;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2021 Raghav Gururajan <rg@raghavgururajan.name>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.

(define-module (gnu packages telegram)
  #:use-module (gnu packages)
  #:use-module (gnu packages assembly)
  #:use-module (gnu packages image)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages pkg-config)
  #:use-module (gnu packages protobuf)
  #:use-module (gnu packages pulseaudio)
  #:use-module (gnu packages python)
  #:use-module (gnu packages tls)
  #:use-module (gnu packages video)
  #:use-module (gnu packages xiph)
  #:use-module ((guix licenses) #:prefix license:)
  #:use-module (guix packages)
  #:use-module (guix git-download)
  #:use-module (guix build-system cmake))

(define-public tg-owt
  (let ((commit "ace538a7dfe0fe5fc735f258ba49e7420a5d10b0")
        (revision "1"))
    (package
      (name "tg-owt")
      (version
       (git-version "0" revision commit))
      (source
       (origin
         (method git-fetch)
         (uri
          (git-reference
           (url "https://github.com/desktop-app/tg_owt.git")
           (commit commit)))
         (file-name
          (git-file-name name version))
         (sha256
          (base32 "0d4lcxh0v1gf2gq9f073vwk9lv4x23k0r3365n0bx979fjcn18xf"))
         (modules '((guix build utils)
                    (ice-9 ftw)
                    (srfi srfi-1)))
         (snippet
          `(begin
             (let ((keep
                    '( ;; Custom forks which are incompatible with the ones in Guix.
                      "abseil-cpp" "libsrtp" "openh264" "rnnoise"
                      ;; Not available in Guix.
                      "pffft" "usrsctp"
                      ;; Has cmake support files for libvpx input.
                      "libvpx")))
               (with-directory-excursion "src/third_party"
                 (for-each delete-file-recursively
                           (lset-difference string=?
                                            (scandir ".")
                                            (cons* "." ".." keep))))
               #t)))))
      (build-system cmake-build-system)
      (arguments
       `(#:tests? #f                    ; No target
         #:configure-flags
         (list
          "-DCMAKE_C_FLAGS=-fPIC"
          "-DCMAKE_CXX_FLAGS=-fPIC")
         #:phases
         (modify-phases %standard-phases
           (add-after 'unpack 'copy-inputs
             (lambda* (#:key inputs outputs #:allow-other-keys)
               (let* ((libvpx-from (assoc-ref inputs "libvpx"))
                      (libyuv-from (assoc-ref inputs "libyuv"))
                      (libvpx-to (string-append (getcwd)
                                                "/src/third_party/libvpx/source/libvpx"))
                      (libyuv-to (string-append (getcwd)
                                                "/src/third_party/libyuv")))
                 (copy-recursively libvpx-from libvpx-to)
                 (copy-recursively libyuv-from libyuv-to))
               #t)))))
      (native-inputs
       `(("pkg-config" ,pkg-config)
         ("python" ,python-wrapper)
         ("yasm" ,yasm)))
      (inputs
       `(("alsa" ,alsa-lib)
         ("ffmpeg" ,ffmpeg)
         ("libjpeg" ,libjpeg-turbo)
         ("libvpx"
          ,(origin
             (method git-fetch)
             (uri
              (git-reference
               (url "https://chromium.googlesource.com/webm/libvpx")
               (commit "5b63f0f821e94f8072eb483014cfc33b05978bb9")))
             (file-name
              (git-file-name "libvpx-for-tg-owt" version))
             (sha256
              (base32 "1psvxaddihlw1k5n0anxif3qli6zyw2sa2ywn6mkb8six9myrp68"))))
         ("libyuv"
          ,(origin
             (method git-fetch)
             (uri
              (git-reference
               (url "https://chromium.googlesource.com/libyuv/libyuv")
               (commit "ad890067f661dc747a975bc55ba3767fe30d4452")))
             (file-name
              (git-file-name "libyuv-for-tg-owt" version))
             (sha256
              (base32 "01knnk4h247rq536097n9n3s3brxlbby3nv3ppdgsqfda3k159ll"))))
         ("openssl" ,openssl)
         ("opus" ,opus)
         ("protobuf" ,protobuf)
         ("pulseaudio" ,pulseaudio)))
      (synopsis "WebRTC support for Telegram-Desktop")
      (description "Tg_owt is a custom WebRTC fork by Telegram project,
for its use in telegram desktop client.")
      (home-page "https://github.com/desktop-app/tg_owt")
      (license
       (list
        ;; Abseil-CPP
        license:asl2.0
        ;; LibYuv
        (license:non-copyleft "file:///src/third_party/libyuv/LICENSE")
        ;; OpenH264
        license:bsd-2
        ;; PFFFT
        (license:non-copyleft "file:///src/third_party/pffft/LICENSE")
        ;; RnNoise
        license:gpl3
        ;; LibSRTP, LibVPx, UsrSCTP and Others
        license:bsd-3)))))