core

#
# Copyright (c) 2018-2020 P3TERX <https://p3terx.com>
#
# This is free software, licensed under the MIT License.
# See /LICENSE for more information.
#
# https://github.com/P3TERX/aria2.conf
# File name：core
# Description: Aria2 additional function script core file
# Version: 3.0
#

TASK_GID=$1
FILE_NUM=$2
FILE_PATH=$3
ARIA2_CONF_DIR="$(dirname $0)"
ARIA2_CONF="${ARIA2_CONF_DIR}/aria2.conf"
ARIA2_SESSION="${ARIA2_CONF_DIR}/aria2.session"
SCRIPT_CONF="${ARIA2_CONF_DIR}/script.conf"
RED_FONT_PREFIX="\033[31m"
LIGHT_GREEN_FONT_PREFIX="\033[1;32m"
YELLOW_FONT_PREFIX="\033[1;33m"
LIGHT_PURPLE_FONT_PREFIX="\033[1;35m"
FONT_COLOR_SUFFIX="\033[0m"
INFO="[${LIGHT_GREEN_FONT_PREFIX}INFO${FONT_COLOR_SUFFIX}]"
ERROR="[${RED_FONT_PREFIX}ERROR${FONT_COLOR_SUFFIX}]"
WARRING="[${YELLOW_FONT_PREFIX}WARRING${FONT_COLOR_SUFFIX}]"

DATE_TIME() {
    date +"%m/%d %H:%M:%S"
}

CHECK_PARAMETER() {
    [[ $# -eq 0 ]] && {
        echo && echo -e "${ERROR} This script can only be used by passing parameters through Aria2."
        exit 1
    }
}

CHECK_FILE_NUM() {
    [[ ${FILE_NUM} -eq 0 ]] && {
        echo && echo -e "$(DATE_TIME) ${WARRING} Number of files is zero, maybe a Magnet Link."
        exit 0
    }
}

CHECK_SCRIPT_CONF() {
    if [[ -f "${SCRIPT_CONF}" ]]; then
        LOAD_SCRIPT_CONF
    else
        echo && echo "!!! '${SCRIPT_CONF}' does not exist !!!"
        exit 1
    fi
}

LOAD_SCRIPT_CONF() {
    DRIVE_NAME="$(grep ^drive-name "${SCRIPT_CONF}" | cut -d= -f2-)"
    DRIVE_DIR="$(grep ^drive-dir "${SCRIPT_CONF}" | cut -d= -f2-)"
    UPLOAD_LOG_PATH="$(grep ^upload-log "${SCRIPT_CONF}" | cut -d= -f2-)"
    DEST_DIR="$(grep ^dest-dir "${SCRIPT_CONF}" | cut -d= -f2-)"
    MOVE_LOG_PATH="$(grep ^move-log "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_ON_REMOVED="$(grep ^delete-on-removed "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_ON_ERROR="$(grep ^delete-on-error "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_ON_UNKNOWN="$(grep ^delete-on-unknown "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_DOT_ARIA2="$(grep ^delete-dot-aria2 "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_DOT_TORRENT="$(grep ^delete-dot-torrent "${SCRIPT_CONF}" | cut -d= -f2-)"
    DELETE_EMPTY_DIR="$(grep ^delete-empty-dir "${SCRIPT_CONF}" | cut -d= -f2-)"
    MIN_SIZE="$(grep ^min-size "${SCRIPT_CONF}" | cut -d= -f2-)"
    INCLUDE_FILE="$(grep ^include-file "${SCRIPT_CONF}" | cut -d= -f2-)"
    EXCLUDE_FILE="$(grep ^exclude-file "${SCRIPT_CONF}" | cut -d= -f2-)"
}

