feat: add initial config

validation/web.nix

@@ -0,0 +1,30 @@
+let
+  lib = import <nixpkgs/lib>;
+
+  validateFile = siteName: index: file:
+    let
+      _ = if builtins.isAttrs file then null else throw "web.${siteName}.files[${toString index}] must be an attrset.";
+      __ = if file ? path && builtins.isString file.path then null else throw "web.${siteName}.files[${toString index}].path must be a string.";
+      ___ = if file ? content && builtins.isString file.content then null else throw "web.${siteName}.files[${toString index}].content must be a string.";
+      ____ = if file ? contentType && builtins.isString file.contentType && file.contentType != "" then null else throw "web.${siteName}.files[${toString index}].contentType must be a non-empty string.";
+      _____ = if file ? status && builtins.isInt file.status then null else throw "web.${siteName}.files[${toString index}].status must be an int.";
+    in
+      file;
+
+  validateSite = siteName: site:
+    let
+      _ = if builtins.isAttrs site then null else throw "web.${siteName} must be an attrset.";
+      __ = if site ? files && builtins.isList site.files then null else throw "web.${siteName}.files must be a list.";
+      ___ = lib.imap0 (index: file: validateFile siteName index file) site.files;
+    in
+      site;
+
+  getWebConfig = webConfig:
+    if builtins.isAttrs webConfig then
+      lib.mapAttrs validateSite webConfig
+    else
+      throw "config/web.nix must evaluate to an attrset.";
+in
+{
+  inherit getWebConfig;
+}