1package i18n
 2
 3import (
 4	"fmt"
 5	"strings"
 6)
 7
 8// Interpolate replaces placeholders in a template string with values from data.
 9// Supports {key} syntax for variable interpolation.
10func Interpolate(template string, data map[string]interface{}) string {
11	if len(data) == 0 {
12		return template
13	}
14
15	result := template
16	for key, value := range data {
17		placeholder := "{" + key + "}"
18		replacement := formatValue(value)
19		result = strings.ReplaceAll(result, placeholder, replacement)
20	}
21
22	return result
23}
24
25// formatValue converts a value to its string representation.
26func formatValue(v interface{}) string {
27	if v == nil {
28		return ""
29	}
30
31	switch val := v.(type) {
32	case string:
33		return val
34	case int:
35		return fmt.Sprintf("%d", val)
36	case int64:
37		return fmt.Sprintf("%d", val)
38	case float64:
39		return fmt.Sprintf("%g", val)
40	case bool:
41		return fmt.Sprintf("%t", val)
42	default:
43		return fmt.Sprintf("%v", val)
44	}
45}