feat: add task store

src/tasks.js

@@ -0,0 +1,59 @@
+import crypto from 'node:crypto';
+import { addEvent } from './state.js';
+
+export function ensureTaskStore(state) {
+  state.tasks ??= [];
+  state.currentTaskId ??= null;
+  return state.tasks;
+}
+
+export function startTask(state, title) {
+  ensureTaskStore(state);
+  const cleanTitle = String(title || '').trim();
+  if (!cleanTitle) throw new Error('Task title is required.');
+
+  const task = {
+    id: `task_${crypto.randomUUID().slice(0, 8)}`,
+    title: cleanTitle,
+    status: 'active',
+    startedAt: new Date().toISOString(),
+    completedAt: null,
+    cancelledAt: null,
+    xpAwarded: 0
+  };
+
+  state.tasks.unshift(task);
+  state.currentTaskId = task.id;
+  addEvent(state, 'task_started', { id: task.id, title: task.title });
+  return task;
+}
+
+export function getCurrentTask(state) {
+  ensureTaskStore(state);
+  return state.tasks.find((task) => task.id === state.currentTaskId && task.status === 'active') ?? null;
+}
+
+export function completeCurrentTask(state) {
+  const task = getCurrentTask(state);
+  if (!task) return null;
+  task.status = 'done';
+  task.completedAt = new Date().toISOString();
+  state.currentTaskId = null;
+  addEvent(state, 'task_done', { id: task.id, title: task.title });
+  return task;
+}
+
+export function cancelCurrentTask(state) {
+  const task = getCurrentTask(state);
+  if (!task) return null;
+  task.status = 'cancelled';
+  task.cancelledAt = new Date().toISOString();
+  state.currentTaskId = null;
+  addEvent(state, 'task_cancelled', { id: task.id, title: task.title });
+  return task;
+}
+
+export function recentTasks(state, limit = 10) {
+  ensureTaskStore(state);
+  return state.tasks.slice(0, limit);
+}