#!/bin/bash

if [ "$(id -u)" != "0" ]; then
    echo -e "\033[31mThis script requires superuser rights.\033[0m"
    exit 0
fi

trap 'echo -e "\033[31mfiles.sh: Something went wrong\033[0m"; exit 1' ERR
set -e

export DEBIAN_FRONTEND=noninteractive

BACKUP_LIST=/data/$SRV_START_DIR/config/backups.cfg
BACKUP_DIR="/backups/files"

# Checking the presence of a backups.list
if [ ! -f "$BACKUP_LIST" ]; then
    echo "List file not found: $BACKUP_LIST"
    exit 1
fi

echo 'check BACKUP_DIR...'
mkdir -p "$BACKUP_DIR"

echo 'Creating files backup...'

# Reading a list of directories for backup
while IFS= read -r DIR; do
    # Ignore lines starting with #
    if [[ "$DIR" =~ ^#.* ]]; then
        continue
    fi

    # Let's make sure the line is not empty
    if [ -n "$DIR" ]; then
        # Let's make sure the directory exists
        if [ ! -d "$DIR" ]; then
            echo "Directory not found: $DIR"
            continue
        fi

        # Formation of the archive name
        BASENAME=$(basename "$DIR")
        TIMESTAMP=$(date +%d-%m-%Y_%H%M%S)
        ARCHIVE_NAME="${BASENAME}_${TIMESTAMP}.tar.gz"

        # Creating a directory to store backups of this folder
        BACKUP_FOLDER="${BACKUP_DIR}/${BASENAME}"
        mkdir -p "$BACKUP_FOLDER"

        echo 'Pack to tar.gz...'
        tar -czf "${BACKUP_FOLDER}/${ARCHIVE_NAME}" -C "$(dirname "$DIR")" "$BASENAME"

        # Checking the success of the backup
        if [ $? -eq 0 ]; then
            echo "Backup successfully created: ${BACKUP_FOLDER}/${ARCHIVE_NAME}"
        else
            echo "Error when creating a backup: ${BACKUP_FOLDER}/${ARCHIVE_NAME}"
        fi
    fi
done < "$BACKUP_LIST"

trap - ERR
echo "The backup of all specified directories has been completed successfully"