Added audiobookshelf service

+ SSO through authelia works, but with manual config. See #123

README.md

@@ -121,6 +121,7 @@ That being said, I am personally using all the blocks and services in this proje
 - [`jellyfin.nix`](./modules/services/jellyfin.nix) for watching media https://jellyfin.org/.
 - [Nextcloud Server](https://shb.skarabox.com/services-nextcloud.html) for private documents, contacts, calendar, etc https://nextcloud.com.
 - [`vaultwarden.nix`](./modules/services/vaultwarden.nix) for passwords https://github.com/dani-garcia/vaultwarden.
+- [`audiobookshelf.nix`](./modules/services/audiobookshelf.nix) for hosting podcasts and audio books https://www.audiobookshelf.org/.
 
 ## Demos
 

flake.nix

@@ -46,6 +46,7 @@
         modules/services/jellyfin.nix
         modules/services/nextcloud-server.nix
         modules/services/vaultwarden.nix
+        modules/services/audiobookshelf.nix
       ];
     in
       {

modules/services/audiobookshelf.nix

@@ -0,0 +1,159 @@
+{ config, pkgs, lib, ... }:
+
+let
+  cfg = config.shb.audiobookshelf;
+
+  contracts = pkgs.callPackage ../contracts {};
+
+  fqdn = "${cfg.subdomain}.${cfg.domain}";
+in
+{
+  options.shb.audiobookshelf = {
+    enable = lib.mkEnableOption "selfhostblocks.audiobookshelf";
+
+    subdomain = lib.mkOption {
+      type = lib.types.str;
+      description = "Subdomain under which audiobookshelf will be served.";
+      example = "abs";
+    };
+
+    domain = lib.mkOption {
+      type = lib.types.str;
+      description = "domain under which audiobookshelf will be served.";
+      example = "mydomain.com";
+    };
+
+    webPort = lib.mkOption {
+      type = lib.types.int;
+      description = "Audiobookshelf web port";
+      default = 8113;
+    };
+
+    ssl = lib.mkOption {
+      description = "Path to SSL files";
+      type = lib.types.nullOr contracts.ssl.certs;
+      default = null;
+    };
+
+    extraServiceConfig = lib.mkOption {
+      type = lib.types.attrsOf lib.types.str;
+      description = "Extra configuration given to the systemd service file.";
+      default = {};
+      example = lib.literalExpression ''
+      {
+        MemoryHigh = "512M";
+        MemoryMax = "900M";
+      }
+      '';
+    };
+
+    oidcProvider = lib.mkOption {
+      type = lib.types.str;
+      description = "OIDC provider name";
+      default = "Authelia";
+    };
+
+    authEndpoint = lib.mkOption {
+      type = lib.types.str;
+      description = "OIDC endpoint for SSO";
+      example = "https://authelia.example.com";
+    };
+
+    oidcClientID = lib.mkOption {
+      type = lib.types.str;
+      description = "Client ID for the OIDC endpoint";
+      default = "audiobookshelf";
+    };
+
+    oidcAdminUserGroup = lib.mkOption {
+      type = lib.types.str;
+      description = "OIDC admin group";
+      default = "audiobookshelf_admin";
+    };
+
+    oidcUserGroup = lib.mkOption {
+      type = lib.types.str;
+      description = "OIDC user group";
+      default = "audiobookshelf_user";
+    };
+
+    ssoSecretFile = lib.mkOption {
+      type = lib.types.path;
+      description = "File containing the SSO shared secret.";
+    };
+
+    logLevel = lib.mkOption {
+      type = lib.types.nullOr (lib.types.enum ["critical" "error" "warning" "info" "debug"]);
+      description = "Enable logging.";
+      default = false;
+      example = true;
+    };
+  };
+
+  config = lib.mkIf cfg.enable (lib.mkMerge [{
+
+    services.audiobookshelf = {
+      enable = true;
+      openFirewall = true;
+      dataDir = "audiobookshelf";
+      host = "127.0.0.1";
+      port = cfg.webPort;
+    };
+
+    services.nginx.virtualHosts."${fqdn}" = {
+      http2 = true;
+      forceSSL = !(isNull cfg.ssl);
+      sslCertificate = lib.mkIf (!(isNull cfg.ssl)) cfg.ssl.paths.cert;
+      sslCertificateKey = lib.mkIf (!(isNull cfg.ssl)) cfg.ssl.paths.key;
+
+      # https://github.com/advplyr/audiobookshelf#nginx-reverse-proxy
+      extraConfig = ''
+        set $audiobookshelf 127.0.0.1;
+        location / {
+             proxy_set_header X-Forwarded-For    $proxy_add_x_forwarded_for;
+             proxy_set_header  X-Forwarded-Proto $scheme;
+             proxy_set_header  Host              $host;
+             proxy_set_header Upgrade            $http_upgrade;
+             proxy_set_header Connection         "upgrade";
+
+             proxy_http_version                  1.1;
+
+             proxy_pass                          http://$audiobookshelf:${builtins.toString cfg.webPort};
+             proxy_redirect                      http:// https://;
+           }
+      '';
+    };
+
+    shb.authelia.oidcClients = [
+      {
+        id = cfg.oidcClientID;
+        description = "Audiobookshelf";
+        secretFile = cfg.ssoSecretFile;
+        public = "false";
+        authorization_policy = "one_factor";
+        redirect_uris = [ 
+        "https://${cfg.subdomain}.${cfg.domain}/auth/openid/callback" 
+        "https://${cfg.subdomain}.${cfg.domain}/auth/openid/mobile-redirect" 
+        ];
+      }
+    ];
+    
+    # We want audiobookshelf to create files in the media group and to make those files group readable.
+    users.users.audiobookshelf = {
+      extraGroups = [ "media" ];
+    };
+    systemd.services.audiobookshelfd.serviceConfig.Group = lib.mkForce "media";
+    systemd.services.audiobookshelfd.serviceConfig.UMask = lib.mkForce "0027";
+
+    # We backup the whole audiobookshelf directory and set permissions for the backup user accordingly.
+    users.groups.audiobookshelf.members = [ "backup" ];
+    users.groups.media.members = [ "backup" ];
+    shb.backup.instances.audiobookshelf = {
+      sourceDirectories = [
+        /var/lib/${config.services.audiobookshelf.dataDir}
+      ];
+    };
+  } {
+    systemd.services.audiobookshelfd.serviceConfig = cfg.extraServiceConfig;
+  }]);
+}