#!/bin/sh
set -eu

if [ $# != 1 ]; then
  echo >&2 E: Need exactly one argument.
  return 1
fi

TSK="$1"

DATA="$(task _get "$TSK".data)"
DATATYPE="${DATA%%:*}"
DATAPAYL="${DATA#*:}"

case "$DATATYPE" in
  ('')
    echo >&2 I: No link data available for this task.
    task "$TSK"
    ;;

  (msgid)
    mutt -f =store -e "push '<search>~i $DATAPAYL'<enter>"
    ;;

  (url)
    sensible-browser "$DATAPAYL"
    ;;

  (file)
    if eval test -f "$DATAPAYL"; then
      case "$(file --mime-type "$DATAPAYL")" in
        (*": text/"*) eval sensible-editor "$DATAPAYL";;
        (*) eval run-mailcap --action=edit "$DATAPAYL";;
      esac
    fi
    ;;

  (*)
    eval run-mailcap --action=edit "$DATAPAYL"
    ;;

esac