feat: initial

services/kiwix-updater.nix

@@ -0,0 +1,87 @@
+{ config, pkgs, lib, ... }:
+
+let
+  # Import service data (make sure this path is correct)
+  service_data = import ../data/services.nix;
+  kiwix = service_data.kiwix;
+  zimUrls = kiwix.urls;
+  updater = pkgs.writeShellScriptBin "kiwix-updater" ''
+    set -e
+
+    URLS=(
+      ${builtins.concatStringsSep " " zimUrls}
+    )
+
+    download() {
+      local url=''$1
+      local filename=''$(basename "''$url")
+      local filepath="${kiwix.root_dir}"/''$filename
+
+      if [ -f "''$filepath" ]; then
+        echo "''$filepath exists!"
+        return 0
+      fi
+      cd ${kiwix.root_dir}
+      ${pkgs.wget}/bin/wget --continue --quiet "''$url" -O "''$filename.tmp"
+      mv ''$filename.tmp ''$filename
+    }
+
+    build_lib() {
+      {
+        echo '<?xml version="1.0" encoding="UTF-8"?>'
+        echo '<library>'
+        for zim in "${kiwix.root_dir}"/*.zim; do
+          if [ -f "''$zim" ]; then
+            filename=''$(basename "''$zim")
+            size=''$(stat -c%s "''$zim")
+            case "''$filename" in
+              *_en_*)
+                title="English Wikipedia (Text Only)"
+                lang="eng"
+                ;;
+              *_de_*)
+                title="German Wikipedia (Text Only)"
+                lang="deu"
+                ;;
+              *)
+                title="''$filename"
+                lang="unknown"
+                ;;
+            esac
+            cat << EOF
+  <book id="''$filename" path="/data/''$filename" title="''$title" language="''$lang">
+    <title>''$title</title>
+    <language>''$lang</language>
+    <path>/data/''$filename</path>
+    <size>''$size</size>
+  </book>
+EOF
+          fi
+        done
+        echo '</library>' 
+      } > "${kiwix.root_dir}/library.xml.tmp"
+      mv "${kiwix.root_dir}/library.xml.tmp" "${kiwix.root_dir}/library.xml"
+    }
+
+    for url in "''${URLS[@]}"; do
+      download "''$url"
+    done
+  
+    build_lib
+
+    ${pkgs.systemd}/bin/systemctl restart podman-kiwix-serve.service
+  '';
+in {
+
+  environment.systemPackages = with pkgs; [
+    wget
+    curl
+  ];
+
+  services.cron = {
+    enable = true;
+    systemCronJobs = [
+      "0 3 * * * root ${updater}/bin/kiwix-updater >/dev/null 2>&1"
+    ];
+  };
+}