planting a seed

2023-08-17 21:59:56 +02:00 · 2023-08-17 21:59:56 +02:00 · e69dcdc197
commit e69dcdc197
11 changed files with 561 additions and 0 deletions
--- a/crates/treehouse-incubator/Cargo.toml
+++ b/crates/treehouse-incubator/Cargo.toml
@ -0,0 +1,11 @@
+[package]
+name = "treehouse-incubator"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+handlebars = "4.3.7"
+pulldown-cmark = { version = "0.9.3", default-features = false }
+thiserror = "1.0.47"
+treehouse-format = { workspace = true }
+
--- a/crates/treehouse-incubator/src/main.rs
+++ b/crates/treehouse-incubator/src/main.rs
@ -0,0 +1,45 @@
+use tree_html::HtmlGenerator;
+
+mod tree_html;
+
+#[derive(Debug, thiserror::Error)]
+enum Error {
+    #[error("I/O error: {0}")]
+    Io(#[from] std::io::Error),
+
+    #[error("treehouse parsing error: {0}")]
+    Parse(#[from] treehouse_format::ParseError),
+}
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let _ = std::fs::remove_dir_all("target/site");
+    std::fs::create_dir_all("target/site")?;
+
+    let root_file = std::fs::read_to_string("content/tree/root.tree")?;
+
+    let mut parser = treehouse_format::Parser {
+        input: &root_file,
+        position: 0,
+    };
+    let mut generator = HtmlGenerator::default();
+    while let Some(branch) = parser.next_branch()? {
+        for _ in 0..branch.indent_level {
+            print!(" ");
+        }
+        println!(
+            "{} {:?}",
+            branch.kind.char(),
+            &root_file[branch.content.clone()]
+        );
+        generator.add(&root_file, &branch);
+    }
+    std::fs::write(
+        "target/site/index.html",
+        format!(
+            "<!DOCTYPE html><html><head></head><body>{}</body></html>",
+            generator.finish()
+        ),
+    )?;
+
+    Ok(())
+}
--- a/crates/treehouse-incubator/src/tree_html.rs
+++ b/crates/treehouse-incubator/src/tree_html.rs
@ -0,0 +1,30 @@
+use treehouse_format::Branch;
+
+#[derive(Debug, Clone, Default)]
+pub struct HtmlGenerator {
+    buffer: String,
+    indent_level_stack: Vec<usize>,
+}
+
+impl HtmlGenerator {
+    pub fn add(&mut self, source: &str, branch: &Branch) {
+        if Some(&branch.indent_level) > self.indent_level_stack.last() {
+            self.indent_level_stack.push(branch.indent_level);
+            self.buffer.push_str("<ul>");
+        }
+        while Some(&branch.indent_level) < self.indent_level_stack.last() {
+            self.indent_level_stack.pop();
+            self.buffer.push_str("</ul>");
+        }
+        self.buffer.push_str("<li>");
+        self.buffer.push_str(&source[branch.content.clone()]);
+        self.buffer.push_str("</li>");
+    }
+
+    pub fn finish(mut self) -> String {
+        for _ in self.indent_level_stack.drain(..) {
+            self.buffer.push_str("</ul>");
+        }
+        self.buffer
+    }
+}