v1.0.0: here we go again

internal/types/header.go

@@ -0,0 +1,49 @@
+package types
+
+import "strings"
+
+type Header KeyValue[string, []string]
+
+type Headers []Header
+
+func (headers Headers) Has(key string) bool {
+	for i := range headers {
+		if headers[i].Key == key {
+			return true
+		}
+	}
+	return false
+}
+
+func (headers Headers) GetValue(key string) *[]string {
+	for i := range headers {
+		if headers[i].Key == key {
+			return &headers[i].Value
+		}
+	}
+	return nil
+}
+
+func (headers *Headers) Append(header ...Header) {
+	for _, h := range header {
+		if item := headers.GetValue(h.Key); item != nil {
+			*item = append(*item, h.Value...)
+		} else {
+			*headers = append(*headers, h)
+		}
+	}
+}
+
+func (headers *Headers) Parse(rawValues ...string) {
+	for _, rawValue := range rawValues {
+		headers.Append(*ParseHeader(rawValue))
+	}
+}
+
+func ParseHeader(rawValue string) *Header {
+	parts := strings.SplitN(rawValue, ": ", 2)
+	if len(parts) == 1 {
+		return &Header{Key: parts[0], Value: []string{""}}
+	}
+	return &Header{Key: parts[0], Value: []string{parts[1]}}
+}