READ_ARIA2_CONF() {
    if [ ! -f "${ARIA2_CONF}" ]; then
        echo -e "$(DATE_TIME) ${ERROR} '${ARIA2_CONF}' does not exist."
        exit 1
    else
        ARIA2_DOWNLOAD_DIR=$(grep ^dir "${ARIA2_CONF}" | cut -d= -f2-)
        RPC_PORT=$(grep ^rpc-listen-port "${ARIA2_CONF}" | cut -d= -f2-)
        RPC_SECRET=$(grep ^rpc-secret "${ARIA2_CONF}" | cut -d= -f2-)
        SAVE_SESSION_INTERVAL=$(grep ^save-session-interval "${ARIA2_CONF}" | cut -d= -f2-)
        [[ ${ARIA2_DOWNLOAD_DIR} && ${RPC_PORT} && ${SAVE_SESSION_INTERVAL} ]] || {
            echo -e "$(DATE_TIME) ${ERROR} Aria2 configuration file incomplete."
            exit 1
        }
        RPC_ADDRESS="localhost:${RPC_PORT}/jsonrpc"
    fi
}

RPC_TASK_INFO() {
    if [[ "${RPC_SECRET}" ]]; then
        RPC_PAYLOAD='{"jsonrpc":"2.0","method":"aria2.tellStatus","id":"P3TERX","params":["token:'${RPC_SECRET}'","'${TASK_GID}'"]}'
    else
        RPC_PAYLOAD='{"jsonrpc":"2.0","method":"aria2.tellStatus","id":"P3TERX","params":["'${TASK_GID}'"]}'
    fi
    curl "${RPC_ADDRESS}" -fsSd "${RPC_PAYLOAD}" || curl "https://${RPC_ADDRESS}" -kfsSd "${RPC_PAYLOAD}"
}

GET_TASK_INFO() {
    READ_ARIA2_CONF
    RPC_RESULT="$(RPC_TASK_INFO)"
}

GET_DOWNLOAD_DIR() {
    [[ -z ${RPC_RESULT} ]] && {
        echo -e "$(DATE_TIME) ${ERROR} Aria2 RPC interface error!"
        exit 1
    }
    DOWNLOAD_DIR=$(echo "${RPC_RESULT}" | jq -r '.result.dir')
    [[ -z "${DOWNLOAD_DIR}" || "${DOWNLOAD_DIR}" = "null" ]] && {
        echo ${RPC_RESULT} | jq '.result'
        echo -e "$(DATE_TIME) ${ERROR} Failed to get download directory!"
        exit 1
    }
}

GET_TASK_STATUS() {
    TASK_STATUS=$(echo "${RPC_RESULT}" | jq -r '.result.status')
    [[ -z "${TASK_STATUS}" || "${TASK_STATUS}" = "null" ]] && {
        echo "${RPC_RESULT}" | jq '.result'
        echo -e "$(DATE_TIME) ${ERROR} Failed to get task status!"
        exit 1
    }
}

GET_INFO_HASH() {
    INFO_HASH=$(echo "${RPC_RESULT}" | jq -r '.result.infoHash')
    if [[ -z "${INFO_HASH}" ]]; then
        echo "${RPC_RESULT}" | jq '.result'
        echo -e "$(DATE_TIME) ${ERROR} Failed to get Info Hash!"
        exit 1
    elif [[ "${INFO_HASH}" = "null" ]]; then
        return 1
    else
        TORRENT_FILE="${DOWNLOAD_DIR}/${INFO_HASH}.torrent"
    fi
}

CONVERSION_PATH() {
    RELATIVE_PATH="${FILE_PATH#${DOWNLOAD_DIR}/}"
    TASK_FILE_NAME="${RELATIVE_PATH%%/*}"
    TASK_PATH="${DOWNLOAD_DIR}/${TASK_FILE_NAME}"
    DEST_PATH_SUFFIX="${TASK_PATH#${ARIA2_DOWNLOAD_DIR}}"
}

OUTPUT_LOG() {
    echo -e "${LOG}"
    [[ "${LOG_PATH}" && -e "${LOG_PATH%/*}" ]] && echo -e "${LOG}" | sed "s,\x1B\[[0-9;]*m,,g" >>"${LOG_PATH}"
}

CHECK_DOT_ARIA2() {
    if [ -f "${FILE_PATH}.aria2" ]; then
        DOT_ARIA2_FILE="${FILE_PATH}.aria2"
    elif [ -f "${TASK_PATH}.aria2" ]; then
        DOT_ARIA2_FILE="${TASK_PATH}.aria2"
    else
        DOT_ARIA2_FILE='null'
        echo -e "$(DATE_TIME) ${INFO} .aria2 file does not exist."
        return 1
    fi
}

