#!/bin/bash

####################################################################################################
#### author: SlickStack ############################################################################
#### link: https://slickstack.io ###################################################################
#### mirror: http://mirrors.slickstack.io/bash/ss-functions.txt ####################################
#### path: /var/www/ss-functions ###################################################################
#### destination: n/a (not a boilerplate) ##########################################################
#### purpose: Required functions and variables used by ss core cron jobs and bash scripts ##########
#### module version: Ubuntu 20.04 LTS ##############################################################
#### sourced by: ss core cron jobs, ss core bash scripts ###########################################
#### bash aliases: n/a #############################################################################
####################################################################################################

## SS-FUNCTIONS MUST BE INCLUDED IN ALL SS SCRIPTS IN ORDER FOR THEM TO WORK PROPERLY ##
## IT NOT ONLY SPECIFIES COMMAND FLAGS (OPTIONS) BUT ALSO PRETTIFIES THE SHELL ##

####################################################################################################
#### SS-Functions: Critical Bash Variables #########################################################
####################################################################################################

## SNIPPET: ss-functions, ss-install

## these are kind of like enviroment variables that are used within various ss scripts ##
## we keep these variables together for easy reference and better organization ##

## ss variables ##
SS_CPU_CORES=`grep -c ^processor /proc/cpuinfo 2>/dev/null || sysctl -n hw.ncpu || echo "$NUMBER_OF_PROCESSORS"`
SS_DISK_FREE=`df -kh --output=avail "$PWD" | tail -n1`
SS_DISK_TOTAL=`df | grep '^/dev/' | awk '{s+=$2} END {print s/1048576}'`
SS_EOF="SS_EOF"
SS_IPV4_ADDRESS=`ip addr show $SS_NETWORK_INTERFACE | grep "inet " | awk '{ print $2;exit }' | cut -d/ -f1`
SS_IPV6_ADDRESS=`ip addr show $SS_NETWORK_INTERFACE | grep "inet6 " | awk '{ print $2;exit }' | cut -d/ -f1`
SS_LINUX_KERNEL=`uname -a`
SS_NETWORK_INTERFACE=`ip route get 1.1.1.1 | head -n1 | awk '{print $5}'`
SS_OS_VERSION=`lsb_release -ds`

SLEEP_MESSAGE_BEGIN="1s"

## ss file mirror links ##
MIRROR_SS_CHECK="http://mirrors.slickstack.io/bash/ss-check.txt"
MIRROR_SS_CONFIG_SAMPLE="http://mirrors.slickstack.io/bash/ss-config-sample.txt"
MIRROR_SS_WORKER="http://mirrors.slickstack.io/bash/ss-worker.txt"

## ss file paths (temp) ##
TMP_SS_CONFIG="/tmp/ss-config"
TMP_WORDPRESS_CONFIG_DEV="/tmp/wp-config-dev.php"
TMP_WORDPRESS_CONFIG_PRODUCTION="/tmp/wp-config-production.php"
TMP_WORDPRESS_CONFIG_STAGING="/tmp/wp-config-staging.php"

## ss file paths (final) ##
PATH_SS_CHECK="/var/www/ss-check"
PATH_SS_WORKER="/var/www/ss-worker"

## old stuff ##
UBUNTU_VERSION=`lsb_release -rs`
NETWORK_INTERFACE=`ip route get 1.1.1.1 | head -n1 | awk '{print $5}'`
IPV4_ADDRESS=`ip addr show $NETWORK_INTERFACE | grep "inet " | awk '{ print $2;exit }' | cut -d/ -f1`
IPV6_ADDRESS=`ip addr show $NETWORK_INTERFACE | grep "inet6 " | awk '{ print $2;exit }' | cut -d/ -f1`
SS_HOSTNAME=`/bin/hostname -f` ## remove -f in future
SS_HOSTNAME_ALL=`/bin/hostname -A`
SS_HOSTNAME_FQDN=`/bin/hostname -f`
SS_TLD=`hostname -d`
# SS_MYSQL_VERSION=`mysqld --version`
# SS_MYSQL_SIZE=`mysql --execute="SELECT table_schema AS "wordpress", SUM(data_length + index_length) / 1024 / 1024 / 1024 AS "Size (GB)" FROM information_schema.TABLES GROUP BY table_schema";`
# SS_PHP_VERSION=`php -v | grep ^PHP | cut -d' ' -f2`
# SS_PHP_EXTENSIONS=`php -r "print_r(implode(', ', get_loaded_extensions()));"`

