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| package main
import (
"fmt"
"html"
"net/url"
"path/filepath"
"strings"
"mime"
"git.sr.ht/~adnano/go-gemini"
)
type ConvertedGmiDoc struct {
Content string
Title string
}
func textToHTML(reqUrl *url.URL, text gemini.Text) ConvertedGmiDoc {
var b strings.Builder
var pre bool
var blockquote bool
var list bool
var title string
for _, l := range text {
if _, ok := l.(gemini.LineQuote); ok {
if !blockquote {
blockquote = true
fmt.Fprintf(&b, "<blockquote>\n")
}
} else if blockquote {
blockquote = false
fmt.Fprintf(&b, "</blockquote>\n")
}
if _, ok := l.(gemini.LineListItem); ok {
if !list {
list = true
fmt.Fprint(&b, "<ul>\n")
}
} else if list {
list = false
fmt.Fprint(&b, "</ul>\n")
}
switch l.(type) {
case gemini.LineLink:
link := l.(gemini.LineLink)
urlstring := html.EscapeString(link.URL)
// u = ctx.URL.ResolveReference(u) ?
u, err := url.Parse(urlstring)
if err != nil {
continue
}
if reqUrl != nil {
u = reqUrl.ResolveReference(u)
}
if u.Scheme == "gemini" || (reqUrl != nil && u.Scheme == "") {
if strings.HasSuffix(u.Host, c.Host) {
u.Scheme = ""
urlstring = html.EscapeString(u.String())
} else {
// TODO make configurable
u.Path = fmt.Sprintf("gemini/%s%s", u.Host, u.Path)
u.Scheme = ""
u.Host = "portal.mozz.us"
urlstring = html.EscapeString(u.String())
}
}
name := html.EscapeString(link.Name)
if name == "" {
name = urlstring
}
// embed images
if strings.HasPrefix(mime.TypeByExtension(filepath.Ext(u.Path)), "image") {
fmt.Fprintf(&b, "<p><img src='%s' alt='%s'></p>\n", urlstring, name)
} else {
fmt.Fprintf(&b, "<p><a href='%s'>%s</a></p>\n", urlstring, name)
}
case gemini.LinePreformattingToggle:
pre = !pre
if pre {
altText := string(l.(gemini.LinePreformattingToggle))
if altText != "" {
altText = html.EscapeString(altText)
fmt.Fprintf(&b, "<pre title='%s'>\n", altText)
} else {
fmt.Fprint(&b, "<pre>\n")
}
} else {
fmt.Fprint(&b, "</pre>\n")
}
case gemini.LinePreformattedText:
text := string(l.(gemini.LinePreformattedText))
fmt.Fprintf(&b, "%s\n", html.EscapeString(text))
case gemini.LineHeading1:
text := html.EscapeString(string(l.(gemini.LineHeading1)))
fmt.Fprintf(&b, "<h1 id='%s'>%s</h1>\n", text, text)
if title == "" {
title = text
} // TODO deal with repetition
case gemini.LineHeading2:
text := html.EscapeString(string(l.(gemini.LineHeading2)))
fmt.Fprintf(&b, "<h2 id='%s'>%s</h2>\n", text, text)
if title == "" {
title = text
}
case gemini.LineHeading3:
text := html.EscapeString(string(l.(gemini.LineHeading3)))
fmt.Fprintf(&b, "<h3 id='%s'>%s</h3>\n", text, text)
if title == "" {
title = text
}
case gemini.LineListItem:
text := string(l.(gemini.LineListItem))
fmt.Fprintf(&b, "<li>%s</li>\n", html.EscapeString(text))
case gemini.LineQuote:
text := string(l.(gemini.LineQuote))
fmt.Fprintf(&b, "<p>%s</p>\n", html.EscapeString(text))
case gemini.LineText:
text := string(l.(gemini.LineText))
if text == "" {
fmt.Fprint(&b, "<br>\n")
} else {
fmt.Fprintf(&b, "<p>%s</p>\n", html.EscapeString(text))
}
}
}
if pre {
fmt.Fprint(&b, "</pre>\n")
}
if list {
fmt.Fprint(&b, "</ul>\n")
}
if blockquote {
fmt.Fprint(&b, "</blockquote>\n")
}
return ConvertedGmiDoc{
b.String(),
title,
}
}
|
