#!/bin/bash

# Script to install FFmpeg on GNU/Linux
# Website: https://www.johnvansickle.com/ffmpeg/
# Created by q3aql (q3aql@openmailbox.org)
# Builds by John Van Sickle (john.vansickle@gmail.com)
# Licensed by GPL v.2
# Date: 02-10-2016
# --------------------------------------
VERSION=1.2

URL=https://www.johnvansickle.com/ffmpeg/
URL_RELEASES=https://johnvansickle.com/ffmpeg/releases/
URL_BUILDS=https://johnvansickle.com/ffmpeg/builds/
TMP_DIR=/tmp
PATH_INSTALL=/usr/bin/

# Check if 'user' is 'root'
user=$(whoami)
if [ "$user" == "root" ] ; then
     echo "OK" > /dev/null
else
     echo "You must be root!"
     exit 0
fi

# Detect "kernel" name
KERNEL=$(uname -s)

if   [ $KERNEL == "Linux" ]; then
       KERNEL=linux
else
       echo "Unsupported OS ($KERNEL)"
       exit 0
fi

# Detect "arch" system
archs=`uname -m`
case "$archs" in
    i?86)
         ARCH=32bit
    ;;
    x86_64)
         ARCH=64bit
    ;;
    *)
    echo "Unsupported Arquitecture ($archs)"
    exit 0
esac

#Check if 'curl' is installed. 
  curl --help > /dev/null
  if [ "$?" -eq 0 ] ; then
    echo "OK" > /dev/null
  else
    echo "You must install 'curl'."
  fi
  
# Check available downloaders (wget, axel or aria2c).
  wget --help > /dev/null
  if [ "$?" -eq 0 ] ; then
    APP_DOWNLOAD='wget -c'
    NAME_APP_DOWNLOAD="wget"
  else
    echo "wget disabled"
  fi
  
  axel --help > /dev/null
  if [ "$?" -eq 0 ] ; then
    APP_DOWNLOAD='axel'
    NAME_APP_DOWNLOAD="axel"
  else
    echo "axel disabled"
  fi

  aria2c --help > /dev/null
  if [ "$?" -eq 0 ] ; then
    APP_DOWNLOAD='aria2c --check-certificate=false'
    NAME_APP_DOWNLOAD="aria2c"
  else
    echo "aria2c disabled"
  fi

  if [ "x$APP_DOWNLOAD" = "x" ] ; then
     echo "Error: You must install 'wget' or 'axel' or 'aria2'."
  fi

#Install, update & uninstall FFmpeg
case $1 in

   --install|-install|--update|-update)
     cd $TMP_DIR
     rm -rf ffmpeg-*
     if [ "$2" == "release" ] ; then
       curl $URL | grep "$URL_RELEASES" | cut -d '"' -f 2 | grep "$ARCH" | head -1 > $TMP_DIR/ffmpeg-url
        if [ "$?" -eq 0 ] ; then
            echo "OK" > /dev/null
        else
            echo "Connection problem!"
            echo "Exiting..."
            exit
        fi
     else
       curl $URL | grep "$URL_BUILDS" | cut -d '"' -f 2 | grep "$ARCH" | head -1 > $TMP_DIR/ffmpeg-url
        if [ "$?" -eq 0 ] ; then
            echo "OK" > /dev/null
        else
            echo "Connection problem!"
            echo "Exiting..."
            exit
        fi
     fi
      URL_PACKAGE=`cat $TMP_DIR/ffmpeg-url`
      NAME_PACKAGE=`cat /tmp/ffmpeg-url | cut -d "/" -f 6`
      clear
      echo "Downloading $NAME_PACKAGE ($NAME_APP_DOWNLOAD)"
      $APP_DOWNLOAD $URL_PACKAGE
      if [ "$?" -eq 0 ] ; then
         echo "OK" > /dev/null
      else
         echo "Connection problem!"
         echo "Exiting..."
         exit
      fi
      tar Jxvf $NAME_PACKAGE
      cd ffmpeg-*
      cp -rf ffmpeg $PATH_INSTALL
      cp -rf ffmpeg-10bit $PATH_INSTALL
      cp -rf ffprobe $PATH_INSTALL
      cp -rf ffserver $PATH_INSTALL
      cd ..
      rm -rf ffmpeg-*
      echo "Done!"
      exit 0
   ;;
   --uninstall|-uninstall)
      echo "Uninstalling..."
      sleep 3
      rm -rf /usr/bin/ffmpeg
      rm -rf /usr/bin/ffprobe
      rm -rf /usr/bin/ffserver
      rm -rf /usr/bin/ffmpeg-10bit
      echo "Done!"
   ;;
   --help|-help|-h|*)
      clear
      echo ""
      echo "** ffmpeg-install v.$VERSION **"
      echo ""
      echo "* How to install:"
      echo ""
      echo "  ffmpeg-install --install (Latest git version)"
      echo "  ffmpeg-install --install release (Latest stable version)"
      echo ""
      echo "* How to update:"
      echo ""
      echo "  ffmpeg-install --update (Latest git version)"
      echo "  ffmpeg-install --update release (Latest stable version)"
      echo ""
      echo "* How to uninstall:"
      echo ""
      echo "  ffmpeg-install --uninstall"
      echo ""
      echo "* Show help:"
      echo ""
      echo "  ffmpeg --help"
      echo ""
      exit 0
esac