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[feature] Allow anchor href to work for footnotes, use ID prefix to avoid clashes (#4298)

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Updates markdown parser + sanitizer to allow footnote anchors to work properly, with appropriate roles. Footnote anchor IDs and backrefs use the status ID as a prefix to avoid clashes, so that footnotes don't break when multiple footnoted statuses are rendered on the same page (eg., in a thread or on the account's home page).

closes https://codeberg.org/superseriousbusiness/gotosocial/issues/4296

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4298
Co-authored-by: tobi <tobi.smethurst@protonmail.com>
Co-committed-by: tobi <tobi.smethurst@protonmail.com>
This commit is contained in:
tobi 2025-06-30 12:56:50 +02:00 • committed by kim
commit 5fbaf5b7be
3 changed files with 38 additions and 5 deletions
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9
internal/text/markdown_test.go
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@ -61,7 +61,9 @@ const (
mdCodeBlockWithNewlines = "some code coming up\n\n```\n\n\n\n```\nthat was some code"
mdCodeBlockWithNewlinesExpected = "<p>some code coming up</p><pre><code>\n\n\n</code></pre><p>that was some code</p>"
mdWithFootnote = "fox mulder,fbi.[^1]\n\n[^1]: federated bureau of investigation"
mdWithFootnoteExpected = "<p>fox mulder,fbi.<sup id=\"fnref:1\"><a class=\"footnote-ref\">1</a></sup></p><div><hr><ol><li id=\"fn:1\"><p>federated bureau of investigation <a class=\"footnote-backref\">↩︎</a></p></li></ol></div>"
mdWithFootnoteExpected = "<p>fox mulder,fbi.<sup id=\"dummy_status_ID-fnref:1\"><a href=\"#dummy_status_ID-fn:1\" class=\"footnote-ref\" role=\"doc-noteref\">1</a></sup></p><div><hr><ol><li id=\"dummy_status_ID-fn:1\"><p>federated bureau of investigation <a href=\"#dummy_status_ID-fnref:1\" class=\"footnote-backref\" role=\"doc-backlink\">↩︎</a></p></li></ol></div>"
mdWithAttemptedRelative = "hello this is a cheeky relative link: <a href=\"../sneaky.html\">click it!</a>"
mdWithAttemptedRelativeExpected = "<p>hello this is a cheeky relative link: click it!</p>"
mdWithBlockQuote = "get ready, there's a block quote coming:\n\n>line1\n>line2\n>\n>line3\n\n"
mdWithBlockQuoteExpected = "<p>get ready, there's a block quote coming:</p><blockquote><p>line1<br>line2</p><p>line3</p></blockquote>"
mdHashtagAndCodeBlock = "#Hashtag\n\n```\n#Hashtag\n```"
@ -156,6 +158,11 @@ func (suite *MarkdownTestSuite) TestParseWithFootnote() {
suite.Equal(mdWithFootnoteExpected, formatted.HTML)
}
func (suite *MarkdownTestSuite) TestParseWithAttemptedRelative() {
formatted := suite.FromMarkdown(mdWithAttemptedRelative)
suite.Equal(mdWithAttemptedRelativeExpected, formatted.HTML)
}
func (suite *MarkdownTestSuite) TestParseWithBlockquote() {
formatted := suite.FromMarkdown(mdWithBlockQuote)
suite.Equal(mdWithBlockQuoteExpected, formatted.HTML)