path: root/hack_of_all_hacks

#! /bin/bash

# This function reads tags of xml in the same way read normally reads lines.
function rdom
{
    local IFS=\>
    read -d \< element content
}

function tell_fact # thing channel
{
    thing="${1}"
    declare -l lower_case_thing="${thing}"
    channel="${2}"

    if [[ -s "info/${lower_case_thing}" ]]
    then
        # For the first entry we will say like: `thing is: '
        first="${thing} is: "

        uniq "info/${lower_case_thing}" |
        while read line
        do
            send_msg "${channel}" "${first}${line}"
            first=''
        done

        return
    else
        return 1
    fi
}

source common_codez

function remember_fact
{
    if grep "^${is}$" "info/${thing}" &>/dev/null
    then
        send_msg "${channel_it_came_from}" "${personoslash}: I know."
    else
        echo "${is}" >> "info/${thing}"
        send_msg "${channel_it_came_from}" "${personoslash}: Remembered."
    fi
}

function forget_fact
{
    number_of_matching_lines=$(grep -c "^${isnt}" "info/${thing}")

    case "${number_of_matching_lines}" in
        0 )
            send_msg "${channel_it_came_from}" "${personoslash}: I know."
            ;;
        1 )
            grep -v "^${isnt}" "info/${thing}" | sponge "info/${thing}"
            send_msg "${channel_it_came_from}" "${personoslash}: OK, entry removed."
            ;;
        * )
            send_msg "${channel_it_came_from}" "${personoslash}: Ambiguos."
            ;;
    esac
}

function l33t_codes
{
    my_own_name='pbot'

    person="${sender%%!*}"

    # Remove any forward slashes.
    personoslash="${person//\/}"
    declare -l personoslashlower="${personoslash}"

    channel_it_came_from="$( echo ${line} | cut -d ' ' -f 3 )"

    # If it's a private message
    [[ "${channel_it_came_from}" == "${my_own_name}" ]] && channel_it_came_from="${personoslash}"

    ######################
    # Echo injected data #
    ######################

    # Should send a message like: echo 'This is the message' > /tmp/un-provoked-message-store

    injected_data=0

    line_filtered=${line##*PRIVMSG +([![:space:]]) :}

    if [[ ${personoslash} == tlCJ99mfZl ]]
    then
	send_msg "${channel_it_came_from}" "${line_filtered}"
	injected_data=1
    else
	###############################################################
	# This is a message from a user. Make preperations to process #
	###############################################################

	the_time_now=$(date +%s)

        # Make this person a folder if they don't already have one.
	if ! [[ -d "announcements/people/${personoslashlower}" ]]
	then
	    mkdir -p "announcements/people/${personoslashlower}"
	fi

        # Record that the person has been seen, and when.
	touch "announcements/people/${personoslashlower}/seen"

        shopt -s extglob

        # We want to get only the message part of the line
        sentence="${line#* }"
        sentence="${sentence#* }"
        sentence="${sentence#* :}"
	
        ##########################
        # Shared libraries error #
        ##########################

	the_time_now=$(date +%s)

        # If someone complains about error while loading shared libraries error
        # then recomend them to the bug tracker.
	if [[ ${sentence} == *"error while loading shared libraries"* ]]
	then
            # Make sure they have not already been recommended to the bug
	    # tracker less than one day ago.
	    sharlibsrecfile="announcements/people/${personoslashlower}/shared_libs"

	    # Have we recommended them to the bug tracker before?
	    if [[ -f ${sharlibsrecfile} ]]
	    then
		# Was it less than a day ago?
		(( ( $( stat -c %Y ${sharlibsrecfile} ) + 86400 ) > the_time_now )) && rec_recent=1 || rec_recent=0
	    else
		rec_recent=0
	    fi

	    if ! (( rec_recent ))
	    then
		send_msg "${channel_it_came_from}" "${person}: please report a bug, specifying the exact error message, package of the failing command and architecture: http://labs.parabola.nu"
		touch "${sharlibsrecfile}"
	    fi
	fi

        ##########
        # Repeat #
        ##########

	[[ ${sentence} != ${i_repeated} ]] && say_again=yesyes

        # If two different people say the same thing in a row then say it again
        # for fun.
	if [[ ${sentence} == ${lastline} ]] && [[ ${person} != ${lastsender} ]] && [[ ${say_again} != nono ]] && [[ ${sentence} != "${my_own_name}: "* ]] # If two different people say the same thing to me in quick sucession I shouldn't repeat them.
	then
	    send_msg "${channel_it_came_from}" "${sentence}"
	    i_repeated="${sentence}"
	    say_again=nono
	fi

	lastline="${sentence}"
	lastsender="${person}"

