Open issues with average

function formatWeek(d){
    if (d instanceof Date)
    {
      // Copy date so original doesn't get modified
      d = new Date(Date.UTC(d.getFullYear(), d.getMonth(), d.getDate()));
       
      // Set to nearest Thursday: current date + 4 - current day number
      // Make Sunday's day number 7
      d.setUTCDate(d.getUTCDate() + 4 - (d.getUTCDay()||7));
       
      // Get first day of year
      var yearStart = new Date(Date.UTC(d.getUTCFullYear(),0,1));
       
      // Calculate full weeks to nearest Thursday
      var weekNo = Math.ceil(( ( (d - yearStart) / 86400000) + 1)/7);
       
      // Return array of year and week number
      return [d.getUTCFullYear(), weekNo];
    }
    return '';
}
 
function formatTooltipAsHours(value, ratio, id, index)
{
    return value.toFixed(2) + ' h';
}
  
function formatQuarter(d)
{
    if (d instanceof Date)
    {
        var q = d.getMonth();
        q = parseInt(q / 3) + 1;
        return 'Q' + q;
    }
    return '';
}
  
function formatHalfyear(d)
{
    if (d instanceof Date)
    {
        var q = d.getMonth();
        q = parseInt(q / 6) + 1;
        return 'H' + q;
    }
    return '';
}
  
chartData.types = { "Weekly average" : "line" };
  
var c3arg = {
    data: chartData,
    grid: {
        y: {
            show: true
        },
        x: {
            show: true
        }
    },
    axis: {
        x: {
            type: 'timeseries',
            label: {
                text: chartData.custom.xLabel,
                position: 'outer-left'
            },
            tick: {
               
                format: eval(chartData.custom.xTickFormat),
                culling: {
                    max: 25
                },
                fit: true,
                multiline: false
            }
        },
        y: {
            label: chartData.ytype
        }
    }
};
  
if (chartData.custom && chartData.custom.tooltip)
{
    var tooltipFunction = eval(chartData.custom.tooltip);
    c3arg.tooltip = {
        format: {
            value: tooltipFunction
        }
    };
}
  
if ( chartData.custom && chartData.custom.gauge_max)
{
    c3arg.gauge = {
        max: parseFloat(chartData.custom.gauge_max)
    };
}
  
c3.generate(c3arg);

import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
  
import org.apache.log4j.Logger;
import org.apache.lucene.document.Document;
  
import com.atlassian.jira.component.ComponentAccessor;
import com.atlassian.jira.issue.DocumentIssueImpl;
import com.atlassian.jira.issue.Issue;
import com.atlassian.jira.jql.parser.JqlParseException;
import com.atlassian.jira.jql.parser.JqlQueryParser;
import com.atlassian.query.Query;
import com.decadis.jira.xchart.api.ChartParam;
import com.decadis.jira.xchart.api.model.Period;
import com.decadis.jira.xchart.api.util.DateUtils;
import com.decadis.jira.xchart.grouping.GroupValueExtractor;
import com.decadis.jira.xchart.grouping.GroupValueExtractorFactory;
import com.decadis.jira.xchart.model.ChartData;
import com.decadis.jira.xchart.model.MetaCountGroup;
import com.decadis.jira.xchart.templates.TemplateConstants;
import com.decadis.jira.xchart.utils.ChartUtilsImpl;
import com.decadis.jira.xchart.utils.DateUtilsImpl;
import java.io.IOException;
import java.util.Collections;
import com.atlassian.adapter.jackson.ObjectMapper;
import com.atlassian.jira.user.ApplicationUser;
import com.atlassian.jira.util.I18nHelper;
import com.atlassian.jira.util.IOUtil;
import com.decadis.jira.xchart.api.Chart;
import com.decadis.jira.xchart.api.util.ChartBuilder;
import com.decadis.jira.xchart.api.util.FilterUtils;
import com.decadis.jira.xchart.impl.ChartBuilderImpl;
import com.decadis.jira.xchart.utils.FilterUtilsImpl;
  
Logger logger = Logger.getLogger("Unresolved incl. average - xChart");
JqlQueryParser jqlQueryParser = ComponentAccessor.getComponent(JqlQueryParser.class);
Query query = jqlQueryParser.parseQuery(Jql_Param);
I18nHelper i18n = ComponentAccessor.getJiraAuthenticationContext().getI18nHelper();
logger.debug("JQL=" + Jql_Param);
  
try
{
    query;
} catch (JqlParseException e)
{
  logger.warn("Bad JQL:" + jql, e);
  throw new IllegalArgumentException("Bad JQL: " + jql);
}
  
Period selectedPeriod = Period.fromString(Period_Param);
logger.debug("Period=" + selectedPeriod);
  
MetaCountGroup countGroup = new MetaCountGroup();
DateUtils dateUtils = new DateUtilsImpl(ComponentAccessor.getJiraAuthenticationContext().getLocale());
GroupValueExtractor groupValueExtractor = GroupValueExtractorFactory.Create("issuetype");
Field documentField;
HashMap map = new HashMap();
  
documentField = DocumentIssueImpl.class.getDeclaredField("document");
documentField.setAccessible(true);
  
for ( Issue issue : new FilterUtilsImpl().performSearch(query, user) )
{
   for ( String group : groupValueExtractor.getGroups((Document) documentField.get(issue)) )
   {
      String periodName = dateUtils.getPeriodGroup(issue.getCreated(), selectedPeriod);
      if(map.get(periodName)) {
         BigDecimal a = map.get(periodName);
         a = a.add(BigDecimal.ONE);
         map.put(periodName,a);
      } else {
         map.put(periodName,BigDecimal.ONE);
      }
         group = groupValueExtractor.getResolvedValue(group, issue);
         countGroup.addValue(BigDecimal.ONE, group, periodName);
      }
}
  
for(Entry e : map.entrySet()){
    countGroup.addValue(getAverage(e.getKey(),e.getValue()),"Weekly average",e.getKey())
}
//countGroup.fillMissingValues();
countGroup.accumulateGroups();
  
ChartData chartData = new ChartData(i18n.getText("common.concepts.issues"));
chartData.setxFormat(DateUtils.SimpleDateFormatD3);
chartData.setPeriod(selectedPeriod);
chartData.setType("bar");
  
ChartUtilsImpl.TransformResult(countGroup, chartData);
return chartData;
  
BigDecimal getAverage(String period, BigDecimal value){
    double daysInMonth = getDaysInMonth(DateUtils.SimpleDateFormat.parse(period));
    double weeks = daysInMonth / 7;
    double average = value.doubleValue() / weeks;
    return BigDecimal.valueOf(average).setScale(2,1);
}
  
  
int getDaysInMonth(Date d){
  // Create a calendar object and set year and month
  Calendar mycal = new GregorianCalendar(d.getYear(),d.getMonth(),d.getDay());
  
  // Get the number of days in that month
  int daysInMonth = mycal.getActualMaximum(Calendar.DAY_OF_MONTH);
  return (double)daysInMonth;
}