left-hand side currencies

core/util/utils.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"net/http"
 	"regexp"
+	"slices"
 	"strings"
 	"sync/atomic"
 	"time"
@@ -45,6 +46,8 @@ var (
 	}
 )
 
+var lHSCurrencies = []string{"pen"}
+
 var defaultCurrencies = map[string]string{
 	"rub": "₽",
 	"uah": "₴",
@@ -271,6 +274,11 @@ func DefaultCurrencies() map[string]string {
 	return defaultCurrencies
 }
 
+// LHSCurrencies will return left-hand side currencies.
+func LHSCurrencies() []string {
+	return lHSCurrencies
+}
+
 // GetCurrencySymbol returns currency symbol by it's ISO 4127 code.
 // It returns provided currency code in uppercase if currency symbol cannot be found.
 func GetCurrencySymbol(code string) string {
@@ -281,6 +289,13 @@ func GetCurrencySymbol(code string) string {
 	return strings.ToUpper(code)
 }
 
+// GetCurrencySymbolPosition returns currency symbol position.
+// true - left-hand side,
+// (default) false - right-hand side.
+func GetCurrencySymbolPosition(code string) bool {
+	return slices.Contains(LHSCurrencies(), strings.ToLower(code))
+}
+
 func FormatCurrencyValue(value float32) string {
 	return fmt.Sprintf("%.2f", value)
 }

core/util/utils_test.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"errors"
 	"net/http"
+	"slices"
 	"strings"
 	"testing"
 	"time"
@@ -320,6 +321,19 @@ func TestUtils_GetCurrencySymbol(t *testing.T) {
 	assert.Equal(t, "MXN", GetCurrencySymbol("mxn"))
 }
 
+func TestUtils_GetCurrencySymbolPosition(t *testing.T) {
+	for code := range DefaultCurrencies() {
+		if slices.Contains(LHSCurrencies(), strings.ToLower(code)) {
+			assert.True(t, GetCurrencySymbolPosition(code))
+			continue
+		}
+
+		assert.False(t, GetCurrencySymbolPosition(code))
+	}
+
+	assert.False(t, GetCurrencySymbolPosition("extra_code"))
+}
+
 func TestUtils_ReplaceMarkdownSymbols(t *testing.T) {
 	test := "this *is* _test_ `string` [markdown"
 	expected := "this \\*is\\* \\_test\\_ \\`string\\` \\[markdown"