####################################################################################################
#### SS-Functions: Critical Bash Functions #########################################################
####################################################################################################

## SNIPPET: ss-functions, ss-install

## these functions are sourced into ss core cron jobs and bash scripts for consistency ##
## this also speeds up processing time by avoiding repeat inline bash commands ##

## add-apt-repository alias flags ##
function add-apt-repository {
    export DEBIAN_FRONTEND=noninteractive
    export DEBIAN_PRIORITY=critical
    export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
    command /usr/bin/add-apt-repository --yes "$@"
}

## apt alias flags ##
function apt {
    export DEBIAN_FRONTEND=noninteractive
    export DEBIAN_PRIORITY=critical
    export PATH='/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
    command /usr/bin/apt --yes --quiet --option Dpkg::Options::=--force-confold --option Dpkg::Options::=--force-confdef "$@"
}

## cp alias flags ##
function cp {
    command cp -R -f -d --no-preserve=mode,ownership "$@"
}

## ln alias flags ##
function ln {
    command ln -s -f "$@"
}

## mkdir alias flags ##
function mkdir {
    command mkdir -p "$@"
}

## mysql alias flags (8.0) ##
function mysql {
    command mysql --user=root --host=localhost --protocol=socket --port=3306 --force "$@"
    # mysql --user=root --host="$DB_HOST" --protocol=tcp --port=3306 --flush-privileges --force "$DB_NAME" 
    # --max_allowed_packet=1GB ... add this after test
}

## mysql_5.7 alias flags ##
function mysql_5.7 {
    command mysql --user=root --password=$DB_PASSWORD_ROOT --host=127.0.0.1 --protocol=tcp --port=3306 --force "$@"
}

## mysqldump alias flags ##
# function mysqldump {
    # /usr/bin/mysqldump
#     command mysqldump --user=$DB_USER --password=$DB_PASSWORD --host=$DB_HOST --protocol=tcp --port=3306 --no-tablespaces --single-transaction --skip-lock-tables --dump-date --force "$@"
# }

## mysqldump alias flags ##
function mysqldump {
    # /usr/bin/mysqldump
    command mysqldump --user=$DB_USER --password=$DB_PASSWORD --host=$DB_HOST --protocol=tcp --port=3306 --no-tablespaces --single-transaction --skip-lock-tables --dump-date --force "$@"
}

## rm alias flags ##
function rm {
    command rm -R -f "$@"
}

## rsync alias flags ##
function rsync {
    command rsync -aI --ignore-errors "$@"
}

## touch alias flags ##
function touch {
    command touch -am "$@"
}

## unzip alias flags ##
function unzip {
    command unzip -o "$@"
}

## wget alias flags ##
function wget {
    command wget --quiet --no-check-certificate --inet4-only --no-cache --no-cookies --tries=3 --timeout=15 "$@"
}

####################################################################################################
#### SS-Functions: Pretty Colors + Styles For The Shell ############################################
####################################################################################################

## SNIPPET: ss-functions, ss-install

## these color variables help maintain cleaner and prettier Bash scripts in SlickStack ##
## we substitute e.g. ${PINK} within any echo line then use ${RESET} to revert ##

## pretty colors old ##
DARKRED='\033[0;31m'
LIGHTRED='\033[1;31m'
DARKGREEN='\033[0;32m'
LIGHTGREEN='\033[1;32m'
DARKCYAN='\033[0;36m'
LIGHTCYAN='\033[1;36m'
DARKBLUE='\033[0;34m'
LIGHTBLUE='\033[1;34m'
DARKPURPLE='\033[0;35m'
LIGHTPURPLE='\033[1;35m'

