Generate backlinks

crates/lib/page/src/page.rs

@@ -15,7 +15,7 @@ pub struct PageMetadata {
 	pub author: Option<String>,
 	pub description: Option<String>,
 	pub image: Option<String>,
-	pub slug: Option<String>,
+	pub backlinks: Option<bool>,
 }
 
 impl Default for PageMetadata {
@@ -25,7 +25,7 @@ impl Default for PageMetadata {
 			author: None,
 			description: None,
 			image: None,
-			slug: None,
+			backlinks: None,
 		}
 	}
 }

crates/lib/page/src/requestcontext.rs

@@ -3,6 +3,7 @@ use axum::http::HeaderMap;
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct RequestContext {
 	pub client_info: ClientInfo,
+	pub route: String,
 }
 
 //

crates/lib/page/src/server.rs

@@ -130,6 +130,38 @@ impl PageServer {
 			.and_then(|x| x.to_str().ok())
 			.unwrap_or("");
 
+		// Normalize url with redirect
+		if route.ends_with('/') || route.contains("//") || route.starts_with('/') {
+			let mut new_route = route.clone();
+			while new_route.contains("//") {
+				new_route = new_route.replace("//", "/");
+			}
+			let new_route = new_route.trim_matches('/');
+
+			trace!(
+				message = "Redirecting route",
+				route,
+				new_route,
+				addr = ?addr.addr,
+				user_agent = ua,
+				device_type = ?client_info.device_type
+			);
+
+			let mut headers = HeaderMap::with_capacity(2);
+
+			let new_route = match HeaderValue::from_str(&format!("/{new_route}")) {
+				Ok(x) => x,
+				Err(_) => {
+					// Be extra careful, this is user-provided data
+					return StatusCode::BAD_REQUEST.into_response();
+				}
+			};
+
+			headers.append(header::LOCATION, new_route);
+			headers.append("Accept-CH", HeaderValue::from_static("Sec-CH-UA-Mobile"));
+			return (StatusCode::PERMANENT_REDIRECT, headers).into_response();
+		}
+
 		trace!(
 			message = "Serving route",
 			route,
@@ -138,7 +170,10 @@ impl PageServer {
 			device_type = ?client_info.device_type
 		);
 
-		let req_ctx = RequestContext { client_info };
+		let req_ctx = RequestContext {
+			client_info,
+			route: format!("/{route}"),
+		};
 
 		let cache_key = (route.clone(), req_ctx.clone());
 		let now = Utc::now();

crates/service/service-webpage/src/components/md.rs

@@ -5,12 +5,11 @@ use markdown_it::parser::core::Root;
 use markdown_it::parser::inline::{InlineRule, InlineState};
 use markdown_it::{MarkdownIt, Node, NodeValue, Renderer};
 use maud::{Markup, PreEscaped, Render, html};
-use page::{Page, PageMetadata};
+use page::{Page, PageMetadata, RequestContext};
 use std::str::FromStr;
 
 use crate::components::fa::FAIcon;
 use crate::components::mangle::{MangledBetaEmail, MangledGoogleEmail};
-use crate::components::misc::Backlinks;
 
 lazy_static! {
 	static ref MdParser: MarkdownIt = {
@@ -115,12 +114,13 @@ pub fn page_from_markdown(md: impl Into<String>, default_image: Option<String>)
 
 	Page {
 		meta,
-		generate_html: Box::new(move |page, _| {
+		generate_html: Box::new(move |page, ctx| {
 			let html = html.clone();
+
 			Box::pin(async move {
 				html! {
-					@if let Some(slug) = &page.meta.slug {
-						(Backlinks(&[("/", "home")], slug))
+					@if let Some(backlinks) = backlinks(page, ctx) {
+						(backlinks)
 					}
 
 					(html)
@@ -132,6 +132,36 @@ pub fn page_from_markdown(md: impl Into<String>, default_image: Option<String>)
 	}
 }
 
+pub fn backlinks(page: &Page, ctx: &RequestContext) -> Option<Markup> {
+	let mut last = None;
+	let mut backlinks = vec![("/", "home")];
+
+	if page.meta.backlinks.unwrap_or(false) {
+		let mut segments = ctx.route.split("/").skip(1).collect::<Vec<_>>();
+		last = segments.pop();
+
+		let mut end = 0;
+		for s in segments {
+			end += s.len();
+			backlinks.push((&ctx.route[0..=end], s));
+			end += 1; // trailing slash
+		}
+	}
+
+	last.map(|last| {
+		html! {
+			div {
+				@for (url, text) in backlinks {
+					a href=(url) style="padding-left:5pt;padding-right:5pt;" { (text) }
+					"/"
+				}
+
+				span style="color:var(--metaColor);padding-left:5pt;padding-right:5pt;" { (last) }
+			}
+		}
+	})
+}
+
 //
 // MARK: extensions
 //

