Render page template within an HTML boilerplate

Makefile

@@ -31,19 +31,19 @@ help:
 .PHONY: build run test bench doc examples graphs clean
 
 build:
-	$(CARGO) build
+	cargo build
 
 run:
-	$(CARGO) run
+	cargo run
 
 clean:
-	$(CARGO) clean
+	cargo clean
 
 doc:
-	$(CARGO) doc
+	cargo doc
 
 test:
-	$(CARGO) test
+	cargo test
 
 graphs-png: $(GRAPH_IMG)
 design/%.png: design/%.gv

src/handlers.rs

@@ -1,11 +1,57 @@
-use handlebars_iron as hbi;
-
+use handlebars::{Handlebars, no_escape};
+use handlebars_iron::{DirectorySource, HandlebarsEngine};
+use handlebars_iron::handlebars::to_json;
+use handlebars_iron::Template;
 use iron::prelude::{Request, Response};
 use iron::{IronResult, Set, status};
 use mount::Mount;
 use serde::ser::Serialize as ToJson;
+use serde_json::value::Map;
 use staticfile::Static;
+use std::error::Error;
 use std::path::Path;
+use std::sync::Arc;
+
+pub fn template_engine() -> Arc<HandlebarsEngine> {
+    let views_ext = ".hbs";
+    let views_path = "./src/views";
+
+    let mut hbs = Handlebars::new();
+
+    // @TODO Find better solution for rendering included template file
+    hbs.register_escape_fn(no_escape);
+
+
+    let mut hbse = HandlebarsEngine::from(hbs);
+    hbse.add(Box::new(
+        DirectorySource::new(views_path, views_ext)
+    ));
+
+    if let Err(r) = hbse.reload() {
+        panic!("{:?}", r.description());
+    }
+
+    let hbse_ref = Arc::new(hbse);
+    if cfg!(debug_assertions) {
+        println!("Templates are being watched.");
+        use handlebars_iron::Watchable;
+        hbse_ref.watch(views_path);
+    }
+
+    hbse_ref
+}
+
+pub fn render_page<T: ToJson>(name: &str, template_data: T) -> Template {
+    let template_engine = template_engine().clone();
+    let template_registry = template_engine.handlebars_mut();
+
+    let page = template_registry.render(name, &template_data).unwrap();
+
+    let mut data = Map::new();
+    data.insert("page".to_string(), to_json(page));
+
+    Template::new("layout/base", data)
+}
 
 pub struct AssetsHandler;
 
@@ -18,15 +64,14 @@ impl AssetsHandler {
     }
 }
 
-fn render_page<T: ToJson>(name: &str, value: T) -> hbi::Template {
-    unimplemented!();
-}
-
 pub fn hello_world (_request: &mut Request) -> IronResult<Response> {
-    use handlebars_iron::Template;
+    use serde_json::value::{Map, Value};
+
+    let mut data = Map::new();
+    data.insert("title".to_string(), to_json(&"Media Collection CRUD".to_owned()));
 
     let mut response = Response::new();
-    response.set_mut(Template::new("index","".to_string()))
+    response.set_mut(render_page("index", data))
         .set_mut(status::Ok);
 
     Ok(response)

src/lib.rs

@@ -2,5 +2,5 @@ pub mod chain;
 pub mod db;
 pub mod handlers;
 pub mod models;
+// pub mod schema;
 
-// pub mod schema;

src/main.rs

@@ -2,46 +2,9 @@
 #[macro_use] extern crate mime;
 
 use env_logger;
+use iron::prelude::Iron;
 
