path: root/localsmsadmin

#!/bin/sh

set -e

# make data writable both from kannel and designated shell accounts
umask 0007

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"
    exit 1
}

findobjects() {
    set -e
    type="$1"; [ -n "$type" ] || return1 "Internal error (findobjects: empty type)!"; shift
    limit="$@"
    regex="$(echo  "$limit" | perl -ne '/^\/(.+)\/$/ and print $1')"
    args="$(echo  "$limit" | perl -ne 's/.*?([a-z0-9]+).*?/ $1/g and print')"
    [ -d "$vardir/$type" ] || exit0
    if [ -z "$*" ]; then
        cd "$vardir/$type" && find -mindepth 1 -maxdepth 1 -type d -printf '%f\n'
    elif [ -n "$regex" ]; then
        cd "$vardir/$type" && find -mindepth 1 -maxdepth 1 -type d -regex "$regex"
    elif [ -n $args ]; then
        args_multiline="$(echo "$args" | perl -pe 's/[[:space:]]+/\n/g')"
        cd "$vardir/$type" && ! find -mindepth 1 -maxdepth 1 -type d -printf '%f\n' \
            | grep -Fx "$args_multiline" || true
    else
        exit1 "Internal error (findobjects: illegal limit)!"
    fi
}
finditems() {
    set -e
    type="$1"; [ -n "$type" ] || exit1 "Internal error (finditems: empty type)!"; shift
    name="$1"; [ -n "$name" ] || exit1 "Internal error (finditems: empty name)!"; shift
    limit="$@"
    regex="$(echo  "$limit" | perl -ne '/^\/(.+)\/$/ and print $1')"
    args="$(echo  "$limit" | perl -ne 's/.*?([a-z0-9]+).*?/ $1/g and print')"
    dir="$type/$name"
    [ -d "$vardir/$dir" ] || exit0
    if [ -z "$*" ]; then
        cd "$vardir/$dir" && find -mindepth 1 -maxdepth 1 -type f -printf '%f\n'
    elif [ -n "$regex" ]; then
        cd "$vardir/$dir" && find -mindepth 1 -maxdepth 1 -type f -regex "$regex"
    elif [ -n $args ]; then
        args_multiline="$(echo "$args" | perl -pe 's/[[:space:]]+/\n/g')"
        cd "$vardir/$dir" && ! find -mindepth 1 -maxdepth 1 -type f -printf '%f\n' \
            | grep -Fx "$args_multiline" || true
    else
        exit1 "Internal error (finditems: illegal limit)!"
    fi
}
getitem() {
    set -e
    type="$1"; [ -n "$type" ] || exit1 "Internal error (getitem: empty type)!"; shift
    name="$1"; [ -n "$name" ] || exit1 "Internal error (getitem: empty name)!"; shift
    item="$1"; [ -n "$item" ] || exit1 "Internal error (getitem: empty item)!"; shift
    file="$type/$name/$item"
    [ ! -s "$vardir/$file" ] || cat "$vardir/$file"
}
additem() {
    set -e
    type="$1"; [ -n "$type" ] || exit1 "Internal error (additem: empty type)!"; shift
    name="$1"; [ -n "$name" ] || exit1 "Internal error (additem: empty name)!"; shift
    item="$1"; [ -n "$item" ] || exit1 "Internal error (additem: empty item)!"; shift
    data="$*"; [ -n "$data" ] || exit1 "Internal error (additem: empty data)!"; shift
    data="$(echo "$data" | perl -0 -pe 's/\s+/ /g; s/^\s+//; s/\s+$//')"
    truename="$(findobjects "$type" "$name")" || exit1 "$truename"
    [ -n "$truename" ] || exit1 "No $type named \"$name\"!"
    file="$type/$truename/$item"
#   [ ! -s "$vardir/$file" ] || linecount="$(grep -c . "$vardir/$file")"
#   echo "$data" >> "$vardir/$file"
#   chgrp --reference="$vardir" "$vardir/$file"
#   echo "$data${linecount+ (on top of $linecount other values)}"
    [ ! -s "$vardir/$file" ] || linecount="$(grep -c . "$vardir/$file")"
    echo "$data" > "$vardir/$file"
#   chgrp --reference="$vardir" "$vardir/$file"
    echo "$data"
}
addobject() {
    set -e
    type="$1"; [ -n "$type" ] || exit1 "Internal error (addobject: empty type)!"; shift
    name="$1"; [ -n "$name" ] || exit1 "Internal error (addobject: empty name)!"; shift
    fallback="$1"; [ -n "$fallback" ] || exit1 "Internal error (addobject: empty fallback)!"; shift
    [ -z "$*" ] || exit1 "Internal error (addobject: too many options)!"
    case "$fallback" in
        keep|replace|fail) :;;
        *) exit1 "Internal error (addobject: unknown fallback)!";;
    esac

