Add URL parsing.

src/error/error.rs

@@ -16,6 +16,7 @@ pub(crate) enum CustomError {
     DusterCompile(duster::renderer::CompileError),
     DusterRender(duster::renderer::RenderError),
     PathStripPrefix(std::path::StripPrefixError),
+    UrlParseError(url::ParseError),
 }
 
 impl From<std::io::Error> for CustomError {
@@ -95,3 +96,9 @@ impl From<std::path::StripPrefixError> for CustomError {
         CustomError::PathStripPrefix(value)
     }
 }
+
+impl From<url::ParseError> for CustomError {
+    fn from(value: url::ParseError) -> Self {
+        CustomError::UrlParseError(value)
+    }
+}

src/intermediate/regular_link.rs

@@ -1,4 +1,5 @@
 use organic::types::StandardProperties;
+use url::Url;
 
 use super::macros::intermediate;
 
@@ -46,6 +47,7 @@ pub(crate) enum LinkTarget {
 impl LinkTarget {
     pub(crate) fn from_string<S: AsRef<str>>(input: S) -> Result<LinkTarget, CustomError> {
         fn impl_from_string(input: &str) -> Result<LinkTarget, CustomError> {
+            let parsed = Url::parse(input)?;
             Ok(LinkTarget::Raw(input.to_owned()))
         }
         impl_from_string(input.as_ref())