feat: add pandoc

internal/lib/pandoc.go

@@ -0,0 +1,61 @@
+package lib
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"net/http"
+)
+
+type PandocClient struct {
+	client  *http.Client
+	address string
+}
+
+func NewPandocClient(client *http.Client, address string) *PandocClient {
+	return &PandocClient{
+		client:  client,
+		address: address,
+	}
+}
+
+type convertRequest struct {
+	Text string `json:"text"`
+	From string `json:"from"`
+	To   string `json:"to"`
+}
+
+func (client *PandocClient) convert(text, from, to string) (string, error) {
+	body, err := json.Marshal(convertRequest{
+		Text: text,
+		From: from,
+		To:   to,
+	})
+	if err != nil {
+		return "", err
+	}
+
+	buf := bytes.NewBuffer(body)
+
+	resp, err := client.client.Post(client.address, "application/json", buf)
+	if err != nil {
+		return "", err
+	}
+
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", err
+	}
+
+	body, err = io.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+
+	return string(body), nil
+}
+
+func (client *PandocClient) ConvertLatexToHtml5(text string) (string, error) {
+	return client.convert(text, "latex", "html5")
+}