feat: Implement initial Go backend and React frontend project structure for the gotail application.

backend/internal/models/models.go

@@ -0,0 +1,64 @@
+package models
+
+import (
+	"regexp"
+	"strings"
+	"time"
+)
+
+// LogEntry representa uma linha de log com metadados extraídos
+type LogEntry struct {
+	Filename  string    `json:"filename"`
+	Line      string    `json:"line"`
+	Timestamp time.Time `json:"timestamp,omitempty"`
+	Level     string    `json:"level,omitempty"`
+}
+
+var (
+	// Regex para extrair timestamps em diferentes formatos
+	timestampRegex1 = regexp.MustCompile(`\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}`)
+	timestampRegex2 = regexp.MustCompile(`\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}`)
+
+	// Regex para extrair nível de log
+	logLevelRegex = regexp.MustCompile(`(?i)\b(DEBUG|INFO|WARN|WARNING|ERROR|FATAL|TRACE)\b`)
+)
+
+// NewLogEntry cria uma nova entrada de log com parsing automático de timestamp e nível
+func NewLogEntry(filename, line string) LogEntry {
+	entry := LogEntry{
+		Filename: filename,
+		Line:     strings.TrimRight(line, "\r\n"),
+	}
+
+	// Extrair timestamp
+	if ts := timestampRegex1.FindString(line); ts != "" {
+		if parsed, err := time.Parse("2006-01-02T15:04:05", ts); err == nil {
+			entry.Timestamp = parsed
+		}
+	} else if ts := timestampRegex2.FindString(line); ts != "" {
+		if parsed, err := time.Parse("2006-01-02 15:04:05", ts); err == nil {
+			entry.Timestamp = parsed
+		}
+	}
+
+	// Extrair nível de log
+	if level := logLevelRegex.FindString(line); level != "" {
+		entry.Level = strings.ToUpper(level)
+	}
+
+	return entry
+}
+
+// TimestampString retorna o timestamp como string no formato original
+// Retorna string vazia se não houver timestamp
+func (e LogEntry) TimestampString() string {
+	if e.Timestamp.IsZero() {
+		return ""
+	}
+
+	// Tentar detectar o formato original da linha
+	if strings.Contains(e.Line, "T") {
+		return e.Timestamp.Format("2006-01-02T15:04:05")
+	}
+	return e.Timestamp.Format("2006-01-02 15:04:05")
+}