#!/bin/sh
# Postinst script for Dokuwiki.

set -e

# Create an apache configuration file for dokuwiki
write_apache2_conf()
{
	apacheconf=`mktemp`

	# Get config options
	db_get dokuwiki/system/documentroot
	docroot=$RET;

	cat >> $apacheconf <<-EOF
	AliasMatch ^$docroot/sites/[^/]+$      /usr/share/dokuwiki/
	AliasMatch ^$docroot/sites/[^/]+/(.*)$ /usr/share/dokuwiki/\$1
	Alias      $docroot                    /usr/share/dokuwiki/
	EOF

	# Print directory options for /usr/share/dokuwiki
	cat >> $apacheconf <<-EOF

	<Directory /usr/share/dokuwiki/>
		Options +FollowSymLinks
		AllowOverride All
		order allow,deny
	EOF

	db_get dokuwiki/system/accessible
	if [ "$RET" = "global" ]; then  # Globally accessible
		echo "	Allow from all" >> $apacheconf
	elif [ "$RET" = "localhost only" ]; then  # Access only from localhost
		echo "	Allow from localhost 127.0.0.1 ::1" >> $apacheconf
	else  # Access from localnet
		db_get dokuwiki/system/localnet
		echo "	Allow from localhost 127.0.0.1 ::1" >> $apacheconf
		echo "	Allow from $RET" >> $apacheconf
	fi

	cat >> $apacheconf <<-EOF

	        <IfModule mod_rewrite.c>

	                # Uncomment to implement server-side URL rewriting
	                # (cf. <http://www.dokuwiki.org/config:userewrite>).
                        # Do *not* mix that with multisite!
	                #RewriteEngine on
	                #RewriteBase /$docroot
	                #RewriteRule ^lib                      - [L]
	                #RewriteRule ^doku.php                 - [L]
	                #RewriteRule ^feed.php                 - [L]
	                #RewriteRule ^_media/(.*)              lib/exe/fetch.php?media=\$1  [QSA,L]
	                #RewriteRule ^_detail/(.*)             lib/exe/detail.php?media=\$1 [QSA,L]
	                #RewriteRule ^_export/([^/]+)/(.*)     doku.php?do=export_\$1&id=\$2 [QSA,L]
	                #RewriteRule ^$                        doku.php  [L]
	                #RewriteRule (.*)                      doku.php?id=\$1  [QSA,L]
	        </IfModule>
	</Directory>

	<Directory /usr/share/dokuwiki/bin>
	        Require all denied
	</Directory>

	<Directory /var/lib/dokuwiki/data>
	        Require all denied
	</Directory>
	EOF

	ucf --debconf-ok $apacheconf /etc/dokuwiki/apache.conf
	ucfr dokuwiki /etc/dokuwiki/apache.conf

	# Remove temporary file
	rm $apacheconf;

	if [ -e /etc/dokuwiki/apache.conf ]; then
		chmod 0644 /etc/dokuwiki/apache.conf
	fi
}


# Create a local dokuwiki configuration file
write_dokuwiki_conf()
{
	dokuwikiconf=$(mktemp)

	cat >> $dokuwikiconf << EOF
<?php
/**
 * Dokuwiki's Main Configuration File - Local Settings
 * Auto-generated by Debian postinst script
 */

EOF

	db_get dokuwiki/wiki/title
	title="$(printf "%s" "$RET" | sed -e 's/\\/\\\\/g;'"s/'/\\\\'/g")"
	echo "\$conf['title'] = '$title';" >> $dokuwikiconf

	db_get dokuwiki/wiki/license
	case "$RET" in
		"")
			LICENSE="$RET"
			;;

		none)
			LICENSE=""
			;;
	esac
	echo "\$conf['license'] = '$LICENSE';" >> $dokuwikiconf

	echo "#\$conf['lang'] = 'en';" >> $dokuwikiconf

	db_get dokuwiki/wiki/acl
	if [ "$RET" = "true" ]; then
		echo "\$conf['useacl'] = 1;" >> $dokuwikiconf
		echo "\$conf['superuser'] = '@admin';" >> $dokuwikiconf
	fi

	ucf --debconf-ok $dokuwikiconf /etc/dokuwiki/local.php
	ucfr dokuwiki /etc/dokuwiki/local.php

	# Remove temporary file
	rm $dokuwikiconf

	if [ -e /etc/dokuwiki/local.php ]; then
		chmod 0644 /etc/dokuwiki/local.php
	fi

	# Set permissions according to the user's wishes
	db_get dokuwiki/system/writeconf
	if [ "$RET" = "true" ]; then
		if [ -e /etc/dokuwiki/local.php ]; then
			chown root:www-data /etc/dokuwiki/local.php
			chmod 0664 /etc/dokuwiki/local.php
			if ! dpkg-statoverride --list /etc/dokuwiki >/dev/null 2>&1; then
				dpkg-statoverride --update --add root www-data 0775 /etc/dokuwiki
			fi
		fi
	fi
	db_get dokuwiki/system/writeplugins
	if [ "$RET" = "true" ]; then
		if ! dpkg-statoverride --list /var/lib/dokuwiki/lib/plugins >/dev/null 2>&1; then
			dpkg-statoverride --update --add root www-data 0775 /var/lib/dokuwiki/lib/plugins
		fi
	fi
}

# Set up an initial access control system
setup_acl()
{
	# Do not touch ACLs of existing installationq
	if [ ! -e /var/lib/dokuwiki/acl/acl.auth.php ]; then
		aclauth=`mktemp`

		cat >> $aclauth << EOF
# acl.auth.php
# <?php exit()?>
# Don't modify the lines above
#
# Access Control Lists
#
# Auto-generated by Debian postinst script

