From 8256e7920a26d3e40e77ac056a5591f7b3a4127d Mon Sep 17 00:00:00 2001
From: Giulio De Pasquale <depasquale+git@giugl.io>
Date: Tue, 31 Aug 2021 16:36:42 +0200
Subject: [PATCH] telegram bridge matrix

---
 hosts/architect/matrix.nix | 58 ++++++++++++++++++++++++++++++++++++--
 1 file changed, 55 insertions(+), 3 deletions(-)

diff --git a/hosts/architect/matrix.nix b/hosts/architect/matrix.nix
index 12711cd..a009dd6 100644
--- a/hosts/architect/matrix.nix
+++ b/hosts/architect/matrix.nix
@@ -1,4 +1,4 @@
-{ pkgs, config, ... }:
+{ pkgs, config, tmp, ... }:
 
 with import ./network.nix;
 {
@@ -11,7 +11,10 @@ with import ./network.nix;
       registration_shared_secret = "runas!";
       dynamic_thumbnails = true;
       enable_registration = true;
-      app_service_config_files = [ "/var/lib/matrix-synapse/discord-registration.yaml" ];
+      app_service_config_files = [ 
+        "/var/lib/matrix-synapse/discord-registration.yaml" 
+        "/var/lib/matrix-synapse/telegram-registration.yaml" 
+      ];
       extraConfig = ''
         auto_join_rooms:
           - "#infra:matrix.giugl.io"
@@ -79,7 +82,7 @@ with import ./network.nix;
         enableACME = true;
         forceSSL = true;
 
-        root = pkgs.element-web.override {
+        root = pkgs.unstable.element-web.override {
           conf = {
             default_server_config."m.homeserver" = {
               "base_url" = "https://${matrixdomain}";
@@ -90,6 +93,7 @@ with import ./network.nix;
       };
     };
 
+    # discord bridge
     matrix-appservice-discord = {
       enable = true;
       environmentFile = /secrets/matrix-appservice-discord/tokens.env;
@@ -103,8 +107,56 @@ with import ./network.nix;
         };
       };
     };
+
+    # telegram bridge
+    
+  mautrix-telegram = {
+    enable = true;
+    environmentFile = /secrets/mautrix-telegram/mautrix-telegram.env;
+
+    settings = {
+      homeserver = {
+        address = "https://${matrixdomain}";
+        domain = "${matrixdomain}";
+      };
+
+      appservice = {
+        provisioning.enabled = false;
+        id = "telegram";
+      };
+
+      bridge = {
+        permissions = {
+          "@pepe:${matrixdomain}" = "admin";
+          "${matrixdomain}" = "puppeting";
+        };
+
+        # Animated stickers conversion requires additional packages in the
+        # service's path.
+        # If this isn't a fresh installation, clearing the bridge's uploaded
+        # file cache might be necessary (make a database backup first!):
+        # delete from telegram_file where \
+        #   mime_type in ('application/gzip', 'application/octet-stream')
+        animated_sticker = {
+          target = "gif";
+          args = {
+            width = 256;
+            height = 256;
+            fps = 30;               # only for webm
+            background = "020202";  # only for gif, transparency not supported
+          };
+        };
+      };
+    };
   };
 
+  };
+
+  systemd.services.mautrix-telegram.path = with pkgs; [
+    lottieconverter  # for animated stickers conversion, unfree package
+    ffmpeg           # if converting animated stickers to webm (very slow!)
+  ];
+
   networking.extraHosts = ''
         127.0.0.1 ${matrixdomain} ${matrixwebdomain}
         ${architect-lan} ${matrixdomain} ${matrixwebdomain}