initial commit

2025-12-17 04:20:59 +01:00 · 2025-10-15 00:54:19 +02:00
parent 97c7383cf1
commit 0d4c44ee11
14 changed files with 1242 additions and 0 deletions
--- a/pkg/epub/ncx.go
+++ b/pkg/epub/ncx.go
@@ -0,0 +1,71 @@
+package epub
+
+import (
+	"encoding/xml"
+	"regexp"
+	"strings"
+)
+
+var (
+	cleantitle    = regexp.MustCompile(`(?s)<head>.*</head>`)
+	cleanmarkup   = regexp.MustCompile(`<[^<>]+>`)
+	cleanentities = regexp.MustCompile(`&.+;`)
+	cleancomments = regexp.MustCompile(`/*.*/`)
+	cleanspace    = regexp.MustCompile(`^\s*`)
+	cleanh1       = regexp.MustCompile(`<h[1-6].*</h[1-6]>`)
+)
+
+// Ncx OPS/toc.ncx
+type Ncx struct {
+	Points []*NavPoint `xml:"navMap>navPoint" json:"points"`
+}
+
+// NavPoint nav point
+type NavPoint struct {
+	Text    string     `xml:"navLabel>text" json:"text"`
+	Content Content    `xml:"content" json:"content"`
+	Points  []NavPoint `xml:"navPoint" json:"points"`
+}
+
+type Title struct {
+	Content string `xml:"head>title"`
+}
+
+// Content nav-point content
+type Content struct {
+	Src   string `xml:"src,attr" json:"src"`
+	Empty bool
+	Body  string
+	Title string
+	XML   []byte
+}
+
+func (c *Content) String(content []byte) error {
+	title := Title{}
+
+	err := xml.Unmarshal(content, &title)
+	if err != nil {
+		if !strings.HasPrefix(err.Error(), "XML syntax error") {
+			return err
+		}
+	}
+
+	c.Title = title.Content
+
+	txt := cleantitle.ReplaceAllString(string(content), "")
+	txt = cleanh1.ReplaceAllString(txt, "")
+	txt = cleanmarkup.ReplaceAllString(txt, "")
+	txt = cleanentities.ReplaceAllString(txt, " ")
+	txt = cleancomments.ReplaceAllString(txt, "")
+
+	txt = strings.TrimSpace(txt)
+
+	c.Body = cleanspace.ReplaceAllString(txt, "")
+	c.XML = content
+
+	if len(c.Body) == 0 {
+		c.Empty = true
+	}
+
+	return nil
+}