#!/bin/bash

# Description: call this function whenever you need to log output (preferred to calling echo)

# Arguments: log string to display

function t_Log

{

	printf "[+] `date` -> $*\n"

}

# Description: call this at the end of your script to assess the exit status

# Arguments: the exit status from whatever you want checked (ie, '$?')

function t_CheckExitStatus

{

	[ $1 -eq 0 ] && { t_Log "PASS"; return $PASS; }

	t_Log "FAIL"

	exit $FAIL

}

# Description: call this to perform yum-based installs of packages

# Arguments: a space separated list of package names to install.

function t_InstallPackage

{

    if [ "$centos_ver" -ge "8" ]; then

        mkdir /var/cache/{dnf,yum,system-upgrade}

        dnf makecache

    fi

	t_Log "Attempting yum install: $*"

	/usr/bin/yum -y -d${YUMDEBUG} install "$@"

  # TODO: add a hook here, to make sure all binary files have ldd run

  # against them, and that there are no missing linker targets

	t_CheckExitStatus $?

}

# Description: call this to install packages without weak dependencies

# Arguments: a space separated list of package names to install

function t_InstallPackageMinimal

{

    t_Log "Installing packages: $@"

    dnf --assumeyes --debuglevel ${YUMDEBUG} --setopt install_weak_deps=0 install $@

    t_CheckExitStatus $?

}

# Description: call this to perform a yum-based removal of packages

# Arguments: a space separated list of package names to remove.

function t_RemovePackage

{

	t_Log "Attempting yum remove: $*"

	/usr/bin/yum -y -d0 remove "$@"

	t_CheckExitStatus $?

}

# Description: call this to enable a module stream

# Arguments: the module:stream(s) to enable

function t_EnableModuleStream

{

    t_Log "Enabling module stream $@"

    dnf --assumeyes --debuglevel ${YUMDEBUG} module enable $@

    t_CheckExitStatus $?

}

# Description: call this to reset a module

# Arguments: the module(s) to reset

function t_ResetModule

{

    t_Log "Resetting module $@"

    dnf --assumeyes --debuglevel ${YUMDEBUG} module reset $@

    t_CheckExitStatus $?

}

# Description: call this to process a list of folders containing test scripts

# Arguments: a file handle from which to read the names of paths to process.

function t_Process

{

	exec 7< $@

	while read -u 7 f

	do

		# skip files named readme or those that start with an _

		[[ "$(basename ${f})" =~ readme|^_ ]] &&  continue;

		# handy tip: chmod -x to disable individual test scripts.

		[ -x ${f} ] && ${f}

	done

	return 0

}

# Description: check to see if one or more packages are installed

# return true if they're all installed, false if not.

# Arguments: one or more package names to check for.

function t_CheckDeps

{

	# TODO

	# success, all packages are installed

	return 0

}

# Description: perform a service control and sleep for a few seconds to let

#   the dust settle. Using this function avoids a race condition wherein

#   subsequent tests execute (and typically fail) before a service has had a

#   chance to fully start/open a network port etc.

# Call it with cycle instead of start, and it will stop+start

#   handy, if you dont know the service might already be running

function t_ServiceControl

{

  if [ $2 = "cycle" ]; then

    /sbin/service $1 stop > /dev/null 2>&1

    sleep 3

    /sbin/service $1 start

  else

  	/sbin/service $1 $2

  fi

	# aaaand relax...

	sleep 3

}

# Description: Get a package (rpm) release number

function t_GetPkgRel

{

       rpm -q --queryformat '%{RELEASE}' $1

}

# Description: return the distro release (returns 5 or 6 now)

function t_DistCheck

{

	rpm -q $(rpm -qf /etc/redhat-release) --queryformat '%{version}\n'|cut -f 1 -d '.'

}

# Additionally set distro release to $centos_ver

centos_ver=$(t_DistCheck)

# Description: test if we are using CentOS Stream

function t_StreamCheck

{

    rpm -q centos-stream-release &> /dev/null && echo "yes" || echo "no"

}

# set stream variable

centos_stream=$(t_StreamCheck)

# Description: skip test on a particular release

# Arguments: release, reason

function t_SkipRelease {

    if [ $(rpm --eval %rhel) -eq $1 ]; then

        t_Log "$2"

        t_Log "SKIP"

        exit 0

    fi

}

# Description: skip test on everything except a particular release

# Arguments: release, reason

function t_SkipNotRelease {

    if [ $(rpm --eval %rhel) -ne $1 ]; then

        t_Log "$2"

        t_Log "SKIP"

        exit 0

    fi

}

# Description: skip test on releases less than a particular release

# Arguments: release, reason

function t_SkipReleaseLessThan {

    if [ $(rpm --eval %rhel) -lt $1 ]; then

        t_Log "$2"

        t_Log "SKIP"

	exit 0

    fi

}

# Description: skip test on releases greater than a particular release

# Arguments: release, reason

function t_SkipReleaseGreaterThan {

    if [ $(rpm --eval %rhel) -gt $1 ]; then

        t_Log "$2"

        t_Log "SKIP"

        exit 0

    fi

}

# Description: Get a package (rpm) version number

function t_GetPkgVer

{

       rpm -q --queryformat '%{version}' $1

}

# Description: get the arch

function t_GetArch

{

	rpm -q $(rpm -qf /etc/redhat-release) --queryformat '%{arch}\n'

}

# Set the arch

arch=$(t_GetArch)

function t_CheckForPort

{

        while true

        do

        sleep 1

          >/dev/null 2>&1 >/dev/tcp/localhost/$1

        if [ "$?" = "0" ] ; then

          t_Log "Waiting for tcp port $1 to be listening ..."

          break

        fi

        done

}

function t_Assert

{

 $@ >/dev/null 2>&1

 t_CheckExitStatus $?

}

function t_Assert_Equals

{

 [ $1 -eq $2 ]

 t_CheckExitStatus $?

}

function t_Select_Alternative

{

	name=$1

	search=$2

	option=$(/bin/echo|/usr/sbin/alternatives --config "$name"|/bin/grep -E "$search"|/usr/bin/head -n1|sed 's/    .*//g;s/[^0-9]//g')

	if [ -z "$option" ];then

		t_Log "Option not found for altenative $search of $name"

		t_CheckExitStatus 1

	fi

	t_Log "Selecing alternative $option for $name--$search"

	/bin/echo "$option"|/usr/sbin/alternatives --config "$name" >/dev/null 2>&1

}

export -f t_Log

export -f t_CheckExitStatus

export -f t_InstallPackage

export -f t_InstallPackageMinimal

export -f t_RemovePackage

export -f t_EnableModuleStream

export -f t_ResetModule

export -f t_Process

export -f t_CheckDeps

export -f t_ServiceControl

export -f t_SkipRelease

export -f t_SkipNotRelease

export -f t_SkipReleaseLessThan

export -f t_SkipReleaseGreaterThan

export -f t_GetPkgRel

export -f t_DistCheck

export -f t_GetPkgVer

export -f t_GetArch

export -f t_CheckForPort

export -f t_Assert

export -f t_Assert_Equals

export -f t_Select_Alternative

export centos_ver

export centos_stream

export arch