#!/bin/bash

####################################################################################################
#### author: SlickStack ############################################################################
#### link: https://slickstack.io ###################################################################
#### mirror: https://mirrors.slickstack.io/bash/ss-install-wordpress-core.txt ######################
#### path: /var/www/ss-install-wordpress-core ######################################################
#### destination: n/a (not a boilerplate) ##########################################################
#### purpose: Reinstalls the WordPress module (CMS) package and non-config files (idempotent) ######
#### module version: WordPress 6.0.x ###############################################################
#### sourced by: ss-install ########################################################################
#### bash aliases: ss install [wordpress|wp] core ##################################################
####################################################################################################

## SS-CONFIG MUST BE PROPERLY CONFIGURED AND ON CURRENT BUILD BEFORE RUNNING SS-INSTALL ##
## ENSURE YOUR SS-CONFIG BUILD REMAINS CURRENT BY RUNNING SS-UPDATE OCCASIONALLY ##

## source ss-config ##
source /var/www/ss-config

## source ss-functions ##
source /var/www/ss-functions

## BELOW THIS RELIES ON SS-CONFIG AND SS-FUNCTIONS

####################################################################################################
#### TABLE OF CONTENTS (SS-Install-WordPress-Core) #################################################
####################################################################################################

## this is a brief summary of the different code snippets you will find in this script ##
## each section should be commented so you understand what is being accomplished ##

## A. Touch Timestamp File
## B. Message (Begin Script)
## C. Install Ubuntu Utils
## D. Retrieve WordPress Core ZIP 
## E. Install WordPress Core (Production)
## F. Install WordPress Core (Staging)
## G. Install WordPress Core (Development)
## H. Populate Production Database Options (Conditional)
## I. Populate Development Database Options (Conditional)
## J. Modify Site Domains In Database
## K. Sync Production Database To Staging
## L. Purge Cache (PHP OPcache)
## M. Reset Permissions (WordPress Core)
## N. Cleanup Temporary Files

####################################################################################################
#### A. SS-Install-WordPress-Core: Touch Timestamp File ############################################
####################################################################################################

## this is a dummy timestamp file that will remember the last time this script was run ##
## it can be useful for developer reference and is sometimes used by SlickStack ##

## script timestamp ##
ss_touch "${TIMESTAMP_SS_INSTALL_WORDPRESS_CORE}"

####################################################################################################
#### B. SS-Install-WordPress-Core: Message (Begin Script) ##########################################
####################################################################################################

## this is a simple message that announces to the shell the purpose of this bash script ##
## it will only be noticed by sudo users who manually call ss core bash scripts ##

## echo message ##
ss_echo "${COLOR_INFO}Running ss-install-wordpress-core... ${COLOR_RESET}"

####################################################################################################
#### C. SS-Install-WordPress-Core: Install Ubuntu Utils ############################################
####################################################################################################

## run ss-install-ubuntu-utils ##
source "${PATH_SS_INSTALL_UBUNTU_UTILS}"

####################################################################################################
#### D. SS-Install-WordPress-Core: Retrieve WordPress Core ZIP #####################################
####################################################################################################

## CMS modules are installed by SlickStack via files from our public mirror servers ##
## we always install the latest stable minor version (never major versions) ##

## retrieve latest version ##
ss_wget "${TMP_WORDPRESS_ZIP}" "${MIRROR_WORDPRESS_ZIP}"

####################################################################################################
#### E. SS-Install-WordPress-Core: Install WordPress Core (Production) #############################
####################################################################################################

## this installation process removes outdated WordPress Core files or potential malware ##
## it is not foolproof but it should address several common infection targets ##

## cleanup old files ##
if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_ADMIN}" != "false" ]]; then
    ss_rm /var/www/html/wp-admin
fi

if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_INCLUDES}" != "false" ]]; then
    ss_rm /var/www/html/wp-includes
fi

if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_PHP_FILES_ROOT}" != "false" ]]; then
    find /var/www/html/ -maxdepth 1 -type f ! -name "wp-config.php" -name "*.php" -delete 
fi

