From e02572711822188ef7fd4f57a2c7262bf0496d8f Mon Sep 17 00:00:00 2001
From: gyoder <70408179+gyoder@users.noreply.github.com>
Date: Sat, 5 Jul 2025 16:13:17 -0600
Subject: added apache2 cgi script

---
 htmlua-parser/src/render.rs | 239 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 239 insertions(+)
 create mode 100644 htmlua-parser/src/render.rs

(limited to 'htmlua-parser/src/render.rs')

diff --git a/htmlua-parser/src/render.rs b/htmlua-parser/src/render.rs
new file mode 100644
index 0000000..d5b291f
--- /dev/null
+++ b/htmlua-parser/src/render.rs
@@ -0,0 +1,239 @@
+use std::cell::RefCell;
+use std::fmt::Write;
+use std::fs::read_to_string;
+use std::path::PathBuf;
+use std::rc::Rc;
+
+use anyhow::Result;
+use anyhow::anyhow;
+use kuchikiki::{
+    NodeRef,
+    traits::TendrilSink,
+};
+use mlua::{Lua, Table};
+
+fn create_luahtml_stdlib(l: &Lua, stdout: &Rc<RefCell<String>>) -> mlua::Result<Table> {
+    let t = l.create_table()?;
+
+    // This cannot be the best way to do this
+
+    let stdout_println = stdout.clone();
+    t.set(
+        "println",
+        l.create_function(move |_, text: String| {
+            let mut stdout_ref = stdout_println.borrow_mut();
+            writeln!(stdout_ref, "{text}").map_err(mlua::Error::external)
+        })?,
+    )?;
+
+    let stdout_print = stdout.clone();
+    t.set(
+        "print",
+        l.create_function(move |_, text: String| {
+            let mut stdout_ref = stdout_print.borrow_mut();
+            write!(stdout_ref, "{text}").map_err(mlua::Error::external)
+        })?,
+    )?;
+    Ok(t)
+}
+
+pub fn execute_lua(document: NodeRef) -> Result<NodeRef> {
+    let lua = Lua::new();
+    let globals = lua.globals();
+
+    let stdout: Rc<RefCell<String>> = Rc::new(RefCell::new(String::new()));
+
+    let htmlua_table = create_luahtml_stdlib(&lua, &stdout)
+        .map_err(|e| anyhow!("Failed to create Lua stdlib: {}", e))?;
+
+    globals
+        .set("htmlua", htmlua_table)
+        .map_err(|e| anyhow!("Failed to set global: {}", e))?;
+
+    let lua_elements: Vec<_> = match document.select("lua") {
+        Ok(e) => e.collect(),
+        Err(()) => return Err(anyhow!("Unable to find Lua")),
+    };
+
+    for node in lua_elements {
+        if let Some(text_node) = node.as_node().first_child() {
+            if let Some(lua_code) = text_node.as_text() {
+                stdout.borrow_mut().clear();
+                lua.load(lua_code.borrow().as_str())
+                    .exec()
+                    .map_err(|e| anyhow!("Failed to execute Lua: {}", e))?;
+                node.as_node()
+                    .insert_before(NodeRef::new_text(stdout.borrow().as_str()));
+                node.as_node().detach();
+            }
+        }
+    }
+
+    Ok(document)
+}
+
+pub fn expand_template(document: NodeRef, component_path: &PathBuf, include_from: Option<&NodeRef>) -> Result<NodeRef> {
+    if let Some(from_node) = include_from {
+
+
+        for i in document.select("includeelement").map_err(|()| anyhow!("Error finding includeelement"))? {
+            if let Some(name) = i.attributes.borrow().get("name") {
+                let exported = from_node.select_first(format!("exportelement.{name}").as_str()).map_err(|()| anyhow!("Error finding exportelement"))?;
+                exported.as_node().children().for_each(|c| i.as_node().insert_after(c));
+            }
+        }
+        while let Ok(i) = document.select_first("includeelement") {
+            i.as_node().detach();
+        }
+
+    }
+    for i in document.select("include").map_err(|()| anyhow!("Error finding include"))? {
+        let attrs = match i.as_node().as_element() {
+            Some(e) => e.attributes.borrow(),
+            None => continue,
+        };
+        if let Some(include_path) = attrs.get("path") {
+            let mut item_path = component_path.clone();
+            item_path.push(include_path);
+            let component_text = read_to_string(item_path)?;
+            let new_node = kuchikiki::parse_html().one(component_text);
+            let replaced_node = expand_template(new_node, component_path, Some(i.as_node()))?;
+            i.as_node().insert_before(replaced_node);
+            i.as_node().detach();
+        }
+    }
+    Ok(document)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn basic_lua() {
+        let page = r#"
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <title>Basic HTML Page</title>
+            </head>