#   if [ -e "$vardir/$type/$name" ]; then
    oldname="$(findobjects "$type" "$name")" || exit1 "$oldname"
    if [ -n "$oldname" ]; then
        case "$fallback" in
          keep)
            action="kept"
            ;;
          replace)
            delopbject "$type" "$oldname"
            ;;
# TODO        rename)
# TODO          renameopbject "$type" "$oldname"
# TODO          ;;
          fail)
            exit1 "Adding $type failed ($name already exists)!"
            ;;
        esac
    else
        mkdir -p "$vardir/$type/$name"
#       chgrp -R --reference="$vardir" "$vardir/$type"
    fi
}

cmd="$1"; shift
case "$cmd" in
  add|create)
    type="$1"; [ -n "$type" ] || exit1 "Internal error (empty type)!"; shift
    name="$1"; [ -n "$name" ] || exit1 "Internal error (empty name)!"; shift
    oldname="$(findobjects "$type" "$name")" || exit1 "$oldname"

    case "$type" in
      default)
        case "$name" in
            session|prefix)
            item="$name"
            data="$1"
            ;;
            *)
            exit1 "unknown default \"$1\""
            ;;
        esac
        str=$(addobject "$type" "$name" keep) || exit1 "$str"
        str=$(additem "$type" "$name" "$item" "$data") || exit1 "$str"
        response="Added $type $name $data"
        ;;
      user)
        session="$(getitem "default" "session" "session")" || exit1 "Internal error: $session"
        [ -z "$session" ] || session_group="$(getitem "session" "$session" "group")" || exit1 "Internal error: $session_group"
        plural=
        for chunk in $@; do
            case $chunk in
              +[[:digit:]]*)
                [ -z "$phone" ] || exit1 "Too many phone numbers (use only a single number, e.g. 40843136 or +4540843136)!"
                phone="$chunk"
                ;;
              [[:digit:]][[:digit:]][[:digit:]][[:digit:]]*)
                [ -z "$phone" ] || exit1 "Too many phone numbers (use only a single number, e.g. 40843136 or +4540843136)!"
                [ -z "$session" ] || prefix="$(getitem "session" "$session" "prefix")" || exit1 "Internal error: $prefix"
                [ -n "$prefix" ] || exit1 "Missing prefix (use international phone numbering, e.g. +4540843136${session+, or add default prefix to session $session})!"
                # TODO: optionally validate $phone_min and $phone_max
                phone="$prefix$chunk"
                ;;
              [[:alpha:]][[:alnum:]]*)
                [ -z "$groups" ] || plural=true
                groups="${groups+$groups }$chunk"
                ;;
              *)
                exit1 "Internal error (unknown user item \"$1\")!"
                ;;
            esac
        done
        response="Added $type $name"
        fallback=fail
        if [ -z "$oldname" ]; then
            [ -n "$phone" ] || exit1 "Missing phone number (required)!"
        else
            [ -n "$phone$groups" ] || exit1 "No items to update (include one or more of phone number and groups)!"
            fallback=keep
            response="Updated $type $name"
        fi
        str=$(addobject "$type" "$name" "$fallback") || exit1 "$str"
        [ -z "$phone" ] || dummy="$(additem "$type" "$name" "phone" "$phone")"
# TODO: distinguish session group from included ones (i.e. mention explicitly if added)
        [ -z "$session_group" ] || groups="$session_group $groups"
        for group in $groups; do
# TODO: strip existing, duplicate and session groups, and mention stripping in response
            dummy="$(additem "$type" "$name" "group" "$group")"
        done
        if [ -n "$phone" ]; then
            if [ -n "$groups" ]; then
                response="$response with phone $phone and group${plural+s} $groups"
            else
                response="$response with phone $phone"
            fi
        elif [ -n "$groups" ]; then
            response="$response with group${plural+s} $groups"
        fi
        ;;
      group)
        for chunk in $@; do
            case $chunk in
              [[:alpha:]][[:alnum:]]*)
                [ -z "$session" ] || exit1 "Too many sessions (a group can be only in a single session)!"
                session="$chunk"
                ;;
              *)
                exit1 "Internal error (unknown group item \"$1\")!"
