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