From 98a4f345eb410b3bbd3345f4adc18eb053b4e7e9 Mon Sep 17 00:00:00 2001
From: Simon Bruder <simon@sbruder.de>
Date: Fri, 2 Apr 2021 14:01:38 +0200
Subject: [PATCH] fuuko/matrix/mautrix-whatsapp: Init

---
 machines/fuuko/services/matrix/default.nix    |  1 +
 .../services/matrix/mautrix-whatsapp.nix      | 92 +++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 machines/fuuko/services/matrix/mautrix-whatsapp.nix

diff --git a/machines/fuuko/services/matrix/default.nix b/machines/fuuko/services/matrix/default.nix
index f342253..7dc8c59 100644
--- a/machines/fuuko/services/matrix/default.nix
+++ b/machines/fuuko/services/matrix/default.nix
@@ -1,5 +1,6 @@
 {
   imports = [
     ./synapse.nix
+    ./mautrix-whatsapp.nix
   ];
 }
diff --git a/machines/fuuko/services/matrix/mautrix-whatsapp.nix b/machines/fuuko/services/matrix/mautrix-whatsapp.nix
new file mode 100644
index 0000000..2df32f7
--- /dev/null
+++ b/machines/fuuko/services/matrix/mautrix-whatsapp.nix
@@ -0,0 +1,92 @@
+# somewhat adapted from https://github.com/NixOS/nixpkgs/pull/59211
+{ config, lib, pkgs, ... }:
+let
+  synapseCfg = config.services.matrix-synapse;
+in
+let
+  config = rec {
+    homeserver = {
+      address = synapseCfg.public_baseurl;
+      domain = synapseCfg.server_name;
+    };
+    appservice = rec {
+      hostname = "127.0.0.1";
+      port = 29318;
+      address = "http://${hostname}:${toString port}";
+      provisioning.shared_secret = "disable";
+      database = {
+        type = "sqlite3";
+        uri = "/var/lib/mautrix-whatsapp/mautrix-whatsapp.db";
+      };
+      id = "whatsapp";
+      bot = {
+        username = "whatsappbot";
+        displayname = "WhatsApp bridge bot";
+        avatar = "mxc://maunium.net/NeXNQarUbrlYBiPCpprYsRqr";
+      };
+    };
+    whatsapp = {
+      browser_name = "mx-wa";
+      os_name = "Mautrix-WhatsApp bridge";
+    };
+    bridge = {
+      chat_list_wait = 30;
+      command_prefix = "!wa";
+      connection_retry_delay = -1;
+      connection_timeout = 20;
+      delivery_receipts = true;
+      displayname_template = "{{if .Name}}{{.Name}}{{else if .Notify}}{{.Notify}}{{else}}{{.Jid}}{{end}} (WA)";
+      fetch_message_on_timeout = true;
+      initial_chat_sync_count = 10;
+      initial_history_fill_count = 20;
+      invite_own_puppet_for_backfilling = true;
+      login_qr_regen_count = 2;
+      max_connection_attempts = 12;
+      portal_sync_wait = 600;
+      private_chat_portal_meta = true;
+      recovery_chat_sync_count = -1;
+      recovery_history_backfill = true;
+      relaybot.enabled = false;
+      report_connection_retry = true;
+      sync_max_chat_age = 259200;
+      sync_with_custom_puppets = true;
+      username_template = "whatsapp_{{.}}";
+      call_notices = {
+        start = true;
+        end = true;
+      };
+      permissions = {
+        # Only one user since using the name from the address book does not
+        # work with multiple users
+        "@simon:${homeserver.domain}" = 100;
+      };
+    };
+    logging.print_level = "info";
+  };
+
+  generatedConfig = pkgs.runCommandNoCC "mautrix-whatsapp-config"
+    {
+      buildInputs = with pkgs; [ mautrix-whatsapp ];
+    }
+    ''
+      mkdir $out
+      cat ${pkgs.writeText "mautrix-whatsapp.yaml" (lib.generators.toYAML { } config)} > $out/config.yaml
+      mautrix-whatsapp -c $out/config.yaml -g -r $out/registration.yaml
+    '';
+in
+{
+  systemd.services.mautrix-whatsapp = {
+    description = "Mautrix-WhatsApp Service - A WhatsApp bridge for Matrix";
+    after = [ "network.target" "matrix-synapse.service" ];
+    wantedBy = [ "multi-user.target" ];
+
+    serviceConfig = {
+      DynamicUser = true;
+      StateDirectory = "mautrix-whatsapp";
+      ExecStart = "${pkgs.mautrix-whatsapp}/bin/mautrix-whatsapp -c ${generatedConfig}/config.yaml";
+      Restart = "on-failure";
+    };
+  };
+
+  services.matrix-synapse.app_service_config_files = lib.singleton "${generatedConfig}/registration.yaml";
+}