v0.13.1 folder restructure, test script added, format adapter async fix

internal/source/source.go

@@ -0,0 +1,62 @@
+package source
+
+import (
+	"strings"
+	"time"
+
+	"logwisp/internal/core"
+)
+
+// Source represents an input data stream for log entries
+type Source interface {
+	// Capabilities returns a slice of supported Source capabilities
+	Capabilities() []core.Capability
+
+	// Subscribe returns a channel that receives log entries from the source
+	Subscribe() <-chan core.LogEntry
+
+	// Start begins reading from the source
+	Start() error
+
+	// Stop gracefully shuts down the source
+	Stop()
+
+	// SourceStats contains statistics about a source
+	GetStats() SourceStats
+}
+
+// SourceStats contains statistics about a source
+type SourceStats struct {
+	ID             string
+	Type           string
+	TotalEntries   uint64
+	DroppedEntries uint64
+	StartTime      time.Time
+	LastEntryTime  time.Time
+	Details        map[string]any
+}
+
+// ExtractLogLevel heuristically determines the log level from a line of text
+func ExtractLogLevel(line string) string {
+	patterns := []struct {
+		patterns []string
+		level    string
+	}{
+		{[]string{"[ERROR]", "ERROR:", " ERROR ", "ERR:", "[ERR]", "FATAL:", "[FATAL]"}, "ERROR"},
+		{[]string{"[WARN]", "WARN:", " WARN ", "WARNING:", "[WARNING]"}, "WARN"},
+		{[]string{"[INFO]", "INFO:", " INFO ", "[INF]", "INF:"}, "INFO"},
+		{[]string{"[DEBUG]", "DEBUG:", " DEBUG ", "[DBG]", "DBG:"}, "DEBUG"},
+		{[]string{"[TRACE]", "TRACE:", " TRACE "}, "TRACE"},
+	}
+
+	upperLine := strings.ToUpper(line)
+	for _, group := range patterns {
+		for _, pattern := range group.patterns {
+			if strings.Contains(upperLine, pattern) {
+				return group.level
+			}
+		}
+	}
+
+	return ""
+}