## new ##
GREEN='\033[1;32m'
NOCOLOR='\033[0m'
ORANGE='\033[0;33m'
PINK='\033[1;35m'
PURPLE='\033[0;35m'
YELLOW='\033[1;33m'
WHITE='\033[1;37m'

DARKGRAY='\033[1;30m'
LIGHTGRAY='\033[0;37m'


BGBLACK=$(tput setab 0) # black
BGRED=$(tput setab 1) # red
BGGREEN=$(tput setab 2) # green
BGYELLOW=$(tput setab 3) # yellow
BGBLUE=$(tput setab 4) # blue
BGPINK=$(tput setab 5) # magenta (pink)
BGCYAN=$(tput setab 6) # cyan
BGWHITE=$(tput setab 7) # white

## pretty styles ##
BOLD=$(tput bold) # bold (strong)
DIM=$(tput dim) # dim (half-bright)
NORMAL=$(tput sgr0) # reset all styles (normal)
RESET=$(tput sgr0) # reset all styles (normal)
BLINK=$(tput blink) # blink
UNDERLINE=$(tput smul) # underline
ENDUNDER=$(tput rmul) # end underline
REVERSE=$(tput rev) # reverse
STANDOUT=$(tput smso) # standout (highlight)
ENDSTAND=$(tput rmso) # end standout

####################################################################################################
#### SlickStack: External References Used To Improve This Script (Thanks, Interwebz) ###############
####################################################################################################

## Ref: https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-PDA/LSB-PDA/lsbrelease.html
## Ref: https://www.tecmint.com/8-pratical-examples-of-linux-touch-command/
## Ref: https://stackoverflow.com/questions/6481005/how-to-obtain-the-number-of-cpus-cores-in-linux-from-the-command-line
## Ref: https://ostechnix.com/find-out-the-linux-distribution-name-version-and-kernel-details/
## Ref: https://linuxize.com/post/how-to-check-mysql-version/
## Ref: https://www.cyberciti.biz/faq/find-my-linux-machine-name/
## Ref: https://unix.stackexchange.com/questions/471521/how-to-get-only-the-version-number-of-php
## Ref: https://www.geeksforgeeks.org/how-to-create-comma-separated-list-from-array-in-php/
## Ref: https://stackoverflow.com/questions/478844/how-do-i-see-the-extensions-loaded-by-php
## Ref: https://linux.die.net/man/1/dnsdomainname
## Ref: https://serverfault.com/questions/739684/why-hostname-f-gives-me-subdomain-back-when-only-domain-is-in-etc-hostname
## Ref: https://serverfault.com/questions/545215/change-ps1-value-for-all-bash-users
## Ref: https://serverfault.com/questions/218629/most-effective-way-to-change-linux-command-prompt-for-all-users
## Ref: https://askubuntu.com/questions/984060/export-ps1-for-customizing-shell-prompt
## Ref: https://serverfault.com/questions/296970/bash-prompt-on-ubuntu-fqdn-h-same-as-hostname-h
## Ref: https://www.howtoforge.com/tutorial/linux-touch-command/
## Ref: https://www.binarytides.com/linux-touch-command/
## Ref: http://www.linfo.org/touch.html
## Ref: https://superuser.com/questions/351251/get-total-size-of-my-hard-drive-in-linux-using-the-command-line-without-root-p
## Ref: https://www.shellhacks.com/bash-colors/
## Ref: https://misc.flogisoft.com/bash/tip_colors_and_formatting
## Ref: https://www.geeksforgeeks.org/hostname-command-in-linux-with-examples/
## Ref: https://dev.mysql.com/doc/refman/8.0/en/packet-too-large.html
## Ref: https://superuser.com/questions/161110/why-doesnt-hostname-fqdn-work-on-my-ubuntu-computer
## Ref: https://techpiezo.com/linux/wget-force-ipv4-ipv6-connection/
## Ref: https://unix.stackexchange.com/questions/168584/wget-is-unable-to-resolve-host-address-80-of-the-time
## Ref: https://github.community/t/cannot-reach-any-github-io-page-via-ipv6/10310
## Ref: https://github.com/isaacs/github/issues/354

## SS_EOF