add tags

posts/dungeon/index.md

@@ -3,8 +3,6 @@ date = 2018-01-10T17:50:00+01:00
 draft = false
 title = "Yet another (traditional) roguelike written in c++"
 aliases = ["/blog/dungeon/", "/blog/dungeon.html"]
-
-[taxonomies]
 tags = ["cpp", "roguelike"]
 +++
 

src/handlers/mod.rs

@@ -15,6 +15,7 @@ use tracing::{instrument, log::*};
 use crate::{AppState, WebsiteError};
 
 pub mod posts;
+pub mod tags;
 
 lazy_static! {
     pub static ref HIT_COUNTER: IntCounterVec = prometheus::register_int_counter_vec!(
@@ -31,6 +32,7 @@ pub fn routes(state: &Arc<AppState>) -> Router<Arc<AppState>> {
     Router::new()
         .route("/", get(index))
         .nest("/posts", posts::router())
+        .nest("/tags", tags::router())
         .merge(posts::alias_router(state.posts.values()))
         .route("/healthcheck", get(healthcheck))
         .route("/metrics", get(metrics))
@@ -67,17 +69,22 @@ async fn metrics() -> impl IntoResponse {
         .unwrap()
 }
 
-pub async fn not_found() -> Response {
-    (StatusCode::NOT_FOUND, ()).into_response()
+pub async fn not_found() -> impl IntoResponse {
+    (StatusCode::NOT_FOUND, ())
 }
 
 pub async fn metrics_middleware<B>(request: Request<B>, next: Next<B>) -> Response {
     let path = request.uri().path().to_string();
     let method = request.method().to_string();
+
     let response = next.run(request).await;
-    HIT_COUNTER
-        .with_label_values(&[&path, &method, response.status().as_str()])
-        .inc();
+
+    if !response.status().is_client_error() {
+        HIT_COUNTER
+            .with_label_values(&[&path, &method, response.status().as_str()])
+            .inc();
+    }
+
     response
 }
 
@@ -113,9 +120,11 @@ mod tests {
     async fn setup_routes() {
         // Load the actual posts, just to make this test fail if
         // aliases overlap with themselves or other routes
+        let posts = crate::post::load_all().await.unwrap();
         let state = Arc::new(AppState {
             tera: tera::Tera::new("templates/**/*").unwrap(),
-            posts: crate::post::load_all().await.unwrap(),
+            tags: crate::tag::get_tags(posts.values()),
+            posts,
         });
 
         super::routes(&state)

src/handlers/tags.rs

@@ -0,0 +1,53 @@
+use std::sync::Arc;
+
+use axum::{Router, response::Html, routing::get, extract::{State, Path}};
+use serde_derive::Serialize;
+use tracing::instrument;
+
+use crate::{AppState, WebsiteError, post::Post};
+
+pub fn router() -> Router<Arc<AppState>> {
+    Router::new()
+        .route("/", get(index))
+        .route("/:tag/", get(view))
+}
+
+#[derive(Serialize, Debug)]
+struct PageContext<'a> {
+    title: &'a str,
+}
+
+#[instrument(skip(state))]
+pub async fn index(State(state): State<Arc<AppState>>) -> Result<Html<String>, WebsiteError> {
+
+    let tags: Vec<_> = state.tags.values().collect();
+    let ctx = PageContext { title: "Tags" };
+
+    let mut c = tera::Context::new();
+    c.insert("page", &ctx);
+    c.insert("tags", &tags);
+
+    let res = state.tera.render("tags_index.html", &c)?;
+
+    Ok(Html(res))
+}
+
+#[instrument(skip(state))]
+pub async fn view(Path(tag): Path<String>, State(state): State<Arc<AppState>>) -> Result<Html<String>, WebsiteError> {
+    let mut posts: Vec<&Post> = state.posts.values().filter(|p| p.is_published() && p.tags.contains(&tag)).collect();
+
+    posts.sort_by_key(|p| &p.date);
+    posts.reverse();
+
+    let title = format!("Posts tagged with #{tag}");
+
+    let ctx = PageContext { title: &title };
+
+    let mut c = tera::Context::new();
+    c.insert("page", &ctx);
+    c.insert("posts", &posts);
+
+    let res = state.tera.render("tag.html", &c)?;
+
+    Ok(Html(res))
+}

src/main.rs

@@ -4,15 +4,18 @@ use color_eyre::eyre::{Error, Result};
 
 use post::Post;
 
