#!    Name: isupload.sh
#!  Author: kittykat
#! Version: 2025.01.30
#!    Desc: Add support for downloading and processing of urls for a new host
#!   Usage: Copy this file into the ./${ScriptDir}/hosts/ folder
#!
#!
#! ------------ REQUIRED SECTION ---------------
#! @[UPDATE] HostAndDomainRegexes: This string is loaded into mad.sh and allows dynamic handling of new url data
#! Format: '/HostCode/HostNick/HostFuncPrefix:HostDomainRegex@'
#! HostCode: <aUniqueCodeForHost> (ie. 'fh' for filehaus -- cannot be used by other hosts)
#! HostNick: What is displayed throughout MAD output (ie. 'filehaus' -- "urls.txt has 10 filehaus.."  will be displayed)
#! HostFuncPrefix: <aUniqueStringThatMustPrefixHostFunctions> (ie. 'fh' -- fh_DownloadFile(), fh_FetchFileInfo() .. )
#!   * Note: Must begin with a letter a-z (functions beginning with numbers are no bueno)
#! HostDomainRegex: The regex used to verify matching urls
HostCode='isup'
HostNick='isupload'
HostFuncPrefix='isup'
HostUrls='isupload.com'
HostDomainRegex='^(http|https)://(.*\.)?isupload\.com'
#!
#! !! DO NOT UPDATE OR REMOVE !!
#! This merges the Required HostAndDomainRegexes into mad.sh
ListHostAndDomainRegexes=${ListHostAndDomainRegexes}'/'${HostCode}'/'${HostNick}'/'${HostFuncPrefix}'/'${HostUrls}':'${HostDomainRegex}'@'
#!
#!
#! ------------ (1) Host Main Download Function --------------- #
#!
#! @REQUIRED: Host Main Download function
#! Must be named specifically as such:
#! <HostFuncPrefix>_DownloadFile()
isup_DownloadFile() {
	local remote_url=${1}
	local file_url=${1}
    local filecnt=${2}
    warnAndRetryUnknownError=false
    exitDownloadError=false
    exitDownloadNotAvailable=false
	fileAlreadyDone=false
	download_inflight_path="${WorkDir}/.inflight/"
	mkdir -p "$download_inflight_path"
	completed_location="${WorkDir}/downloads/"
	tor_identity="${RANDOM}"
	finalAttempt="false"
	for ((z=0; z<=$MaxUrlRetries; z++)); do
	    if [[ $z -eq  $MaxUrlRetries ]] ; then
            finalAttempt="true"
	    fi  
        CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
        trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; echo ""; tput cnorm; exit" 0 1 2 3 6 15
        if isup_FetchFileInfo $finalAttempt && isup_GetFile "${filecnt}" $((z+1)) $finalAttempt ; then
            return 0
        elif [[ $z -lt $MaxUrlRetries ]]; then
            if [[ "${fileAlreadyDone}" == "true" ]] ; then
                break
            fi
            if [[ "${warnAndRetryUnknownError}" == "true" ]] ; then
                if [[ "${DebugAllEnabled}" == "true" ]] ; then
                    debugHtml "${remote_url##*/}" "error" "Retry due to an unknown issue: attempt #$((z+1)) of ${MaxUrlRetries}"
                fi
            fi
            if [[ "${exitDownloadError}" == "true" || "${exitDownloadNotAvailable}" == "true" ]] ; then
                if [[ "${DebugAllEnabled}" == "true" ]] ; then
                    debugHtml "${remote_url##*/}" "error" "Exit due to unrecoverable issue"
                fi
                rm -f "${WorkDir}/.flocks/${remote_url//[^a-zA-Z0-9]/}"
                break
            fi
            echo -e "\n${YELLOW}A recoverable error occurred, retry attempt $((z+1))/${MaxUrlRetries}${NC}"
            sleep 3
        fi
    done
    rm -f "${WorkDir}/.flocks/${remote_url//[^a-zA-Z0-9]/}"
}
#!
