#!/bin/sh

set -e

[ "$DEBIAN_SCRIPT_DEBUG" ] && set -vx

case "$1" in
    configure)
    # continue below
    ;;

    abort-upgrade|abort-remove|abort-deconfigure)
    exit 0
    ;;

    *)
    echo "postinst called with unknown argument \`$1'" >&2
    exit 0
    ;;
esac


# Load debconf
. /usr/share/debconf/confmodule

# Include CARNet functions
. /usr/share/carnet-tools/functions.sh

PKG="php7.0-cn"
A2MODEDIR="/etc/apache2/mods-enabled"
### mysql je vec ukljucen u wheezyu
### EXTENSIONS="mysql"
EXTENSIONS=""
PHP70DIR="/etc/php/7.0"
PHP70MODADIR="$PHP70DIR/mods-available"
PHP70CONFD="/etc/php/7.0/conf.d"
PHP5DIR="/etc/php5"

need_restart=0


# phpmemlimit ()
#
#   Calculate memory size for PHP memory_limit option.
#
phpmemlimit () {

    local memtotal memlimit
    memtotal=`awk 'tolower($1) == "memtotal:" { printf("%i", $2/1024); }' /proc/meminfo`

    if [ $memtotal -lt 512 ]; then memlimit=16; fi
    if [ $memtotal -ge 512 ]; then memlimit=32; fi
    if [ $memtotal -gt 1024 ]; then memlimit=64; fi

    echo $memlimit
}

# phpinivalidate ()
#
#   Validate php.ini values.
#
phpinivalidate () {

    local ini_file
    ini_file="$1"

    awk -F'[[:space:]]*=[[:space:]]*' \
        '/^[[:space:]]*[[:alpha:]_]+[[:space:]]*=[[:space:]]*[[:digit:]]+[MGK]B/ {print $1" = "$2}' \
        "$ini_file"
}


# Disable PHP5 module and enable Apache2 PHP7 module.
#
if [ -e /etc/apache2/apache2.conf ]; then
    if [ -e "$A2MODEDIR/php5.load" ]; then
        cp_echo "CN: Disabling PHP5 module for Apache2 web server"
        a2dismod php5 >/dev/null || true
        need_restart=1
    fi
    if [ ! -e "$A2MODEDIR/php7.0.load" ] || [ ! -e "$A2MODEDIR/php7.0.conf" ]; then
        cp_echo "CN: Enabling PHP7 module for Apache2 web server"
        a2enmod php7.0 >/dev/null || true

        if [ -e "$A2MODEDIR/php7.0.conf" ]; then
            if egrep -qi "^[[:space:]]*php_admin_value engine Off" "$A2MODEDIR/php7.0.conf"; then
                db_fset php7.0-cn/userdir seen false
                db_title php7.0-cn - konfiguracija
                db_subst php7.0-cn/userdir php70_conf "$A2MODEDIR/php5.conf"
                db_input critical php7.0-cn/userdir || true
                db_go || true
            fi
        fi

        need_restart=1
    fi
fi


# Check for PHP7 SAPI directories and configuration files.
#
for SAPI in apache2 cli; do

    if [ ! -d "$PHP70DIR/$SAPI" ]; then
        cp_echo "CN: Creating configuration directory $PHP70DIR/$SAPI/"
        mkdir -p $PHP70DIR/$SAPI/
    fi

    ini_file="$PHP70DIR/$SAPI/php.ini"

    if [ ! -f "$ini_file" ]; then

        cp_echo "CN: Generating configuration file $ini_file"

        ini_file_tmp=`mktemp $ini_file.tmp.XXXXXX`
        if [ "$SAPI" = "cli" ]; then
            if [ -f "/usr/lib/php/7.0/php.ini-production.cli" ]; then
                cat /usr/lib/php/7.0/php.ini-production.cli > $ini_file_tmp
            fi
        else
            if [ -f "/usr/lib/php/7.0/php.ini-production" ]; then
                cat /usr/lib/php/7.0/php.ini-production > $ini_file_tmp
            fi
        fi
        cp_mv $ini_file_tmp $ini_file
        need_restart=1
    fi
    chmod 644 $ini_file
done


# Check for /etc/php/7.0/conf.d/ directory.
#
if [ ! -d "$PHP70CONFD" ]; then
    cp_echo "CN: Creating configuration directory $PHP70CONFD"
    mkdir -p $PHP70CONFD/
fi

