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#!/bin/bash
set -e
set -o pipefail

wp_config_get()
{
	sed -e 's/\r//g' -ne \
		"s/^define *( *'$1' *, *'\([^']*\)' *) *; *$/\1/p" \
		< "$wp_config"
}

wp_config_table_prefix_get()
{
	sed -e 's/\r//g' -ne \
		"s/^\$table_prefix *= *'\\([^']*\\)' *; *$/\\1/p" \
		< "$wp_config"
}

find_wp_config()
{
	# If input contains a slash then it is an absolute path.
	# Otherwise it is a subdirectory or subvolume of <file:///srv>.
	case "$1" in
		*/*) ;;
		*) set -- /srv/"$1" ;;
	esac

	for wp_config in \
		"$1" \
		"$1"/wp-config.php \
		"$1"/wordpress/wp-config.php \
		"$1"/public_html/wp-config.php \
		"$1"/public_html/wordpress/wp-config.php
	do
		if [ -f "$wp_config" ]
		then
			return
		fi
	done
	false
}

if [ $# = 0 ]
then
	prefix=/srv/
	suffix=/public_html
	json='[ { site: $SITE, wordpress_config: .  } ]'
	for SITE in $prefix*$suffix
	do
		SITE=${SITE%$suffix}
		SITE=${SITE#$prefix}
		"$0" "$SITE" |
		jq --arg SITE "$SITE" "$json"
	done |
	jq -s add
	exit
elif [ $# != 1 ]
then
	exit -1
fi

find_wp_config "$1"

db_name=$(wp_config_get DB_NAME)
[ "$db_name" ]
db_host=$(wp_config_get DB_HOST)
[ "$db_host" ]
db_user=$(wp_config_get DB_USER)
[ "$db_user" ]
db_password=$(wp_config_get DB_PASSWORD)
[ "$db_password" ]
table_prefix=$(wp_config_table_prefix_get)

jq -n \
	--arg h "$db_host" \
	--arg u "$db_user" \
	--arg p "$db_password" \
	--arg n "$db_name" \
	--arg t "$table_prefix" \
	'{ db_host: $h
	 , db_user: $u
	 , db_password: $p
	 , db_name: $n
	 , table_prefix: $t
	 }'