+            <body>
+                <h1>Hello World</h1>
+                <p>This is a paragraph.</p>
+                <span><lua>
+                    htmlua.println("Test from Lua!")
+                </lua></span>
+            </body>
+            </html>"#;
+        let document =  kuchikiki::parse_html().one(page);
+        let d = execute_lua(document).unwrap();
+        let text = d.select_first("span").unwrap().as_node().text_contents();
+        assert_eq!(text, "Test from Lua!\n");
+        assert!(d.select_first("lua").is_err());
+    }
+
+    #[test]
+    fn multiple_lua() {
+        let page = r#"
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <title>Basic HTML Page</title>
+            </head>
+            <body>
+                <h1>Hello World</h1>
+                <p>This is a paragraph.</p>
+                <span id="ta"><lua>
+                    htmlua.println("Test from Lua!")
+                </lua></span>
+                <div>
+                    <span id="tb"><lua>htmlua.println("test 2")</lua></span>
+                </div>
+            </body>
+            </html>"#;
+        let document =  kuchikiki::parse_html().one(page);
+        let d = execute_lua(document).unwrap();
+        let text = d.select_first("#ta").unwrap().as_node().text_contents();
+        assert_eq!(text, "Test from Lua!\n");
+        let text = d.select_first("#tb").unwrap().as_node().text_contents();
+        assert_eq!(text, "test 2\n");
+        assert!(d.select_first("lua").is_err());
+    }
+
+    #[test]
+    fn basic_include() {
+        let page = r#"
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <title>Basic HTML Page</title>
+            </head>
+            <body>
+                <h1>Hello World</h1>
+                <p>This is a paragraph.</p>
+                <include path="comp1.html" />
+                <span><lua>
+                    htmlua.println("Test from Lua!")
+                </lua></span>
+            </body>
+            </html>"#;
+        let mut p = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        p.push("tests/components");
+        let document =  kuchikiki::parse_html().one(page);
+        let d = expand_template(document, &p, None).unwrap();
+        let text = d.select_first("span").unwrap().as_node().text_contents();
+        assert_eq!(text, "included1");
+        assert!(d.select_first("include").is_err());
+    }
+
+    #[test]
+    fn recursive_include() {
+        let page = r#"
+            <!DOCTYPE html>
+            <html>
+                <head>
+                    <title>Basic HTML Page</title>
+                </head>
+            <body>
+                <h1>Hello World</h1>
+                <include path="comp2_level1.html" />
+            </body>
+            </html>"#;
+        let mut p = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        p.push("tests/components");
+        let document =  kuchikiki::parse_html().one(page);
+        let d = expand_template(document, &p, None).unwrap();
+        let text = d.select_first("span").unwrap().as_node().text_contents();
+        assert_eq!(text, "included_twice");
+        assert!(d.select_first("include").is_err());
+    }
+
+    #[test]
+    fn export_element_include() {
+        let page = r#"
+            <!DOCTYPE html>
+            <html>
+                <head>
+                    <title>Basic HTML Page</title>
+                </head>
+            <body>
+                <h1>Hello World</h1>
+                <include path="with_include1.html">
+                    <exportelement class="el1"><span id="ta">element 1</span></exportelement>
+                    <exportelement class="el2"><span id="tb">element 2</span></exportelement>
+                </include>
+            </body>
+            </html>"#;
+        let mut p = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
+        p.push("tests/components");
+        let document =  kuchikiki::parse_html().one(page);
+        let d = expand_template(document, &p, None).unwrap();
+        let text = d.select_first("#ta").unwrap().as_node().text_contents();
+        assert_eq!(text, "element 1");
+        let text = d.select_first("#tb").unwrap().as_node().text_contents();
+        assert_eq!(text, "element 2");
+        assert!(d.select_first("exportelement").is_err());
+        assert!(d.select_first("includeelement").is_err());
+    }
+
+}
-- 
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