# Brisanje obsolete datoteke mysql.ini u $PHP70CONFD
#
if [ -f "$PHP70CONFD/mysql.ini" ]; then
	# just to make sure mysql is included in _new-style_ configuration
	if [ -f "$PHP70MODADIR/mysql.ini" ]; then
		cp_echo "CN: Removing obsolete $PHP70CONFD/mysql.ini"
		rm -f $PHP70CONFD/mysql.ini
	else
		cp_echo "CN: WARNING: Obsolete $PHP70CONFD/mysql.ini present, and no $PHP70MODADIR/mysql.ini!"
	fi
fi

# Check if PHP7 extensions are enabled.
#
for php70ext in $EXTENSIONS; do

    php70ext_re="^[[:space:]]*extension[[:space:]]*=[[:space:]]*$php70ext\.so"

    # Remove extension entry from /etc/php/7.0/(apache2|cli).ini
    # configuration files.
    for SAPI in apache2 cli; do

        ini_file="$PHP70DIR/$SAPI/php.ini"

        if [ -f "$ini_file" ]; then

            if egrep -q "$php70ext_re" "$ini_file"; then
                cp_echo "CN: Removing $php70ext extension from file $ini_file"
            fi

            cp_check_and_sed "$php70ext_re" \
                "/$php70ext_re/d" \
                "$ini_file" && need_restart=1 || true
        fi
    done

    # Check extension configuration in /etc/php/7.0/conf.d/ directory.
    if [ ! -f "$PHP70CONFD/$php70ext.ini" ]; then

        cp_echo "CN: Creating configuration file $PHP70CONFD/$php70ext.ini"

        php5ext_up=`echo $php70ext | tr [:lower:] [:upper:] | sed 's/Y/y/'`
        INITMP=`mktemp $PHP70CONFD/$php70ext.ini.tmp.XXXXXX`

        cp_echo "CN: Adding $php70ext extension to file $PHP70CONFD/$php70ext.ini"

        printf "# configuration for php %s module\nextension=%s.so\n" "${php70ext_up}" "${php5ext}" >> "$INITMP"
        cp_mv "$INITMP" "$PHP70CONFD/$php70ext.ini"

        need_restart=1
    else

        if ! grep -q "$php70ext_re" "$PHP70CONFD/$php70ext.ini"; then

            cp_echo "CN: Adding $php70ext extension to file $PHP70CONFD/$php70ext.ini"

            INITMP=`mktemp $PHP70CONFD/$php70ext.ini.tmp.XXXXXX`
            cat "$PHP70CONFD/$php70ext.ini" > "$INITMP"
            echo "extension=$php70ext.so" >> "$INITMP"
            cp_mv "$INITMP" "$PHP70CONFD/$php70ext.ini"

            need_restart=1
        fi
    fi
    chmod 644 $PHP70CONFD/$php70ext.ini
done


# Enable some PHP7 tweaks for Apache2 web server (/etc/php/7.0/apache2/php.ini).
#
#   * upload_max_filesize = 256M
#   * post_max_size, memory_limit = depends on system memory, we are using
#     phpmemlimit() function.
#   * error_reporting = E_ERROR
#
for SAPI in apache2 cli; do

    if [ ! -d "$PHP70DIR/$SAPI" ]; then
        continue
    fi

    ini_file="$PHP70DIR/$SAPI/php.ini"
    db_get php7.0-cn/${SAPI} || true
    if [ "$RET" = "true" ]; then

        cp_echo "CN: Checking and enabling some specific parameters in file $ini_file"

        phplimit="$(phpmemlimit)M"

        if [ -f "$ini_file" ]; then

            cp_check_and_sed "^[[:space:]]*upload_max_filesize[[:space:]]*=" \
                's/^[[:space:]]*upload_max_filesize[[:space:]]*=.*/upload_max_filesize = 256M/' \
                "$ini_file" && need_restart=1 || true

            cp_check_and_sed "^[[:space:]]*post_max_size[[:space:]]*=" \
                "s/^[[:space:]]*post_max_size[[:space:]]*=.*/post_max_size = ${phplimit}/" \
                "$ini_file" && need_restart=1 || true

            cp_check_and_sed "^[[:space:]]*memory_limit[[:space:]]*=" \
                "s/^[[:space:]]*memory_limit[[:space:]]*=.*/memory_limit = ${phplimit}/" \
                "$ini_file" && need_restart=1 || true

            cp_check_and_sed "^[[:space:]]*error_reporting[[:space:]]*=" \
                "s/^[[:space:]]*error_reporting[[:space:]]*=.*/error_reporting = E_ERROR/" \
                "$ini_file" && need_restart=1 || true
        fi

