prestashop_ynh/scripts/.fonctions

#!/bin/bash

#=================================================
# CHECKING
#=================================================

ynh_version="2.4"

YNH_VERSION () {	# Renvoi le numéro de version de la moulinette Yunohost
	ynh_version=$(sudo yunohost -v | grep "moulinette:" | cut -d' ' -f2 | cut -d'.' -f1,2)
}

CHECK_VAR () {	# Verifies that the variable is not empty.
	# $1 = Variable to be checked
	# $2 = Display text on error
	test -n "$1" || (echo "$2" >&2 && false)
}

CHECK_USER () {	# Vérifie la validité de l'user admin
# $1 = Variable de l'user admin.
	ynh_user_exists "$1" || ynh_die "Wrong user"
}

CHECK_DOMAINPATH () {	# Vérifie la disponibilité du path et du domaine.
	sudo yunohost app checkurl $domain$path -a $app
}

CHECK_FINALPATH () {	# Vérifie que le dossier de destination n'est pas déjà utilisé.
	final_path=/var/www/$app
	test ! -e "$final_path" || ynh_die "This path already contains a folder"
}

CHECK_PATH () {	# Checks / at the beginning of the path. And his absence at the end.
	if [ "${path:0:1}" != "/" ]; then    # If the first character is not /
		path="/$path"    # Add / at the beginning of path
	fi
	if [ "${path:${#path}-1}" == "/" ] && [ ${#path} -gt 1 ]; then    # If the last character is a / and it is not the only character.
		path="${path:0:${#path}-1}"	# Delete last character
	fi
}

#=================================================
# DISPLAYING
#=================================================

NO_PRINT () {	# Supprime l'affichage dans stdout pour la commande en argument.
	set +x
	eval "$@"
	set -x
}

WARNING () {	# Écrit sur le canal d'erreur pour passer en warning.
	eval "$@" >&2
}

SUPPRESS_WARNING () {	# Force l'écriture sur la sortie standard
	eval "$@" 2>&1
}

QUIET () {	# Redirige la sortie standard dans /dev/null
	eval "$@" > /dev/null
}

ALL_QUIET () {	# Redirige la sortie standard et d'erreur dans /dev/null
	eval "$@" > /dev/null 2>&1
}

#=================================================
# Create a database and a dedicated user in the name of the app
#=================================================
GENERATE_DB () {	
	# $1 = Database name
	# Generates a random password.
	db_user=$1
	db_pwd=$(head -n20 /dev/urandom | tr -c -d 'A-Za-z0-9' | head -c20)
	CHECK_VAR "$db_pwd" "db_pwd empty"
	# Uses '$ app' as user name and database
	# Initializes the database and stores the mysql password.
	ynh_mysql_create_db "$db_user" "$db_user" $db_pwd
	ynh_app_setting_set $app mysqlpwd $db_pwd
}

#=================================================
# SETUP
#=================================================

SETUP_SOURCE () {	# Télécharge la source, décompresse et copie dans $final_path
	src_url=$(cat ../conf/app.src | grep SOURCE_URL | cut -d= -f2)
	src_checksum=$(cat ../conf/app.src | grep SOURCE_SUM | cut -d= -f2)
	# Download sources from the upstream
	sudo wget -nv -O source.zip $src_url
	# Vérifie la somme de contrôle de la source téléchargée.
	echo "$src_checksum source.zip" | md5sum -c --status || ynh_die "Corrupt source"
	# Extract source into the app dir
	sudo mkdir -p $final_path
	sudo mv source.zip $final_path/source.zip
	pushd $final_path
	sudo unzip source.zip
	sudo rm Install_PrestaShop.html index.php
	sudo unzip prestashop.zip
	sudo rm prestashop.zip
	sudo rm source.zip
}