        #################
        # Announcements #
        #################

        # If someone has sent this person a message then echo it to
        # them.
        if [[ -f "announcements/people/${personoslashlower}/messages" ]]
        then
            uniq "announcements/people/${personoslashlower}/messages" |
            while read line
            do
                # The first field is the time, in *nix seconds, that
                # the message was sent. The second is the name of the
                # sender. And the rest is the message.
                intermediate="${line#* }"
                sender_u="${intermediate%% *}"
                message_u="${intermediate#* }"
                time_sent="${line%% *}"
                
                seconds_ago_seen="$(( the_time_now - time_sent ))"
		minutes_ago_seen="$(( ( the_time_now - time_sent ) / 60 ))"
		hours_ago_seen="$(( ( the_time_now - time_sent ) / 3600 ))"
		days_ago_seen="$(( ( the_time_now - time_sent ) / 86400 ))"
		months_ago_seen="$(( ( the_time_now - time_sent ) / 2592000 ))"
		years_ago_seen="$(( ( the_time_now - time_sent ) / 31104000 ))"
		if (( seconds_ago_seen < 120 ))
		then
		    units="${seconds_ago_seen} seconds"
		elif (( minutes_ago_seen < 120 ))
		then
		    units="${minutes_ago_seen} minutes"
		elif (( hours_ago_seen < 48 ))
		then
		    units="${hours_ago_seen} hours"
		elif (( days_ago_seen < 60 ))
		then
		    units="${days_ago_seen} days"
		elif (( months_ago_seen < 24 ))
		then
		    units="${months_ago_seen} months"
		else
		    units="${years_ago_seen} years"
		fi

                send_msg "${channel_it_came_from}" "${personoslash}: ${sender_u} told me to tell you, (${units} ago): ${message_u}"
            done
            rm "announcements/people/${personoslashlower}/messages"
        fi
	
        #####################
        # Page title getter #
        #####################

        # We don't want to get the page title if it's injected data.
	if [[ ${line} =~ http://[^\ ]+ ]] || [[ ${line} =~ https://[^\ ]+ ]] &&
	    (( ! injected_data ))
	then
	    url_to_get="${BASH_REMATCH}"
	    
            the_title=$(
                curl -L --compressed "${url_to_get}" 2> /dev/null |
                while rdom
                do
                    if [[ ${element} = title ]] || [[ ${element} = TITLE ]]
                    then
                        sed 's/  / /g' <<< "${content}" | replace_wierd_html_chars
                    fi
                done
            )
		
            if ! [[ -z ${the_title} ]]
	    then
	        send_msg "${channel_it_came_from}" "Page title: \`${the_title}'"
	    fi
	fi

        case "${sentence}" in
            ########
            # Seen #
            ########

	    "${my_own_name}: when did you last see"* )
	        subject="${sentence##${my_own_name}: when did you last see }"
	        subject="${subject##${my_own_name}: when did you last see: }" # If there's an `:', we can still handle it.
	        subject="${subject%\?}"
	        subject="${subject%% *}"
                declare -l subjectlower="${subject}"

                if [[ "${subject}" == ${my_own_name} ]]
                then
                    send_msg "${channel_it_came_from}" "I last saw ${subject} speak 0 seconds ago."
	        elif [[ -f "announcements/people/${subjectlower}/seen" ]]
	        then
		    seconds_ago_seen="$(( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ))"
		    minutes_ago_seen="$(( ( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ) / 60 ))"
		    hours_ago_seen="$(( ( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ) / 3600 ))"
		    days_ago_seen="$(( ( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ) / 86400 ))"
		    months_ago_seen="$(( ( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ) / 2592000 ))"
		    years_ago_seen="$(( ( the_time_now - $( stat -c %Y announcements/people/${subjectlower}/seen ) ) / 31104000 ))"
		    if (( seconds_ago_seen < 120 ))
		    then
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${seconds_ago_seen} seconds ago."
		    elif (( minutes_ago_seen < 120 ))
		    then
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${minutes_ago_seen} minutes ago."
		    elif (( hours_ago_seen < 48 ))
		    then
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${hours_ago_seen} hours ago."
		    elif (( days_ago_seen < 60 ))
		    then
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${days_ago_seen} days ago."
		    elif (( months_ago_seen < 24 ))
		    then
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${months_ago_seen} months ago."
		    else
		        send_msg "${channel_it_came_from}" "I last saw ${subject} speak ${years_ago_seen} years ago."
		    fi
	        else
		    send_msg "${channel_it_came_from}" "I never saw ${subject} speak."
	        fi
                ;;
	    ########
	    # tell #
	    ########