        ini_file_tmp=`mktemp $ini_file.tmp.XXXXXX`
        if [ -f "$ini_file" ]; then
            cat $ini_file > $ini_file_tmp
        fi

        if ! egrep -q "^[[:space:]]*upload_max_filesize[[:space:]]*=" $ini_file_tmp; then
            echo "upload_max_filesize = 256M" >> "$ini_file_tmp"
            need_restart=1
        fi
        if ! egrep -q "^[[:space:]]*post_max_size[[:space:]]*=" $ini_file_tmp; then
            echo "post_max_size = ${phplimit}" >> "$ini_file_tmp"
            need_restart=1
        fi
        if ! egrep -q "^[[:space:]]*memory_limit[[:space:]]*=" $ini_file_tmp; then
            echo "memory_limit = ${phplimit}" >> "$ini_file_tmp"
            need_restart=1
        fi
        if ! egrep -q "^[[:space:]]*error_reporting[[:space:]]*=" $ini_file_tmp; then
            echo "error_reporting = E_ERROR" >> "$ini_file_tmp"
            need_restart=1
        fi
        cp_mv "$ini_file_tmp" "$ini_file"
        chmod 644 "$ini_file"

        if [ -e "$ini_file_tmp" ]; then
            rm -f "$ini_file_tmp"
        fi
    fi

    # Validate php.ini values.
    if [ -f "$ini_file" ]; then
        php70_inivalues="$(phpinivalidate "$ini_file")"
        if [ -n "$php70_inivalues" ]; then
            db_fset php7.0-cn/inivalues seen false
            db_title php7.0-cn - konfiguracija za $(echo ${SAPI} | sed 's/a/A/;s/cli/CLI/')
            db_subst php7.0-cn/inivalues php70_sapi $(echo ${SAPI} | sed 's/a/A/;s/cli/CLI/')
            db_subst php7.0-cn/inivalues ini_file "$ini_file"
            db_capb escape
            db_subst php7.0-cn/inivalues php70_inivalues "$(echo -n "$php70_inivalues" | debconf-escape -e)"
            db_input critical php7.0-cn/inivalues || true
            db_go || true
        fi
    fi
done


# Compare active PHP7 extensions with PHP5 ones, if PHP5 configuration still exists.
#
if [ -d "${PHP5DIR}" ] && [ -f "${PHP5DIR}/apache2/php.ini" ]; then

    phpext_re='^[[:space:]]*extension[[:space:]]*=[[:space:]]*["]{0,1}(.*)\.so["]{0,1}'

    # Get all active PHP5 extensions.
    php5_ext="$(find ${PHP5DIR} -type f -name *.ini | 
         egrep "\/(conf\.d|apache2|cli)\/" | 
         xargs sed -rn 's/'$phpext_re'/\1/Ip')" || true

    # Get all active PHP7 extensions.
    php70_ext=""
    if [ -d "${PHP5DIR}" ]; then
        php70_ext="$(find ${PHP70DIR} -type f -name *.ini | 
             egrep "\/(conf\.d|apache2|cli)\/" | 
             xargs sed -rn 's/'$phpext_re'/\1/Ip')" || true
    fi

    # Compare PHP7 <-> PHP5 extensions.
    php70_ext_mis=""
    for ext in $php5_ext; do
        if [ "$(echo $php70_ext | egrep $ext)" = "" ]; then
            php70_ext_mis="\n${ext}${php70_ext_mis}"
        fi
    done

    # Some PHP7 extensions are not active.
    if [ -n "$php70_ext_mis" ]; then
        db_fset php7.0-cn/extensions seen false
        db_title php7.0-cn - konfiguracija
        db_capb escape
        db_subst php7.0-cn/extensions php70_extensions "${php70_ext_mis#*\n}"
        db_input critical php7.0-cn/extensions || true
        db_go || true
    fi
fi


db_stop || true


# Restart Apache2 web server if needed.
#
if [ $need_restart -eq 1 ]; then

    # Check Apache2 web server configuration.
    if apache2ctl configtest 2>/dev/null; then
        invoke-rc.d apache2 force-reload || true
    else
        # Something is broken.
        cp_echo "CN: Your Apache2 configuration is broken."
        cp_echo "CN: Please, check the service after the installation finishes!"
    fi
fi


# Mail root
#
cp_mail "$PKG"

#DEBHELPER#

exit 0