+use tag::Tag;
 use tera::Tera;
-use tower_http::{compression::CompressionLayer, trace::TraceLayer};
+use tower_http::{compression::CompressionLayer, trace::TraceLayer, cors::CorsLayer};
 use tracing::log::*;
 
 mod handlers;
 mod post;
+mod tag;
 
 pub struct AppState {
     posts: HashMap<String, Post>,
+    tags: HashMap<String, Tag>,
     tera: Tera,
 }
 
@@ -24,9 +27,11 @@ async fn main() -> Result<()> {
 
     let tera = Tera::new("templates/**/*")?;
     let posts = post::load_all().await?;
-    let state = Arc::new(AppState { tera, posts });
+    let tags = tag::get_tags(posts.values());
+    let state = Arc::new(AppState { tera, posts, tags });
 
     let app = handlers::routes(&state)
+        .layer(CorsLayer::permissive())
         .layer(TraceLayer::new_for_http())
         .layer(CompressionLayer::new())
         .with_state(state);

src/tag.rs

@@ -0,0 +1,33 @@
+use std::collections::HashMap;
+
+use serde_derive::Serialize;
+
+use crate::post::Post;
+
+#[derive(Serialize, Debug)]
+pub struct Tag {
+    pub slug: String,
+    pub absolute_path: String,
+    pub posts: Vec<String>,
+}
+
+pub fn get_tags<'a>(posts: impl IntoIterator<Item=&'a Post>) -> HashMap<String,Tag> {
+    let mut tags: HashMap<String,Tag> = HashMap::new();
+
+    for post in posts.into_iter().filter(|p| p.is_published()) {
+        for key in &post.tags {
+            if let Some(tag) = tags.get_mut(key) {
+                tag.posts.push(post.slug.clone());
+            }
+            else {
+                tags.insert(key.clone(), Tag {
+                    slug: key.clone(),
+                    absolute_path: format!("/tags/{key}/"),
+                    posts: vec![post.slug.clone()]
+                });
+            }
+        }
+    }
+
+    tags
+}

static/site.css

@@ -3,3 +3,12 @@ body {
     margin: auto;
     padding: 8px;
 }
+
+.tags {
+    list-style: none;
+}
+
+.tags > li {
+    display: inline-block;
+    margin-right: 1em;
+}

templates/post.html

@@ -9,5 +9,12 @@
             <small>Posted on <time datetime="{{ page.date }}">{{ page.date | date(format="%Y-%m-%d %H:%M") }}</time></small>
         {% endif -%}
         {{ page.content | safe -}}
+        {% if page.tags -%}
+            <small>
+                <ul class="tags">
+                    {% for tag in page.tags %}<li><a href="/tags/{{tag}}/">#{{ tag }}</a></li>{% endfor %}
+                </ul>
+            </small>
+        {% endif -%}
     </article>
 {% endblock main -%}

templates/tag.html

@@ -0,0 +1,19 @@
+{% extends "base.html" %}
+
+{% block main -%}
+    <article>
+        {% if page.title -%}
+            <h1>{{ page.title }}</h1>
+        {% endif -%}
+        <ul>
+            {% for post in posts -%}
+                <li><a href="{{post.absolute_path | safe}}">{% if post.date -%}
+                    <time datetime="{{ post.date }}">{{ post.date | date(format="%Y-%m-%d") }}</time> - {{ post.title -}}
+                    {% else -%}
+                    {{ post.title -}}
+                    {% endif -%}
+                </a></li>
+            {% endfor -%}
+        </ul>
+    </article>
+{% endblock main -%}

templates/tags_index.html

@@ -0,0 +1,9 @@
+{% extends "base.html" %}
+{% block main -%}
+    <h1>Tags</h1>
+    <ul>
+    {% for tag in tags -%}
+        <li><a href="{{tag.absolute_path | safe}}">#{{ tag.slug }}</a></li>
+    {% endfor -%}
+    </ul>
+{% endblock main -%}