terminal

#!/bin/bash
ALIAS_FILE=~/.term_sharedAliases

main() {
  case $1 in
    start|list|connect|stop|setup|setupAliases)
      $1 ${@:2}
    ;;
    *)
      help
    ;;
  esac
}

start() {
  name=$1
  commands=${@:2}
  previous=$(findByName $name)

  if [ -z "$previous" ]; then
    screen -dmS $name
  
    if [ -z "$commands" ];then
      screen -rx $name
    else
      screen -rx $name bash $commands
    fi
  else
    connect $previous
  fi
}

list() {
  screen -ls
}

connect() {
  screen -rx $1
}

stop() {
  name=$(findByName $1)
  if [ -z "$name" ]; then
    echo No running session for \"$1\"
  else
    screen -X -S $name quit
  fi
}

findByName() {
  echo $(screen -ls | grep -m 1 -oEi "(\w+\.$1)")
}

setup() {
  sudo apt-get -y install screen
}

setupAliases() {
  createAliasFile
  setupAliases_onFile ~/.bashrc
  setupAliases_onFile ~/.zshrc
}

createAliasFile() {
  echo Creating alias file for shared terminal \"$ALIAS_FILE\"
  cat >$ALIAS_FILE<<TEXT
#if [ -z "\$STY" ] && [ "\$SSH_CONNECTION" != "" ]; then
#    screen -x shared
##    tmux attach-session -t ssh || tmux new-session -s ssh
#    exit
#fi
function exit {
  if [ -z "\$STY" ] ; then
    builtin exit
  else
    echo This commands is disabled during terminal sharing.
    echo If you want to quit and close all connections use
    echo  screen -x quit
    echo If you just want to deatach use keyboard shotcut:
    echo  [ctrl] + [a] + [v]
  fi
}
TEXT
}

setupAliases_onFile() {
  echo Setting up import on \"$1\".
  if [ -f $1 ]; then
    cat >>$1<<TEXT
if [ -f $ALIAS_FILE ]; then
  . ~/.term_sharedAliases
fi
TEXT
  else
    echo File \"$1\" not found.
  fi
}

help() {
  cat <<TEXT
Terminal sharing

Commands:
 start <name> [commands [args]]
  - start a new terminal with given name. This will allow others to connect to the same terminal.

 list
  - list shared terminals.

 connect <name>
  - connect o a terminal with given name.

 stop <name>
  - stop a running shared terminal.

 setup
  - install needed tools

TEXT
}

main $@