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Filename : zoom_plot_jqplot.js
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// TODO: change the axis
/**
 * @fileoverview JavaScript functions used on /table/search
 *
 * @requires    jQuery
 * @requires    js/functions.js
 **/

/* global changeValueFieldType, verifyAfterSearchFieldChange */ // js/table/change.js

/**
 *  Display Help/Info
 * @return {false}
 **/
function displayHelp() {
  var modal = $('#helpModal');
  modal.modal('show');
  modal.find('.modal-body').first().html(Messages.strDisplayHelp);
  $('#helpModalLabel').first().html(Messages.strHelpTitle);
  return false;
}

/**
 * Extend the array object for max function
 * @param {number[]} array
 * @return {int}
 **/
Array.max = function (array) {
  return Math.max.apply(Math, array);
};

/**
 * Extend the array object for min function
 * @param {number[]} array
 * @return {int}
 **/
Array.min = function (array) {
  return Math.min.apply(Math, array);
};

/**
 * Checks if a string contains only numeric value
 * @param {string} n (to be checked)
 * @return {bool}
 **/
function isNumeric(n) {
  return !isNaN(parseFloat(n)) && isFinite(n);
}

/**
 ** Checks if an object is empty
 * @param {object} obj (to be checked)
 * @return {bool}
 **/
function isEmpty(obj) {
  var name;
  for (name in obj) {
    return false;
  }
  return true;
}

/**
 * Converts a date/time into timestamp
 * @param {string} val Date
 * @param {string} type Field type(datetime/timestamp/time/date)
 * @return {any} A value
 **/
function getTimeStamp(val, type) {
  if (type.toString().search(/datetime/i) !== -1 || type.toString().search(/timestamp/i) !== -1) {
    return $.datepicker.parseDateTime('yy-mm-dd', 'HH:mm:ss', val);
  } else if (type.toString().search(/time/i) !== -1) {
    return $.datepicker.parseDateTime('yy-mm-dd', 'HH:mm:ss', '1970-01-01 ' + val);
  } else if (type.toString().search(/date/i) !== -1) {
    return $.datepicker.parseDate('yy-mm-dd', val);
  }
}

/**
 * Classifies the field type into numeric,timeseries or text
 * @param {object} field field type (as in database structure)
 * @return {'text'|'numeric'|'time'}
 **/
function getType(field) {
  if (field.toString().search(/int/i) !== -1 || field.toString().search(/decimal/i) !== -1 || field.toString().search(/year/i) !== -1) {
    return 'numeric';
  } else if (field.toString().search(/time/i) !== -1 || field.toString().search(/date/i) !== -1) {
    return 'time';
  } else {
    return 'text';
  }
}

/**
 * Unbind all event handlers before tearing down a page
 */
AJAX.registerTeardown('table/zoom_plot_jqplot.js', function () {
  $('#tableid_0').off('change');
  $('#tableid_1').off('change');
  $('#tableid_2').off('change');
  $('#tableid_3').off('change');
  $('#inputFormSubmitId').off('click');
  $('#togglesearchformlink').off('click');
  $(document).off('keydown', '#dataDisplay :input');
  $('button.button-reset').off('click');
  $('div#resizer').off('resizestop');
  $('div#querychart').off('jqplotDataClick');
});
AJAX.registerOnload('table/zoom_plot_jqplot.js', function () {
  var currentChart = null;
  var searchedDataKey = null;
  var xLabel = $('#tableid_0').val();
  var yLabel = $('#tableid_1').val();
  // will be updated via Ajax
  var xType = $('#types_0').val();
  var yType = $('#types_1').val();
  var dataLabel = $('#dataLabel').val();

  // Get query result
  var searchedData;
  try {
    searchedData = JSON.parse($('#querydata').html());
  } catch (err) {
    searchedData = null;
  }

