Add task sidebar workflow

2026-06-24 12:28:56 +01:00
parent 45263d59f8
commit d133839194
33 changed files with 1890 additions and 134 deletions
@@ -0,0 +1,264 @@
+// Package task stores manual project-local tasks and the worktrees agents
+// register while working on those tasks.
+package task
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"time"
+)
+
+// Task is one manual project-local task.
+type Task struct {
+	ID        string     `json:"id"`
+	Title     string     `json:"title"`
+	CreatedAt string     `json:"created_at"`
+	UpdatedAt string     `json:"updated_at"`
+	Worktrees []Worktree `json:"worktrees,omitempty"`
+}
+
+// Worktree is a git worktree path registered by a task-bound agent.
+type Worktree struct {
+	Path               string `json:"path"`
+	Branch             string `json:"branch,omitempty"`
+	CreatedByProcessID string `json:"created_by_process_id,omitempty"`
+	RegisteredAt       string `json:"registered_at"`
+}
+
+// Store is one project's tasks file. Safe for concurrent use.
+type Store struct {
+	path string
+
+	mu    sync.Mutex
+	tasks map[string]Task
+	order []string
+}
+
+// Open loads or creates the task store for projectKey.
+func Open(projectKey string) (*Store, error) {
+	if projectKey == "" {
+		return nil, errors.New("task.Open: empty project key")
+	}
+	base, err := dataDir()
+	if err != nil {
+		return nil, err
+	}
+	dir := filepath.Join(base, "projects", projectKey)
+	if err := os.MkdirAll(dir, 0o700); err != nil {
+		return nil, fmt.Errorf("task: mkdir %s: %w", dir, err)
+	}
+	path := filepath.Join(dir, "tasks.json")
+	s := &Store{path: path, tasks: make(map[string]Task)}
+	if err := s.loadLocked(); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
+func dataDir() (string, error) {
+	if h := os.Getenv("XDG_DATA_HOME"); h != "" {
+		return filepath.Join(h, "patterm"), nil
+	}
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(home, ".local", "share", "patterm"), nil
+}
+
+// Path returns the on-disk file path. Used by tests and diagnostics.
+func (s *Store) Path() string { return s.path }
+
+// List returns tasks in creation order.
+func (s *Store) List() []Task {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make([]Task, 0, len(s.order))
+	for _, id := range s.order {
+		if t, ok := s.tasks[id]; ok {
+			out = append(out, cloneTask(t))
+		}
+	}
+	return out
+}
+
+// Get returns one task by id.
+func (s *Store) Get(id string) (Task, bool) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	t, ok := s.tasks[id]
+	if !ok {
+		return Task{}, false
+	}
+	return cloneTask(t), true
+}
+
+// Create inserts a new task with title.
+func (s *Store) Create(title string) (Task, error) {
+	title = strings.TrimSpace(title)
+	if title == "" {
+		return Task{}, errors.New("task.Create: empty title")
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	now := timestamp()
+	t := Task{ID: s.mintIDLocked(), Title: title, CreatedAt: now, UpdatedAt: now}
+	s.tasks[t.ID] = t
+	s.order = append(s.order, t.ID)
+	if err := s.saveLocked(); err != nil {
+		return Task{}, err
+	}
+	return cloneTask(t), nil
+}
+
+// Rename updates a task title.
+func (s *Store) Rename(id, title string) (Task, error) {
+	title = strings.TrimSpace(title)
+	if title == "" {
+		return Task{}, errors.New("task.Rename: empty title")
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	t, ok := s.tasks[id]
+	if !ok {
+		return Task{}, fmt.Errorf("task.Rename: no such task %q", id)
+	}
+	t.Title = title
+	t.UpdatedAt = timestamp()
+	s.tasks[id] = t
+	if err := s.saveLocked(); err != nil {
+		return Task{}, err
+	}
+	return cloneTask(t), nil
+}
+
+// RegisterWorktree records or updates a worktree for a task. Paths are
+// de-duplicated by cleaned absolute path.
