add url_encode helper

Cargo.toml

@@ -18,6 +18,7 @@ tokio = { version = "1.20.1", features = ["macros"] }
 
 # To extract the base URI
 url = "2.2.2"
+urlencoding = "2.1.3"
 
 # CLI
 clap = { version = "4.4.12", features = ["derive", "env"] }

src/gooseberry/knowledge_base.rs

@@ -88,6 +88,7 @@
 }
 
 handlebars_helper!(date_format: |format: str, date: Json| format_date(format, date).map_err(|e| RenderError::from_error("serde_json", e))?);
+handlebars_helper!(url_encode: |s: str| {urlencoding::encode(s).to_string()});
 
 pub(crate) struct Templates<'a> {
     pub(crate) annotation_template: &'a str,
@@ -110,6 +111,7 @@
     handlebars_misc_helpers::register(&mut hbs);
     hbs.register_escape_fn(handlebars::no_escape);
     hbs.register_helper("date_format", Box::new(date_format));
+    hbs.register_helper("url_encode", Box::new(url_encode));
     hbs.register_template_string("annotation", templates.annotation_template)?;
     hbs.register_template_string("page", templates.page_template)?;
     hbs.register_template_string("index_link", templates.index_link_template)?;
@@ -355,7 +357,7 @@
             // Index file has links to each page
             let mut index_links = vec![];
             struct RecurseFolder<'s> {
                 f: &'s dyn Fn(
                     &RecurseFolder,
                     Vec<AnnotationTemplate>,
                     PathBuf,