  // adding event listener on select after AJAX request
  var comparisonOperatorOnChange = function () {
    var tableRows = $('#inputSection select.column-operator');
    $.each(tableRows, function (index, item) {
      $(item).on('change', function () {
        changeValueFieldType(this, index);
        verifyAfterSearchFieldChange(index, '#zoom_search_form');
      });
    });
  };

  /**
   ** Input form submit on field change
   **/

  // first column choice corresponds to the X axis
  $('#tableid_0').on('change', function () {
    // AJAX request for field type, collation, operators, and value field
    $.post('index.php?route=/table/zoom-search', {
      'ajax_request': true,
      'change_tbl_info': true,
      'server': CommonParams.get('server'),
      'db': CommonParams.get('db'),
      'table': CommonParams.get('table'),
      'field': $('#tableid_0').val(),
      'it': 0
    }, function (data) {
      $('#tableFieldsId').find('tr').eq(1).find('td').eq(0).html(data.field_type);
      $('#tableFieldsId').find('tr').eq(1).find('td').eq(1).html(data.field_collation);
      $('#tableFieldsId').find('tr').eq(1).find('td').eq(2).html(data.field_operators);
      $('#tableFieldsId').find('tr').eq(1).find('td').eq(3).html(data.field_value);
      xLabel = $('#tableid_0').val();
      $('#types_0').val(data.field_type);
      xType = data.field_type;
      $('#collations_0').val(data.field_collations);
      comparisonOperatorOnChange();
      Functions.addDateTimePicker();
    });
  });

  // second column choice corresponds to the Y axis
  $('#tableid_1').on('change', function () {
    // AJAX request for field type, collation, operators, and value field
    $.post('index.php?route=/table/zoom-search', {
      'ajax_request': true,
      'change_tbl_info': true,
      'server': CommonParams.get('server'),
      'db': CommonParams.get('db'),
      'table': CommonParams.get('table'),
      'field': $('#tableid_1').val(),
      'it': 1
    }, function (data) {
      $('#tableFieldsId').find('tr').eq(2).find('td').eq(0).html(data.field_type);
      $('#tableFieldsId').find('tr').eq(2).find('td').eq(1).html(data.field_collation);
      $('#tableFieldsId').find('tr').eq(2).find('td').eq(2).html(data.field_operators);
      $('#tableFieldsId').find('tr').eq(2).find('td').eq(3).html(data.field_value);
      yLabel = $('#tableid_1').val();
      $('#types_1').val(data.field_type);
      yType = data.field_type;
      $('#collations_1').val(data.field_collations);
      comparisonOperatorOnChange();
      Functions.addDateTimePicker();
    });
  });
  $('#tableid_2').on('change', function () {
    // AJAX request for field type, collation, operators, and value field
    $.post('index.php?route=/table/zoom-search', {
      'ajax_request': true,
      'change_tbl_info': true,
      'server': CommonParams.get('server'),
      'db': CommonParams.get('db'),
      'table': CommonParams.get('table'),
      'field': $('#tableid_2').val(),
      'it': 2
    }, function (data) {
      $('#tableFieldsId').find('tr').eq(4).find('td').eq(0).html(data.field_type);
      $('#tableFieldsId').find('tr').eq(4).find('td').eq(1).html(data.field_collation);
      $('#tableFieldsId').find('tr').eq(4).find('td').eq(2).html(data.field_operators);
      $('#tableFieldsId').find('tr').eq(4).find('td').eq(3).html(data.field_value);
      $('#types_2').val(data.field_type);
      $('#collations_2').val(data.field_collations);
      comparisonOperatorOnChange();
      Functions.addDateTimePicker();
    });
  });
  $('#tableid_3').on('change', function () {
    // AJAX request for field type, collation, operators, and value field
    $.post('index.php?route=/table/zoom-search', {
      'ajax_request': true,
      'change_tbl_info': true,
      'server': CommonParams.get('server'),
      'db': CommonParams.get('db'),
      'table': CommonParams.get('table'),
      'field': $('#tableid_3').val(),
      'it': 3
    }, function (data) {
      $('#tableFieldsId').find('tr').eq(5).find('td').eq(0).html(data.field_type);
      $('#tableFieldsId').find('tr').eq(5).find('td').eq(1).html(data.field_collation);
      $('#tableFieldsId').find('tr').eq(5).find('td').eq(2).html(data.field_operators);
      $('#tableFieldsId').find('tr').eq(5).find('td').eq(3).html(data.field_value);
      $('#types_3').val(data.field_type);
      $('#collations_3').val(data.field_collations);
      comparisonOperatorOnChange();
      Functions.addDateTimePicker();
    });
  });

