path: root/localkannel-dispatch

#!/bin/sh

set -e

vardir=/var/lib/kannel/hello
sbindir=/usr/local/sbin

exit0() {
    [ -n "$1" ] && echo "$1"
    exit 0
}
exit1() {
    response="${1:+Error: }${1:-Internal error!}"
# FIXME: pass error messages via stderr (not stdout)
#   echo >&2 "$response"
    echo "$response"
    [ -z "$SMS_SMSC$SMS_URL" ] || $sbindir/localsendsms "$to" "$response"
    exit 1
}

grepescape() {
    echo "$1" | perl -pe 's/(?=[+])/\\/g'
}

# Based on Text::Unidecode bug#8017: http://rt.cpan.org/Ticket/Display.html?id=8017#txn-322351
lctransliterate() {
    echo "$1" | perl -n \
        -e 'use Text::Unidecode;' \
        -e 'use Encode 2.12 qw(encode decode _utf8_off);' \
        -e 'print lc(encode("UTF-8", decode("GSM0338", encode("GSM0338", decode("UTF-8", $_),' \
            -e 'sub {$a=unidecode(chr $_[0]); _utf8_off($a); $a;}' \
        -e '))));'

    return $res;
}

uriunescape() {
    if [ 0 = "$urldecode" ]; then
        echo "$@"
    else
        echo "$@" | perl -e 'use URI::Escape; print lc(uri_unescape(<STDIN>));'
    fi
}

# Resolve var from "variable = value" pair in file below /etc/local
getfilevar() {
    file="/etc/local/$1"
    var="$2"
    grep -m1 "^$var" "$file" | awk -F '(= )' '{print $2}'
}

lastservicephone() {
    logfile=/var/log/kannel/smsbox.log
    tac $logfile $logfile.1 \
        | perl -ne "/INFO: Starting to service <.*> from <$1> to <([^<>]*)>/ and print \$1 and exit 0"
}

#from=`uriunescape "$1" | sed -e 's/\+/ /g'`; shift
from=`uriunescape "$1"`; shift
#to=`uriunescape "$1" | sed -e 's/\+/ /g'`; shift
to=`uriunescape "$1"`; shift
# FIXME: avoid stripping ALL plusses
set -- `uriunescape "$@" | sed -e 's/\+/ /g'`
#set -- `uriunescape "$@"`
app_raw="$1"
app=`lctransliterate "$1"`; shift

export debug

SMS_PHONE="$from"
urldecode=0
export SMS_PHONE urldecode

case "$SMS_REALM" in
  test)
    provider="dummy"
    mdpath="/home/hearth/public_webdata/hearth/content/sms"
    export mdpath
    ;;
  hello)
    provider="local"
#   provider="coolsms"
#   provider="clickatell"
    mdpath="/home/hearth/public_webdata/hearth/content/sms"
    export mdpath
    ;;
  hellobudapest)
    provider="clickatell"
    addtestphones="+36307418279" # Jonas
    addphones=""
    gotestphones="+36307418279" # Jonas
    gophones=""
    SMS_ERRFROM="+36307418279" # Jonas
    SMS_ERRTO1="+36307418279" # Jonas
#   SMS_ERRTO2="+36307418241" # Emma
#   SMS_ERRTO2="+36703782127" # Emma
    mdpath="/home/www-hearth/public_webdata/hellobudapest/content/sms"
    export SMS_ERRFROM SMS_ERRTO1 SMS_ERRTO2 mdpath
    ;;
  hellotorino)
    provider="clickatell"
    gotestphones="+393453915741 +393453805531 +393453801457" # Jonas, Jacob, Vera
    gophones="+393407574815 +393407574813 +393381467977 +393478617029" # Alessandra, Vela, Marco, Silvia
    SMS_ERRFROM="+393453915741" # Jonas
    SMS_ERRTO1="+393453801457" # Vera
    SMS_ERRTO2="+393483281187" # Rescue
    mdpath="/home/www-hearth/public_webdata/hellotorino/content/sms"
    export SMS_ERRFROM SMS_ERRTO1 SMS_ERRTO2 mdpath
    ;;
  cyber)
    provider="local"
    mdpath="/home/cyberhus/public_webdata/mdsms/content/sms"
    export mdpath
    ;;
  *)
    exit1 "unknown realm \"$SMS_REALM\"!"
    ;;
esac
case "$provider" in
  dummy)
    dummy=1
    ADMIN_OK=1
    export ADMIN_OK dummy
    ;;
  local)
    export SMS_SMSC
    ;;
  coolsms)
    unset SMS_SMSC
    SMS_URL="https://sms.coolsmsc.dk:8081/"
    SMS_USER=$(getfilevar coolsms user)
    SMS_PW=$(getfilevar coolsms pw)
    SMS_CP="cp1252"
    SMS_MSGTAG="message"
    export SMS_URL SMS_USER SMS_PW SMS_CP SMS_MSGTAG
    ;;
  # supports concatenation and req_feat (e.g 48: sender ID)
  # does not support DLR, and only concatenates max. 3 smses
  clickatell)
    unset SMS_SMSC
    SMS_URL="https://api.clickatell.com/http/sendmsg"
    SMS_USER=$(getfilevar clickatell user)
    SMS_PW=$(getfilevar clickatell pw)
    SMS_CP="iso8859-1"
    SMS_USERTAG="user"
    SMS_API=$(getfilevar clickatell api)
    SMS_CALLBACK="3"
    SMS_CONCAT="3"
    SMS_ESCALATE="1"
    SMS_VALIDITY="1"
    SMS_REQ_FEAT="24611" # 1+2+32+8192+16384 = text+8bit+numeric_src+dlr+concat
    stripprefix="1"
    export SMS_URL SMS_USER SMS_PW SMS_CP SMS_USERTAG SMS_API SMS_CALLBACK SMS_CONCAT SMS_ESCALATE SMS_VALIDITY SMS_REQ_FEAT stripprefix
    ;;
  # supports DLR
  # Kannel clickatell profile supports concatenation but not req_feat
  # Kannel generic profile supports req_feat but not concatenation
  clickatell_via_kannel)
    SMS_SMSC="X"
    SMS_CONCATENATION="1"
    SMS_DLR_MASK="7"
    SMS_DLR_URL="http://helloearth.jones.dk/test.cgi?type=dlr&msgid=XXX&smsid=%I&from=%p&to=%P&time=%t&unixtime=%T&dlr=%d&dlrmsg=%A"
    SMS_CP="iso8859-1"
    SMS_VALIDITY="1"
    SMS_BINFO="req_feat=24611&concat=3&escalate=1%validity=1" # 1+2+32+8192+16384 = text+8bit+numeric_src+dlr+concat
    stripprefix="1"
    export SMS_SMSC SMS_CONCATENATION SMS_DLR_MASK SMS_DLR_URL SMS_CP SMS_VALIDITY SMS_BINFO stripprefix
    ;;
  routo_via_kannel)
    SMS_SMSC="Y"
    export SMS_SMSC
    ;;
  *)
    exit1 "unknown provider \"$provider\"!"
    ;;
esac

