feat: add HideString

strutil/string.go

@@ -501,3 +501,30 @@ func Trim(str string, characterMask ...string) string {
 
 	return strings.Trim(str, trimChars)
 }
+
+// HideString hide some chars in source string with param `replaceChar`.
+// replace range is origin[start : end]. [start, end)
+// Play: todo
+func HideString(origin string, start, end int, replaceChar string) string {
+	size := len(origin)
+
+	if start > size-1 || start < 0 || end < 0 || start > end {
+		return origin
+	}
+
+	if end > size {
+		end = size
+	}
+
+	if replaceChar == "" {
+		return origin
+	}
+
+	startStr := origin[0:start]
+	endStr := origin[end:size]
+
+	replaceSize := end - start
+	replaceStr := strings.Repeat(replaceChar, replaceSize)
+
+	return startStr + replaceStr + endStr
+}

strutil/string_example_test.go

@@ -571,3 +571,23 @@ func ExampleSplitAndTrim() {
 	// [a b c d $1]
 	// [a b c d 1]
 }
+
+func ExampleHideString() {
+	str := "13242658976"
+
+	result1 := HideString(str, 3, 3, "*")
+	result2 := HideString(str, 3, 4, "*")
+	result3 := HideString(str, 3, 7, "*")
+	result4 := HideString(str, 7, 11, "*")
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+	fmt.Println(result3)
+	fmt.Println(result4)
+
+	// Output:
+	// 13242658976
+	// 132*2658976
+	// 132****8976
+	// 1324265****
+}

strutil/string_test.go

@@ -432,3 +432,21 @@ func TestSplitAndTrim(t *testing.T) {
 	assert.Equal([]string{"a", "b", "c", "d", "$1"}, result1)
 	assert.Equal([]string{"a", "b", "c", "d", "1"}, result2)
 }
+
+func TestHideString(t *testing.T) {
+	assert := internal.NewAssert(t, "TestTrim")
+
+	str := "13242658976"
+
+	assert.Equal("13242658976", HideString(str, 0, -1, "*"))
+	assert.Equal("13242658976", HideString(str, 0, 0, "*"))
+	assert.Equal("****2658976", HideString(str, 0, 4, "*"))
+
+	assert.Equal("13242658976", HideString(str, 3, 3, "*"))
+	assert.Equal("132*2658976", HideString(str, 3, 4, "*"))
+	assert.Equal("132****8976", HideString(str, 3, 7, "*"))
+	assert.Equal("1324265****", HideString(str, 7, 11, "*"))
+
+	assert.Equal("1324265****", HideString(str, 7, 100, "*"))
+	assert.Equal("13242658976", HideString(str, 100, 100, "*"))
+}