                ;;
            esac
        done
        response="Added $type $name"
        fallback=fail
        if [ -n "$oldname" ]; then
            [ -n "$session" ] || exit1 "Group already exists (and no session name to update was included)!"
            fallback=keep
            response="Updated $type $name"
        fi
        str=$(addobject "$type" "$name" "$fallback") || exit1 "$str"
        [ -z "$session" ] || dummy="$(additem "$type" "$name" "session" "$session")"
        [ -z "$session" ] || response="$response with session $session"
        ;;
      session)
        for chunk in $@; do
            case $chunk in
              +[[:digit:]]*)
                [ -z "$prefix" ] || exit1 "Too many country prefixes (use only one, e.g. +45)!"
                prefix="$chunk"
                ;;
              [[:alpha:]][[:alnum:]]*)
                [ -z "$group" ] || exit1 "Too many default groups (use only one)!"
# FIXME: fail if group does not exist
                group="$chunk"
                ;;
              *)
                exit1 "Internal error (unknown session item \"$1\")!"
                ;;
            esac
        done
# TODO: distinguish default prefix from included one (i.e. mention explicitly if added)
        [ -n "$prefix" ] || prefix="$(getitem "default" "prefix" "prefix")" || exit1 "Internal error: $prefix"
        response="Added $type $name"
        fallback=fail
        if [ -n "$oldname" ]; then
            [ -n "$prefix$group" ] || exit1 "Session already exists (and no default group or country prefix to add/update was included)!"
            fallback=keep
            response="Updated $type $name"
        fi
        str=$(addobject "$type" "$name" "$fallback") || exit1 "$str"
        [ -z "$prefix" ] || dummy="$(additem "$type" "$name" "prefix" "$prefix")"
        [ -z "$group" ] || dummy="$(additem "$type" "$name" "group" "$group")"
        if [ -n "$prefix" ]; then
            if [ -n "$group" ]; then
                response="$response with default country prefix $prefix and default group $group"
            else
                response="$response with default country prefix $prefix"
            fi
        elif [ -n "$group" ]; then
            response="$response with default group $group"
        fi
        ;;
      *)
        exit1 "Cannot add \"$1\" (try \"/help\" to see supported commands)!"
        ;;
    esac
    exit0 "$response"
    ;;
  del|delete|remove)
    case "$1" in
      default|user|group|session)
        type="$1"; shift
        name="$1"; [ -n "$name" ] || exit1 "Internal error (empty name)!"; shift
        [ -z "$*" ] || exit1 "Internal error (too many options)!"
        oldname="$(findobjects "$type" "$name")" || exit1 "Internal error${oldname+: $oldname}"
        [ -n "$oldname" ] || exit1 "No $type named \"$name\"!"
        items="$(finditems "$type" "$name")" || exit1 "Internal error${items+: $items}"
# TODO: find user by phone number
        for item in $items; do
            rm "$vardir/$type/$name/$item" || exit1 "Internal error during $type $name item removal!"
        done
# FIXME: remove items of other objects referencing this object
        rmdir "$vardir/$type/$name" || exit1 "Internal error during $type $name object removal!"
        exit0 "Deleted $type: $name."
        ;;
      *)
        exit1 "Cannot delete \"$1\" (try \"/help\" to see supported commands)!"
        ;;
    esac
    ;;
  list|show|view)
    case "$1" in
      default|user|group|session)
        type="$1"; shift
        response="$(listobject "$type" "$@")" || exit1 "Failed listing $type${response+: $response}"
        exit0 "Listing $type: $response."
        ;;
      *)
        exit1 "Cannot list \"$1\" (try \"/help\" to see supported commands)!"
        ;;
    esac
    ;;
  help)
    cat <<EOF
Admin commands:
/add user NICK [+PREFIX]NUMBER [GROUP ...]
/add group GROUP [USER ...]
/add session SESSION [PREFIX] [GROUP]
/add default prefix|session VALUE
/del user NICK|NUMBER
/del group GROUP
/del session SESSION
/del default prefix|session
EOF
    exit 0
    ;;
  status)
    response="$($sbindir/localshowkannelstatus)"
    exit0 "$response"
    ;;
  *)
    exit1 "unknown command \"$cmd\"!"
    ;;
esac