crates/service/service-webpage/src/components/misc.rs

@@ -15,20 +15,3 @@ impl<T: Render> Render for FarLink<'_, T> {
 		)
 	}
 }
-
-pub struct Backlinks<'a>(pub &'a [(&'a str, &'a str)], pub &'a str);
-
-impl Render for Backlinks<'_> {
-	fn render(&self) -> Markup {
-		html! {
-			div {
-				@for (url, text) in self.0 {
-					a href=(url) style="padding-left:5pt;padding-right:5pt;" { (text) }
-					"/"
-				}
-
-				span style="color:var(--metaColor);padding-left:5pt;padding-right:5pt;" { (self.1) }
-			}
-		}
-	}
-}

crates/service/service-webpage/src/pages/betalupi.md

@@ -1,7 +1,7 @@
 +++
 title = "What's a \"betalupi?\""
 author = "Mark"
-slug = "whats-a-betalupi"
+backlinks = true
 +++
 
 [es]: https://github.com/endless-sky/endless-sky

crates/service/service-webpage/src/pages/handouts.md

@@ -1,7 +1,7 @@
 +++
 title = "Mark's Handouts"
 author = "Mark"
-slug = "handouts"
+backlinks = true
 +++
 
 # Mark's Handouts

crates/service/service-webpage/src/pages/handouts.rs

@@ -14,8 +14,8 @@ use tracing::{debug, warn};
 
 use crate::{
 	components::{
-		md::{Markdown, meta_from_markdown},
-		misc::{Backlinks, FarLink},
+		md::{Markdown, backlinks, meta_from_markdown},
+		misc::FarLink,
 	},
 	routes::assets::Image_Icon,
 };
@@ -202,7 +202,7 @@ pub fn handouts() -> Page {
 		meta,
 		html_ttl: Some(TimeDelta::seconds(300)),
 
-		generate_html: Box::new(move |page, req_ctx| {
+		generate_html: Box::new(move |page, ctx| {
 			let html = html.clone(); // TODO: find a way to not clone here
 			let index = index.clone();
 			Box::pin(async move {
@@ -222,7 +222,7 @@ pub fn handouts() -> Page {
 				};
 
 				let warmups = match &*handouts {
-					Ok(handouts) => build_list_for_group(handouts, "Warm-Ups", req_ctx),
+					Ok(handouts) => build_list_for_group(handouts, "Warm-Ups", ctx),
 					Err(error) => {
 						warn!("Could not load handout index: {error:?}");
 						fallback.clone()
@@ -230,13 +230,13 @@ pub fn handouts() -> Page {
 				};
 
 				let advanced = match &*handouts {
-					Ok(handouts) => build_list_for_group(handouts, "Advanced", req_ctx),
+					Ok(handouts) => build_list_for_group(handouts, "Advanced", ctx),
 					Err(_) => fallback,
 				};
 
 				html! {
-						@if let Some(slug) = &page.meta.slug {
-							(Backlinks(&[("/", "home")], slug))
+						@if let Some(backlinks) = backlinks(page, ctx) {
+							(backlinks)
 						}
 
 						(html)

crates/service/service-webpage/src/pages/htwah-typesetting.md

@@ -1,9 +1,7 @@
 +++
 title = "HtWaH: Typesetting"
 author = "Mark"
-
-# TODO: many slugs, htwah/typesetting
-slug = "handouts"
+backlinks = true
 +++
 
 ## Table of Contents

crates/service/service-webpage/src/pages/index.rs

@@ -19,7 +19,7 @@ pub fn index() -> Page {
 			author: Some("Mark".into()),
 			description: Some("Description".into()),
 			image: Some(Image_Icon::URL.into()),
-			slug: None,
+			backlinks: Some(false),
 		},
 
 		generate_html: Box::new(move |_page, _| {

crates/service/service-webpage/src/pages/links.md

@@ -1,7 +1,7 @@
 +++
 title = "Links"
 author = "Mark"
-slug = "links"
+backlinks = true
 +++
 
 

crates/service/service-webpage/src/routes/mod.rs

@@ -26,7 +26,7 @@ fn build_server() -> Arc<PageServer> {
 		.add_page("/links", pages::links())
 		.add_page("/whats-a-betalupi", pages::betalupi())
 		.add_page("/handouts", pages::handouts())
-		.add_page("/htwah", pages::htwah_typesetting());
+		.add_page("/htwah/typesetting", pages::htwah_typesetting());
 	server
 }