	    "${my_own_name}: tell "+([![:space:]])": "+([![:space:]])* )
                # The line will be something such as:
                # pbot: tell fauno: you suck
                process="${sentence##${my_own_name}: tell }"
	        subject="${process%%:*}"
                message="${process#*:}"
                message="${message# }"

                if [[ "${subject}" == "${my_own_name}" ]]
                then
                    send_msg "${channel_it_came_from}" "${my_own_name}: ${personoslash} told me to tell you, (0 seconds ago): ${message}"
                else
                    declare -l subjectlower="${subject}"
                    
                    [[ -d "announcements/people/${subjectlower}" ]] || mkdir -p "announcements/people/${subjectlower}"
                    # The time in *nix seconds is saved there so that
                    # pbot can say how long ago the massage was sent
                    # when he gives it to it's recipient.
                    echo "$(date +%s) ${personoslash} ${message}" >> "announcements/people/${subjectlower}/messages"

                    response='certainly'

                    send_msg "${channel_it_came_from}" "${personoslash}: ${response}"

                    if ! [[ -f "announcements/people/${subjectlower}/seen" ]]
                    then
                        send_msg "${channel_it_came_from}" "${personoslash}: WARNING: I HAVE NEVER SEEN \"${subject}\" HERE BEFORE. CHECK YOUR SPELLING."
                    fi
                fi
                ;;
            ############
	    # factoids #
            ############

            "${my_own_name}: "+([!/])" is "+([![:space:]])* )
                declare -l thing="${sentence#${my_own_name}: }"
                thing="${thing%% is *}"
                is="${sentence#* is }"

                remember_fact
                ;;
            "${my_own_name}: "+([!/])" is: "+([![:space:]])* )
                declare -l thing="${sentence#${my_own_name}: }"
                thing="${thing%% is: *}"
                is="${sentence#* is: }"

		remember_fact
                ;;
            "${my_own_name}: "+([![:space:]])" isn't "+([![:space:]])* )
                declare -l thing="${sentence#${my_own_name}: }"
                thing="${thing%% isn\'t *}"
                isnt="${sentence#* isn\'t }"

		forget_fact
                ;;
            "${my_own_name}: "+([![:space:]])" isn't: "+([![:space:]])* )
                declare -l thing="${sentence#${my_own_name}: }"
                thing="${thing%% isn\'t: *}"
                isnt="${sentence#* isn\'t: }"

                forget_fact
                ;;
            ','+([!/]) )
                thing="${sentence#,}"

                tell_fact "${thing}" "${channel_it_came_from}"
                ;;
	    #############
            # Footnotes #
	    #############
			
            *\[[[:digit:]]\]* )
                declare -a fn

                while read -d $'\0' file
                do
                    #if match = grep "${file##*/}[ ]\?\[[[:digit:]]\]" <<< "${sentence}"
                    filename="${file##*/}"

                    declare -l lowersentence="${sentence}"

                    if [[ " ${lowersentence}" =~ [^[:alnum:]]${filename}[\ ]?\[[[:digit:]]\] ]]
                    then
                        index="${BASH_REMATCH: -2:1}"

                        fn[${index}]=$(head -1 "${file}")
                    fi
                done < <(find info -print0)

                for (( n=0 ; n<50 ; n++ ))
                do
                    str="${fn[${n}]}"

                    [[ -z "${str}" ]] && continue
                    
                    send_msg "${channel_it_came_from}" "[${n}] ${str}"
                done
                ;;
	    ########################
	    # unrecognised command #
	    ########################

	    ${my_own_name}:* | ','* )
                while read line
                do
                    send_msg "${personoslash}" "${line}"
                done <<< cat << EOF
Command not recognised. Example commands:
${my_own_name}: tell Jack: hi Jack
${my_own_name}: when did you last see Jill?
${my_own_name}: lemon is yummy
${my_own_name}: lemon isn't yummy
,lemon
,tell jack about foo
EOF
                ;;
	esac

# ' this comment fixes a bug in emacs shell-script-mode that messes up the syntax highlighting

        ###########################
        # answer nicks over query #
        ###########################

        if [[ "${line}" =~ ,tell\ [^\ ]+\ about\ [^\ ]+ ]]
        then
            gotit="${BASH_REMATCH}" # will be like: `,tell jack about blah'

            dudep1="${gotit#,tell }"
            dude="${dudep1%% *}"
            thing="${gotit##* }"

            if [[ -n "${dude}" ]] && [[ -n "${thing}" ]]
            then
                tell_fact "${thing}" "${dude}" || send_msg "${channel_it_came_from}" "${personoslash}: Error, failed to tell ${dude} about ${thing}"
            fi
        fi

        # TODO: add a birthday announcement feature, cointoss feature, timer
        # feature.

        #########
        # Tests #
        #########

        #echo "${line}"
    fi
}