#! ------------- (2) Fetch File Info Function ----------------- #
#!
isup_FetchFileInfo() {
    finalAttempt=$1
    maxfetchretries=5
    isup_cookie_jar=""
    echo -e "${GREEN}# Fetching download link…${NC}"
    for ((i=1; i<=$maxfetchretries; i++)); do
        mkdir -p "${WorkDir}/.temp"
		isup_cookie_jar=$(mktemp "${WorkDir}/.temp/isup_cookies""${instance_no}"".XXXXXX")
        printf " ."
        tor_identity="${RANDOM}"
        CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
        trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; rm -f "${isup_cookie_jar}"; echo ""; tput cnorm; exit" 0 1 2 3 6 15
        response=$(tor_curl_request_extended --insecure -L -s -b "${isup_cookie_jar}" -c "${isup_cookie_jar}" "$remote_url")
        if [[ "${DebugAllEnabled}" == "true" ]] ; then
            debugHtml "${remote_url##*/}" "isup_dwnpage$i" "${response}"
        fi
		if [[ -z $response ]] ; then
		    rm -f "${isup_cookie_jar}";
		    if [[ $i == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract download link.${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                continue
            fi
		fi
		if grep -Eqi "Sorry, you are banned" <<< "$response"; then
            rm -f "${isup_cookie_jar}";
		    if [[ $i == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract download link.${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                continue
            fi
        fi
        if grep -Eqi "404 Not Found|File was removed|There is no such file|File was deleted|File not found" <<< "$response"; then
            rm -f "${isup_cookie_jar}";
            printf "\\n"
            echo -e "${RED}| The file was not found. It could be deleted or expired.${NC}"
            exitDownloadError=true
            removedDownload "${remote_url}"
            return 1
        fi
        if grep -Eqi 'input type="hidden" name="op" value="' <<< "$response"; then
            printf "\\n"
            echo -e "${GREEN}| Post link found.${NC}"
            post_action="${remote_url//https:/http:}"
            post_op=$(grep -oPi '(?<=input type="hidden" name="op" value=").*(?=">)' <<< "$response")
            post_id=$(grep -oPi '(?<=input type="hidden" name="id" value=").*(?=">)' <<< "$response")
            post_rand=$(grep -oPi '(?<=input type="hidden" name="rand" value=").*(?=">)' <<< "$response")
            post_referer=$(grep -oPi '(?<=input type="hidden" name="referer" value=").*(?=">)' <<< "$response")
            post_action=$(urlencode_literal_grouped_case_urlendingonly "${post_action}")
        fi
        if [[ -z "$post_action" ]] || [[ -z "$post_op" ]] || [[ -z "$post_id" ]] ; then
            rm -f "${isup_cookie_jar}";
            if [[ $i == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract download link [2].${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "Failed to extract download link [2]" ""
            	fi
                return 1
            else
                continue
            fi
        else
            break
        fi
    done
    echo -e "${GREEN}# Fetching download url…${NC}"
    for ((i=1; i<=$maxfetchretries; i++)); do
        printf " _"
        download_url=""
        CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
        trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; echo ""; rm -f $isup_cookie_jar; tput cnorm; exit" 0 1 2 3 6 15
	    form_data="op=$post_op&id=$post_id&rand=$post_rand&referer=$post_referer&method_free=&method_premium="
		response=$(tor_curl_request_extended --insecure -L -s -X POST \
		    -b "${isup_cookie_jar}" -c "${isup_cookie_jar}" \
		    --data "$form_data" "$post_action")
        if [[ "${DebugAllEnabled}" == "true" ]] ; then
            debugHtml "${remote_url##*/}" "isup_post" "post_action: ${post_action}"$'\n'"form_data: ${form_data}"$'\n'"${response}"
        fi
		if [[ -z $response ]] ; then
		    if [[ $i == $maxfetchretries ]] ; then
    		    rm -f "${isup_cookie_jar}";
                printf "\\n"
                echo -e "${RED}| Failed to extract download link [3].${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                tor_identity="${RANDOM}"
                continue
            fi
		fi
        if grep -Eqi '404 Not Found|No such file with this filename|File was deleted|File not found' <<< "$response"; then
