Implement importing points.

src/main/java/net/themusicinnoise/vaccalc/PointEngine.java

@@ -1,15 +1,108 @@
 package net.themusicinnoise.vaccalc;
 
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.time.DayOfWeek;
 import java.time.LocalDate;
+import java.time.Month;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public class PointEngine {
     private double defaultPoints;
 
-    public PointEngine() {
-        defaultPoints = 1.0;
+    static private class PointRule {
+        private enum RuleType {
+            DAY_OF_WEEK,
+            MONTH,
+            DATE,
         }
 
+        static final Pattern DOW_PATTERN = Pattern.compile("dow=(sun|mon|tue|wed|thu|fri|sat) (\\d+\\.\\d+)", Pattern.CASE_INSENSITIVE);
+        static final Pattern MONTH_PATTERN = Pattern.compile("m=(jan|feb|mar|apr|may|jun|jul|aug|sep|oct|nov|dec) (\\d+\\.\\d+)", Pattern.CASE_INSENSITIVE);
+        static final Pattern DATE_PATTERN = Pattern.compile("(\\d{4}-\\d{2}-\\d{2}) (\\d+\\.\\d+)", Pattern.CASE_INSENSITIVE);
+
+        private RuleType type;
+        private DayOfWeek dow;
+        private Month mon;
+        private LocalDate date;
+        private double points;
+
+        public PointRule(String def) {
+            Matcher dowMatcher = DOW_PATTERN.matcher(def);
+            Matcher monthMatcher = MONTH_PATTERN.matcher(def);
+            Matcher dateMatcher = DATE_PATTERN.matcher(def);
+
+            if (dowMatcher.find()) {
+                this.type = RuleType.DAY_OF_WEEK;
+                this.points = Double.parseDouble(dowMatcher.group(2));
+                this.dow = DayOfWeek.from(DateTimeFormatter.ofPattern("EEE").parse(dowMatcher.group(1)));
+            } else if (monthMatcher.find()) {
+                this.type = RuleType.MONTH;
+                this.points = Double.parseDouble(monthMatcher.group(2));
+                this.mon = Month.from(DateTimeFormatter.ofPattern("MMM").parse(monthMatcher.group(1)));
+            } else if (dateMatcher.find()) {
+                this.type = RuleType.DATE;
+                this.points = Double.parseDouble(dateMatcher.group(2));
+                this.date = LocalDate.parse(dateMatcher.group(1), DateTimeFormatter.ofPattern("yyyy-MM-dd"));
+            } else {
+                throw new IllegalArgumentException("Invalid line: '" + def + "'");
+            }
+        }
+
+        public boolean applies(LocalDate date) {
+            switch (type) {
+                case DAY_OF_WEEK:
+                    return this.dow == date.getDayOfWeek();
+                case MONTH:
+                    return this.mon == date.getMonth();
+                case DATE:
+                    return this.date.isEqual(date);
+            }
+            return false;
+        }
+
+        public double getPoints() { return points; }
+    }
+    private List<PointRule> rules;
+
+    public PointEngine() {
+        defaultPoints = 1.0;
+        rules = new ArrayList<>();
+    }
+
+    public void importPointsFile(File pointsFile) {
+        Pattern defaultPattern = Pattern.compile("default (\\d+\\.\\d+)");
+
+        try (BufferedReader br = new BufferedReader(new FileReader(pointsFile))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                Matcher defaultMatcher = defaultPattern.matcher(line);
+                if (defaultMatcher.find()) {
+                    defaultPoints = Double.parseDouble(defaultMatcher.group(1));
+                } else {
+                    rules.add(new PointRule(line));
+                }
+            }
+        } catch (IOException e) {
+            throw new RuntimeException("Failed to read points file: " + pointsFile, e);
+        }
+    }
+
+    public void reset() { rules.clear(); }
+
     public double getPointsOfDay(LocalDate date) {
-        return defaultPoints;
+        double points = defaultPoints;
+        for (PointRule rule : rules) {
+            if (rule.applies(date)) {
+                points = rule.getPoints();
+            }
+        }
+        return points;
     }
 }

src/main/java/net/themusicinnoise/vaccalc/VacCalc.java

@@ -19,6 +19,26 @@ public class VacCalc extends JFrame {
 
         JMenuBar menuBar = new JMenuBar();
         JMenu appMenu = new JMenu("VacCalc");
+        JMenuItem importItem = new JMenuItem("Import points");
+        importItem.addActionListener(new ActionListener() {
+            @Override
+            public void actionPerformed(ActionEvent ev) {
+                JFileChooser fileChooser = new JFileChooser();
+                int ret = fileChooser.showOpenDialog(VacCalc.this);
+                if(ret == JFileChooser.APPROVE_OPTION) {
+                    try {
+                        pointEngine.importPointsFile(fileChooser.getSelectedFile());
+                    } catch(RuntimeException ex) {
+                        ex.printStackTrace();
+                        JOptionPane.showMessageDialog(VacCalc.this, ex.getMessage(), "Parsing Error",
+                                JOptionPane.ERROR_MESSAGE);
+                        pointEngine.reset();
+                    }
+                }
+                calendarPanel.repaint();
+            }
+        });
+        appMenu.add(importItem);
         JMenuItem exitItem = new JMenuItem("Exit");
         exitItem.addActionListener(new ActionListener() {
             @Override
@@ -110,7 +130,7 @@ public class VacCalc extends JFrame {
 
     private void updatePointsLabel() {
         double points = calendarPanel.getTotalPoints();
-        pointsLabel.setText(String.format("Total Points: %.1f", points));
+        pointsLabel.setText(String.format("Total Points: %.3f", points));
     }
 
     public static void main(String[] args) {

vac-points.txt

@@ -0,0 +1,6 @@
+default 1.0
+dow=Fri 0.825
+2026-12-24 0.5
+2026-12-31 0.5
+m=Jul 0.825
+m=Aug 0.825