  /**
   * Input form validation
   **/
  $('#inputFormSubmitId').on('click', function () {
    if ($('#tableid_0').get(0).selectedIndex === 0 || $('#tableid_1').get(0).selectedIndex === 0) {
      Functions.ajaxShowMessage(Messages.strInputNull);
    } else if (xLabel === yLabel) {
      Functions.ajaxShowMessage(Messages.strSameInputs);
    }
  });

  /**
    ** Prepare a div containing a link, otherwise it's incorrectly displayed
    ** after a couple of clicks
    **/
  $('<div id="togglesearchformdiv"><a id="togglesearchformlink"></a></div>').insertAfter('#zoom_search_form')
  // don't show it until we have results on-screen
  .hide();
  $('#togglesearchformlink').html(Messages.strShowSearchCriteria).on('click', function () {
    var $link = $(this);
    $('#zoom_search_form').slideToggle();
    if ($link.text() === Messages.strHideSearchCriteria) {
      $link.text(Messages.strShowSearchCriteria);
    } else {
      $link.text(Messages.strHideSearchCriteria);
    }
    // avoid default click action
    return false;
  });

  /**
   * Handle saving of a row in the editor
   */
  var dataPointSave = function () {
    // Find changed values by comparing form values with selectedRow Object
    var newValues = {}; // Stores the values changed from original
    var sqlTypes = {};
    var it = 0;
    var xChange = false;
    var yChange = false;
    var key;
    var tempGetVal = function () {
      return $(this).val();
    };
    for (key in selectedRow) {
      var oldVal = selectedRow[key];
      var newVal = $('#edit_fields_null_id_' + it).prop('checked') ? null : $('#edit_fieldID_' + it).val();
      if (newVal instanceof Array) {
        // when the column is of type SET
        newVal = $('#edit_fieldID_' + it).map(tempGetVal).get().join(',');
      }
      if (oldVal !== newVal) {
        selectedRow[key] = newVal;
        newValues[key] = newVal;
        if (key === xLabel) {
          xChange = true;
          searchedData[searchedDataKey][xLabel] = newVal;
        } else if (key === yLabel) {
          yChange = true;
          searchedData[searchedDataKey][yLabel] = newVal;
        }
      }
      var $input = $('#edit_fieldID_' + it);
      if ($input.hasClass('bit')) {
        sqlTypes[key] = 'bit';
      } else {
        sqlTypes[key] = null;
      }
      it++;
    } // End data update

    // Update the chart series and replot
    if (xChange || yChange) {
      // Logic similar to plot generation, replot only if xAxis changes or yAxis changes.
      // Code includes a lot of checks so as to replot only when necessary
      if (xChange) {
        xCord[searchedDataKey] = selectedRow[xLabel];
        // [searchedDataKey][0] contains the x value
        if (xType === 'numeric') {
          series[0][searchedDataKey][0] = selectedRow[xLabel];
        } else if (xType === 'time') {
          series[0][searchedDataKey][0] = getTimeStamp(selectedRow[xLabel], $('#types_0').val());
        } else {
          series[0][searchedDataKey][0] = '';
          // TODO: text values
        }
        currentChart.series[0].data = series[0];
        // TODO: axis changing
        currentChart.replot();
      }
      if (yChange) {
        yCord[searchedDataKey] = selectedRow[yLabel];
        // [searchedDataKey][1] contains the y value
        if (yType === 'numeric') {
          series[0][searchedDataKey][1] = selectedRow[yLabel];
        } else if (yType === 'time') {
          series[0][searchedDataKey][1] = getTimeStamp(selectedRow[yLabel], $('#types_1').val());
        } else {
          series[0][searchedDataKey][1] = '';
          // TODO: text values
        }
        currentChart.series[0].data = series[0];
        // TODO: axis changing
        currentChart.replot();
      }
    } // End plot update