## prepare new files ##
ss_cp "${TMP_WORDPRESS_ZIP}" /var/www/html
unzip /var/www/html/wordpress.zip -d /var/www/html
chown -R www-data:slickstack /var/www/html/wordpress
chmod 775 /var/www/html/wordpress

## install new files ##
ss_rsync /var/www/html/wordpress/* /var/www/html

## delete tmp files ##
ss_rm /var/www/html/wordpress
ss_rm /var/www/html/wordpress.zip*

####################################################################################################
#### F. SS-Install-WordPress-Core: Install WordPress Core (Staging) ################################
####################################################################################################

## this installation process removes outdated WordPress Core files or potential malware ##
## it is not foolproof but it should address several common infection targets ##

if [[ "${STAGING_SITE}" == "true" ]]; then 

    ## cleanup old files ##
    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_ADMIN}" != "false" ]]; then
        ss_rm /var/www/html/staging/wp-admin
    fi

    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_INCLUDES}" != "false" ]]; then
        ss_rm /var/www/html/staging/wp-includes
    fi

    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_PHP_FILES_ROOT}" != "false" ]]; then
        find /var/www/html/staging/ -maxdepth 1 -type f ! -name "wp-config.php" -name "*.php" -delete 
    fi

    ## prepare new files ##
    ss_cp "${TMP_WORDPRESS_ZIP}" /var/www/html/staging
    unzip /var/www/html/staging/wordpress.zip -d /var/www/html/staging
    chown -R www-data:slickstack /var/www/html/staging/wordpress
    chmod 775 /var/www/html/staging/wordpress
    
    ## install new files files ##
    ss_rsync /var/www/html/staging/wordpress/* /var/www/html/staging
    
    ## delete tmp files ##
    ss_rm /var/www/html/staging/wordpress
    ss_rm /var/www/html/staging/wordpress.zip*
    
fi

####################################################################################################
#### G. SS-Install-WordPress-Core: Install WordPress Core (Development) ############################
####################################################################################################

## this installation process removes outdated WordPress Core files or potential malware ##
## it is not foolproof but it should address several common infection targets ##

if [[ "${DEV_SITE}" == "true" ]]; then 

    ## cleanup old files ##
    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_ADMIN}" != "false" ]]; then
        ss_rm /var/www/html/dev/wp-admin
    fi

    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_WP_INCLUDES}" != "false" ]]; then
        ss_rm /var/www/html/dev/wp-includes
    fi

    if [[ -f "${TMP_WORDPRESS_ZIP}" ]] && [[ "${SS_INSTALL_WORDPRESS_CORE_DELETE_PHP_FILES_ROOT}" != "false" ]]; then
        find /var/www/html/dev/ -maxdepth 1 -type f ! -name "wp-config.php" -name "*.php" -delete 
    fi

    ## prepare new files ##
    ss_cp "${TMP_WORDPRESS_ZIP}" /var/www/html/dev
    unzip /var/www/html/dev/wordpress.zip -d /var/www/html/dev
    chown -R www-data:slickstack /var/www/html/dev/wordpress
    chmod 775 /var/www/html/dev/wordpress
    
    ## install new files ##
    ss_rsync /var/www/html/dev/wordpress/* /var/www/html/dev
    
    ## delete tmp files ##
    ss_rm /var/www/html/dev/wordpress
    ss_rm /var/www/html/dev/wordpress.zip*
    
fi

####################################################################################################
#### H. SS-Install-WordPress-Core: Populate Production Database Options (Conditional) ##############
####################################################################################################

## minimum wp_options required to avoid /wp-admin/install.php redirect are below: ##
## home/siteurl, blogname, admin_user, admin_email, admin_password ##

QUERY_PRODUCTION_WP_OPTIONS_EXIST=$(mysql --execute "SHOW TABLES FROM ${DB_NAME} WHERE Tables_in_${DB_NAME} LIKE '${DB_PREFIX}options';")
GREP_WP_OPTIONS_STRING_PRODUCTION=$(echo "${QUERY_PRODUCTION_WP_OPTIONS_EXIST}" | ss_grep_boolean "${DB_PREFIX}"options)

