#----------------------------------------------------------------------------
# /var/install/include/rsyslogdlib - library for eisfair scripts
#
# Copyright (c) 2001-2022 Ansgar Puester <ansgar.puester@freenet.de
#
# Creation:     2017-06-21  ap
# Last Update:  $Id$
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------


#----------------------------------------------------------------------------
# interface description
#----------------------------------------------------------------------------
#
# Routines:
#   check_required_package()   Check if required package is available
#   get_defaults()             Get the defaults of the database server
#
#----------------------------------------------------------------------------

#============================================================================
# only include this file once
#============================================================================

if [ "$_RSYSLOGDLIB" != "true" ]
then
    _RSYSLOGDLIB='true'

    if [ "$1" = "version" ]
    then
        _rsyslogdlib_version=`grep -E "Last Update *:" $0 | sed "s/.*rsyslogdlib[-_.a-z]* //g" | cut -d' ' -f1`
        echo ${_rsyslogdlib_version}
    fi

    #
    # xxxxxxxxxxxxx
    # -------------
    #
    # yyyyyyyyyyyyyyyyyyyyyyyy
    #
    # Parameters:      $1    para 1
    # 
    #template ()
    #{
    #   true
    #}

    #
    # check_required_package
    # ----------------------
    #
    # Check if required package is available
    #
    # Parameters:      $1    required package
    #
    #     Return:      0     required package installed
    #                        and has a valid version
    #                  1     required package is not installed
    #                        or has not a valid version
    #
    check_required_package()
    {
       local act_package
       local version_mysql
       local version_mariadb
       local version_libmysql
       local version_check
       local check
       local act_version

       act_package="$1"
       if [ "$act_package" = '' ]; then
          mecho --error "No database server package specified"
          return 1
       fi

       # check for actual and older mysql database installations

       # mysql 2.6.1 or higher is required
       version_mysql='2.6.1'
       # mariadb 2.8.1 or higher is required
       version_mariadb='2.8.1'
       # libmysql ?.?.? or higher is required
       version_libmysql='1.0.0'

       case $act_package in
         mysql*)   version_check=${version_mysql}
                   ;;
         mariadb*) version_check=${version_mariadb}
                   ;;
         Remote)   version_check=${version_libmysql}
                   act_package='libmariadb3'
                   ;;
       esac

       check=$(/var/install/bin/check-version ${act_package} ${version_check})
       if [ "${check}" = 'not-installed' ]; then
          mecho --error "Package ${act_package} is not installed"
          return 1
       else
          # check version only if version_check is set
          if [ -n "${version_check}" ]; then
             act_version=`/usr/bin/eisman query --installed --fields="version" $act_package | grep -v "^\-----" | sed 's/^version *//'`
             check=$(/var/install/bin/check-version -diff "${act_version}" "${version_check}")
             if [ "${check}" = 'old' ]; then
                mecho --error "Package ${act_package} ${version_check} or higher is required"
                return 1
             fi
          fi
       fi
       return 0
    }

    #
    # get_defaults
    # ------------
    #
    # Get the defaults of the database server
    #
    # Parameters:      $1    database package
    #
    #     Return:      0     defaults available
    #                        additional variable: mysql_config_file
    #                                             name of config file
    #                  1     defaults not available


    # ---------------------------------------------------------------------------
    # defaults
    # ---------------------------------------------------------------------------
    get_defaults()
    {
        local act_package
        local version_multi
        local act_version
        local check
        local my_path
        local info_file
        # not local mysql_config_file

        act_package=$1
        if [ "$act_package" = '' ]; then
           mecho --error "No database package package specified"
           return 1
        fi

        # Remote has no defaults
        [ "$act_package" = 'Remote' ] && return 0

        # starting with version 2.11.0 multiple database servers are supported
        # check if a version before 2.11.0 is installed
        version_multi='2.11.0svn2017-06-17'

        act_version=`/usr/bin/eisman query --installed --fields="version" $act_package | grep -v "^\-----" | sed 's/^version *//'`
        check=$(/var/install/bin/check-version -diff ${act_version} ${version_multi})

        if [ "$check" = 'installed' -o "$check" = 'new' ]; then
           # keep only the trailing numbers
           my_path=$(echo ${act_package} | sed 's|[^[:digit:]]||g')
           # file /srv/mysql/defaults.info expects variable my_path !!
           info_file=/srv/mysql/defaults.info
           mysql_config_file="/etc/mysql/my${my_path}.cnf"
        else
           info_file=/var/lib/mysql/defaults.info
           mysql_config_file="/etc/my.cnf"
        fi

        if [ ! -r ${info_file} ]; then
           mecho --error "File ${info_file} does not exists or is not readable"
           return 1
        fi

        # read default values
        . ${info_file}

        # check mysql_socket
        if [ "$mysql_socket" = '' ]; then
           mecho --error "Package ${act_package} has no valid configuration"
           return 1
        fi

        return 0
    }

fi