            rm -f "${isup_cookie_jar}";
            printf "\\n"
            echo -e "${RED}| The file was not found. It could be deleted or expired.${NC}"
            exitDownloadError=true
            removedDownload "${remote_url}"
            return 1
        fi   
        if grep -Eqi 'Just a moment...' <<< "$response"; then
            if [[ $i == $maxfetchretries ]] ; then
    		    rm -f "${isup_cookie_jar}";
                printf "\\n"
                echo -e "${RED}| Failed to extract download link [3].${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                tor_identity="${RANDOM}"
                continue
            fi
        fi
        if grep -Eqi '<nobr>Filename: <b>' <<< "$response"; then
            filename=$(grep -oP -m 1 '(?<=<nobr>Filename: <b>).*?(?=<\/b><\/nobr><br>.*$)' <<< "$response")
        fi
        if ! grep -Eqi '<a href="http://isupload.com/cgi-bin/dl.cgi/' <<< "$response"; then
            printf "\\n"
            echo -e "${RED}| Failed to extract download link [4]${NC}"
            warnAndRetryUnknownError=true
            if [[ "${finalAttempt}" == "true" ]] ; then
			    rm -f "${isup_cookie_jar}";
        		failedRetryDownload "${remote_url}" "Failed to extract download link [4]" ""
        	fi
            return 1
        else
            printf "\\n"
            echo -e "${GREEN}| Download url found.${NC}"
            download_url=$(grep -oP -m 1 '(?<=a href="http://isupload.com/cgi-bin/dl.cgi/).*?(?=">.*$)' <<< "$response")
            download_url="${download_url//[$'\t\r\n']}"
            download_url='http://isupload.com/cgi-bin/dl.cgi/'$(urlencode_literal_grouped_case_urlendingonly "$download_url")
            break
        fi
    done
    rm -f "${isup_cookie_jar}";
    echo -e "${GREEN}# Fetching file info…${NC}"
    maxretries=3
    for ((j=1; j<=$maxretries; j++)); do        
        mkdir -p "${WorkDir}/.temp"
        if ((j > 1)); then
            tput rc; tput el;
        fi
        tput sc
        tor_identity="${RANDOM}"
        if ((j % 1 == 0)); then
            printf "| Retrieving Head (Get): attempt #$j"
            file_header=$(tor_curl_request --insecure -m 8 -s -D - -o /dev/null \
                -H "Connection: keep-alive" \
                -w 'EffectiveUrl=%{url_effective}' \
                "$download_url")
        elif ((j % 2 == 0)); then
            printf "| Retrieving Head: attempt #$j"
            file_header=$(tor_curl_request --insecure --head -L -s "$download_url")
        elif ((j % 3 == 0)); then
            printf "| Retrieving Head (hack): attempt #$j"
            rm -f "${WorkDir}/.temp/directhead"
            file_header=$(tor_curl_request --insecure --head -H "Connection: keep-alive" -L -s -i "$download_url" | 
                tee "${WorkDir}/.temp/directhead" &
                sleep 6
                [ -s "${WorkDir}/.temp/directhead" ]
                kill $! 2>/dev/null
            )
            if [[ ! -f "${WorkDir}/.flocks/${remote_url//[^a-zA-Z0-9]/}" ]]; then
                touch "${WorkDir}/.flocks/${remote_url//[^a-zA-Z0-9]/}"
            fi
            rm -f "${WorkDir}/.temp/directhead"
        else
            printf "| Retrieving Head: attempt #$j"
            file_header=$(tor_curl_request_extended --insecure --head -L -s "$download_url")
        fi
        if [[ "${DebugAllEnabled}" == "true" ]] ; then
            debugHtml "${remote_url##*/}" "isup_head$j" "download_url: ${download_url}"$'\n'"${file_header}"
        fi
        if [[ ! -z "$file_header" ]] ; then
            if grep -Eqi '404 Not Found|' <<< "${file_header}" ; then
                printf "\\n"
                echo -e "${RED}| Not Found (404). The file has been removed.${NC}"
                removedDownload "${remote_url}"
                exitDownloadNotAvailable=true
                return 1
            fi
            if ! grep -Eqi 'HTTP/.*200|HTTP/.*302' <<< "${file_header}" ; then
                hResponse=$(grep -oPi 'HTTP/.* \K.*$' <<< "${file_header}")
                if ((j>=$maxretries)); then
                    printf "\\n"
                    echo -e "${RED}| Unexpected header response ($hResponse).${NC}"
                    return 1
                else
