#!/usr/bin/env bash

DATE=$(date -I)
BACKUP_DIR=$1

if [ -z "$BACKUP_DIR" ]
  then
    echo "No backup dir"
fi

all_containers=$(docker ps --format "{{.ID}}:{{ .Image }}")

for line in $all_containers
do
    IFS=':' read -a container_details <<< $line

    container_name=${container_details[1]}
    container_id=${container_details[0]}
    backup_name=$BACKUP_DIR/$db_name-$DATE.sql

    case "$container_name" in
    "mariadb")
        db_name=$(docker exec $container_id bash -c 'echo $MYSQL_USER')
        echo Backing up mariadb $db_name to $backup_name
        docker exec $container_id bash -c 'mysqldump -u $MYSQL_USER -p$MYSQL_PASSWORD --all-databases' | pv > $backup_name
        ;;

    "postgres")
        db_name=$(docker exec $container_id bash -c 'echo $POSTGRES_USER')
        echo Backing up postgres $db_name to $backup_name
        docker exec $container_id bash -c 'PGPASSWORD=$POSTGRES_PASSWORD pg_dumpall -U $POSTGRES_USER' | pv > $backup_name
        ;;
    esac
done

echo "Setting user permissions..."
chown -R root:root $BACKUP_DIR