    // Generate SQL query for update
    if (!isEmpty(newValues)) {
      var sqlQuery = 'UPDATE `' + CommonParams.get('table') + '` SET ';
      for (key in newValues) {
        sqlQuery += '`' + key + '`=';
        var value = newValues[key];

        // null
        if (value === null) {
          sqlQuery += 'NULL, ';

          // empty
        } else if (value.trim() === '') {
          sqlQuery += '\'\', ';

          // other
        } else {
          // type explicitly identified
          if (sqlTypes[key] !== null) {
            if (sqlTypes[key] === 'bit') {
              sqlQuery += 'b\'' + value + '\', ';
            }
            // type not explicitly identified
          } else {
            if (!isNumeric(value)) {
              sqlQuery += '\'' + value + '\', ';
            } else {
              sqlQuery += value + ', ';
            }
          }
        }
      }
      // remove two extraneous characters ', '
      sqlQuery = sqlQuery.substring(0, sqlQuery.length - 2);
      sqlQuery += ' WHERE ' + Sql.urlDecode(searchedData[searchedDataKey].where_clause);
      $.post('index.php?route=/sql', {
        'server': CommonParams.get('server'),
        'db': CommonParams.get('db'),
        'ajax_request': true,
        'sql_query': sqlQuery,
        'inline_edit': false
      }, function (data) {
        if (typeof data !== 'undefined' && data.success === true) {
          $('#sqlqueryresultsouter').html(data.sql_query);
          Functions.highlightSql($('#sqlqueryresultsouter'));
        } else {
          Functions.ajaxShowMessage(data.error, false);
        }
      }); // End $.post
    } // End database update
  };
  $('#dataPointSaveButton').on('click', function () {
    dataPointSave();
  });
  $('#dataPointModalLabel').first().html(Messages.strDataPointContent);

  /**
   * Attach Ajax event handlers for input fields
   * in the dialog. Used to submit the Ajax
   * request when the ENTER key is pressed.
   */
  $(document).on('keydown', '#dataDisplay :input', function (e) {
    if (e.which === 13) {
      // 13 is the ENTER key
      e.preventDefault();
      if (typeof dataPointSave === 'function') {
        dataPointSave();
      }
    }
  });

  /*
   * Generate plot using jqplot
   */

  if (searchedData !== null) {
    $('#zoom_search_form').slideToggle().hide();
    $('#togglesearchformlink').text(Messages.strShowSearchCriteria);
    $('#togglesearchformdiv').show();
    var selectedRow;
    var series = [];
    var xCord = [];
    var yCord = [];
    var xVal;
    var yVal;
    var format;
    var options = {
      series: [
      // for a scatter plot
      {
        showLine: false
      }],
      grid: {
        drawBorder: false,
        shadow: false,
        background: 'rgba(0,0,0,0)'
      },
      axes: {
        xaxis: {
          label: $('#tableid_0').val(),
          labelRenderer: $.jqplot.CanvasAxisLabelRenderer
        },
        yaxis: {
          label: $('#tableid_1').val(),
          labelRenderer: $.jqplot.CanvasAxisLabelRenderer
        }
      },
      highlighter: {
        show: true,
        tooltipAxes: 'y',
        yvalues: 2,
        // hide the first y value
        formatString: '<span class="hide">%s</span>%s'
      },
      cursor: {
        show: true,
        zoom: true,
        showTooltip: false
      }
    };