## populate wp_options if not exists ##
if [[ -z "${GREP_WP_OPTIONS_STRING_PRODUCTION}" ]]; then
    /usr/bin/php -qCr "include '/var/www/html/wp-admin/install.php'; wp_install('SlickStack', '\"${SFTP_USER}\"', '\"${SFTP_USER}\"@\"${SITE_DOMAIN_EXCLUDING_WWW}\"', 1, '', \"${SFTP_PASSWORD}\", 'en_US');"
    mysql --execute="UPDATE ${DB_PREFIX}options SET option_value='Lightning-fast WordPress on Nginx' WHERE option_name='blogdescription';"
fi

####################################################################################################
#### I. SS-Install-WordPress-Core: Populate Development Database Options (Conditional) #############
####################################################################################################

## minimum wp_options required to avoid /wp-admin/install.php redirect are below: ##
## home/siteurl, blogname, admin_user, admin_email, admin_password ##

## populate wp_options if not exists ##
if [[ "${DEV_SITE}" == "true" ]]; then
    QUERY_DEVELOPMENT_WP_OPTIONS_EXIST=$(mysql --execute "SHOW TABLES FROM development WHERE Tables_in_development LIKE '${DB_PREFIX}options';" 2> /dev/null)
    GREP_WP_OPTIONS_STRING_DEVELOPMENT=$(echo "${QUERY_DEVELOPMENT_WP_OPTIONS_EXIST}" | ss_grep_boolean "${DB_PREFIX}"options)
    ## populate wp_options if not exists ##
    if [[ -z "${GREP_WP_OPTIONS_STRING_DEVELOPMENT}" ]]; then
        /usr/bin/php -qCr "include '/var/www/html/dev/wp-admin/install.php'; wp_install('SlickStack', '\"${SFTP_USER}\"', '\"${SFTP_USER}\"@\"${SITE_DOMAIN_EXCLUDING_WWW}\"', 1, '', \"${SFTP_PASSWORD}\", 'en_US');"
        mysql --execute="UPDATE ${DB_PREFIX}options SET option_value='Lightning-fast WordPress on Nginx' WHERE option_name='blogdescription';"
    fi
fi

####################################################################################################
#### J. SS-Install-WordPress-Core: Modify Site Domains In Database #################################
####################################################################################################

## here we manually fix certain fields in the database to ensure proper functionality ##
## this fix required for WP Multisite (wp-config.php enough for single sites) ##

## SNIPPET: ss-install-wordpress-config, ss-install-wordpress-core
## UPDATED: 28MAR2022

## production ##
if [[ -n $(mysql --execute "SHOW TABLES FROM ${DB_NAME} WHERE Tables_in_${DB_NAME} LIKE '${DB_PREFIX}options';" 2> /dev/null) ]]; then
    
    mysql --execute="UPDATE ${DB_NAME}.${DB_PREFIX}options SET option_value='https://${SITE_DOMAIN}' WHERE option_name='home'";
    mysql --execute="UPDATE ${DB_NAME}.${DB_PREFIX}options SET option_value='https://${SITE_DOMAIN}' WHERE option_name='siteurl'";
    
fi

## staging ##
if [[ "$STAGING_SITE" == "true" ]]; then 
    
    if [[ -n $(mysql --execute "SHOW TABLES FROM staging WHERE Tables_in_staging LIKE '${DB_PREFIX}options';" 2> /dev/null) ]]; then
    
        mysql --execute="UPDATE staging.${DB_PREFIX}options SET option_value='https://staging.${SITE_DOMAIN_EXCLUDING_WWW}' WHERE option_name='home'";
        mysql --execute="UPDATE staging.${DB_PREFIX}options SET option_value='https://staging.${SITE_DOMAIN_EXCLUDING_WWW}' WHERE option_name='siteurl'";
    fi
    
