#!/bin/bash

me=${0##*/}

usage()
{
    exec 1>&2
cat <<-EOF
usage: from within vi, use:
  !!$me {<mh-message-args>|<filename>} ...
  Invoke while positioned on the header/message separation line, which
   should look something like \"-------:\" (and which will be
   duplicated in the output).
  Inserts 'Attach:' headers for all of the given filenames or MH
   messages specifiers (but not both -- invoke twice instead).
EOF

    exit 1
}

case "$1" in
    -*|"") usage ;;
esac

read inputline
if echo "$inputline" | grep -qv '^-\+-:$'
then
    echo 'Error:  run this only on the "------:" header separator line.'
    exit 1
fi

curfold=$(folder -fast)

# arrange to emit the separator line and restore current folder on exit
trap 'echo "$inputline"; test "$chfold" && folder +$curfold >/dev/null' 0

# first get a +folder arg
for a in "$@"
do
    case $a in
    address@hidden)
	if [ "$chfold" ]
	then
	    echo "$me: only one folder at a time!"
	    exit 1
	fi
	folder $a >/dev/null || exit 1
	chfold=true
	mh=true
	;;
    esac
done

# check each arg as a valid msg spec
# i'd like to just run:
#   pick -noseq "$@" >/dev/null 2>&1 && mh=true
# but this will fail for "cur" if cur isn't valid.

for a in "$@"
do
    case $a in
    cur|cur[:=-]*)
	pick -noseq $a >/dev/null || exit 1
	mh=true
	;;
    *) 
	if pick -noseq $a >/dev/null 2>&1
	then
	    mh=true
	else
	    not_mh="$a"
	    break
	fi
	;;
    esac
done

if [ "$mh" -a "$not_mh" ]
then
    echo "** Don't mix pathnames and MH message specifiers: '$a' **"
    exit 1
fi


if  [ "$mh" ]  # we've got message specifiers
then
    mhpath "$@" | sed 's/^/Attach: /'
    exit 0
    # can't use 'mhpath "$@"' because we want to check existence
    for p in $(mhpath "$@")
    do
	if [ -e $p ]
	then
	    echo "Attach: $p"
	else
	    echo "** No such message '$p' **"
	    exit 1
	fi
    done
    exit 0
else
    # we've got files
    for f in "$@"
    do
	if [ -f $f  ]
	then
	    echo "Attach: $f"
	else
	    if [ -e $f  ]
	    then
		echo "** Not a regular file: '$f' **"
	    else
		echo "** No such file: '$f' **"
	    fi
	    #exit 1
	fi
	continue
    done
fi

exit 0