#!/bin/sh

set -e

# Default to "yes"
AUTOMATIC_TRANSLATIONS_UPDATE="yes"

. /usr/share/debconf/confmodule

# Read configuration variable file if it is present
CONFIG=/etc/koha/koha-common.conf
if [ -r $CONFIG ]; then
    . $CONFIG
fi

conf=/etc/mysql/koha-common.cnf
if [ ! -e "$conf" ] && [ ! -L "$conf" ]
then
    ln -s debian.cnf "$conf"
fi

#DEBHELPER#

koha-upgrade-schema $(koha-list)

# Generate a config file if one doesn't exist already
if [ ! -e $CONFIG ]; then
    cat <<EOF > $CONFIG
## Automatic template translation update
#
# This variable controls whether template translations should
# be updated automatically on koha-common package upgrades.
# Options: 'yes' (default)
#          'no'
# Note: if you choose 'no' then you will have to issue
#  $ koha-translate --update <lang_code>
#
AUTOMATIC_TRANSLATIONS_UPDATE="yes"
EOF
fi

# Substitute the values from debconf into the file.
db_get koha-common/automatically-update-translations
UPDATE="$RET"
if [ "$UPDATE" = "false" ]; then
    UPDATE="no"
else
    UPDATE="yes"
fi
# In case they were removed/commented out, we add it in.
grep -Eq '^ *AUTOMATIC_TRANSLATIONS_UPDATE=' $CONFIG || \
    echo "AUTOMATIC_TRANSLATIONS_UPDATE=" >> $CONFIG

sed -e "s/^ *AUTOMATIC_TRANSLATIONS_UPDATE=.*/AUTOMATIC_TRANSLATIONS_UPDATE=\"$UPDATE\"/" < $CONFIG > $CONFIG.tmp
mv -f $CONFIG.tmp $CONFIG

if [ "$AUTOMATIC_TRANSLATIONS_UPDATE" = "yes" ]; then
    for lang in $(koha-translate --list | grep -v -x "en"); do
        if koha-translate --update $lang; then
            echo "Updated the $lang translations."
        else
            cat <<EOF >&2
ERROR: an error was found when updating '$lang' translations. Please manually
run 'koha-translate --update $lang'. Run man koha-translate for more options.
EOF
        fi
    done
else
    # no auto-update, check update needed and warn if needed
    if koha-translate --list | grep -v -q -x "en"; then
        # translations installed, update needed
        cat <<EOF >&2
Warning: template translations are not set to be automatically updated.
Please manually run 'koha-translate --update lang_code' to update them.

You can run 'koha-translate --list' to get a list of the installed translations codes.
EOF
    fi
fi

# Check if we need to rename the Apache vhost files
RENAME_APACHE_FILES="no"
for vhost in $(koha-list); do
    if [ -f "/etc/apache2/sites-available/$vhost" ] && \
       [ ! -f "/etc/apache2/sites-available/$vhost.conf" ]; then
       RENAME_APACHE_FILES="yes"
       break # at least one, trigger renaming
    fi
done

if [ "$RENAME_APACHE_FILES" = "yes" ]; then
    # If the user agreed we now rename their Apache files
    db_get koha-common/rename-apache-vhost-files
    if [ "$RET" = "false" ]; then
        # We're not renaming the files, just print a warning
        cat <<EOF >&2
Warning: you have chosen not to migrate your Apache virtual hosts files to the
Apache 2.4 naming schema. You can do it manually by running this for each
Koha instance:

    $ sudo a2dissite instance
    $ sudo mv /etc/apache2/sites-available/instance \
              /etc/apache2/sites-available/instance.conf
    $ sudo a2ensite instance
EOF
    else
        # We have to rename the Apache files
        for site in $(koha-list); do
            ENABLE_VHOST="yes"
            if [ -f "/etc/apache2/sites-available/$site" ] && \
               [ ! -f "/etc/apache2/sites-available/$site.conf" ]; then
                if [ ! -f "/etc/apache2/sites-enabled/$site" ]; then
                    ENABLE_VHOST="no"
                fi
                a2dissite $site > /dev/null 2>&1 || true
                rm -f "/etc/apache2/sites-enabled/$site"
                # Rename the vhost definition files
                mv "/etc/apache2/sites-available/$site" \
                   "/etc/apache2/sites-available/$site.conf"

                if [ "$ENABLE_VHOST" = "yes" ]; then
                    if ! {
                        a2ensite "$site" > /dev/null 2>&1 ||
                        a2ensite "${site}.conf" > /dev/null 2>&1
                    }; then
                        echo "Warning: problem enabling $site in Apache" >&2
                    fi
                fi
            fi
        done
    fi
fi

# Bug 14106 - fix the modulePath of existing koha instances so that it'll
# continue to work. This will only patch the files if the exact original string
# that we're fixing them from is there, so we just run it every time. Maybe
# in many years time we can get rid of this, when no one will be running
# Koha < 3.20.
for zfile in $( find /etc/koha/sites -name zebra-authorities.cfg -or -name zebra-authorities-dom.cfg -or -name zebra-biblios.cfg -or -name zebra-biblios-dom.cfg ); do
    perl -p -i -e 's{^modulePath: /usr/lib/idzebra-2.0/modules$}{modulePath: /usr/lib/idzebra-2.0/modules:/usr/lib/x86_64-linux-gnu/idzebra-2.0/modules:/usr/lib/i386-linux-gnu/idzebra-2.0/modules:/usr/lib/aarch64-linux-gnu/idzebra-2.0/modules:/usr/lib/arm-linux-gnueabi/idzebra-2.0/modules:/usr/lib/arm-linux-gnueabihf/idzebra-2.0/modules:/usr/lib/mips-linux-gnu/idzebra-2.0/modules:/usr/lib/mipsel-linux-gnu/idzebra-2.0/modules:/usr/lib/powerpc-linux-gnu/idzebra-2.0/modules:/usr/lib/powerpc64le-linux-gnu/idzebra-2.0/modules:/usr/lib/s390x-linux-gnu/idzebra-2.0/modules}' $zfile
done

db_stop

exit 0