commands

#!/usr/bin/env bash
source "$PLUGIN_PATH/common/functions"
# Reset bash mode from importing the functions
set +exo pipefail
# Fail on equation failure
set -e

# Check if name is specified
if [[ $1 == redis:* ]]; then
    if [[ -z $2 ]]; then
        dokku_log_fail "You must specify an app name"
    else
        APP="$2"
    fi
fi

REDIS_CONTAINER_NAME="redis-$APP"
REDIS_FLAG_PERSISTENCE_FILE="$DOKKU_ROOT/$APP/REDIS"
REDIS_FLAG_LINK_FILE="$DOKKU_ROOT/$APP/LINK"
REDIS_VOLUME_DIR="$DOKKU_ROOT/.redis/volume-$APP"
REDIS_CONTAINER_ID=$(docker ps | grep "$REDIS_CONTAINER_NAME" |  awk '{print $1}')

case "$1" in

  redis:enable)
    verify_app_name $APP

    dokku_log_info1 "Enabling Redis for $APP..."

    touch $REDIS_FLAG_PERSISTENCE_FILE

    dokku_log_info2 "Redis enabled for $APP"
    dokku_log_verbose "Redis will be started on next build / deploy"
    ;;

  redis:destroy)
    if [[ ! -f $REDIS_FLAG_PERSISTENCE_FILE ]] && [[ ! -f $REDIS_FLAG_LINK_FILE ]] && [[ ! -d $REDIS_VOLUME_DIR ]] && [[ -z $REDIS_CONTAINER_ID ]] && [[ -z $(dokku config:get $APP REDIS_URL) ]]; then
        dokku_log_info2 "No Redis instance / leftovers found for $APP"
        exit 0
    fi

    if [[ -z "$2" ]]; then # <-- If not called from event
        confirmed=0        # If this is called from event, cannot get input
        while [[ $confirmed -eq 0 ]]
        do
            dokku_log_warn "WARNING: Potentially Destructive Action"
            dokku_log_warn "This command will destroy the Redis instance for"
            dokku_log_warn "$APP (including all volumes and data)."
            dokku_log_warn "To proceed, type \"$APP\""
            echo

            read -p "> " app_name_verification
            if [[ "$app_name_verification" != "$APP" ]]; then
                dokku_log_warn "Confirmation did not match."
                echo
            else
                confirmed=1
            fi
        done
    fi

    dokku_log_info1 "Destroying Redis for $APP..."

    # Disable Redis autostart
    [[ -f "$REDIS_FLAG_PERSISTENCE_FILE" ]] && rm "$REDIS_FLAG_PERSISTENCE_FILE"

    # Stop the container
    if [[ ! -z $REDIS_CONTAINER_ID ]]; then
        docker stop $REDIS_CONTAINER_ID > /dev/null
    fi

    # Remove docker link
    if [[ -f $REDIS_FLAG_LINK_FILE ]]; then
        dokku link:delete $APP $REDIS_CONTAINER_NAME redis
    fi

    # Remove the container
    if [[ ! -z $REDIS_CONTAINER_ID ]]; then
        docker rm $REDIS_CONTAINER_ID > /dev/null
    fi

    # Remove persistent volume
    if [[ -d $REDIS_VOLUME_DIR ]]; then
        rm -rf $REDIS_VOLUME_DIR
    fi

    # Remove Redis autoconfiguration variable
    dokku config:unset-norestart "$APP" "REDIS_URL"

    dokku_log_info2 "Redis instance / volume destroyed:"
    dokku_log_verbose "Application: $APP"
    ;;

  help)
    cat && cat<<EOF
    redis:enable <app>, Enable Redis for an app for next build
    redis:destroy <app>, Destroy Redis container and volume of an app
EOF
    ;;

  *)
    exit $DOKKU_NOT_IMPLEMENTED_EXIT
    ;;

esac