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internal/engine/logger.go

@@ -0,0 +1,45 @@
+package engine
+
+import (
+	"fmt"
+	"sync"
+	"time"
+)
+
+type LogEntry struct {
+	ID      int64  `json:"id"`
+	Time    string `json:"time"`
+	Level   string `json:"level"`
+	Message string `json:"message"`
+}
+
+type Logger struct {
+	mu      sync.Mutex
+	nextID  int64
+	entries []LogEntry
+}
+
+func NewLogger() *Logger { return &Logger{} }
+
+func (l *Logger) Add(level, format string, args ...any) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	l.nextID++
+	entry := LogEntry{ID: l.nextID, Time: time.Now().Format("15:04:05"), Level: level, Message: fmt.Sprintf(format, args...)}
+	l.entries = append(l.entries, entry)
+	if len(l.entries) > 600 {
+		l.entries = l.entries[len(l.entries)-600:]
+	}
+}
+
+func (l *Logger) Since(id int64) []LogEntry {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	out := make([]LogEntry, 0)
+	for _, e := range l.entries {
+		if e.ID > id {
+			out = append(out, e)
+		}
+	}
+	return out
+}