POOL_FPM () {	# Créer le fichier de configuration du pool php-fpm et le configure.
	sed -i "s@__NAMETOCHANGE__@$app@g" ../conf/php-fpm.conf
	sed -i "s@__FINALPATH__@$final_path@g" ../conf/php-fpm.conf
	sed -i "s@__USER__@$app@g" ../conf/php-fpm.conf
	finalphpconf=/etc/php5/fpm/pool.d/$app.conf
	sudo cp ../conf/php-fpm.conf $finalphpconf
	sudo chown root: $finalphpconf
	finalphpini=/etc/php5/fpm/conf.d/20-$app.ini
	sudo cp ../conf/php-fpm.ini $finalphpini
	sudo chown root: $finalphpini
	sudo service php5-fpm reload
}

EXIT_PROPERLY () {	# Causes the script to stop in the event of an error. And clean the residue.
	trap '' ERR
	echo -e "\e[91m \e[1m"	# Shell in light red bold
	echo -e "!!\n  $app install's script has encountered an error. Installation was cancelled.\n!!" >&2

	if type -t CLEAN_SETUP > /dev/null; then	# Checks the existence of the function before executing it.
		CLEAN_SETUP	# Call the specific cleanup function of the install script.
	fi

	# Compensates the ssowat bug that does not remove the app's input in case of installation error.
	sudo sed -i "\@\"$domain$path/\":@d" /etc/ssowat/conf.json

	if [ "$ynh_version" = "2.2" ]; then
		/bin/bash $script_dir/remove
	fi

	ynh_die
}

TRAP_ON () {	# Activate signal capture
	trap EXIT_PROPERLY ERR	# Capturing exit signals on error
}

TRAP_OFF () {	# Ignoring signal capture until TRAP_ON
	trap '' ERR	# Ignoring exit signals
}

#=================================================
# REMOVE
#=================================================

REMOVE_NGINX_CONF () {	# Suppression de la configuration nginx
	if [ -e "/etc/nginx/conf.d/$domain.d/$app.conf" ]; then	# Delete nginx config
		echo "Delete nginx config"
		sudo rm "/etc/nginx/conf.d/$domain.d/$app.conf"
		sudo service nginx reload
	fi
}

REMOVE_FPM_CONF () {	# Suppression de la configuration du pool php-fpm
	if [ -e "/etc/php5/fpm/pool.d/$app.conf" ]; then	# Delete fpm config
		echo "Delete fpm config"
		sudo rm "/etc/php5/fpm/pool.d/$app.conf"
	fi
	if [ -e "/etc/php5/fpm/conf.d/20-$app.ini" ]; then	# Delete php config
		echo "Delete php config"
		sudo rm "/etc/php5/fpm/conf.d/20-$app.ini"
	fi
	sudo service php5-fpm reload
}

SECURE_REMOVE () {      # Suppression de dossier avec vérification des variables
	chaine="$1"	# L'argument doit être donné entre quotes simple '', pour éviter d'interpréter les variables.
	no_var=0
	while (echo "$chaine" | grep -q '\$')	# Boucle tant qu'il y a des $ dans la chaine
	do
		no_var=1
		global_var=$(echo "$chaine" | cut -d '$' -f 2)	# Isole la première variable trouvée.
		only_var=\$$(expr "$global_var" : '\([A-Za-z0-9_]*\)')	# Isole complètement la variable en ajoutant le $ au début et en gardant uniquement le nom de la variable. Se débarrasse surtout du / et d'un éventuel chemin derrière.
		real_var=$(eval "echo ${only_var}")		# `eval "echo ${var}` permet d'interpréter une variable contenue dans une variable.
		if test -z "$real_var" || [ "$real_var" = "/" ]; then
			WARNING echo "Variable $only_var is empty, suppression of $chaine cancelled."
			return 1
		fi
		chaine=$(echo "$chaine" | sed "s@$only_var@$real_var@")	# remplace la variable par sa valeur dans la chaine.
	done
	if [ "$no_var" -eq 1 ]
	then
		if [ -e "$chaine" ]; then
			echo "Delete directory $chaine"
			sudo rm -r "$chaine"
		fi
		return 0
	else
		WARNING echo "No detected variable."
		return 1
	fi
}

REMOVE_SYS_USER () {   # Supprime l'utilisateur système dédié à l'app
    if ynh_system_user_exists "$app"	# Test l'existence de l'utilisateur
    then
    	sudo userdel $app
    fi
}

