.nix
new file mode 100644
index 0000000..0945251
--- /dev/null
+++ b/services/icaldav.service.nix
@@ -0,0 +1,32 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  cfg = config.services.icaldavsync;
+  curl = "${pkgs.curl}/bin/curl";
+  updateApiUrl = "${cfg.caldavServerUrl}/${cfg.user}/${cfg.calendar}";
+in
+{
+  options.services.icaldavsync = {
+    enable = mkEnableOption "ical caldav sync";
+    syncFrequency = mkOption { type = types.str; default = "*:0/30"; };
+    icalLink = mkOption { type = types.str; };
+    caldavServerUrl = mkOption { type = types.str; };
+    user = mkOption { type = types.str; };
+    password = mkOption { type = types.str; };
+    calendar = mkOption { type = types.str; };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.user.services.icaldavsync = {
+      enable = true;
+      script = ''
+        set -eu -o pipefail;
+        ${curl} '${cfg.icalLink}' | ${curl} -X PUT '${updateApiUrl}' -u '${cfg.user}:${cfg.password}' --data-binary @-;
+      '';
+      serviceConfig = {
+        Type = "oneshot";
+      };
+      startAt = cfg.syncFrequency;
+    };
+  };
+}
diff --git a/settings.nix b/settings.nix
index 741a6f3..da2ae5d 100644
--- a/settings.nix
+++ b/settings.nix
@@ -23,6 +23,7 @@ in lib.recursiveUpdate privateSettings rec {
       yarr = 7070;
       lazylibrarian = 5299;
       paperless = 28981;
+      caldav = 9314;
     };
     exposeTransmissionRPC = false;
   };
-- 
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