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ignore multiple chars in snake_case #32

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merged 1 commit into from
Jul 12, 2021
Merged

ignore multiple chars in snake_case #32

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17 changes: 9 additions & 8 deletions snake.go
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Original file line number Diff line number Diff line change
Expand Up @@ -34,13 +34,13 @@ func ToSnake(s string) string {
return ToDelimited(s, '_')
}

func ToSnakeWithIgnore(s string, ignore uint8) string {
func ToSnakeWithIgnore(s string, ignore string) string {
return ToScreamingDelimited(s, '_', ignore, false)
}

// ToScreamingSnake converts a string to SCREAMING_SNAKE_CASE
func ToScreamingSnake(s string) string {
return ToScreamingDelimited(s, '_', 0, true)
return ToScreamingDelimited(s, '_', "", true)
}

// ToKebab converts a string to kebab-case
Expand All @@ -50,20 +50,20 @@ func ToKebab(s string) string {

// ToScreamingKebab converts a string to SCREAMING-KEBAB-CASE
func ToScreamingKebab(s string) string {
return ToScreamingDelimited(s, '-', 0, true)
return ToScreamingDelimited(s, '-', "", true)
}

// ToDelimited converts a string to delimited.snake.case
// (in this case `delimiter = '.'`)
func ToDelimited(s string, delimiter uint8) string {
return ToScreamingDelimited(s, delimiter, 0, false)
return ToScreamingDelimited(s, delimiter, "", false)
}

// ToScreamingDelimited converts a string to SCREAMING.DELIMITED.SNAKE.CASE
// (in this case `delimiter = '.'; screaming = true`)
// or delimited.snake.case
// (in this case `delimiter = '.'; screaming = false`)
func ToScreamingDelimited(s string, delimiter uint8, ignore uint8, screaming bool) string {
func ToScreamingDelimited(s string, delimiter uint8, ignore string, screaming bool) string {
s = strings.TrimSpace(s)
n := strings.Builder{}
n.Grow(len(s) + 2) // nominal 2 bytes of extra space for inserted delimiters
Expand All @@ -87,7 +87,8 @@ func ToScreamingDelimited(s string, delimiter uint8, ignore uint8, screaming boo
nextIsNum := next >= '0' && next <= '9'
// add underscore if next letter case type is changed
if (vIsCap && (nextIsLow || nextIsNum)) || (vIsLow && (nextIsCap || nextIsNum)) || (vIsNum && (nextIsCap || nextIsLow)) {
if prevIgnore := ignore > 0 && i > 0 && s[i-1] == ignore; !prevIgnore {
prevIgnore := ignore != "" && i > 0 && strings.ContainsAny(string(s[i-1]), ignore)
if !prevIgnore {
if vIsCap && nextIsLow {
if prevIsCap := i > 0 && s[i-1] >= 'A' && s[i-1] <= 'Z'; prevIsCap {
n.WriteByte(delimiter)
Expand All @@ -102,8 +103,8 @@ func ToScreamingDelimited(s string, delimiter uint8, ignore uint8, screaming boo
}
}

if (v == ' ' || v == '_' || v == '-') && uint8(v) != ignore {
// replace space/underscore/hyphen with delimiter
if (v == ' ' || v == '_' || v == '-' || v == '.') && !strings.ContainsAny(string(v), ignore) {
// replace space/underscore/hyphen/dot with delimiter
n.WriteByte(delimiter)
} else {
n.WriteByte(v)
Expand Down
12 changes: 7 additions & 5 deletions snake_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -92,14 +92,16 @@ func toSnakeWithIgnore(tb testing.TB) {
{"JSONData", "json_data"},
{"AwesomeActivity.UserID", "awesome_activity.user_id", "."},
{"AwesomeActivity.User.Id", "awesome_activity.user.id", "."},
{"AwesomeUsername@Awesome.Com", "awesome_username@awesome.com", "@"},
{"AwesomeUsername@Awesome.Com", "awesome_username@awesome.com", ".@"},
{"lets-ignore all.of dots-and-dashes", "lets-ignore_all.of_dots-and-dashes", ".-"},
}
for _, i := range cases {
in := i[0]
out := i[1]
var ignore uint8
var ignore string
ignore = ""
if len(i) == 3 {
ignore = i[2][0]
ignore = i[2]
}
result := ToSnakeWithIgnore(in, ignore)
if result != out {
Expand Down Expand Up @@ -222,7 +224,7 @@ func toScreamingDelimited(tb testing.TB) {
for _, i := range cases {
in := i[0]
out := i[1]
result := ToScreamingDelimited(in, '.', 0, true)
result := ToScreamingDelimited(in, '.', "", true)
if result != out {
tb.Errorf("%q (%q != %q)", in, result, out)
}
Expand All @@ -244,7 +246,7 @@ func toScreamingDelimitedWithIgnore(tb testing.TB) {
out := i[1]
delimiter := i[2][0]
ignore := i[3][0]
result := ToScreamingDelimited(in, delimiter, ignore, true)
result := ToScreamingDelimited(in, delimiter, string(ignore), true)
if result != out {
istr := ""
if len(i) == 4 {
Expand Down