diff_formatter.go RawHistoryFolder

1package config
2
3import (
4	"fmt"
5	"strings"
6
7	"github.com/bnema/dumber/internal/application/port"
8)
9
10// ConfigDiffFormatter implements port.DiffFormatter for formatting config changes.
11type ConfigDiffFormatter struct{}
12
13// NewDiffFormatter creates a new ConfigDiffFormatter.
14func NewDiffFormatter() *ConfigDiffFormatter {
15	return &ConfigDiffFormatter{}
16}
17
18// FormatChangesAsDiff returns changes formatted as a diff for display.
19func (*ConfigDiffFormatter) FormatChangesAsDiff(changes []port.KeyChange) string {
20	if len(changes) == 0 {
21		return "No changes detected."
22	}
23
24	var sb strings.Builder
25	sb.WriteString("Config migration changes:\n\n")
26
27	for _, change := range changes {
28		switch change.Type {
29		case port.KeyChangeAdded:
30			sb.WriteString(fmt.Sprintf("  + %s = %s\n", change.NewKey, change.NewValue))
31		case port.KeyChangeRemoved:
32			sb.WriteString(fmt.Sprintf("  - %s = %s (deprecated)\n", change.OldKey, change.OldValue))
33		case port.KeyChangeRenamed:
34			sb.WriteString(fmt.Sprintf("  ~ %s -> %s\n", change.OldKey, change.NewKey))
35			sb.WriteString(fmt.Sprintf("    (value: %s)\n", change.OldValue))
36		}
37	}
38
39	return sb.String()
40}