#!    Name: biteblob.sh
#!  Author: kittykat
#! Version: 2024.09.13
#!    Desc: Add support for downloading and processing of urls for a new host
#!   Usage: Copy this file into the ./${ScriptDir}/hosts/ folder
#!
#!
#! ------------ REQUIRED SECTION ---------------
#! @[UPDATE] HostAndDomainRegexes: This string is loaded into mad.sh and allows dynamic handling of new url data
#! Format: '/HostCode/HostNick/HostFuncPrefix:HostDomainRegex@'
#! HostCode: <aUniqueCodeForHost> (ie. 'fh' for filehaus -- cannot be used by other hosts)
#! HostNick: What is displayed throughout MAD output (ie. 'filehaus' -- "urls.txt has 10 filehaus.."  will be displayed)
#! HostFuncPrefix: <aUniqueStringThatMustPrefixHostFunctions> (ie. 'fh' -- fh_DownloadFile(), fh_FetchFileInfo() .. )
#!   * Note: Must begin with a letter a-z (functions beginning with numbers are no bueno)
#! HostDomainRegex: The regex used to verify matching urls
HostCode='bite'
HostNick='biteblob'
HostFuncPrefix='bite'
HostUrls='biteblob.com'
HostDomainRegex='^(http|https)://(.*\.)?biteblob\.(com|org)'
#!
#! !! DO NOT UPDATE OR REMOVE !!
#! This merges the Required HostAndDomainRegexes into mad.sh
ListHostAndDomainRegexes=${ListHostAndDomainRegexes}'/'${HostCode}'/'${HostNick}'/'${HostFuncPrefix}'/'${HostUrls}':'${HostDomainRegex}'@'
#!
#!
#! ------------ (1) Host Main Download Function --------------- #
#!
#! @REQUIRED: Host Main Download function
#! Must be named specifically as such:
#! <HostFuncPrefix>_DownloadFile()
bite_DownloadFile() {
	local remote_url=${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 bite_FetchFileInfo $finalAttempt && bite_GetFile "${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 ----------------- #
#!
bite_FetchFileInfo() {
    finalAttempt=$1
    maxfetchretries=5
    fixed_url=${remote_url}
    if grep -Eqi "biteblob.org" <<< "$fixed_url"; then
        fixed_url=${remote_url/biteblob.org/biteblob.com}
    fi
    if grep -Eqi "biteblob.com/Download/" <<< "$fixed_url"; then
        fixed_url=${remote_url/biteblob.com\/Download/biteblob.com\/Information}
    fi
    download_url=${fixed_url/Information/Download}
    echo -e "${GREEN}# Fetching download link…${NC}"
    for ((j=1; j<=$maxfetchretries; j++)); do
        mkdir -p "${WorkDir}/.temp"
        printf " ."
        tor_identity="${RANDOM}"
        CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
        trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; echo ""; tput cnorm; exit" 0 1 2 3 6 15
        response=$(tor_curl_request --insecure -L -s "${fixed_url}")
        if [[ "${DebugAllEnabled}" == "true" ]] ; then
            debugHtml "${remote_url##*/}" "bite_dwnpage$j" "url: $fixed_url"$'\n'"${response}"
        fi
	    if [[ -z $response ]] ; then
	        if [[ $j == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract download link${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                continue
            fi
	    fi
        if grep -Eqi 'Not Found|Invalid Request|Link Unauthorized|No download available|file was removed|file has been deleted' <<< "$response"; then
            printf "\\n"
            echo -e "${RED}| The file was not found. It could be deleted or expired.${NC}"
            exitDownloadError=true
            removedDownload "${remote_url}"
            return 1
        fi
        if grep -Eqi '<button id="downloadButton"' <<< "$response"; then
            printf "\\n"
            echo -e "${GREEN}| Download link found${NC}"
            if ! grep -Eqi 'https://biteblob.com/Download/' <<< $download_url ; then
                download_loc=$(grep -oP '(?<=onclick="location.href='"'"').*(?='"'"')' <<< "$response")
                download_url="https://biteblob.com${download_loc}"
            fi
            break
        fi
        if [[ $j == $maxfetchretries ]] ; then
            printf "\\n"
            echo -e "${RED}| Failed to extract download info (unknown).${NC}"
            warnAndRetryUnknownError=true
            if [[ "${finalAttempt}" == "true" ]] ; then
        		failedRetryDownload "${remote_url}" "" ""
        	fi
            return 1
        fi
    done
    echo -e "${GREEN}# Fetching file info…${NC}"
    for ((j=1; j<=$maxfetchretries; j++)); do
        printf " ."
        CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
        trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; echo ""; tput cnorm; exit" 0 1 2 3 6 15
        file_header=$(tor_curl_request --insecure --head -L -s "$download_url")
        if [[ "${DebugAllEnabled}" == "true" ]] ; then
            debugHtml "${remote_url##*/}" "bite_head$j" "download_url: ${download_url}"$'\n'"${file_header}"
        fi
		if [[ -z $file_header ]] ; then
		    if [[ $j == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract file info.${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                continue
            fi
		fi
        if ! grep -Eqi 'HTTP/2 200|HTTP/1.1 200|200 OK' <<< $file_header ; then
		    if [[ $j == $maxfetchretries ]] ; then
                printf "\\n"
                echo -e "${RED}| Failed to extract file info${NC}"
                warnAndRetryUnknownError=true
                if [[ "${finalAttempt}" == "true" ]] ; then
            		failedRetryDownload "${remote_url}" "" ""
            	fi
                return 1
            else
                continue
            fi
		fi
        if [[ "$filename_override" == "" ]] ; then
            if grep -Eqi 'filename=' <<< "${file_header}" ; then
                filename=$(grep -oP 'filename=\K.*$' <<< "${file_header}")
                filename=${filename##filename}
                filename=${filename//\"/}
                filename=${filename//[$'\t\r\n']}
                filename=$(trim_string "${filename}")
            fi
        fi
        file_size_bytes=$(grep -oPi '(?<=content-length: ).*' <<< "$file_header")
        file_size_bytes=${file_size_bytes//[$'\t\r\n']}
        printf "\\n"
        break #Good to go here
    done
    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 $file_size_bytes ]] ; then
        file_size_readable="${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]/}" > $flockDownload
}
#!
#! ----------- (3) Fetch File / Download File Function --------------- #
#!
bite_GetFile() {
    echo -e "${GREEN}# Downloading…"
    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
        if [[ -z $file_size_bytes ]] ; then
            echo -e "${BLUE}| No Resume Fetch${NC} (unknown filesize)"
            tor_identity="${RANDOM}"
            CLEANSTRING=${remote_url//[^a-zA-Z0-9]/}
            trap "rm -f ${WorkDir}/.flocks/${CLEANSTRING}; rm -f $flockDownload; echo ""; tput cnorm; exit" 0 1 2 3 6 15
            tor_curl_request --insecure --referer "$file_url" "$download_url" --output "$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
                if grep -Eqi 'was removed|no such file|was deleted|not found|banned' < "$file_path" ; then
                    printf "\\n"
                    echo -e "${RED}| The file was not found or has been removed.${NC}"
                    rm -f "${file_path}"
                    rm -f "$flockDownload";
                    removedDownload "${remote_url}" "The file was not found or has been removed."
                    exitDownloadNotAvailable=true
                    return 1
                fi
                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 --insecure --speed-limit $DownloadSpeedMin --speed-time $DownloadTimeoutInterval "$download_url" --continue-at - --output "$file_path"
            else
                tor_curl_request --insecure --referer "$file_url" "$download_url" --continue-at - --output "$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 ------------------- #
#!