#!/bin/sh
#------------------------------------------------------------------------------
# RRDtool3 - httpd GUI                                                   3.5.0
#
# Creation:     2010-08-29 Tiger
# Last Update:  $Id: rrdtool3.cgi$
#
# Copyright (c) 2010 Fli4L Team
#
#   This OPT package is licensed under Free Software Foundation, Inc.,
#   General Public License Version 2, June 1991
#------------------------------------------------------------------------------

. /srv/www/include/cgi-helper
. /var/run/rrdtool3.conf

: ${CurrentSection:=rrdtool3}
: ${CurrentAction:=view}
: ${CurrentTab:=1}
: ${CurrentTimeline:=`echo $RRDTOOL3_GRAPH_TIMELINE | cut -d' ' -f1`}

ShowError ()
  {
  local Message=$1
  #----------------------
  : ${Message:=General Failure}
  echo "<div class=rrd_error>$Message</div>"
  }

GetLineColour ()
  {
  local ColourIndex=$1
  local PluginName=$2
  #----------------------
  : ${ColourIndex:=1}
  eval local colour_table='$RRDTOOL3_'`echo $PluginName | tr 'a-z' 'A-Z'`'_LINECOLOURS'
  : ${colour_table:=$RRDTOOL3_GRAPH_LINECOLOURS}
  ColourIndex=`expr $ColourIndex % $(echo $colour_table | tr ' ' '\n' | grep -c '.')`
  echo $colour_table | cut -d' ' -f$ColourIndex
  }

GetDecodedTimeline ()
  {
  local Timeline=$1
  #----------------------
  set $_rrdtool3_timestring
  echo $Timeline | sed 's|^1y$|1 '$2'|;\
                        s|y$| '$1'|;\
                        s|^1m$|1 '$6'|;\
                        s|m$| '$5'|;\
                        s|^1w$|1 '$4'|;\
                        s|w$| '$3'|;\
                        s|^1d$|1 '$8'|;\
                        s|d$| '$7'|;\
                        s|^1h$|1 '$10'|;\
                        s|h$| '$9'|;'
  }

ShowGraph ()
  {
  local Timeline=$1
  local ItemList=$2
  local LabelList=$3
  #----------------------
  if [ -n "$ItemList" ]
  then
    # FIXME: Allow multiple sources in each graph
    local source=`echo $ItemList | cut -d':' -f1`
    local parameters=`echo $ItemList | cut -d':' -f2-`
    local source_file=$RRDTOOL3_DIR_INCLUDE/$source.inc
    if [ -f "$source_file" ]
    then
      . "$source_file"
      local params_routine=GetGraphParams_$source
      if type $params_routine > /dev/null
      then
        local options=`eval $params_routine "$Timeline" "$parameters" "$LabelList" | sed 's|^[ ]*||' | tr '\n' ' '`
        if [ -n "$options" ]
        then
          options=`cat << __EOF__ | sed 's|^[ ]*||' | tr '\n' ' '
            --lazy -a PNG -h $RRDTOOL3_GRAPH_HEIGHT -w $RRDTOOL3_GRAPH_WIDTH
            ${RRDTOOL3_RRDCACHED_SOCKET:+--daemon "$RRDTOOL3_RRDCACHED_SOCKET"}
            --end now --start end-$Timeline
            $options
            COMMENT:"\s"
            COMMENT:"$(date "+$_rrdtool3_timestamp_format" | sed 's|:|\\\\:|g')\r"
            ${RRDTOOL3_GRAPH_WATERMARK:+--watermark "$RRDTOOL3_GRAPH_WATERMARK" --font "WATERMARK:8"}
__EOF__
`
          local colour_attribute=
          for colour_attribute in $RRDTOOL3_GRAPH_COLOUR
          do
            options="$options -c $colour_attribute"
          done
          echo $options > /tmp/graph.options
          if ! eval '/usr/bin/rrdtool graph' $options
          then
            ShowError "$_rrdtool3_graph_rendering_error"
          fi
        else
          ShowError "$_rrdtool3_graph_options_error"
        fi
      else
        ShowError "$_rrdtool3_graph_missing_params"
      fi
    else
      ShowError "$_rrdtool3_graph_include_missing ($RRDTOOL3_DIR_INCLUDE_GRAPH/$source.graph)"
    fi
  fi
  }