                    printf "\\n"
                    echo -e "${YELLOW}| Unexpected header response ($hResponse). Retrying...${NC}"
                    continue
                fi
            else
                 break            
            fi
            if [[ "$filename_override" == "" ]] ; then
                filename=${download_url##*/}
            fi
            if grep -Eqi 'Content-Length:' <<< "${file_header}" ; then
                file_size_bytes=$(grep -oPi '(?<=content-length: ).*?(?=$)' <<< "$file_header")
                file_size_bytes=${file_size_bytes//[$'\t\r\n']}
                break
            fi
        else
            if ((j>=$maxretries)); then
                printf "\\n"
                echo -e "${RED}| No response. Try again later.${NC}"
                failedRetryDownload "${remote_url}" "" ""
                exitDownloadNotAvailable=true
                return 1
            else
                continue
            fi
        fi
    done
    printf "\\n"
    touch "${WorkDir}/.flocks/${remote_url//[^a-zA-Z0-9]/}"
	if [[ ! "$filename_override" == "" ]] ; then
		filename="$filename_override"
	fi
    filename=$(sanitize_file_or_folder_name "${filename}")
    if [[ -z "$filename" ]]; then
        printf "\\n"
        echo -e "${RED}| Unexpected or no header response.${NC}"
        return 1
    fi
    if [[ -z $file_size_bytes ]] ; then
        file_size_readable="${RED}Unknown filesize…${NC}"
    else
        file_size_readable="$(numfmt --to=iec --from=auto --format "%.2f" <<< "$file_size_bytes")"
    fi
    echo -e "${YELLOW}| File size:${NC}\t${file_size_readable}"
    file_path="${download_inflight_path}${filename}"
    echo -e "${YELLOW}| File name:${NC}\t\"${filename}\""
	flockDownload="${WorkDir}/.flocks/${filename//[^a-zA-Z0-9\.\_\-]/}.flock"
    if CheckDownloadExists "$remote_url" "$MoveToFolder" "$filecnt" "$filename" "$file_path" "$completed_location" ; then
        return 1
    fi
	echo "${remote_url//[^a-zA-Z0-9]/}" > $flockDownload
}
#!
#! ----------- (3) Fetch File / Download File Function --------------- #
#!
isup_GetFile() {
    echo -e "${GREEN}# Downloading…\t${BLUE}(No Resume)${NC}"
    echo -e "${YELLOW}| File path:${NC}\t./.inflight/${filename}\n"
    fileCnt=$1
    retryCnt=$2
    finalAttempt=$3
	flockDownload="${WorkDir}/.flocks/${filename//[^a-zA-Z0-9\.\_\-]/}.flock"
    for ((j=1; j<=$MaxDownloadRetries; j++)); do
        pd_presize=0
        if [[ -f "$file_path" ]] ; then
            pd_presize=$(stat --format="%s" "$file_path" | tr -d '[:space:]')
        fi
        GetRandomUA
        if [[ -z $file_size_bytes ]] ; then
            echo -e "${BLUE}| No Resume Fetch${NC} (unknown filesize)"
            CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
            trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; rm -f $flockDownload; echo ""; tput cnorm; exit" 0 1 2 3 6 15
            tor_curl_request_extended --insecure -L "$download_url" --output "$file_path"
            rc=$?
            if ((rc != 0 )) ; then
                printf "${RED}Download Failed (bad exit status).${NC}"
                if [[ -f ${file_path} ]]; then
                    printf "${YELLOW} Partial removed...${NC}"
                    printf "\n\n"
                    rm -f "${file_path}"
                else
                    printf "\n\n"
                fi
                if  ((j >= $MaxDownloadRetries)) ; then
                    rm -f "$flockDownload";
                    if [[ "${finalAttempt}" == "true" ]] ; then
                		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                	fi
                    return 1
                else
                    continue
                fi
            fi
			received_file_size=0
            if [[ -f "$file_path" ]] ; then
                received_file_size=$(stat --format="%s" "$file_path" | tr -d '[:space:]')
            fi
            if CheckNoHtml "$remote_url" "$filename" "$file_path" "$((received_file_size - pd_presize))" ; then
                containsHtml=false
            else
                containsHtml=true
            fi
            if [[ "$containsHtml" == "true" ]]; then
                echo -e "${YELLOW}Download Failed (contains html)${NC} partial removed..."
