#! /bin/bash

# function library for versions retrieval

# v. 1.0.2

# Function list:

# k_centos_version()          - function returns CentOS version in variable 'centos_version'
# k_script_version()          - function returns C script version
# k_mysql_version()           - function returns mysql version, MYSQL_VERSION - full x.y.z, MYSQL_VERSION1 - x, MYSQL_VERSION2 - y, MYSQL_VERSION3 - z
# k_ruby_version()            - function returns RUBY_VERSION, 0 - not installed
# k_gem_version()             - function returns GEM_VERSION, 0 - not installed
# k_passenger_version()       - function returns PASSENGER_VERSION, 0 - not installed


# Function naming rules
# k_<object>_<action> where either object or action are not mandatory (only object or only action is necessary, could be both also)



# function returns CentOS version
k_centos_version() {
    k_detect_os

    if [[ "$OS" == "centos" ]]; then
        centos_version=$DIST
    else
        report "OS $OS $DIST, not Centos!" 1
        EXIT_CODE=1
    fi
}


# function returns mysql version
#    MYSQL_VERSION - full x.y.z    MYSQL_VERSION1 - x    MYSQL_VERSION2 - y    MYSQL_VERSION3 - z
k_mysql_version() {

    if [ ! -f /usr/bin/mysql ]; then
        report "MySQL not installed" 2
        return
    fi

    local mv=$(mysql -V)

    if echo $mv | grep -q "Ver 14.14"; then
        MYSQL_VERSION=`echo $mv | awk '{print $5}' | sed 's/,$//' | xargs`
    elif  echo $mv | grep -q "Ver 8."; then
        MYSQL_VERSION=`echo $mv | awk '{print $3}' | xargs`
    else
        MYSQL_VERSION="unknown"
        report "MYSQL_VERSION unknown: $mv" 1
        report "  fix the script /kf/date_get.sh k_mysql_version()" fix
        EXIT_CODE=1
        return
    fi

    MYSQL_VERSION1=`echo $MYSQL_VERSION | awk -F "." '{print $1}'`
    MYSQL_VERSION2=`echo $MYSQL_VERSION | awk -F "." '{print $2}'`
    MYSQL_VERSION3=`echo $MYSQL_VERSION | awk -F "." '{print $3}'`

}


# function returns C script version
k_script_version() {
    script=$1
    date_check="2021-11-22 00:00:00" # (constant) date when all C scripts started to produce version output (until this date, all scripts are considered as outdated)

    if [ ! -e $script ]; then
        echo ""
        return
    fi

    # get script modify date (time when it was installed)
    script_installed_at=$(stat $script | grep Modify | cut -c9-27)

    # convert dates to seconds (for easy comparison)
    date_check_seconds=$(date -d "$date_check" +%s)
    script_installed_at_seconds=$(date -d "$script_installed_at" +%s)

    if [ $date_check_seconds -ge $script_installed_at_seconds ]; then
        echo ""
        return
    fi

    $script -v
}


# function returns RUBY_VERSION, 0 - not installed
k_ruby_version()
{
    RUBY_VERSION="0"
    if `gem --version | grep -q -v 'command not found'`; then
        RUBY_VERSION=`ruby --version | awk '{print $2}' | awk -F "p" '{print $1}' | xargs`
    fi
}


# function returns GEM_VERSION, 0 - not installed
k_gem_version()
{
    GEM_VERSION="0"
    if `gem --version | grep -q -v 'command not found'`; then
        GEM_VERSION=`gem --version | xargs`
    fi
}


# function returns PASSENGER_VERSION, 0 - not installed
k_passenger_version()
{
    # local pv=`passenger --version`

    # # v6+
    # PASSENGER_VERSION=`echo $pv | awk '{print $3}' | xargs`

    # # v4+
    # if [[ $PASSENGER_VERSION == "" ]]; then
    #     if echo $pv | grep -q Hongli; then
    #         PASSENGER_VERSION=`echo $pv | grep 'Phusion Passenger version' | awk '{print $4}' | xargs`
    #     fi
    # fi

    # if [[ $PASSENGER_VERSION == "" ]]; then
    #     PASSENGER_VERSION="0"
    # fi

    local pv=`passenger-config --version`
    PASSENGER_VERSION=`echo $pv | xargs`


    if echo $PASSENGER_VERSION | grep -q 'Phusion Passenger(R)'; then
        PASSENGER_VERSION=`echo $PASSENGER_VERSION | awk '{print $3}' |  xargs`
    fi

    if [[ $PASSENGER_VERSION == "" ]]; then
        PASSENGER_VERSION="0"
    fi
}