chore(motion): clean up settings

modules/nixos/motion.nix

@@ -1,4 +1,51 @@
-{
+let
+  cameraModule = {
+    pkgs,
+    config,
+    gensokyo-zone,
+    name,
+    lib,
+    lib'motion,
+    ...
+  }: let
+    inherit (lib.options) mkOption mkEnableOption;
+    inherit (lib.modules) mkIf mkMerge mkOptionDefault;
+    inherit (lib.strings) hasPrefix;
+  in {
+    options = with lib.types; {
+      enable = mkEnableOption "camera" // {
+        default = true;
+      };
+      settings = mkOption {
+        type = attrsOf (oneOf [str int bool]);
+        description = "https://motion-project.github.io/motion_config.html";
+      };
+      extraConfig = mkOption {
+        type = lines;
+        default = "";
+      };
+      configText = mkOption {
+        type = lines;
+        internal = true;
+      };
+      configFile = mkOption {
+        type = path;
+      };
+    };
+    config = let
+      configFile = pkgs.writeText "motion.conf" config.configText;
+    in {
+      settings = {
+        videodevice = mkIf (hasPrefix "/" name) (mkOptionDefault name);
+      };
+      configFile = mkOptionDefault "${configFile}";
+      configText = mkMerge (
+        (lib'motion.mkMotionSettings config.settings)
+        ++ [config.extraConfig]
+      );
+    };
+  };
+in {
   pkgs,
   config,
   gensokyo-zone,
@@ -6,23 +53,26 @@
   lib,
   ...
 }: let
-  inherit (gensokyo-zone.lib) mapOptionDefaults;
   inherit (lib.options) mkOption mkPackageOption mkEnableOption;
   inherit (lib.modules) mkIf mkMerge mkAfter mkOptionDefault;
-  inherit (lib.attrsets) mapAttrsToList;
+  inherit (lib.attrsets) attrValues mapAttrsToList;
+  inherit (lib.lists) filter;
   inherit (lib.meta) getExe;
   cfg = config.services.motion;
-  mkMotionValue = value:
-    if value == true
-    then "on"
-    else if value == false
-    then "off"
-    else toString value;
-  mkMotionSetting = key: value: "${key} ${mkMotionValue value}";
+  lib'motion = config.lib.motion;
 in {
   options.services.motion = with lib.types; {
     enable = mkEnableOption "motion";
     package = mkPackageOption pkgs "motion" {};
+    cameras = mkOption {
+      type = attrsOf (submoduleWith {
+        modules = [ cameraModule ];
+        specialArgs = {
+          inherit pkgs gensokyo-zone lib'motion;
+          nixosConfig = config;
+        };
+      });
+    };
     dataDir = mkOption {
       type = path;
       default = "/var/lib/motion";
@@ -37,7 +87,7 @@ in {
     };
     settings = mkOption {
       type = attrsOf (oneOf [str int bool]);
-      description = "https://linux.die.net/man/1/motion";
+      description = "https://motion-project.github.io/motion_config.html";
     };
     extraArgs = mkOption {
       type = listOf str;
@@ -57,14 +107,19 @@ in {
   };
   config.services.motion = let
     configFile = pkgs.writeText "motion.conf" cfg.configText;
+    enableIPv6 = mkIf config.networking.enableIPv6 (mkOptionDefault true);
+    enabledCameras = filter (camera: camera.enable) (attrValues cfg.cameras);
   in {
-    settings = mapOptionDefaults {
-      target_dir = cfg.dataDir;
+    settings = {
+      target_dir = mkOptionDefault cfg.dataDir;
+      ipv6_enabled = enableIPv6;
+      webcontrol_ipv6 = enableIPv6;
     };
     configFile = mkOptionDefault "${configFile}";
     configText = mkMerge (
-      (mapAttrsToList mkMotionSetting cfg.settings)
-      ++ [(mkAfter cfg.extraConfig)]
+      (lib'motion.mkMotionSettings cfg.settings)
+      ++ [cfg.extraConfig]
+      ++ map (camera: mkAfter "camera ${camera.configFile}") enabledCameras
     );
   };
   config.users = mkIf cfg.enable {
@@ -101,4 +156,14 @@ in {
         ];
       };
     };
+  config.lib.motion = {
+    mkMotionValue = value:
+      if value == true
+      then "on"
+      else if value == false
+      then "off"
+      else toString value;
+    mkMotionSetting = key: value: "${key} ${lib'motion.mkMotionValue value}";
+    mkMotionSettings = mapAttrsToList lib'motion.mkMotionSetting;
+  };
 }