#=================================================
# BACKUP
#=================================================

BACKUP_FAIL_UPGRADE () {
	WARNING echo "Upgrade failed."
	if ALL_QUIET sudo yunohost backup list | grep -q $app-before-upgrade$backup_number; then	# Vérifie l'existence de l'archive avant de supprimer l'application et de restaurer
		sudo yunohost app remove $app	# Supprime l'application avant de la restaurer.
		sudo yunohost backup restore --ignore-hooks $app-before-upgrade$backup_number --apps $app --force	# Restore the backup if upgrade failed
		ynh_die "The app was restored to the way it was before the failed upgrade."
	fi
}

BACKUP_BEFORE_UPGRADE () {	# Backup the current version of the app, restore it if the upgrade fails
	backup_number=1
	old_backup_number=2
	if ALL_QUIET sudo yunohost backup list | grep -q $app-before-upgrade1; then	# Vérifie l'existence d'une archive déjà numéroté à 1.
		backup_number=2	# Et passe le numéro de l'archive à 2
		old_backup_number=1
	fi

	sudo yunohost backup create --ignore-hooks --apps $app --name $app-before-upgrade$backup_number	# Créer un backup différent de celui existant.
	if [ "$?" -eq 0 ]; then	# Si le backup est un succès, supprime l'archive précédente.
		if ALL_QUIET sudo yunohost backup list | grep -q $app-before-upgrade$old_backup_number; then	# Vérifie l'existence de l'ancienne archive avant de la supprimer, pour éviter une erreur.
			QUIET sudo yunohost backup delete $app-before-upgrade$old_backup_number
		fi
	else	# Si le backup a échoué
		ynh_die "Backup failed, the upgrade process was aborted."
	fi
}

#=================================================
# CONFIGURATION
#=================================================

STORE_MD5_CONFIG () {	# Enregistre la somme de contrôle du fichier de config
# $1 = Nom du fichier de conf pour le stockage dans settings.yml
# $2 = Nom complet et chemin du fichier de conf.
	ynh_app_setting_set $app $1_file_md5 $(sudo md5sum "$2" | cut -d' ' -f1)
}

CHECK_MD5_CONFIG () {	# Créé un backup du fichier de config si il a été modifié.
# $1 = Nom du fichier de conf pour le stockage dans settings.yml
# $2 = Nom complet et chemin du fichier de conf.
	if [ "$(ynh_app_setting_get $app $1_file_md5)" != $(sudo md5sum "$2" | cut -d' ' -f1) ]; then
		sudo cp -a "$2" "$2.backup.$(date '+%d.%m.%y_%Hh%M,%Ss')"	# Si le fichier de config a été modifié, créer un backup.
	fi
}


#=================================================
#=================================================
# FUTUR YNH HELPERS
#=================================================
# Importer ce fichier de fonction avant celui des helpers officiel
# Ainsi, les officiels prendront le pas sur ceux-ci le cas échéant
#=================================================

# Normalize the url path syntax
# Handle the slash at the beginning of path and its absence at ending
# Return a normalized url path
#
# example: url_path=$(ynh_normalize_url_path $url_path)
#          ynh_normalize_url_path example -> /example
#          ynh_normalize_url_path /example -> /example
#          ynh_normalize_url_path /example/ -> /example
#
# usage: ynh_normalize_url_path path_to_normalize
# | arg: url_path_to_normalize - URL path to normalize before using it
ynh_normalize_url_path () {
	path=$1
	test -n "$path" || ynh_die "ynh_normalize_url_path expect a URL path as first argument and received nothing."
	if [ "${path:0:1}" != "/" ]; then    # If the first character is not a /
		path="/$path"    # Add / at begin of path variable
	fi
	if [ "${path:${#path}-1}" == "/" ] && [ ${#path} -gt 1 ]; then    # If the last character is a / and that not the only character.
		path="${path:0:${#path}-1}"	# Delete the last character
	fi
	echo $path
}

# Correct the name given in argument for mariadb
#
# Avoid invalid name for your database
#
# Exemple: dbname=$(ynh_make_valid_dbid $app)
#
# usage: ynh_make_valid_dbid name
# | arg: name - name to correct
# | ret: the corrected name
ynh_make_valid_dbid () {
	dbid=${1//[-.]/_}	# Mariadb doesn't support - and . in the name of databases. It will be replace by _
	echo $dbid
}