ShowTabs ()
  {
  local BaseVariable=$1
  local TabLink=$2
  local TabList=$3
  local Timeline=$4
  #----------------------
  if [ -n "$BaseVariable" -a -n "$TabLink" ]
  then
    local current_tab=`echo $TabList | cut -d- -f1`
    : ${current_tab:=1}
    if [ $current_tab -gt $(eval echo '$'$BaseVariable'_N') ]; then current_tab=1; fi
    local tab_headers=
    local tab_index=
    local link=
    for tab_index in `seq 1 $(eval echo '$'$BaseVariable'_N')`
    do
      if [ $tab_index -eq $current_tab ]
      then
        link=no
      else
        link="$TabLink$tab_index"
      fi
      eval local title='$'$BaseVariable'_'$tab_index'_TITLE'
      tab_headers="${tab_headers:+$tab_headers }\"$title\" \"$link\""
    done
    if [ -n "$tab_headers" ]
    then
      eval 'show_tab_header' $tab_headers
      eval local subtab_n='$'$BaseVariable'_'$tab_index'_SUBTAB_N'
      if [ 0$subtab_n -gt 0 ]
      then
        ShowTabs "${BaseVariable}_${current_tab}_SUBTAB" "$TabLink$current_tab-" "`echo $TabList | sed 's|^[0-9]*||;s|^-||'`" "$Timeline"
      fi
      if [ -n "`eval echo '$'$BaseVariable'_'$current_tab'_GRAPH'`" ]
      then
        eval 'ShowGraph "$Timeline" "$'$BaseVariable'_'$current_tab'_GRAPH" "$'$BaseVariable'_'$current_tab'_LABEL"'
      fi
      local graph_index=
      for graph_index in `seq 1 0$(eval echo '0$'$BaseVariable'_'$current_tab'_GRAPH_N')`
      do
        eval 'ShowGraph "$Timeline" "$'$BaseVariable'_'$current_tab'_GRAPH_'$graph_index'" "$'$BaseVariable'_'$current_tab'_LABEL_'$graph_index'"'
      done
      show_tab_footer
    fi
  fi
  }

ShowTimeline ()
  {
  local ButtonLink=$1
  local CurrentTimeline=$2
  #----------------------
  local timeline=
  echo '<div class="tabmain"><ul class="revtab">'
  for timeline in $RRDTOOL3_GRAPH_TIMELINE
  do
    local text=$(GetDecodedTimeline $timeline)
    if [ "$timeline" = "$CurrentTimeline" ]
    then
      echo '<li class="selected"><span class="nolink">'$text'</span></li>'
    else
      echo '<li class="tab"><a href="'$ButtonLink$timeline'">'$text'</a></li>'
    fi
  done
  echo '</ul></div>'
  }

# Parse URI
for uri_item in Action Tab Timeline
do
  eval value='$FORM_'"`echo $uri_item | tr 'A-Z' 'a-z'`"
  eval 'Current'$uri_item='${value:=$Current'$uri_item'}'
done

check_rights "$CurrentSection" "$CurrentAction"

show_html_header "$RRDTOOL3_OPT GUI $RRDTOOL3_VERSION"
  ShowTabs "RRDTOOL3_TAB" "$myname?action=view&amp;timeline=$CurrentTimeline&amp;tab=" "$CurrentTab" "$CurrentTimeline"
  ShowTimeline "$myname?action=view&amp;tab=$CurrentTab&amp;timeline=" "$CurrentTimeline"
show_html_footer