fi

## development ##
if [[ "$DEV_SITE" == "true" ]]; then 
    
    if [[ -n $(mysql --execute "SHOW TABLES FROM development WHERE Tables_in_development LIKE '${DB_PREFIX}options';" 2> /dev/null) ]]; then
    
        mysql --execute="UPDATE development.${DB_PREFIX}options SET option_value='https://dev.${SITE_DOMAIN_EXCLUDING_WWW}' WHERE option_name='home'";
        mysql --execute="UPDATE development.${DB_PREFIX}options SET option_value='https://dev.${SITE_DOMAIN_EXCLUDING_WWW}' WHERE option_name='siteurl'";
    fi

fi

####################################################################################################
#### K. SS-Install-WordPress-Core: Sync Production Database To Staging #############################
####################################################################################################

## we include the sync to staging while installing WordPress Core to avoid blank sites ##
## otherwise the staging site files/database would potentially display broken ##

## run ss-sync-staging ##
source "${PATH_SS_SYNC_STAGING}"

####################################################################################################
#### L. SS-Install-WordPress-Core: Purge Cache (PHP OPcache) #######################################
####################################################################################################

## run ss-purge-opcache ##
source "${PATH_SS_PURGE_OPCACHE}"

####################################################################################################
#### M. SS-Install-WordPress-Core: Reset Permissions (WordPress Core) ##############################
####################################################################################################

## run ss-perms-wordpress-core ##
source "${PATH_SS_PERMS_WORDPRESS_CORE}"

####################################################################################################
#### PLACEHOLDER: Reset Permissions (SlickStack Scripts) ###########################################
####################################################################################################

## we include this permissions reset in all cron jobs and bash scripts for redundancy ##
## chmod 0700 means only the root/sudo users can execute any SlickStack scripts ##

## THIS SNIPPET DOES NOT RELY ON SS-CONFIG OR SS-FUNCTIONS
## SNIPPET: ss bash scripts, ss cron jobs
## UPDATED: 02JUL2022

chown root:root /var/www/ss* ## must be root:root
chown root:root /var/www/crons/*cron* ## must be root:root
chown root:root /var/www/crons/custom/*cron* ## must be root:root
chmod 0700 /var/www/ss* ## 0700 means only root/sudo can execute
chmod 0700 /var/www/crons/*cron* ## 0700 means only root/sudo can execute
chmod 0700 /var/www/crons/custom/*cron* ## 0700 means only root/sudo can execute

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

## Ref: https://github.com/littlebizzy/throwaway-theme/blob/master/functions.php
## Ref: https://pressidium.com/blog/2020/wordpress-image-sizes-explained/
## Ref: https://developer.wordpress.org/cli/commands/core/install/
## Ref: https://www.linuxtweaks.in/how-to-install-wordpress-using-bash-script-and-wp-cli/
## Ref: https://stackoverflow.com/questions/10062513/install-wordpress-using-bash-shell-without-visiting-wp-admin-install-php
## Ref: https://serverascode.com/2014/06/22/automated-wordpress-database-deployment.html
## Ref: https://web.archive.org/web/20140711110900/http://www.openlogic.com/wazi/bid/324425/How-to-install-WordPress-from-the-command-line
## Ref: https://wordpress.org/support/article/how-to-install-wordpress/
## Ref: https://stackoverflow.com/questions/6781225/how-do-i-check-if-a-directory-has-child-directories/6781343
## Ref: https://www.cloudsavvyit.com/1081/check-a-value-in-a-mysql-database-from-a-linux-bash-script/
## Ref: https://www.php.net/manual/en/features.commandline.options.php
## Ref: https://stackoverflow.com/questions/33067909/bash-variable-under-a-mysql-query
## Ref: https://stackoverflow.com/questions/21526581/how-to-clear-hide-mysql-errors-from-command-prompt
## Ref: https://www.php.net/manual/en/features.commandline.options.php
## Ref: https://www.medo64.com/2016/07/random-blog-description-for-wordpress/
## Ref: https://github.com/wp-cli/wp-cli/issues/1319

## SS_EOF