#!/bin/bash
#
# webbuild functions
# Copyright (c) 2012 by Silvan Calarco <silvan.calarco@mambasoft.it>
#
. /etc/autodist/config

SUDO_WRAPPER="sudo /usr/libexec/webbuild-sudo"
#STATEDIR=$WEBBUILD_STATEDIR
LOG=$WEBBUILD_STATEDIR/access_log
DEFAULT_ENVIRONMENT=0
[ "`uname -m`" = "x86_64" ] && HOST_IS_X86_64=1

function set_user_state_var() {
   local statevar=$1
   local statevalue=$2
   local stateuser=$3

   [ ! "$stateuser" ] && stateuser=$USER

   [ "$1" ] || return

   [ -e $WEBBUILD_STATEDIR/users/$stateuser.state ] || touch $WEBBUILD_STATEDIR/users/$stateuser.state
   sed -i "/^$statevar=/d" $WEBBUILD_STATEDIR/users/$stateuser.state
   [ "$statevalue" ] && echo "$statevar=$statevalue" >> $WEBBUILD_STATEDIR/users/$stateuser.state
}

function social_log() {
   local line=$1

   [ "$line" ] || return

   if [ ! "$STATE_FAKEUSER" ]; then
      STATE_SOCIALLOG_ID=0
      . $WEBBUILD_STATEDIR/users/webbuild.state
      STATE_SOCIALLOG_ID=`expr $STATE_SOCIALLOG_ID + 1`
      set_user_state_var STATE_SOCIALLOG_ID $STATE_SOCIALLOG_ID webbuild
      echo "SID=$STATE_SOCIALLOG_ID SPRIVACY=$STATE_PRIVACYMODE $line" >> $WEBBUILD_STATEDIR/social_log
   fi
}

function cgi_encodevar() {
  local string="${1}"
  local strlen=${#string}
  local encoded=""

  for (( pos=0 ; pos<strlen ; pos++ )); do
     c=${string:$pos:1}
     case "$c" in
        [-_.~a-zA-Z0-9] ) o="${c}" ;;
        * )               printf -v o '%%%02x' "'$c"
     esac
     encoded+="${o}"
  done
  echo -n "${encoded}"    # You can either set a return variable (FASTER) 
#  REPLY="${encoded}"   #+or echo the result (EASIER)... or both... :p
}

#This code for getting code from post data is from http://oinkzwurgl.org/bash_cgi and
#was written by Phillippe Kehi <phkehi@gmx.net> and flipflip industries

# (internal) routine to store POST data
function cgi_get_POST_vars()
{
    # check content type
    # FIXME: not sure if we could handle uploads with this..
    [ "${CONTENT_TYPE}" != "application/x-www-form-urlencoded" ] && \
       echo "Warning: you should probably use MIME type "\
            "application/x-www-form-urlencoded!" 1>&2
    # save POST variables (only first time this is called)
    [ -z "$QUERY_STRING_POST" \
      -a "$REQUEST_METHOD" = "POST" -a ! -z "$CONTENT_LENGTH" ] &&
        read -n $CONTENT_LENGTH QUERY_STRING_POST
    return
}

# (internal) routine to decode urlencoded strings
function cgi_decodevar()
{
    [ $# -ne 1 ] && return
    local v t h
    # replace all + with whitespace and append %%
    t="${1//+/ }%%"
    while [ ${#t} -gt 0 -a "${t}" != "%" ]; do
	v="${v}${t%%\%*}" # digest up to the first %
	t="${t#*%}"       # remove digested part
	# decode if there is anything to decode and if not at end of string
	if [ ${#t} -gt 0 -a "${t}" != "%" ]; then
	    h=${t:0:2} # save first two chars
	    t="${t:2}" # remove these
	    if [ "${h}" = "22" ]; then
	       v="${v}\\\""
	    elif [ "${h}" = "0A" ]; then
	       v="${v}\\\n"
	    elif [ "${h}" = "24" ]; then
	       v="${v}\\\$"
	    elif [ "${h}" = "60" ]; then
	       v="${v}\\\`"
	    else
	       v="${v}"`echo -e \\\\x${h}` # convert hex to special char
	    fi
	fi
    done
    # return decoded string
    echo "${v}"
    return
}

# routine to get variables from http requests
# usage: cgi_getvars method varname1 [.. varnameN]
# method is either GET or POST or BOTH
# the magic varible name ALL gets everything
function cgi_getvars()
{
    [ $# -lt 2 ] && return
    local q p k v s
    # get query
    case $1 in
	GET)
	    [ ! -z "${QUERY_STRING}" ] && q="${QUERY_STRING}&"
	    ;;
	POST)
	    cgi_get_POST_vars
	    [ ! -z "${QUERY_STRING_POST}" ] && q="${QUERY_STRING_POST}&"
	    ;;
	BOTH)
	    [ ! -z "${QUERY_STRING}" ] && q="${QUERY_STRING}&"
	    cgi_get_POST_vars
	    [ ! -z "${QUERY_STRING_POST}" ] && q="${q}${QUERY_STRING_POST}&"
	    ;;
    esac
    shift
    s=" $* "
    # parse the query data
    while [ ! -z "$q" ]; do
        p=`echo $q | sed "s|&.*||"`
        q=`echo $q | sed "s|[^&]*&||"`
	k="${p%%=*}"  # get the key (variable name) from it
	v="${p#*=}"   # get the value from it
        # decode and evaluate var if requested
        if [ "$k" != "SPECTEXT" ]; then
           v=`cgi_decodevar "$v"`
        fi
        eval "$k=\"$v\""
    done
    return
}

function kill_tree() {
   local killpid=$1

   [ $1 ] || return

   kill `pstree -p $killpid | sed 's/(/\n(/g' | grep '(' | sed 's/(\(.*\)).*/\1/' | tr "\n" " "`
   return $?
}