Added median issue age feature.

src/org/april/agirstatool/core/AgirStatoolUtils.java

@@ -198,6 +198,42 @@ public class AgirStatoolUtils
 		return result;
 	}
 
+	/**
+	 * Builds the week median ages.
+	 *
+	 * @param project
+	 *            the project
+	 * @param start
+	 *            the start
+	 * @param end
+	 *            the end
+	 * @return the string list
+	 */
+	public static StringList buildWeekMedianAges(final Project project, final LocalDate start, final LocalDate end)
+	{
+		StringList result;
+
+		result = new StringList();
+
+		if (start != null)
+		{
+			LocalDate date = AgirStatoolUtils.normaliseWeekDate(start);
+			LocalDate normalizedEnd = AgirStatoolUtils.normaliseWeekDate(end);
+			while (date.isBefore(normalizedEnd) || date.isEqual(normalizedEnd))
+			{
+				double stat = project.issues().extractActivedAt(date).computeMedian(date);
+
+				result.add(String.valueOf(stat));
+
+				//
+				date = date.plusWeeks(1);
+			}
+		}
+
+		//
+		return result;
+	}
+
 	/**
 	 * Builds the week min ages.
 	 *

src/org/april/agirstatool/core/Issues.java

@@ -47,6 +47,30 @@ public class Issues extends ArrayList<Issue>
 		super(capacity);
 	}
 
+	/**
+	 * Compute median.
+	 *
+	 * @param date
+	 *            the date
+	 * @return the double
+	 */
+	public double computeMedian(final LocalDate date)
+	{
+		double result;
+
+		LongList values = new LongList();
+		for (Issue issue : this)
+		{
+			int age = issue.getAgeInDays(date);
+			values.add(Long.valueOf(age));
+		}
+
+		result = values.median();
+
+		//
+		return result;
+	}
+
 	/**
 	 * Compute stat.
 	 *

src/org/april/agirstatool/core/LongList.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 Christian Pierre MOMON <christian.momon@devinsy.fr>
+ * 
+ * This file is part of AgirStatool, simple key value database.
+ * 
+ * AgirStatool is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ * 
+ * AgirStatool is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with AgirStatool.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.april.agirstatool.core;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+/**
+ * The Class LongList.
+ */
+public class LongList extends ArrayList<Long>
+{
+	private static final long serialVersionUID = 2724688980125113107L;
+
+	/**
+	 * Instantiates a new stat.
+	 */
+	public LongList()
+	{
+		super();
+	}
+
+	/**
+	 * Median.
+	 *
+	 * @return the double
+	 */
+	public double median()
+	{
+		double result;
+
+		sort();
+
+		if (this.isEmpty())
+		{
+			result = 0;
+		}
+		else if (this.size() % 2 == 0)
+		{
+			long a = get(this.size() / 2 - 1);
+			long b = get(this.size() / 2);
+			result = (a + b) / 2;
+		}
+		else
+		{
+			result = get(this.size() / 2);
+		}
+
+		//
+		return result;
+	}
+
+	/**
+	 * Sort.
+	 */
+	public void sort()
+	{
+		Collections.sort(this);
+	}
+}

src/org/april/agirstatool/core/pages/IssueAgeChartView.java

@@ -78,6 +78,9 @@ public class IssueAgeChartView
 				values = AgirStatoolUtils.buildWeekMaxAges(project, start, end);
 				code = code.replaceAll("data  : \\[.*\\]", "data: " + AgirStatoolUtils.toJSonNumbers(labels, values));
 
+				values = AgirStatoolUtils.buildWeekMedianAges(project, start, end);
+				code = code.replaceAll("data   : \\[.*\\]", "data: " + AgirStatoolUtils.toJSonNumbers(labels, values));
+
 				result = code.toString();
 			}
 			else

src/org/april/agirstatool/core/pages/issueAgeChartView.xhtml

@@ -38,7 +38,18 @@ var myChart = new Chart(ctx,
 	            backgroundColor: 'rgba(75, 192, 192, 0.2)',
 	            borderColor: 'rgba(75, 192, 192, 1)',
 	            borderWidth: 1,
-	            fill: +2,
+	            fill: +3,
+	            cubicInterpolationMode: 'monotone',
+	            lineTension: 0,
+	            pointBorderWidth: 0.00000001,
+	            data : [1, 5, 9, 13, 15, 22],
+        	},
+        	{
+	            label: 'median',
+	            backgroundColor: 'rgba(54, 162, 235, 0.2)',
+	            borderColor: 'rgba(54, 162, 235, 1)',
+	            borderWidth: 1,
+	            fill: false,
 	            cubicInterpolationMode: 'monotone',
  	            lineTension: 0,
 	            pointBorderWidth: 0.00000001,

src/org/april/agirstatool/core/pages/project.xhtml

@@ -81,7 +81,7 @@
 				<div id="unassignedGroupedChart" style="width: 360px; height: 200px; display: none;"></div>
 				<div id="createdClosedChartMini" style="width: 220px; height: 200px; display: inline-block;">CREATED/CLOSED CHART MINI</div>
 				<div id="created-ClosedChartMini" style="width: 220px; height: 200px; display: inline-block;">CREATED-CLOSED CHART MINI</div>
-				<div id="ageChartMini" style="width: 250px; height: 200px; display: inline-block;">CREATED-CLOSED MONTHS CHART MINI</div>
+				<div id="ageChartMini" style="width: 220px; height: 200px; display: inline-block;">CREATED-CLOSED MONTHS CHART MINI</div>
 		</div>
 		<br/>
 		<div id="tableView">