#!/bin/bash

# Make sure we're running through sudo
export me=`whoami`
if [ "$me" != 'root' ]; then
	echo "I don't like $me very much. Please run me via sudo.";
	exit -1;
fi

# Save some paths for reference
export wpmu_base='/path/to/WPMU'
export const="$wpmu_base/const"

#Make sure we have something to do
if [ "$1" == '' ]; then
	echo "Let's find out what we can do; downloading latest version...";
	# Ideally, we'd fetch a text file with the latest version number before downloading.
	rm -f latest.zip
	curl -O http://mu.wordpress.org/latest.zip
	
	#List the files, finding our version number.
	export version=`unzip -l ./latest.zip | grep -E 'wordpress-mu-([0-9]*\.[0-9]*\.[0-9]*)' -m 1 -o`
	echo "$version downloaded...";
	
	#Check to see if we already have it
	if [ -a $wpmu_base/$latest/ ]; then
		echo "... and you've already got it. Bye!";
		exit -2;
	fi
	
	# Expand the latest version
	unzip ./latest.zip -d $wpmu_base;
	# Make a note of where it is
	export latest="$wpmu_base/$latest";
else
	echo "We'll be working with WPMU $1 today...";
	# And make sure that the necessary WP download exists
	if [ -a ./wordpress-mu-$1.zip ]; then
		echo "... and I see that you were smart enough to download it.";

		# Expand latest WPMU version, version passed as command argument (eg $1)
		unzip ./wordpress-mu-$1.zip -d $wpmu_base/;
		# Make sure we note where it is
		export latest="$wpmu_base/wordpress-mu-$1";
	else
		echo "... and it is nowhere to be seen! I cannot work under these conditions!";
		exit -3;
	fi
fi

# Reset the owner on all of our new files
chown -R administrator:admin $latest

# Link wp-config file
ln -fhs $const/wp-config.php $latest/wp-config.php
# Link .htaccess file
ln -fhs $const/.htaccess $latest/.htaccess
# Link mu-plugins directory
rm -R $latest/wp-content/mu-plugins
ln -fhs $const/wp-content/mu-plugins $latest/wp-content/mu-plugins
# Link plugins directory
rm -R $latest/wp-content/plugins
ln -fhs $const/wp-content/plugins $latest/wp-content/plugins
# Link blogs.dir directory
ln -fhs $const/wp-content/blogs.dir $latest/wp-content/blogs.dir
# Link sunrise file
ln -fhs $const/wp-content/sunrise.php $latest/wp-content/sunrise.php
# Link each theme in themes folder
for theme in `ls -d $const/wp-content/themes/*`; do
	echo "*** Copying theme from $theme"
	ln -fhs $theme $latest/wp-content/themes/
done

# Link Gallery2 data folder
ln -fhs $const/gallery2/ $latest/gallery2
# Link Gallery2 core folder
ln -fhs $const/gallery2_core/ $latest/gallery2_core

# Link WPMU version to current folder
ln -fhs $latest/ $wpmu_base/current