# Install dependencies with a equivs control file
#
# usage: ynh_app_dependencies dep [dep [...]]
# | arg: dep - the package name to install in dependence
ynh_app_dependencies () {
    dependencies=$@
    manifest_path="../manifest.json"
    if [ ! -e "$manifest_path" ]; then
    	manifest_path="../settings/manifest.json"	# Into the restore script, the manifest is not at the same place
    fi
    version=$(sudo python3 -c "import sys, json;print(json.load(open(\"$manifest_path\"))['version'])")	# Retrieve the version number in the manifest file.
    dep_app=${app//_/-}	# Replace all '_' by '-'
    cat > ./${dep_app}-ynh-deps.control << EOF	# Make a control file for equivs-build
Section: misc
Priority: optional
Package: ${dep_app}-ynh-deps
Version: ${version}
Depends: ${dependencies}
Architecture: all
Description: Fake package for ${app} (YunoHost app) dependencies
 This meta-package is only responsible of installing its dependencies.
EOF
    ynh_package_install_from_equivs ./${dep_app}-ynh-deps.control \
        || ynh_die "Unable to install dependencies"	# Install the fake package and its dependencies
}

# Remove fake package and its dependencies
#
# Dependencies will removed only if no other package need them.
#
# usage: ynh_remove_app_dependencies
ynh_remove_app_dependencies () {
    dep_app=${app/_/-}	# Replace all '_' by '-'
    ynh_package_autoremove ${dep_app}-ynh-deps	# Remove the fake package and its dependencies if they not still used.
}

# Use logrotate to manage the logfile
#
# usage: ynh_use_logrotate [logfile]
# | arg: logfile - absolute path of logfile
#
# If no argument provided, a standard directory will be use. /var/log/${app}
# You can provide a path with the directory only or with the logfile.
# /parentdir/logdir/
# /parentdir/logdir/logfile.log
#
# It's possible to use this helper several times, each config will added to same logrotate config file.
ynh_use_logrotate () {
	if [ -n "$1" ]; then
		if [ "$(echo ${1##*.})" == "log" ]; then	# Keep only the extension to check if it's a logfile
			logfile=$1	# In this case, focus logrotate on the logfile
		else
			logfile=$1/.log	# Else, uses the directory and all logfile into it.
		fi
	else
		logfile="/var/log/${app}/.log" # Without argument, use a defaut directory in /var/log
	fi
	cat > ./${app}-logrotate << EOF	# Build a config file for logrotate
$logfile {
		# Rotate if the logfile exceeds 100Mo
	size 100M
		# Keep 12 old log maximum
	rotate 12
		# Compress the logs with gzip
	compress
		# Compress the log at the next cycle. So keep always 2 non compressed logs
	delaycompress
		# Copy and truncate the log to allow to continue write on it. Instead of move the log.
	copytruncate
		# Do not do an error if the log is missing
	missingok
		# Not rotate if the log is empty
	notifempty
		# Keep old logs in the same dir
	noolddir
}
EOF
	sudo mkdir -p $(dirname "$logfile")	# Create the log directory, if not exist
	cat ${app}-logrotate | sudo tee -a /etc/logrotate.d/$app > /dev/null	# Append this config to the others for this app. If a config file already exist
}

# Remove the app's logrotate config.
#
# usage: ynh_remove_logrotate
ynh_remove_logrotate () {
	if [ -e "/etc/logrotate.d/$app" ]; then
		sudo rm "/etc/logrotate.d/$app"
	fi
}

# Find a free port and return it
#
# example: port=$(ynh_find_port 8080)
#
# usage: ynh_find_port begin_port
# | arg: begin_port - port to start to search
ynh_find_port () {
	port=$1
	test -n "$port" || ynh_die "The argument of ynh_find_port must be a valid port."
	while netcat -z 127.0.0.1 $port       # Check if the port is free
	do
		port=$((port+1))	# Else, pass to next port
	done
	echo $port
}