// GoToSocial // Copyright (C) GoToSocial Authors admin@gotosocial.org // SPDX-License-Identifier: AGPL-3.0-or-later // // This program is free software: you can redistribute it and/or modify // it under the terms of the GNU Affero General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU Affero General Public License for more details. // // You should have received a copy of the GNU Affero General Public License // along with this program. If not, see <http://www.gnu.org/licenses/>. package text import ( "bytes" "context" "codeberg.org/gruf/go-byteutil" "github.com/superseriousbusiness/gotosocial/internal/gtsmodel" "github.com/superseriousbusiness/gotosocial/internal/log" "github.com/yuin/goldmark" "github.com/yuin/goldmark/extension" "github.com/yuin/goldmark/renderer/html" ) // FromMarkdown fulfils FormatFunc by parsing // the given markdown input into a FormatResult. func (f *Formatter) FromMarkdown( ctx context.Context, parseMention gtsmodel.ParseMentionFunc, authorID string, statusID string, input string, ) *FormatResult { result := new(FormatResult) // Instantiate goldmark parser for // markdown, using custom renderer // to add hashtag/mention links. md := goldmark.New( goldmark.WithRendererOptions( html.WithXHTML(), html.WithHardWraps(), // Allows raw HTML. We sanitize // at the end so this is OK. html.WithUnsafe(), ), goldmark.WithExtensions( &customRenderer{ ctx, f.db, parseMention, authorID, statusID, false, // emojiOnly = false. result, }, extension.Linkify, // Turns URLs into links. extension.Strikethrough, ), ) // Convert input string to bytes // without performing any allocs. bInput := byteutil.S2B(input) // Parse input into HTML. var htmlBytes bytes.Buffer if err := md.Convert( bInput, &htmlBytes, ); err != nil { log.Errorf(ctx, "error formatting markdown input to HTML: %s", err) } // Clean and shrink HTML. result.HTML = byteutil.B2S(htmlBytes.Bytes()) result.HTML = SanitizeToHTML(result.HTML) result.HTML = MinifyHTML(result.HTML) return result }