🏷️ Created HTML domain

go.mod

@@ -1,3 +1,5 @@
 module source.toby3d.me/toby3d/jf2
 
 go 1.21.4
+
+require golang.org/x/net v0.18.0 // indirect

go.sum

@@ -0,0 +1,2 @@
+golang.org/x/net v0.18.0 h1:mIYleuAkSbHh0tCv7RvjL3F6ZVbLjq4+R7zbOn3Kokg=
+golang.org/x/net v0.18.0/go.mod h1:/czyP5RqHAH4odGYxBJ1qz0+CE5WZ+2j1YgoEo8F2jQ=

html.go

@@ -0,0 +1,71 @@
+package jf2
+
+import (
+	"bytes"
+	"fmt"
+	"html"
+	"io"
+	"strconv"
+	"strings"
+
+	nethtml "golang.org/x/net/html"
+)
+
+// HTML is the text/html version of the containing object.
+type HTML struct {
+	node  *nethtml.Node
+	value string
+}
+
+func NewHTML(r io.Reader) (*HTML, error) {
+	value, err := io.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("cannot read r HTML value as string: %w", err)
+	}
+
+	node, err := nethtml.Parse(bytes.NewReader(value))
+	if err != nil {
+		return nil, fmt.Errorf("cannot parse r as HTML: %w", err)
+	}
+
+	return &HTML{
+		node:  node,
+		value: string(value),
+	}, nil
+}
+
+func (h *HTML) UnmarshalJSON(v []byte) error {
+	unquoted, err := strconv.Unquote(string(v))
+	if err != nil {
+		return fmt.Errorf("JF2: HTML: cannot unquote value: %w", err)
+	}
+
+	parsed, err := NewHTML(strings.NewReader(html.UnescapeString(unquoted)))
+	if err != nil {
+		return fmt.Errorf("JF2: HTML: cannot parse value as HTML node: %w", err)
+	}
+
+	*h = *parsed
+
+	return nil
+}
+
+func (h HTML) MarshalJSON() ([]byte, error) {
+	if h.value != "" {
+		return []byte(strconv.Quote(h.value)), nil
+	}
+
+	return nil, nil
+}
+
+func (h HTML) GoString() string {
+	return "jf2.HTML(" + h.String() + ")"
+}
+
+func (h HTML) String() string {
+	if h.value != "" {
+		return h.value
+	}
+
+	return "und"
+}

html_test.go

@@ -0,0 +1,54 @@
+package jf2_test
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+
+	"source.toby3d.me/toby3d/jf2"
+)
+
+func TestHTML_UnmarshalJSON(t *testing.T) {
+	t.Parallel()
+
+	v := new(struct {
+		Content struct {
+			HTML jf2.HTML `json:"html"`
+		} `json:"content"`
+	})
+	if err := json.Unmarshal([]byte(`{"content":{"html":"<p>Hello World</p>"}}`), v); err != nil {
+		t.Fatal(err)
+	}
+
+	expect, err := jf2.NewHTML(strings.NewReader(`<p>Hello World</p>`))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if v.Content.HTML.String() != expect.String() {
+		t.Errorf("got '%s', want '%s'", v.Content.HTML, *expect)
+	}
+}
+
+func TestHTML_MarshalJSON(t *testing.T) {
+	t.Parallel()
+
+	v, err := jf2.NewHTML(strings.NewReader(`<p>Hello World</p>`))
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	body, err := json.Marshal(struct {
+		Content *jf2.HTML `json:"content"`
+	}{
+		Content: v,
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	const expect string = `{"content":"\u003cp\u003eHello World\u003c/p\u003e"}`
+	if actual := string(body); actual != expect {
+		t.Errorf("got '%s', want '%s'", actual, expect)
+	}
+}