From bc5d2312763b4399b246f1e6b9dbfbfa5cd76686 Mon Sep 17 00:00:00 2001
From: Fuwn <contact@fuwn.me>
Date: Thu, 12 May 2022 07:42:03 +0000
Subject: feat(0.1.0): initial release

---
 src/convert/html.rs     | 75 +++++++++++++++++++++++++++++++++++++++++++++++
 src/convert/markdown.rs | 77 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 src/convert/html.rs
 create mode 100644 src/convert/markdown.rs

(limited to 'src/convert')

diff --git a/src/convert/html.rs b/src/convert/html.rs
new file mode 100644
index 0000000..18aec1e
--- /dev/null
+++ b/src/convert/html.rs
@@ -0,0 +1,75 @@
+// This file is part of Germ <https://github.com/gemrest/germ>.
+// Copyright (C) 2022-2022 Fuwn <contact@fuwn.me>
+//
+// 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 <contact@fuwn.me>
+// SPDX-License-Identifier: GPL-3.0-only
+
+use crate::ast::Node;
+
+pub fn convert(source: Vec<Node>) -> String {
+  let mut html = 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) => html.push_str(&format!("<p>{}</p>", text)),
+      Node::Link {
+        to,
+        text,
+      } => {
+        html.push_str(&format!(
+          "<a href=\"{}\">{}</a><br>",
+          to,
+          text.unwrap_or(to.clone())
+        ));
+      }
+      Node::Heading {
+        level,
+        text,
+      } => {
+        html.push_str(&format!(
+          "<{}>{}</{0}>",
+          match level {
+            1 => "h1",
+            2 => "h2",
+            3 => "h3",
+            _ => "p",
+          },
+          text
+        ));
+      }
+      Node::List(items) =>
+        html.push_str(&format!(
+          "<ul>{}</ul>",
+          items
+            .into_iter()
+            .map(|i| format!("<li>{}</li>", i))
+            .collect::<Vec<String>>()
+            .join("\n")
+        )),
+      Node::Blockquote(text) =>
+        html.push_str(&format!("<blockquote>{}</blockquote>", text)),
+      Node::PreformattedText {
+        text, ..
+      } => {
+        html.push_str(&format!("<pre>{}</pre>", text));
+      }
+      _ => {}
+    }
+  }
+
+  html
+}
diff --git a/src/convert/markdown.rs b/src/convert/markdown.rs
new file mode 100644
index 0000000..e9855a2
--- /dev/null
+++ b/src/convert/markdown.rs
@@ -0,0 +1,77 @@
+// This file is part of Germ <https://github.com/gemrest/germ>.
+// Copyright (C) 2022-2022 Fuwn <contact@fuwn.me>
+//
+// 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 <contact@fuwn.me>
+// 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(&text),
+      Node::Link {
+        to,
+        text,
+      } =>
+        markdown.push_str(&if let Some(text) = text {
+          format!("[{}]({})", text, to)
+        } else {
+          format!("<{}>", to)
+        }),
+      Node::Heading {
+        level,
+        text,
+      } => {
+        markdown.push_str(&format!(
+          "{} {}",
+          match level {
+            1 => "#",
+            2 => "##",
+            3 => "###",
+            _ => "",
+          },
+          text
+        ));
+      }
+      Node::List(items) =>
+        markdown.push_str(
+          &items
+            .into_iter()
+            .map(|i| format!("- {}", i))
+            .collect::<Vec<String>>()
+            .join("\n"),
+        ),
+      Node::Blockquote(text) => markdown.push_str(&format!("> {}", text)),
+      Node::PreformattedText {
+        alt_text,
+        text,
+      } => {
+        markdown.push_str(&format!(
+          "```{}\n{}\n```",
+          alt_text.unwrap_or("".to_string()),
+          text
+        ));
+      }
+      Node::Whitespace => markdown.push('\n'),
+    }
+  }
+
+  markdown
+}
-- 
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