# FIXME: some safety net against abusing this imposter feature
#if [ -n "$REDIRECT_OK" ]; then
case "$app" in
  @*)
# FIXME: Avoid hardcoding national prefix
    targetphone="$(echo "$app" | perl -pe 's/^@//;' -e 's/^([^+])/+36\1/')"
# TODO: silence errors - or better: bounce those back to original sender
    targetfrom=$(lastservicephone "$targetphone")
    [ -n "$targetfrom" ] || exit1 "refusing to redirect: unknown target phone number \"$targetphone\"."
    SMS_PHONE="$targetfrom" $sbindir/localmarkdown2sms "$targetphone" "$@"
    exit 0
    ;;
esac
#fi

if [ -n "$GROUP_OK" ]; then
case "$app" in
  !*)
    group="$(echo "$app" | perl -pe 's/^!//;')"
    members=$(cd "$vardir/user" && grep -lF "$group" */group | perl -pe "s,/group$,,") || members=
    [ -n "$members" ] || exit1 "Message redirected for none: no members resolved in group \"$group\"!"
    for member in $members; do
        phone=$(head -n 1 "$vardir/user/$member/phone") || nophone="${nophone+$nophone }$member"
        [ -z "$phone" ] || $sbindir/localmarkdown2sms "$phone" "$@"
    done
    [ -n "$members" ] || exit1 "Message redirected for none: no members resolved in group \"$group\"!"
    membercount=$(echo "$members" | wc --word)
    [ -z "$nophone" ] || nophonecount=$(echo "$nophone" | wc --word)
    [ -z "$nophone" ] || exit1 "Message redirected for $membercount members of group \"$group\", but failed for $nophonecount of them (could not resolve phone number)!"
    exit0 "Message redirected for $membercount members of group \"$group\"."
    ;;
esac
fi

case "$app" in
  /*)
    cmd="$(echo "$app" | perl -pe 's/^\///;')"
    case "$cmd" in
      ping)
        if [ "help" = "$1" ]; then
            $sbindir/localsendsms "$to" "Usage:
/ping [...]

Respond \"pong\" and echo back any addition input."
            exit 0
        fi
        $sbindir/localsendsms "$to" pong "$@"
        exit 0
        ;;
      add|addtest)
        if [ "help" = "$1" ]; then
            $sbindir/localsendsms "$to" "Usage:
/add ID PHONE [MSG]...]

