web: port to handlebars 3, the version used in rocket's dyn templates

Cargo.lock

@@ -936,7 +936,7 @@ dependencies = [
  "gettext-utils",
  "glob",
  "hagrid-database",
- "handlebars 1.1.0",
+ "handlebars",
  "hyperx",
  "lazy_static",
  "lettre",
@@ -1014,23 +1014,6 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "handlebars"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d82e5750d8027a97b9640e3fefa66bbaf852a35228e1c90790efd13c4b09c166"
-dependencies = [
- "lazy_static",
- "log 0.4.14",
- "pest",
- "pest_derive",
- "quick-error 1.2.3",
- "regex",
- "serde",
- "serde_json",
- "walkdir",
-]
-
 [[package]]
 name = "handlebars"
 version = "3.5.5"
@@ -2475,7 +2458,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c83f1287ad8fa034410928297a91db37518d5c46d7cc7e1e1b4a77aec0cd8807"
 dependencies = [
  "glob",
- "handlebars 3.5.5",
+ "handlebars",
  "normpath",
  "notify",
  "rocket",

Cargo.toml

@@ -28,7 +28,7 @@ time = "0.1"
 tempfile = "3.0"
 structopt = "0.2"
 url = "1.6"
-handlebars = "1.1.0"
+handlebars = "3"
 num_cpus = "1.0"
 ring = "0.13"
 base64 = "0.10"

src/i18n.rs

@@ -56,7 +56,7 @@ impl HelperDef for I18NHelper {
         h: &Helper<'reg, 'rc>,
         reg: &'reg Handlebars,
         context: &'rc Context,
-        rcx: &mut RenderContext<'reg>,
+        rcx: &mut RenderContext<'reg, '_>,
         out: &mut dyn Output,
     ) -> HelperResult {
         let id = if let Some(id) = h.param(0) {
@@ -76,7 +76,7 @@ impl HelperDef for I18NHelper {
         let rerender = h
             .param(1)
             .and_then(|p| p
-                      .path()
+                      .relative_path()
                       .map(|v| v == "rerender")
                     ).unwrap_or(false);
 
@@ -87,14 +87,20 @@ impl HelperDef for I18NHelper {
             .as_str()
             .expect("Language must be string");
 
+        fn render_error_with<E>(e: E) -> RenderError
+        where
+            E: std::error::Error + Send + Sync + 'static
+        {
+            RenderError::from_error("Failed to render", e)
+        }
         let response = self.lookup(lang, &id);
         if rerender {
-            let data = rcx.evaluate(context, ".", false).unwrap();
-            let response = reg.render_template(&response, data)
-                .map_err(RenderError::with)?;
-            out.write(&response).map_err(RenderError::with)?;
+            let data = rcx.evaluate(context, "this").unwrap();
+            let response = reg.render_template(&response, data.as_json())
+                .map_err(render_error_with)?;
+            out.write(&response).map_err(render_error_with)?;
         } else {
-            out.write(&response).map_err(RenderError::with)?;
+            out.write(&response).map_err(render_error_with)?;
         }
         Ok(())
     }

src/mail.rs

@@ -52,7 +52,7 @@ mod context {
 pub struct Service {
     from: Mailbox,
     domain: String,
-    templates: Handlebars,
+    templates: Handlebars<'static>,
     transport: Transport,
 }
 

src/template_helpers.rs

@@ -48,7 +48,7 @@ fn load_localized_template_names(template_path: &Path, localized_dir: &str) -> R
     .collect()
 }
 
-pub fn load_handlebars(template_dir: &Path) -> Result<Handlebars> {
+pub fn load_handlebars(template_dir: &Path) -> Result<Handlebars<'static>> {
     let mut handlebars = Handlebars::new();
 
     let i18ns = include_i18n!();