-use handlebars as hbs;
-use handlebars_iron as hbi;
-
-use hbs::Handlebars;
-use hbi::{DirectorySource, HandlebarsEngine};
-
-use iron::prelude::{Chain, Iron};
-use std::error::Error;
-use std::sync::Arc;
-
-use media_collection_crud::{chain, db};
-
-fn init_templating() -> Chain {
-	let views_ext = ".hbs";
-	let views_path = "./src/views";
-
-	let hbs = Handlebars::new();
-	let mut hbse = HandlebarsEngine::from(hbs);
-	// TODO: Investigate serving the templates out of the binary using include_string!
-	hbse.add(Box::new(
-		DirectorySource::new(views_path, views_ext)
-	));
-
-	if let Err(r) = hbse.reload() {
-		panic!("{:?}", r.description());
-	}
-
-	let hbse_ref = Arc::new(hbse);
-	if cfg!(debug_assertions) {
-		println!("Templates are being watched.");
-		use hbi::Watchable;
-		hbse_ref.watch(views_path);
-	}
-
-	let mut chain = chain::init();
-	chain.link_after(hbse_ref);
-
-	chain
-}
+use media_collection_crud::{chain, handlers, db};
 
 fn main() {
 	env_logger::init();
@@ -50,7 +13,11 @@ fn main() {
 	let port = 8000;
 	let bind_addr = format!("localhost:{}", port);
 
-	let _server_guard = Iron::new(init_templating())
+	let mut chain = chain::init();
+	let templating_engine = handlers::template_engine().clone();
+	chain.link_after(templating_engine);
+
+	let _server_guard = Iron::new(chain)
 		.http(bind_addr.as_str())
 		.unwrap();
 }

src/models.rs

@@ -2,7 +2,7 @@ use diesel::Queryable;
 
 // use crate::schema::*;
 
-#[derive(Queryable)]
+#[derive(Debug, Queryable)]
 // #[table_name="media"]
 pub struct Media {
     pub id: u32,
@@ -10,7 +10,7 @@ pub struct Media {
     pub notes: String,
 }
 
-#[derive(Queryable)]
+#[derive(Debug, Queryable)]
 // #[table_name="media_type"]
 pub struct MediaType {
     pub id: u32,
@@ -18,7 +18,7 @@ pub struct MediaType {
     pub description: String,
 }
 
-#[derive(Queryable)]
+#[derive(Debug, Queryable)]
 // #[table_name="media_format"]
 pub struct MediaFormat {
     pub id: u32,
@@ -27,7 +27,7 @@ pub struct MediaFormat {
     pub description: String,
 }
 
-#[derive(Queryable)]
+#[derive(Debug, Queryable)]
 pub struct MediaTypeFormatLink {
     pub media_type_id: i32,
     pub media_format_id: i32,

src/views/footer.hbs

@@ -0,0 +1,3 @@
+<footer>
+    <p>&copy; Timothy J. Warren</p>
+</footer>

src/views/header.hbs

@@ -0,0 +1,3 @@
+<header>
+    <h1>Media Collection CRUD</h1>
+</header>

src/views/index.hbs

@@ -1,13 +1,4 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8" />
-    <title>Rust web server</title>
-    <link rel="stylesheet" href="/public/css/mini-default.min.css" />
-</head>
-<body>
-<header>
-    <h1>Hello, world!</h1>
-</header>
-</body>
-</html>
+<main>
+    <h2>Index Page</h2>
+    <p>Testing rendering of internal content.</p>
+</main>

src/views/layout/base.hbs

@@ -1,15 +1,5 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <meta charset="utf-8" />
-    <title>{{#title}}Rust web server{{/title}}</title>
-    <link rel="stylesheet" href="/public/css/mini-default.min.css" />
-</head>
-<body>
+{{> layout/top}}
     {{> header}}
-    {{#block "content"}}
-        Some default content
-    {{/block}}
+    {{~ page}}
     {{> footer}}
-</body>
-</html>
+{{> layout/bottom}}

src/views/layout/bottom.hbs

@@ -0,0 +1,2 @@
+</body>
+</html>

src/views/layout/top.hbs

@@ -0,0 +1,8 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <title>{{title}}</title>
+    <link rel="stylesheet" href="/public/css/mini-default.min.css" />
+</head>
+<body>