#!/bin/bash

# script to move a web directory tree in the file system
# and then patch up all references in the URL space.

usage()
{
  echo "usage: `basename $0` destDir"
  echo
  echo "       Recursively moves the entire tree at the cwd to "
  echo "       the destination directory given.  Then updates  "
  echo "       HTML files reflect new location.                "
  echo
  echo "Bugs:  Too numerous to mention, primarily in the design"
  echo "       of the interface and functionality."
}

webRoot="www.cs.washington.edu/"
fsRoot="/cygdrive/d/cse490c/03au/"

# When invoked by the user, we should have exactly one argument.
# When we invoke ourselves, we have 4 (-x file fromURLpattern toURLpattern)

if [ $1 = "-x" ] && [ $# = 4  ]; then
    if [ ! `sed "s,$3,$4," $2 >.webmovetemp` ]; then
	echo "Patched $2"
	mv .webmovetemp $2
    fi
    exit 0

elif [ ! $# = 1 ]; then
    echo "Error: $*"
    usage
    exit 1
fi

cwd=`pwd`
destDir="$1"

if [ -e $destDir ]; then
   echo "Destination direction $destDir already exists."
   exit 2
fi

# we want full path names for everything.  The destination
# directory might be something like "../../newdir".
# So, create it, cd to it, and pwd it.

if [ `mkdir "$destDir"` ]; then
    echo "Couldn't create destination diretory $destDir"
    exit 3
fi

cd $destDir
destDir=`pwd`  # get full path name

# now get out of our own way...
cd $fsRoot

# and copy
rm -r $destDir  # remove dir so cp works as expected
cp -r "$cwd" "$destDir"

# now patch any links
shopt -s extglob  # turn on extglob option of shell
echo "fromURL = $fromURL"
fromURL=`echo "$cwd" | sed "s,$fsRoot,$webRoot,"`
toURL=`echo "$destDir" | sed "s,$fsRoot,$webRoot,"`
echo "toURL = $toURL"
find . \( -name "*.html" -o -name "*.htm" \) -exec "$cwd/$0" -x \{\} "$fromURL" "$toURL" \;

exit 0