DELETE_DOT_ARIA2() {
    if [[ "${DELETE_DOT_ARIA2}" = "true" ]] && CHECK_DOT_ARIA2; then
        echo -e "$(DATE_TIME) ${INFO} Deleting .aria2 file ..."
        rm -vf "${DOT_ARIA2_FILE}"
    fi
}

DELETE_TORRENT_FILES() {
    sleep $(($SAVE_SESSION_INTERVAL + 1))
    TORRENT_FILES=$(ls "${DOWNLOAD_DIR}" | grep '.*.torrent')
    if [[ -f "${ARIA2_SESSION}" && -n "${TORRENT_FILES}" ]]; then
        for TORRENT_FILE in "${TORRENT_FILES}"; do
            if [[ -n "${TORRENT_FILE}" && -z $(cat "${ARIA2_SESSION}" | grep -i "${TORRENT_FILE%.*}") ]]; then
                echo -e "$(DATE_TIME) ${INFO} Deleting .torrent file (enhanced) ..."
                rm -vf ${DOWNLOAD_DIR}/${TORRENT_FILE}
            fi
        done
    else
        [[ ! -f "${ARIA2_SESSION}" ]] &&
            echo -e "$(DATE_TIME) ${ERROR} '${ARIA2_SESSION}' does not exist." ||
            echo -e "$(DATE_TIME) ${WARRING} .torrent file does not exist."
    fi
}

DELETE_DOT_TORRENT() {
    if GET_INFO_HASH; then
        if [[ "${DELETE_DOT_TORRENT}" = "true" || "${DELETE_DOT_TORRENT}" = "normal" ]] && [[ -f "${TORRENT_FILE}" ]]; then
            echo -e "$(DATE_TIME) ${INFO} Deleting .torrent file ..."
            rm -vf ${TORRENT_FILE}
        elif [[ "${DELETE_DOT_TORRENT}" = "true" || "${DELETE_DOT_TORRENT}" = "enhanced" ]]; then
            DELETE_TORRENT_FILES
        elif [[ "${DELETE_DOT_TORRENT}" = "normal" ]]; then
            echo -e "$(DATE_TIME) ${WARRING} .torrent file may exist but cannot be found. Recommended to enable enhanced mode."
        else
            echo -e "$(DATE_TIME) ${INFO} Delete .torrent file function is disabled."
        fi
    else
        echo -e "$(DATE_TIME) ${INFO} General download task, skipped delete .torrent file."
    fi
}

DELETE_EMPTY_DIR() {
    if [[ "${DELETE_EMPTY_DIR}" = "true" ]]; then
        echo -e "$(DATE_TIME) ${INFO} Deleting empty directory ..."
        if [[ "${DOWNLOAD_DIR}" =~ "${ARIA2_DOWNLOAD_DIR}" ]]; then
            find "${ARIA2_DOWNLOAD_DIR}" ! -path "${ARIA2_DOWNLOAD_DIR}" -depth -type d -empty -exec rm -vrf {} \;
        else
            find "${DOWNLOAD_DIR}" -depth -type d -empty -exec rm -vrf {} \;
        fi
    fi
}

DELETE_EXCLUDE_FILE() {
    if [[ ${FILE_NUM} -gt 1 ]] && [[ -n ${MIN_SIZE} || -n ${INCLUDE_FILE} || -n ${EXCLUDE_FILE} ]]; then
        echo -e "${INFO} Deleting excluded files ..."
        [[ -n ${MIN_SIZE} ]] && find "${TASK_PATH}" -type f -size -${MIN_SIZE} -print0 | xargs -0 rm -vf
        [[ -n ${EXCLUDE_FILE} ]] && find "${TASK_PATH}" -type f -regextype posix-extended -iregex ".*\.(${EXCLUDE_FILE})" -print0 | xargs -0 rm -vf
        [[ -n ${INCLUDE_FILE} ]] && find "${TASK_PATH}" -type f -regextype posix-extended ! -iregex ".*\.(${INCLUDE_FILE})" -print0 | xargs -0 rm -vf
    fi
}

CLEAN_UP() {
    DELETE_DOT_ARIA2
    DELETE_DOT_TORRENT
    DELETE_EXCLUDE_FILE
    DELETE_EMPTY_DIR
}