feat: add header case

cmd/tagliatelle/tagliatelle.go

@@ -8,11 +8,12 @@ import (
 func main() {
 	cfg := tagliatelle.Config{
 		Rules: map[string]string{
-			"json": "camel",
-			"yaml": "camel",
-			"xml":  "camel",
-			"bson": "camel",
-			"avro": "snake",
+			"json":   "camel",
+			"yaml":   "camel",
+			"xml":    "camel",
+			"bson":   "camel",
+			"avro":   "snake",
+			"header": "header",
 		},
 		UseFieldName: true,
 	}

readme.md

@@ -15,6 +15,7 @@ Supported string casing:
 - `goPascal` Respects [Go's common initialisms](https://github.com/golang/lint/blob/83fdc39ff7b56453e3793356bcff3070b9b96445/lint.go#L770-L809) (e.g. HttpResponse -> HTTPResponse).
 - `goKebab` Respects [Go's common initialisms](https://github.com/golang/lint/blob/83fdc39ff7b56453e3793356bcff3070b9b96445/lint.go#L770-L809) (e.g. HttpResponse -> HTTPResponse).
 - `goSnake` Respects [Go's common initialisms](https://github.com/golang/lint/blob/83fdc39ff7b56453e3793356bcff3070b9b96445/lint.go#L770-L809) (e.g. HttpResponse -> HTTPResponse).
+- `header`
 - `upper`
 - `lower`
 
@@ -70,6 +71,19 @@ Supported string casing:
 | NameJSON       | name-json        | name-JSON        |
 | UneTête        | une-tête         | une-tête         |
 
+| Source         | Header Case      |
+|----------------|------------------|
+| GooID          | Goo-Id           |
+| HTTPStatusCode | Http-Status-Code |
+| FooBAR         | Foo-Bar          |
+| URL            | Url              |
+| ID             | Id               |
+| hostIP         | Host-Ip          |
+| JSON           | Json             |
+| JSONName       | Json-Name        |
+| NameJSON       | Name-Json        |
+| UneTête        | Une-Tête         |
+
 ## Examples
 
 ```go
@@ -130,9 +144,10 @@ Here are the default rules for the well known and used tags, when using tagliate
 
 - `json`: `camel`
 - `yaml`: `camel`
-- `xml`:  `camel`
+- `xml`: `camel`
 - `bson`: `camel`
 - `avro`: `snake`
+- `header`: `header`
 
 ### Custom Rules
 

tagliatelle.go

@@ -200,6 +200,8 @@ func getConverter(c string) (func(s string) string, error) {
 		return strcase.ToGoKebab, nil
 	case "goSnake":
 		return strcase.ToGoSnake, nil
+	case "header":
+		return toHeader, nil
 	case "upper":
 		return strings.ToUpper, nil
 	case "lower":
@@ -208,3 +210,7 @@ func getConverter(c string) (func(s string) string, error) {
 		return nil, fmt.Errorf("unsupported case: %s", c)
 	}
 }
+
+func toHeader(s string) string {
+	return strcase.ToCase(s, strcase.TitleCase, '-')
+}

tagliatelle_test.go

@@ -18,6 +18,7 @@ func TestAnalyzer(t *testing.T) {
 			"bson":         "camel",
 			"avro":         "snake",
 			"mapstructure": "kebab",
+			"header":       "header",
 		},
 		UseFieldName: true,
 	}

testdata/src/a/sample.go

@@ -25,11 +25,13 @@ type Bir struct {
 }
 
 type Bur struct {
-	Name    string
-	Value   string `yaml:"Value"` // want `yaml\(camel\): got 'Value' want 'value'`
-	More    string `json:"-"`
-	Also    string `json:",omitempty"` // want `json\(camel\): got 'Also' want 'also'`
-	ReqPerS string `avro:"req_per_s"`
+	Name             string
+	Value            string `yaml:"Value"` // want `yaml\(camel\): got 'Value' want 'value'`
+	More             string `json:"-"`
+	Also             string `json:",omitempty"` // want `json\(camel\): got 'Also' want 'also'`
+	ReqPerS          string `avro:"req_per_s"`
+	HeaderValue      string `header:"Header-Value"`
+	WrongHeaderValue string `header:"Header_Value"` // want `header\(header\): got 'Header_Value' want 'Wrong-Header-Value'`
 }
 
 type Quux struct {