feat: articles format option with markdown new default

internal/infrastructure/markdown/jsonBlocks.go

@@ -0,0 +1,111 @@
+package markdown
+
+import (
+	"bytes"
+	"encoding/json"
+	"strings"
+)
+
+type jsonMark struct {
+	Type string `json:"type"`
+	Href string `json:"href,omitempty"`
+}
+
+type jsonText struct {
+	Type  string     `json:"type"`
+	Text  string     `json:"text"`
+	Marks []jsonMark `json:"marks"`
+}
+
+type jsonHeading struct {
+	Type     string     `json:"type"`
+	Level    int        `json:"level"`
+	Align    string     `json:"align,omitempty"`
+	Children []jsonText `json:"children"`
+}
+
+type jsonParagraph struct {
+	Type     string     `json:"type"`
+	Align    string     `json:"align,omitempty"`
+	Children []jsonText `json:"children"`
+}
+
+type jsonList struct {
+	Type    string  `json:"type"`
+	Ordered bool    `json:"ordered"`
+	Items   [][]any `json:"items"`
+}
+
+type jsonBlockquote struct {
+	Type     string `json:"type"`
+	Children []any  `json:"children"`
+}
+
+type jsonCode struct {
+	Type     string `json:"type"`
+	Language string `json:"language"`
+	Text     string `json:"text"`
+}
+
+type jsonRule struct {
+	Type string `json:"type"`
+}
+
+type jsonImage struct {
+	Type string `json:"type"`
+	Src  string `json:"src"`
+	Alt  string `json:"alt"`
+}
+
+func renderJSON(blocks []block) (string, error) {
+	var buffer bytes.Buffer
+	encoder := json.NewEncoder(&buffer)
+	encoder.SetEscapeHTML(false)
+	if err := encoder.Encode(toJSONBlocks(blocks)); err != nil {
+		return "", err
+	}
+	return strings.TrimSuffix(buffer.String(), "\n"), nil
+}
+
+func toJSONBlocks(blocks []block) []any {
+	result := make([]any, 0, len(blocks))
+	for _, b := range blocks {
+		result = append(result, toJSONBlock(b))
+	}
+	return result
+}
+
+func toJSONBlock(b block) any {
+	switch b.kind {
+	case kindHeading:
+		return jsonHeading{Type: "heading", Level: b.level, Align: b.align, Children: toJSONTexts(b.inlines)}
+	case kindParagraph:
+		return jsonParagraph{Type: "paragraph", Align: b.align, Children: toJSONTexts(b.inlines)}
+	case kindList:
+		items := make([][]any, 0, len(b.items))
+		for _, item := range b.items {
+			items = append(items, toJSONBlocks(item))
+		}
+		return jsonList{Type: "list", Ordered: b.ordered, Items: items}
+	case kindBlockquote:
+		return jsonBlockquote{Type: "blockquote", Children: toJSONBlocks(b.children)}
+	case kindCode:
+		return jsonCode{Type: "code", Language: b.language, Text: b.text}
+	case kindImage:
+		return jsonImage{Type: "image", Src: b.src, Alt: b.alt}
+	}
+	return jsonRule{Type: "hr"}
+}
+
+func toJSONTexts(inlines []inline) []jsonText {
+	plain := withoutCodeMarks(inlines)
+	texts := make([]jsonText, 0, len(plain))
+	for _, item := range plain {
+		marks := make([]jsonMark, 0, len(item.marks))
+		for _, m := range item.marks {
+			marks = append(marks, jsonMark{Type: m.kind, Href: m.href})
+		}
+		texts = append(texts, jsonText{Type: "text", Text: item.text, Marks: marks})
+	}
+	return texts
+}