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[chore] Text formatting overhaul (#1406)

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* Implement goldmark debug print for hashtags and mentions

* Minify HTML in FromPlain

* Convert plaintext status parser to goldmark

* Move mention/tag/emoji finding logic into formatter

* Combine mention and hashtag boundary characters

* Normalize unicode when rendering hashtags
This commit is contained in:
Autumn!
2023-02-03 10:58:58 +00:00
committed by GitHub
parent 271da016b9
commit 49beb17a8f
26 changed files with 826 additions and 1314 deletions
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54
internal/text/markdown.go
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@@ -21,32 +21,19 @@ package text
import (
"bytes"
"context"
"strings"
"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
"github.com/superseriousbusiness/gotosocial/internal/log"
"github.com/tdewolff/minify/v2"
minifyHtml "github.com/tdewolff/minify/v2/html"
"github.com/yuin/goldmark"
"github.com/yuin/goldmark/extension"
"github.com/yuin/goldmark/renderer/html"
)
var (
m *minify.M
)
func (f *formatter) FromMarkdown(ctx context.Context, markdownText string, mentions []*gtsmodel.Mention, tags []*gtsmodel.Tag, emojis []*gtsmodel.Emoji) string {
// Temporarily replace all found emoji shortcodes in the markdown text with
// their ID so that they're not parsed as anything by the markdown parser -
// this fixes cases where emojis with some underscores in them are parsed as
// words with emphasis, eg `:_some_emoji:` becomes `:<em>some</em>emoji:`
//
// Since the IDs of the emojis are just uppercase letters + numbers they should
// be safe to pass through the markdown parser without unexpected effects.
for _, e := range emojis {
markdownText = strings.ReplaceAll(markdownText, ":"+e.Shortcode+":", ":"+e.ID+":")
func (f *formatter) FromMarkdown(ctx context.Context, pmf gtsmodel.ParseMentionFunc, authorID string, statusID string, markdownText string) *FormatResult {
result := &FormatResult{
Mentions: []*gtsmodel.Mention{},
Tags: []*gtsmodel.Tag{},
Emojis: []*gtsmodel.Emoji{},
}
// parse markdown text into html, using custom renderer to add hashtag/mention links
@@ -57,7 +44,7 @@ func (f *formatter) FromMarkdown(ctx context.Context, markdownText string, menti
html.WithUnsafe(), // allows raw HTML
),
goldmark.WithExtensions(
&customRenderer{f, ctx, mentions, tags},
&customRenderer{f, ctx, pmf, authorID, statusID, false, result},
extension.Linkify, // turns URLs into links
extension.Strikethrough,
),
@@ -66,30 +53,15 @@ func (f *formatter) FromMarkdown(ctx context.Context, markdownText string, menti
var htmlContentBytes bytes.Buffer
err := md.Convert([]byte(markdownText), &htmlContentBytes)
if err != nil {
log.Errorf("error rendering markdown to HTML: %s", err)
log.Errorf("error formatting markdown to HTML: %s", err)
}
htmlContent := htmlContentBytes.String()
result.HTML = htmlContentBytes.String()
// Replace emoji IDs in the parsed html content with their shortcodes again
for _, e := range emojis {
htmlContent = strings.ReplaceAll(htmlContent, ":"+e.ID+":", ":"+e.Shortcode+":")
}
// clean anything dangerous out of the HTML
result.HTML = SanitizeHTML(result.HTML)
// clean anything dangerous out of the html
htmlContent = SanitizeHTML(htmlContent)
// shrink ray
result.HTML = minifyHTML(result.HTML)
if m == nil {
m = minify.New()
m.Add("text/html", &minifyHtml.Minifier{
KeepEndTags: true,
KeepQuotes: true,
})
}
minified, err := m.String("text/html", htmlContent)
if err != nil {
log.Errorf("error minifying markdown text: %s", err)
}
return minified
return result
}