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// This file is part of Germ <https://github.com/gemrest/germ>.
// Copyright (C) 2022-2022 Fuwn <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3.
//
// 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
// General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// Copyright (C) 2022-2022 Fuwn <[email protected]>
// SPDX-License-Identifier: GPL-3.0-only
use crate::ast::Node;
pub fn convert(source: Vec<Node>) -> String {
let mut markdown = String::new();
// Since we have an AST tree of the Gemtext, it is very easy to convert from
// this AST tree to an alternative markup format.
for node in source {
match node {
Node::Text(text) => markdown.push_str(&format!("{}\n", text)),
Node::Link {
to,
text,
} =>
markdown.push_str(&*text.map_or_else(
|| format!("<{}>\n", to),
|text| format!("[{}]({})\n", text, to),
)),
Node::Heading {
level,
text,
} => {
markdown.push_str(&format!(
"{} {}\n",
match level {
1 => "#",
2 => "##",
3 => "###",
_ => "",
},
text
));
}
Node::List(items) =>
markdown.push_str(&format!("{}\n",
items
.into_iter()
.map(|i| format!("- {}", i))
.collect::<Vec<String>>()
.join("\n"),),
),
Node::Blockquote(text) => markdown.push_str(&format!("> {}\n", text)),
Node::PreformattedText {
alt_text,
text,
} => {
markdown.push_str(&format!(
"```{}\n{}```\n",
alt_text.unwrap_or_else(|| "".to_string()),
text
));
}
Node::Whitespace => markdown.push_str("\n\n"),
}
}
markdown
}
|