Register PHONE as ID,
and (if included) send MSG to subscribers."
            exit 0
        fi

        id="$(echo "$1" | perl -ne '/^(\d\d)$/ and print $1;')"
        [ -n "$id" ] || exit1 "wrong or missing id: must be 2 digits."
        shift

# FIXME: avoid juggling with leading plus here when no longer stripped from input
#          phone="$(echo "$1" | perl -ne 's/^(?=[^+])/+36/;' -e '/^(\+\d\d\d+)$/ and print $1;')"
        phone="$(echo "$1" | perl -ne '/^(\d\d\d+)$/ and print $1;')"
        [ -n "$phone" ] || exit1 "wrong or missing phone number: must be only digits with leading + and at least 3 digits."
        targetfrom=$(lastservicephone "\+$phone")
        [ -n "$targetfrom" ] || exit1 "unknown phone +$phone: it must have been used with the system recently."
        phone="+$phone"
        shift

        case "$cmd" in
          addtest)
            msgphones="$addtestphones"
            ;;
          add)
            msgphones="$addphones"
            ;;
        esac

        str=$($sbindir/localsmsadmin add user "$id" "$phone")
        $sbindir/localsendsms "$to" "[info] \"$cmd\": $str."

        if [ -n "$*" ]; then
            for msgphone in $msgphones; do
                $sbindir/localsendsms "$msgphone" "[info] $id $phone $@"
            done
            $sbindir/localsendsms "$to" "[info] $id $phone added/updated. trailing message forwarded to subscribers."
        else
            $sbindir/localsendsms "$to" "[info] $id $phone added/updated. (no trailing message passed to subscribers)."
        fi

        exit 0
        ;;
# FIXME: generalize this ugly hacks somehow, and secure against random use
      go|gotest|so|sotest)
        case "$cmd" in
          go*)
            basecmd="go"
            realcmd="hello"
            ;;
          so*)
            basecmd="so"
            realcmd="szia"
            ;;
        esac
        if [ "help" = "$1" ]; then
            $sbindir/localsendsms "$to" "Usage:
/$basecmd PHONE... [MSG...]
/${basecmd}test PHONE... [MSG...]
/$basecmd help

Start thread \"$realcmd\" on behalf of each PHONE,
and (if included) send MSG to subscribers."
            exit 0
        fi
        [ -n "$1" ] || exit1 "target phone number missing (try \"/$cmd help\" for usage)"
        case "$cmd" in
          gotest|sotest)
            phones="$gotestphones"
            ;;
          go|so)
            phones="$gophones"
            ;;
        esac
# FIXME: avoid juggling with leading plus here when no longer stripped from input
# FIXME: make country code optional again when plus no longer stripped from input
# FIXME: Avoid hardcoding national prefix
        while [ -n "$1" ]; do
#           targetphone="$(echo "$1" | perl -ne 's/^(?=[^+])/+36/;' -e '/^(\+\d\d\d+)$/ and print $1;')"
            targetphone="$(echo "$1" | perl -ne '/^(\d\d\d+)$/ and print $1;')"
            [ -n "$targetphone" ] || continue

            # Sanity check
            targetfrom=$(lastservicephone "\+$targetphone")
            [ -n "$targetfrom" ] || exit1 "refusing to redirect: unknown target phone number +$targetphone."

            targetphones="${targetphones:+$targetphones }\+$targetphone"
            shift
        done

        # send responses (threaded one last, to work in debug mode)
        if [ -n "$*" ]; then
            for phone in $phones; do
                $sbindir/localsendsms "$phone" "[$cmd] $@"
            done
            $sbindir/localsendsms "$to" "[info] \"$cmd\" thread started for $targetphones and trailing message forwarded to subscribers."
        else
            $sbindir/localsendsms "$to" "[info] \"$cmd\" thread started for $targetphones (no trailing message passed to subscribers)."
        fi
        for phone in $targetphones; do
            SMS_PHONE=$(lastservicephone "$phone") $sbindir/localmarkdown2sms "$phone" "$realcmd"
        done
        exit 0
        ;;
    esac
    candidates=$(cd "$vardir/user" && grep -lF "$to" */phone | perl -pe "s,/phone$,,") || candidates=
    [ -z "$candidates" ] || $(grep -vqF "$candidates" "$vardir/group/admin/user") || admin=true
    if [ -n "$ADMIN_OK" ] && [ -n "$admin" ]; then
        str="$($sbindir/localsmsadmin "$cmd" "$@" 2>&1)" || exit1 "$str"
        $sbindir/localsendsms "$to" $str
        exit 0
    elif [ "help" = "$cmd" ]; then
        $sbindir/localsendsms "$to" "Commands:
/ping [...]
/COMMAND help
/help

try e.g. \"/del help\"."
        exit 0
    fi
    ;;
esac

#FIXME: if sender has a mission, check for "done": process missionpending and report result to mission members

#  yb)
#   s="$(links -dump "http://www.yubnub.org/parser/parse?command=$@")"
#   $sbindir/localsendsms "$to" "$s"
#   exit 0
#   ;;

# Bail out if another thread already active targeted same user
if pgrep -f "$(grepescape "$to")"; then
    for errorto in $SMS_ERRTO1 $SMS_ERRTO2; do
        SMS_PHONE="$SMS_ERRFROM" $sbindir/localsendsms "$errorto" "[warning] silently suppressed \"$app_raw\" for $to busy already"
    done
    exit 0
fi

$sbindir/localmarkdown2sms "$to" "$app_raw" "$@"