EOF

		db_get dokuwiki/wiki/policy
		if [ "$RET" = "closed" ]; then
			echo "*               @ALL          0" >> $aclauth
			echo "*               @user         8" >> $aclauth
		elif [ "$RET" = "public" ]; then
			echo "*               @ALL          1" >> $aclauth
			echo "*               @user         8" >> $aclauth
		else
			echo "*               @ALL          8" >> $aclauth
		fi

		ucf --debconf-ok $aclauth /var/lib/dokuwiki/acl/acl.auth.php
		ucfr dokuwiki /var/lib/dokuwiki/acl/acl.auth.php

		# Remove temporary file
		rm $aclauth;

		if [ -e /var/lib/dokuwiki/acl/acl.auth.php ]; then
			chown www-data:root /var/lib/dokuwiki/acl/acl.auth.php
		fi
	fi
}

# Set up an initial administrator account
setup_superuser()
{
	# Do not touch user lists of existing installations
	if [ ! -e /var/lib/dokuwiki/acl/users.auth.php ]; then
		usersauth=`mktemp`

		db_get dokuwiki/wiki/superuser
		superuser="$RET"
		db_get dokuwiki/wiki/fullname
		fullname="$RET"
		db_get dokuwiki/wiki/email
		email="$RET"
		db_get dokuwiki/wiki/password
		password="$RET"
		db_set dokuwiki/wiki/password ""
		db_set dokuwiki/wiki/confirm ""

		if [ -n "${password}" ]
		then
			password=$(echo -n "$password" | md5sum -b | cut -d' ' -f1)
			echo "$superuser:$password:$fullname:$email:admin,user" >> $usersauth

			ucf --debconf-ok $usersauth /var/lib/dokuwiki/acl/users.auth.php
			ucfr dokuwiki /var/lib/dokuwiki/acl/users.auth.php

			# Remove temporary file
			rm $usersauth;
		fi

		if [ -e /var/lib/dokuwiki/acl/users.auth.php ]; then
			chown www-data:root /var/lib/dokuwiki/acl/users.auth.php
		fi
	fi
}

# Create a .htaccess sample file for dokuwiki
write_htaccess()
{
	# Restore the backup of the .htaccess that used to be part of the
	# package and would have been lost. See preinst.
	if [ -f /usr/share/dokuwiki/.htaccess.upgrade ]
	then
		mv /usr/share/dokuwiki/.htaccess.upgrade /etc/dokuwiki/htaccess
	fi

	# A previous versions of this script, 0.0.20091225c-4, used to restore the
	# backup *after* ucf. As this erased the following official modification
	# after ucf, let us make it back before ucf.
	if [ -e /etc/dokuwiki/local.php -a -f /etc/dokuwiki/htaccess ]; then
		sed -i -e '/^php_value auto_prepend_file "\/usr\/share\/dokuwiki\/prepend.php"$/,+1d' /etc/dokuwiki/htaccess
	fi

	ucfr dokuwiki /etc/dokuwiki/htaccess
	ucf --debconf-ok /usr/share/dokuwiki/.htaccess.dist /etc/dokuwiki/htaccess
}

# Configure Apache web servers (possibly version 1.3 or 2.x?)
configure_apache2()
{
	# Remove old configuration symlink for apache 2.2
	if [ -e /etc/apache2/conf.d/dokuwiki.conf ]
	then
		rm /etc/apache2/conf.d/dokuwiki.conf
	fi
	# Remove possible user compatibility symlink for apache 2.4
	if [ -h /etc/apache2/conf-available/dokuwiki.conf ]
	then
		rm /etc/apache2/conf-available/dokuwiki.conf
	fi
	if [ -d /etc/apache2/conf-available -a ! -e /etc/apache2/conf-available/dokuwiki.conf ]
	then
		ln -s /etc/dokuwiki/apache.conf /etc/apache2/conf-available/dokuwiki.conf
		if [ -e /usr/share/apache2/apache2-maintscript-helper ]
		then
			. /usr/share/apache2/apache2-maintscript-helper
			apache2_invoke enconf dokuwiki
		fi
	fi
}


# Configure requested web server
configure_webservers()
{
	db_get dokuwiki/system/configure-webserver
	webservers="$RET"
	write_apache2_conf
	for webserver in $webservers; do
		webserver=${webserver%,}
		# Note: configure_apache2 uses functions from
		# /usr/share/apache2/apache2-maintscript-helper, which require an
		# unmodified environment, including maintainer script arguments "$@"
		configure_$webserver "$@"
	done
}

if [ $1 = "configure" ]; then
	. /usr/share/debconf/confmodule

	write_htaccess
	write_dokuwiki_conf
	db_get dokuwiki/wiki/acl
	if [ "$RET" = "true" ]; then
		setup_acl
		db_get dokuwiki/wiki/superuser
		if [ ! -z "$RET" ]; then
			setup_superuser
		fi
	fi
	# Note: configure_webservers uses functions from
	# /usr/share/apache2/apache2-maintscript-helper, which require an
	# unmodified environment, including maintainer script arguments "$@"
	configure_webservers "$@"

	db_stop

	if [ -d /var/lib/dokuwiki/farm/ ]; then
		for d in /var/lib/dokuwiki/farm/*/data/ ; do
			# Catch case where /var/lib/dokuwiki/farm/ exists, but is
			# empty and hence the wildcard is passed literally.
			if [ -d "$d" ]; then
				install -d -o www-data -g root -m 0700 "$d/log"
			fi
		done
	fi

fi

#DEBHELPER#