#!/bin/bash

# This file is part of Megatest.
# 
#     Megatest is free software: you can redistribute it and/or modify
#     it under the terms of the GNU General Public License as published by
#     the Free Software Foundation, either version 3 of the License, or
#     (at your option) any later version.
# 
#     Megatest is distributed in the hope that it will be useful,
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#     GNU General Public License for more details.
# 
#     You should have received a copy of the GNU General Public License
#     along with Megatest.  If not, see <http://www.gnu.org/licenses/>.

wikiname=$1
FOSSILBIN=fossil

if [ x"$wikiname" == "x" ];then
  echo "Usage: viwiki wikipagename"
  exit
fi

$FOSSILBIN sync

# wikitmpfile=`mktemp /tmp/${USER}_wikiedit.XXXXXXX`
wikitmpfile=${wikiname}.in

if ! $FOSSILBIN wiki export "$wikiname" 2> /dev/null  1> $wikitmpfile ;then
    cat /dev/null > $wikitmpfile
    wikipagestate='new'
else
    wikipagestate='existing'
fi

# make a backup copy of the extracted file to diff detect if changed
cp $wikitmpfile ${wikitmpfile}.orig

if [[ x"$EDITOR" == "x" ]];then #  || [[ x"$VISUAL" == "x" ]];then
    EDITOR="gvim -f"
fi

echo $EDITOR | grep -q -e gvim
isGvim=$?

echo $EDITOR | grep -q -e 'gvim.*-f'
hasF=$?

if [[ $isGvim == 0 && $hasF != 0 ]]; then
	EDITOR="$EDITOR -f"
fi

$EDITOR $wikitmpfile

if ! diff -q $wikitmpfile ${wikitmpfile}.orig;then
    echo "Saving changes to $wikitmpfile to wiki"
    if [ $wikipagestate == 'new' ];then
        $FOSSILBIN wiki create "$wikiname" $wikitmpfile
    else
        $FOSSILBIN wiki commit "$wikiname" $wikitmpfile
    fi
else
    echo "Not saving, no changes to $wikitmpfile."
fi

$FOSSILBIN sync

# NOTE// We *keep* the wikitmpfile but remove the orig copy
rm -f ${wikitmpfile}.orig
