init commit

internal/service/monitor.go

@@ -0,0 +1,113 @@
+package service
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/yeho/klp/internal/clipboard"
+	"github.com/yeho/klp/internal/config"
+	"github.com/yeho/klp/internal/database"
+)
+
+type Monitor struct {
+	cfg       *config.Config
+	db        *database.Database
+	clipboard clipboard.Clipboard
+}
+
+func NewMonitor(cfg *config.Config, db *database.Database) (*Monitor, error) {
+	clip, err := clipboard.New()
+	if err != nil {
+		return nil, fmt.Errorf("failed to initialize clipboard: %w", err)
+	}
+
+	return &Monitor{
+		cfg:       cfg,
+		db:        db,
+		clipboard: clip,
+	}, nil
+}
+
+func (m *Monitor) Run() error {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	// Handle shutdown signals
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGTERM, syscall.SIGINT)
+
+	go func() {
+		<-sigChan
+		fmt.Println("\nShutting down...")
+		cancel()
+	}()
+
+	fmt.Println("Clipboard monitor started. Press Ctrl+C to stop.")
+
+	changes := m.clipboard.Watch(ctx)
+	for {
+		select {
+		case <-ctx.Done():
+			return nil
+		case content, ok := <-changes:
+			if !ok {
+				return nil
+			}
+			if err := m.handleChange(content); err != nil {
+				fmt.Fprintf(os.Stderr, "Error handling clipboard change: %v\n", err)
+			}
+		}
+	}
+}
+
+func (m *Monitor) handleChange(content string) error {
+	// Skip empty content
+	if content == "" {
+		return nil
+	}
+
+	// Check max entry size if configured
+	if m.cfg.MaxEntrySize > 0 && len(content) > m.cfg.MaxEntrySize {
+		return nil
+	}
+
+	// Skip if duplicate of most recent entry
+	recent := m.db.MostRecent()
+	if recent != nil && recent.Value == content {
+		return nil
+	}
+
+	// Add to database
+	entry, err := m.db.Add(content)
+	if err != nil {
+		return err
+	}
+
+	// Log the addition (truncate for display)
+	preview := content
+	if len(preview) > 50 {
+		preview = preview[:50] + "..."
+	}
+	// Replace newlines for cleaner display
+	preview = replaceNewlines(preview)
+	fmt.Printf("Added [%s]: %s\n", entry.ID, preview)
+
+	return nil
+}
+
+func replaceNewlines(s string) string {
+	result := make([]byte, 0, len(s))
+	for i := 0; i < len(s); i++ {
+		if s[i] == '\n' {
+			result = append(result, ' ')
+		} else if s[i] == '\r' {
+			// skip
+		} else {
+			result = append(result, s[i])
+		}
+	}
+	return string(result)
+}