bunkdeck/bunkdeck

#!/bin/sh -e

sessionname=bunkdeck
heedPane=bunkdeck:0.0
proclaimPane=bunkdeck:0.1
shellPane=bunkdeck:0.2

isExistingDeck () {
    if tmux has -t $sessionname ; then
		    return 0
    else
		    return 1
	  fi
}

attachToDeck () {
    # does not currently protect against nesting sessions (tmux does this for us)
    tmux attach-session -d -t bunkdeck
}

startNewDeck () {
	  tmux new -d -s $sessionname heed
	  tmux split-window -h -t $sessionname -p 70
	  tmux split-window -t $heedPane -v -p 3
	  tmux send-keys -t $proclaimPane 'proclaim' C-m
	  tmux send-keys -t $shellPane 'cowsay "press [CTRL+b then o] to cycle through panes"' C-m
	  # turn on pane titling
	  tmux select-pane -t $heedPane -T heed
	  tmux select-pane -t $proclaimPane -T proclaim
	  tmux select-pane -t $shellPane -T shell
	  tmux set -g set-titles on
	  # attach session to shell
	  tmux attach -t $shellPane
}

killDeck () {
    if isExistingDeck; then
        tmux kill-session -t $sessionname
    else
        echo "you don't have bunkdeck running!"
    fi
}

leaveDeck () {
    # currently assumes that bunkdeck is only session running
    # if bunkdeck leave is issued from within another session, silent failure occurs
    if isExistingDeck && [ "${TMUX}" != "" ]; then
        tmux detach -s $sessionname
        echo "you are not inside bunkdeck! for help:"
        echo "$ bunkdeck help"
    fi
}

growPane () {
	  case $2 in
		    shell)
			      tmux resize-pane -t $shellPane -L "$3"
		        ;;
		    proclaim)
			      tmux resize-pane -t $proclaimPane -U "$3"
		        ;;
		    heed)
			      tmux resize-pane -t $heedPane -D "$3"
		        ;;
		    *)
			      echo "usage: bunkdeck grow [WINDOW] [SIZE]"
			      echo
			      echo "windows:"
			      echo "  shell         horizontally grow the shell window"
			      echo "  proclaim      vertically grow the window where you send text"
			      echo "  heed          vertically grow the window where you read texts"
		       	echo
			      echo "size:"
			      echo "  number of cells to grow the selected window"
			      exit 1
		        ;;
	  esac
}

shrinkPane () {
	  case $2 in
		    shell)
			      tmux resize-pane -t $shellPane -R "$3"
		        ;;
		    proclaim)
			      tmux resize-pane -t $proclaimPane -D "$3"
		        ;;
		    heed)
			      tmux resize-pane -t $heedPane -U "$3"
		        ;;
		    *)
			      echo "usage: bunkdeck shrink [WINDOW] [SIZE]"
			      echo
			      echo "windows:"
			      echo "  shell         horizontally shrink the shell window"
			      echo "  proclaim      vertically shrink the window where you send text"
			      echo "  heed          vertically shrink the window where you read texts"
		       	echo
			      echo "size:"
			      echo "  number of cells to shrink the selected window"
			      exit 1
		        ;;
	  esac
}

helpText () {
    usageText
    echo
    echo "help:"
    echo
    echo "  movement:"
    echo "    bunkdeck gives you three panes, 'proclaim' to chat, 'heed' to read chats"
    echo "    and 'shell' to do whatever you want!"
    echo "    to move between panes you press [CTL + b] at the same time"
    echo "    then [arrow key] to move to a new pane, or 'o' to cycle around"
}

usageText () {
		echo "usage: bunkdeck [COMMAND]"
		echo
		echo "commands:"
		echo "  (none)      attach to existing bunkdeck or start new one"
		echo "  kill        kill running bunkdeck"
    echo "  leave       close bunkdeck without killing it"
    echo "  grow        grow the size of a bunkdeck window"
		echo "  shrink      shrink the size of a bunkdeck window"
}

case $1 in

	  kill)
		    killDeck
	      ;;
	  "")
		    if isExistingDeck; then
			      attachToDeck
		    else
			      startNewDeck
		    fi
	      ;;
    leave)
        leaveDeck
        ;;
	  grow)
		    growPane "$@"
	      ;;
	  shrink)
		    shrinkPane "$@"
	      ;;
    help)
        helpText
        ;;
	  *)
        usageText
        ;;
esac