path: root/static/javascript/mauve_utils.js

function updateDate() {

  var n_hours;
  var type_hours;

  //
  // Make sure the number of hours is sane.
  //
  n_hours = new Number( $( '#n_hours' ).val() );

  if (isNaN(n_hours)) {
    n_hours = new Number(2);
  }

  //
  // Make sure the type is one of three things:
  //
  // type_hours = new String( $( '#type_hours' ).val() );

  switch( $( '#type_hours' ).val() ) {
    case "working":
      type_hours = "working"
      break;

    case "daytime":
      type_hours = "daytime"
      break;

    default:
      type_hours = "wallclock";
      break;
  }

  // 
  // Use a asynchronous ajax convert a date to a human string.  NB Date.getTime()
  // returns *milliseconds*
  //
  $.ajax( {
    url:     '/ajax/time_in_x_hours/'+n_hours.toString()+'/'+type_hours,
    timeout: 2000,
    success: function( data )  { 
      $( '#ack_until' ).val( data['time'].toString() );
      $( '#ack_until_text' ).html( "( until "+data['string'].toString()+" )" );
    },
    error:   function( a,b,c ) { 
      //
      //  Date.getTime() returns *milliseconds*
      //
      var this_date = workoutDate( n_hours, type_hours );
      $( '#ack_until' ).val( this_date.getTime()/1000 );
      $( '#ack_until_text' ).html( "( until "+this_date.toString()+" )" ); 
    }
  } );

  return false;
}

function workoutDate( h, type ) {

  n = new Number( h );
  n *= 3600 * 1000;

  if ( type == null ) {
    type = "wallclock" ;
  }

  var step = 3600 * 1000;
  //
  // Get the time now, in milliseconds
  //
  var d    = new Date();
  var t    = d.getTime();

  //
  // Can't ack longer than a week
  //
  var maxDate = new Date( d.getTime() + 1000 * 86400 * 8 )


  //
  // Work out how much time to subtract now
  //
  while ( n >= 0 && t < maxDate.getTime() ) {
    //
    // If we're currently OK, and we won't be OK after the next step ( or
    // vice-versa ) decrease step size, and try again
    //
    if ( doTimeTest( t, type ) != doTimeTest( t+step, type ) ) {
      //
      // Unless we're on the smallest step, try a smaller one.
      //
      if ( step > 1000 ) {
        step /= 60;

      } else {
        if ( doTimeTest( t, type ) ) n -= step;
        t += step;

        //
        // Set the step size back to an hour
        //
        step = 3600*1000;
      }

      continue;
    } 

    //
    // Decrease the time by the step size if we're currently OK.
    //
    if ( doTimeTest( t, type ) ) n -= step;
    t += step;
  }

  //
  // Substract any overshoot.
  //
  if ( n < 0 ) t += n;

  //
  // Make sure we can't ack alerts too far in the future.
  //
  return ( t > maxDate.getTime() ? maxDate : new Date( t ) );
}

function fetchDetail( a ) {
  // Use a synchronous ajax request to fetch the date.
  $.get( '/ajax/alerts_table_alert_detail/'+a,
    function( data ) { 
      $( '#tr_summary_'+a ).after( data );
      // Only fetch the data once.
      $( '#a_detail_'+a ).attr( "onclick",null ).click( function() { $( '#tr_detail_'+a ).toggle(); return false; } );
  } );

  return false;
}

//
// This expects its arguments as a time in milliseconds, and a type of "working", "daytime", or something else.
//
function doTimeTest( t, type ) {
  
  var d = new Date( t );
  var r = false;

  switch ( type ) {
    case "working":
      r = ( d.getDay() > 0 && d.getDay() < 6 && 
          ( ( d.getHours() >= 10 && d.getHours() <= 16 )   || 
            ( d.getHours() == 9  && d.getMinutes() >= 30 ) ||
            ( d.getHours() == 17 && d.getMinutes() < 30 ) 
          ) );
      break;

    case "daytime":
      r = ( d.getHours() >= 8 && d.getHours() < 22 );
      break;

    default:
      r = true;
  } 

  return r;
}


//
// Updates the alerts table
//
function updateAlertsTable(alert_type, group_by) {

  //
  // Do nothing if there is a checked box.
  //
  if ( $('input.alert:checked').length ) {
    return false;
  }

  $.ajax( {
    url:     '/ajax/alerts_table/'+alert_type+'/'+group_by,
    timeout: 30000,
    success: function( data )  { 
      if ( "" == data || null == data ) {
        showError("No data returned by web server when updating alerts table.", "updateAlertsTable");
      } else {
        $('#alerts_table').replaceWith(data); 
        clearError("updateAlertsTable");
        updateAlertCounts();
        //
        // Schedule next update.
        //
        setTimeout("updateAlertsTable('"+alert_type+"','"+group_by+"');", 120000);
      }
    },
    error:   function( a,b,c ) { 
      if ( "timeout" == b ) {
        showError("Web server timed out when updating alerts table.", "updateAlertsTable"); 
      } else {
        showError("Got "+a.status+" "+a.statusText+" when updating alerts table.", "updateAlertsTable"); 
      }
      //
      // Schedule next update.
      //
      setTimeout("updateAlertsTable('"+alert_type+"','"+group_by+"');", 120000);
    },
  });


  return false;
}

//
// Updates the alerts title tag
//
function updateAlertCounts() {
  $.ajax( {
    url: '/ajax/alert_counts',
    timeout: 30000,
    success: function(counts) {
      if ( "" == counts || null == counts) {
        showError("No data returned by web server when updating alert counts.", "updateAlertCounts");
      } else {
        $('#count_raised').html(counts[0]+counts[1]+counts[2]+"");
        $('#count_ackd').html(counts[3]+"");
        $('#count_cleared').html(counts[4]+"");
        $('title').html("Mauve: [ "+counts[0]+" / "+counts[1]+" / "+counts[2]+" ] Alerts");
        clearError("updateAlertCounts");
      }
    },
    error:   function( a,b,c ) { 
      if ( "timeout" == b ) {
        showError("Web server timed out when updating alert counts.", "updateAlertCounts"); 
      } else {
        showError("Got "+a.status+" "+a.statusText+" when updating alert counts.", "updateAlertCounts"); 
      }
    },
  });

  return false;
}


//
// 
//
function showError(text, func) {

  if ( null == text || "" == text ) return false;
   

  // We need to add the p element.
  if ( 0 == $('div.flash.error p#'+func).length ) {
    // ugh.. standard DOM stuff.
    var p = document.createElement('p');
    p.setAttribute("id",func);
    $('div.flash.error').append(p);
  }

  $('p#'+func).html(text);
  // Show the error box
  $('div.flash.error').fadeIn(2000);

  return false;
}

function clearError(func) {
  //
  // Remove the element if it exists.
  //
  if ( $('div.flash.error p#'+func).length ) {
    $('div.flash.error p#'+func).remove();
  }

  if ( $('div.flash.error').contents().length == 0 ) {
    $('div.flash.error').hide();
  }

  return false;
}