                rm -f "${file_path}"
                if  ((j >= $MaxDownloadRetries)) ; then
                    rm -f "$flockDownload";
                    if [[ "${finalAttempt}" == "true" ]] ; then
                		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                	fi
                    return 1
                else
                    continue
                fi
            fi
            break
        else
            CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
            trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; rm -f $flockDownload; echo ""; tput cnorm; exit" 0 1 2 3 6 15
            if [[ "${RateMonitorEnabled}" == "true" ]]; then
                tor_curl_request_extended --insecure -L --speed-limit $DownloadSpeedMin --speed-time $DownloadTimeoutInterval "$download_url" --continue-at - --output "$file_path"
            else
                tor_curl_request_extended --insecure -L "$download_url" --continue-at - --output "$file_path"
            fi
            received_file_size=0
            if [[ -f "$file_path" ]] ; then
                received_file_size=$(stat --format="%s" "$file_path" | tr -d '[:space:]')
            fi
            if CheckNoHtml "$remote_url" "$filename" "$file_path" "$((received_file_size - pd_presize))" ; then
                containsHtml=false
            else
                containsHtml=true
            fi
            downDelta=$(( received_file_size - pd_presize ))
            if [[ "${received_file_size}" -ne "${file_size_bytes}" ]] || [[ "$containsHtml" == "true" ]]; then	        
                if [[ "${AutoRepairBadPartials}" == "true" ]] && (( downDelta > 0 && downDelta < 1024 )) ; then
                    if [[ -f "${file_path}" ]] ; then
                        if ((pd_presize > 0)); then
                            echo -e "${YELLOW}Bad node / HTML found:${NC} reverting to previous file..."
                            truncateDownload "$remote_url" "$filename" "$pd_presize" "$received_file_size"
                            truncate -s $pd_presize "${file_path}"
                        else
                            echo -e "${YELLOW}Bad node / HTML found:${NC} tainted partial removed..."
                            rm -f "${file_path}"
                        fi
                    fi
                    if  ((j >= $MaxDownloadRetries)) ; then
                        rm -f "$flockDownload";
                        if [[ "${finalAttempt}" == "true" ]] ; then
                    		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                    	fi
                        return 1
                    else
                        continue
                    fi
                elif [[ "${AutoRepairBadPartials}" == "true" ]] && [[ "$containsHtml" == "true" ]] ; then
                    if [[ -f "${file_path}" ]] ; then
                        if ((pd_presize > 0)); then
                            echo -e "${YELLOW}Bad node / HTML found:${NC} reverting to previous file..."
                            truncateDownload "$remote_url" "$filename" "$pd_presize" "$received_file_size"
                            truncate -s $pd_presize "${file_path}"
                        else
                            echo -e "${YELLOW}Bad node / HTML found:${NC} tainted partial removed..."
                            rm -f "${file_path}"
                        fi
                    fi
                    if  ((j >= $MaxDownloadRetries)) ; then
                        rm -f "$flockDownload";
                        if [[ "${finalAttempt}" == "true" ]] ; then
                    		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                    	fi
                        return 1
                    else
                        continue
                    fi
                elif (( downDelta > 0 && downDelta < 1024 )) || [[ "$containsHtml" == "true" ]] ; then
                    if [[ -f "$file_path" ]] ; then
                        rm -rf "$file_path"
                    fi
                    echo -e "\n${YELLOW}Bad node / HTML found:${NC} tainted partial removed..."
                    if  ((j >= $MaxDownloadRetries)) ; then
                        rm -f "$flockDownload";
                        if [[ "${finalAttempt}" == "true" ]] ; then
                    		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                    	fi
                        return 1
                    else
                        continue
                    fi
                fi
                if [[ "${received_file_size}" -ne "${file_size_bytes}" ]]; then
                    echo -e "\n${RED}Download failed, file is incomplete.${NC}"
                    if  ((j >= $MaxDownloadRetries)) ; then
                        rm -f "$flockDownload";
                        if [[ "${finalAttempt}" == "true" ]] ; then
                    		droppedSizeBadDownload "${remote_url}" "${filename}" "${received_file_size}"
                    	fi
                        return 1
                    else
                        continue
                    fi
                fi
	        else
	            break
            fi
        fi            
    done
    rm -f "$flockDownload";
    ProcessCompletedDownload "$remote_url" "$MoveToFolder" "$filecnt" "$filename" "$file_size_bytes" "$completed_location" "$file_path"
	return 0
}
#!
#! --------------- Host Extra Functions ------------------- #
#!