    // If data label is not set, do not show tooltips
    if (dataLabel === '') {
      options.highlighter.show = false;
    }

    // Classify types as either numeric,time,text
    xType = getType(xType);
    yType = getType(yType);

    // could have multiple series but we'll have just one
    series[0] = [];
    if (xType === 'time') {
      var originalXType = $('#types_0').val();
      if (originalXType === 'date') {
        format = '%Y-%m-%d';
      }
      // TODO: does not seem to work
      // else if (originalXType === 'time') {
      //  format = '%H:%M';
      // } else {
      //    format = '%Y-%m-%d %H:%M';
      // }
      $.extend(options.axes.xaxis, {
        renderer: $.jqplot.DateAxisRenderer,
        tickOptions: {
          formatString: format
        }
      });
    }
    if (yType === 'time') {
      var originalYType = $('#types_1').val();
      if (originalYType === 'date') {
        format = '%Y-%m-%d';
      }
      $.extend(options.axes.yaxis, {
        renderer: $.jqplot.DateAxisRenderer,
        tickOptions: {
          formatString: format
        }
      });
    }
    $.each(searchedData, function (key, value) {
      if (xType === 'numeric') {
        xVal = parseFloat(value[xLabel]);
      }
      if (xType === 'time') {
        xVal = getTimeStamp(value[xLabel], originalXType);
      }
      if (yType === 'numeric') {
        yVal = parseFloat(value[yLabel]);
      }
      if (yType === 'time') {
        yVal = getTimeStamp(value[yLabel], originalYType);
      }
      series[0].push([xVal, yVal,
      // extra Y values
      value[dataLabel],
      // for highlighter
      // (may set an undefined value)
      value.where_clause,
      // for click on point
      key,
      // key from searchedData
      value.where_clause_sign]);
    });

    // under IE 8, the initial display is mangled; after a manual
    // resizing, it's ok
    // under IE 9, everything is fine
    currentChart = $.jqplot('querychart', series, options);
    currentChart.resetZoom();
    $('button.button-reset').on('click', function (event) {
      event.preventDefault();
      currentChart.resetZoom();
    });
    $('div#resizer').resizable();
    $('div#resizer').on('resizestop', function () {
      // make room so that the handle will still appear
      $('div#querychart').height($('div#resizer').height() * 0.96);
      $('div#querychart').width($('div#resizer').width() * 0.96);
      currentChart.replot({
        resetAxes: true
      });
    });
    $('div#querychart').on('jqplotDataClick', function (event, seriesIndex, pointIndex, data) {
      searchedDataKey = data[4]; // key from searchedData (global)
      var fieldId = 0;
      var postParams = {
        'ajax_request': true,
        'get_data_row': true,
        'server': CommonParams.get('server'),
        'db': CommonParams.get('db'),
        'table': CommonParams.get('table'),
        'where_clause': data[3],
        'where_clause_sign': data[5]
      };
      $.post('index.php?route=/table/zoom-search', postParams, function (data) {
        // Row is contained in data.row_info,
        // now fill the displayResultForm with row values
        var key;
        for (key in data.row_info) {
          var $field = $('#edit_fieldID_' + fieldId);
          var $fieldNull = $('#edit_fields_null_id_' + fieldId);
          if (data.row_info[key] === null) {
            $fieldNull.prop('checked', true);
            $field.val('');
          } else {
            $fieldNull.prop('checked', false);
            if ($field.attr('multiple')) {
              // when the column is of type SET
              $field.val(data.row_info[key].split(','));
            } else {
              $field.val(data.row_info[key]);
            }
          }
          fieldId++;
        }
        selectedRow = data.row_info;
      });
      $('#dataPointModal').modal('show');
    });
  }
  $('#help_dialog').on('click', function () {
    displayHelp();
  });
});