feat(log): Formatted console logging with file output

encoder.go

@@ -0,0 +1,105 @@
+package masterlog
+
+import (
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+// getShortFile extracts the filename from a full path
+func getShortFile(file string) string {
+	for i := len(file) - 1; i >= 0; i-- {
+		if file[i] == '/' {
+			return file[i+1:]
+		}
+	}
+	return file
+}
+
+// FormattedEncoder encodes entries in the formatted text format
+type FormattedEncoder struct {
+	useColors bool
+}
+
+// NewFormattedEncoder creates a new FormattedEncoder
+func NewFormattedEncoder(useColors bool) *FormattedEncoder {
+	return &FormattedEncoder{useColors: useColors}
+}
+
+func (e *FormattedEncoder) Encode(entry Entry) ([]byte, error) {
+	// Format: 2022-09-01T10:05:03+01:00 TRC main.go:23 trace message go_version=go1.19 pid=2620043
+	format := entry.Timestamp.Format(time.RFC3339)
+	levelStr := levelNames[entry.Level]
+	shortFile := getShortFile(entry.File)
+
+	var result string
+	if e.useColors {
+		// Timestamp in light gray
+		timestampColor := colorLightGray
+		// Level in its specific color
+		levelColor := levelColors[entry.Level]
+		// File:line in light gray
+		fileColor := colorLightGray
+		// Separator in light gray
+		separator := ">"
+		// Message in white
+		messageColor := colorWhite
+
+		result = fmt.Sprintf("%s%s%s %s%s%s %s%s%s:%d %s%s%s %s%s%s",
+			timestampColor, format, colorReset,
+			levelColor, levelStr, colorReset,
+			fileColor, shortFile, colorReset, entry.Line,
+			fileColor, separator, colorReset,
+			messageColor, entry.Message, colorReset)
+	} else {
+		result = fmt.Sprintf("%s %s %s:%d > %s", format, levelStr, shortFile, entry.Line, entry.Message)
+	}
+
+	// Add fields - first custom fields, then default fields
+	// Custom fields (user-provided)
+	for key, value := range entry.CustomFields {
+		if e.useColors {
+			// Field key in turquoise, value in white
+			result += fmt.Sprintf(" %s%s%s=%s%v%s", colorTurquoise, key, colorReset, colorWhite, value, colorReset)
+		} else {
+			result += fmt.Sprintf(" %s=%v", key, value)
+		}
+	}
+	// Default fields (go_version, pid)
+	for key, value := range entry.DefaultFields {
+		if e.useColors {
+			// Field key in turquoise, value in white
+			result += fmt.Sprintf(" %s%s%s=%s%v%s", colorTurquoise, key, colorReset, colorWhite, value, colorReset)
+		} else {
+			result += fmt.Sprintf(" %s=%v", key, value)
+		}
+	}
+
+	result += "\n"
+	return []byte(result), nil
+}
+
+// JSONEncoder encodes entries in JSON format
+type JSONEncoder struct{}
+
+func (e *JSONEncoder) Encode(entry Entry) ([]byte, error) {
+	type LogEntry struct {
+		Timestamp string                 `json:"timestamp"`
+		Level     string                 `json:"level"`
+		File      string                 `json:"file"`
+		Line      int                    `json:"line"`
+		Message   string                 `json:"message"`
+		Fields    map[string]interface{} `json:"fields,omitempty"`
+	}
+
+	logEntry := LogEntry{
+		Timestamp: entry.Timestamp.Format(time.RFC3339),
+		Level:     levelNames[entry.Level],
+		File:      getShortFile(entry.File),
+		Line:      entry.Line,
+		Message:   entry.Message,
+		Fields:    entry.Fields,
+	}
+
+	return json.Marshal(logEntry)
+}