host/home: add radicale calendar

hosts/home/configuration.nix

@@ -9,6 +9,35 @@
 
   local.yubikey.enable = true;
 
+  services.radicale = {
+    enable = true;
+    settings = {
+      auth = {
+        # htpasswd -B -c /etc/radicale/users
+        type = "htpasswd";
+        htpasswd_filename = "/etc/radicale/users";
+        htpasswd_encryption = "bcrypt";
+      };
+    };
+    rights = {
+      root = {
+        user = ".+";
+        collection = "";
+        permissions = "R";
+      };
+      principal = {
+        user = ".+";
+        collection = "{user}";
+        permissions = "RW";
+      };
+      calendars = {
+        user = ".+";
+        collection = "{user}/[^/]+";
+        permissions = "rw";
+      };
+    };
+  };
+
   ################################################################################
   # Programs
   ################################################################################