ssm-browse: added structed log view

internal/slog-view/services/logreader/logreader.go

@@ -0,0 +1,44 @@
+package logreader
+
+import (
+	"bufio"
+	"encoding/json"
+	"github.com/lmika/awstools/internal/slog-view/models"
+	"github.com/pkg/errors"
+	"log"
+	"os"
+)
+
+type Service struct {
+}
+
+func NewService() *Service {
+	return &Service{}
+}
+
+func (s *Service) Open(filename string) (*models.LogFile, error) {
+	f, err := os.Open(filename)
+	if err != nil {
+		return nil, errors.Wrapf(err, "cannot open file: %v", filename)
+	}
+	defer f.Close()
+
+	var lines []models.LogLine
+	scanner := bufio.NewScanner(f)
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		var data interface{}
+		if err := json.Unmarshal([]byte(line), &data); err != nil {
+			log.Println("invalid json line: %v", err)
+			continue
+		}
+
+		lines = append(lines, models.LogLine{JSON: data})
+	}
+	if scanner.Err() != nil {
+		return nil, errors.Wrapf(err, "unable to scan file: %v", filename)
+	}
+
+	return &models.LogFile{Lines: lines}, nil
+}