test(nest): live-model crow delivery in the nest; ReadEvents log helper (#13)

flightlog.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"os"
 	"path/filepath"
+	"strings"
 	"sync"
 	"time"
 )
@@ -55,3 +56,23 @@ func (l *FlightLog) Write(e Event) {
 }
 
 func (l *FlightLog) Close() error { return l.f.Close() }
+
+// ReadEvents parses a flight log file back into events, in the order written.
+func ReadEvents(path string) ([]Event, error) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	var out []Event
+	for _, line := range strings.Split(string(data), "\n") {
+		if strings.TrimSpace(line) == "" {
+			continue
+		}
+		var e Event
+		if err := json.Unmarshal([]byte(line), &e); err != nil {
+			return nil, err
+		}
+		out = append(out, e)
+	}
+	return out, nil
+}