+func (s *Store) RegisterWorktree(taskID string, wt Worktree) (Task, error) {
+	path := strings.TrimSpace(wt.Path)
+	if path == "" {
+		return Task{}, errors.New("task.RegisterWorktree: empty path")
+	}
+	if !filepath.IsAbs(path) {
+		abs, err := filepath.Abs(path)
+		if err != nil {
+			return Task{}, err
+		}
+		path = abs
+	}
+	wt.Path = filepath.Clean(path)
+	wt.Branch = strings.TrimSpace(wt.Branch)
+	if wt.RegisteredAt == "" {
+		wt.RegisteredAt = timestamp()
+	}
+
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	t, ok := s.tasks[taskID]
+	if !ok {
+		return Task{}, fmt.Errorf("task.RegisterWorktree: no such task %q", taskID)
+	}
+	replaced := false
+	for i, existing := range t.Worktrees {
+		if filepath.Clean(existing.Path) == wt.Path {
+			if wt.CreatedByProcessID == "" {
+				wt.CreatedByProcessID = existing.CreatedByProcessID
+			}
+			t.Worktrees[i] = wt
+			replaced = true
+			break
+		}
+	}
+	if !replaced {
+		t.Worktrees = append(t.Worktrees, wt)
+	}
+	t.UpdatedAt = timestamp()
+	s.tasks[taskID] = t
+	if err := s.saveLocked(); err != nil {
+		return Task{}, err
+	}
+	return cloneTask(t), nil
+}
+
+type fileShape struct {
+	Tasks []Task `json:"tasks"`
+}
+
+func (s *Store) loadLocked() error {
+	b, err := os.ReadFile(s.path)
+	if err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return nil
+		}
+		return fmt.Errorf("task: read %s: %w", s.path, err)
+	}
+	if len(b) == 0 {
+		return nil
+	}
+	var f fileShape
+	if err := json.Unmarshal(b, &f); err != nil {
+		return fmt.Errorf("task: parse %s: %w", s.path, err)
+	}
+	for _, t := range f.Tasks {
+		if t.ID == "" || strings.TrimSpace(t.Title) == "" {
+			continue
+		}
+		t.Title = strings.TrimSpace(t.Title)
+		if _, exists := s.tasks[t.ID]; !exists {
+			s.order = append(s.order, t.ID)
+		}
+		s.tasks[t.ID] = cloneTask(t)
+	}
+	return nil
+}
+
+func (s *Store) saveLocked() error {
+	out := make([]Task, 0, len(s.tasks))
+	for _, id := range s.order {
+		if t, ok := s.tasks[id]; ok {
+			out = append(out, cloneTask(t))
+		}
+	}
+	body, err := json.MarshalIndent(fileShape{Tasks: out}, "", "  ")
+	if err != nil {
+		return err
+	}
+	body = append(body, '\n')
+	tmp := s.path + ".tmp"
+	if err := os.WriteFile(tmp, body, 0o600); err != nil {
+		return fmt.Errorf("task: write %s: %w", tmp, err)
+	}
+	if err := os.Rename(tmp, s.path); err != nil {
+		return fmt.Errorf("task: rename %s: %w", s.path, err)
+	}
+	return nil
+}
+
+func (s *Store) mintIDLocked() string {
+	for {
+		var b [4]byte
+		if _, err := rand.Read(b[:]); err != nil {
+			return fmt.Sprintf("task_%d", time.Now().UnixNano())
+		}
+		id := "task_" + hex.EncodeToString(b[:])
+		if _, exists := s.tasks[id]; !exists {
+			return id
+		}
+	}
+}
+
+func cloneTask(t Task) Task {
+	if t.Worktrees != nil {
+		t.Worktrees = append([]Worktree(nil), t.Worktrees...)
+	}
+	return t
+}
+
+func timestamp() string { return time.Now().UTC().Format(time.RFC3339) }