feat(tasks): define status graph and progress

2026-08-14 23:31:50 +07:00
parent 5967f7f70d
commit 17a3c5dc70
4 changed files with 193 additions and 0 deletions
@@ -0,0 +1,40 @@
+package com.lab.labtimesheet.tasks;
+
+import java.util.Collection;
+import java.util.OptionalDouble;
+
+public record TaskProgress(int todo, int inProgress, int blocked, int done) {
+
+    public static TaskProgress from(Collection<TaskStatus> statuses) {
+        int todo = 0;
+        int inProgress = 0;
+        int blocked = 0;
+        int done = 0;
+        for (TaskStatus status : statuses) {
+            switch (status) {
+                case TODO -> todo++;
+                case IN_PROGRESS -> inProgress++;
+                case BLOCKED -> blocked++;
+                case DONE -> done++;
+            }
+        }
+        return new TaskProgress(todo, inProgress, blocked, done);
+    }
+
+    public int total() {
+        return todo + inProgress + blocked + done;
+    }
+
+    public int count(TaskStatus status) {
+        return switch (status) {
+            case TODO -> todo;
+            case IN_PROGRESS -> inProgress;
+            case BLOCKED -> blocked;
+            case DONE -> done;
+        };
+    }
+
+    public OptionalDouble completionPercentage() {
+        return total() == 0 ? OptionalDouble.empty() : OptionalDouble.of(done * 100.0 / total());
+    }
+}
@@ -0,0 +1,17 @@
+package com.lab.labtimesheet.tasks;
+
+public enum TaskStatus {
+    TODO,
+    IN_PROGRESS,
+    BLOCKED,
+    DONE;
+
+    public boolean canTransitionTo(TaskStatus target) {
+        return switch (this) {
+            case TODO -> target == IN_PROGRESS || target == BLOCKED;
+            case IN_PROGRESS -> target == DONE || target == BLOCKED;
+            case BLOCKED -> target == TODO || target == IN_PROGRESS;
+            case DONE -> target == IN_PROGRESS;
+        };
+    }
+}