From cd8f761fcf753218b9bd9e98ee570702c647c179 Mon Sep 17 00:00:00 2001
From: Peter Cai <peter@typeblog.net>
Date: Wed, 8 Apr 2020 20:00:40 +0800
Subject: [PATCH] implement showing blog

no rendering yet
---
 src/blog.rs |  5 +++++
 src/lib.rs  | 47 ++++++++++++++++++++++++++++++++++++++++++++++-
 src/sn.rs   | 11 +++++++++++
 3 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/src/blog.rs b/src/blog.rs
index 589aa4c..45b3916 100644
--- a/src/blog.rs
+++ b/src/blog.rs
@@ -98,6 +98,11 @@ impl Post {
         store::get_obj(&Self::uuid_to_post_key(uuid)).await
     }
 
+    pub async fn find_by_url(url: &str) -> MyResult<Post> {
+        let uuid = store::get_str(&Self::url_to_mapping_key(url)).await?;
+        Self::find_by_uuid(&uuid).await
+    }
+
     // Write the Post to KV storage; this can be a new post or
     // update to an existing post; either way, the CALLER is
     // responsible for making sure PostsList is updated with the
diff --git a/src/lib.rs b/src/lib.rs
index 144a698..f20d690 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -42,7 +42,52 @@ fn build_routes() -> router::Router {
     return router;
 }
 
-async fn default_route(_req: Request, _url: Url) -> MyResult<Response> {
+async fn default_route(_req: Request, url: Url) -> MyResult<Response> {
+    // We assume that anything that falls into this catch-all handler
+    // would be either posts or 404
+    // If the path doesn't end with `/`, normalize it first
+    let path = url.pathname();
+    if !path.ends_with("/") {
+        return Response::new_with_opt_str_and_init(
+            None,
+            ResponseInit::new()
+                .status(302)
+                .headers(headers!{
+                    "Location" => &format!("{}{}/", url.origin(), path)
+                }.as_ref())
+        ).internal_err();
+    }
+
+    // TODO: handle home page and pagination on home page
+    // Now we can be sure the path ends with `/`
+    // (and of course it starts with `/` as per standard)
+    if path.len() > 1 {
+        let path = &path[1..path.len() - 1];
+        if let Ok(post) = blog::Post::find_by_url(path).await {
+            if post.url != path {
+                // Redirect to the latest path of the post
+                return Response::new_with_opt_str_and_init(
+                    None,
+                    ResponseInit::new()
+                        .status(301)
+                        .headers(headers!{
+                            "Location" => &format!("{}/{}/", url.origin(), post.url)
+                        }.as_ref())
+                ).internal_err();
+            } else {
+                // TODO: Actually render the page...
+                return Response::new_with_opt_str_and_init(
+                    Some(&post.content),
+                    ResponseInit::new()
+                        .status(200)
+                        .headers(headers!{
+                            "Content-Type" => "text/html"
+                        }.as_ref())
+                ).internal_err();
+            }
+        }
+    }
+
     Err(Error::NotFound("This page is not available".into()))
 }
 
diff --git a/src/sn.rs b/src/sn.rs
index e9b8a01..219cd91 100644
--- a/src/sn.rs
+++ b/src/sn.rs
@@ -53,6 +53,17 @@ async fn get_actions(_req: Request, url: Url) -> MyResult<Response> {
         access_type: Some(AccessType::Decrypted)
     });
 
+    if post_exists {
+        actions.push(Action {
+            label: "Open Post".into(),
+            url: format!("{}/{}/", origin, post.unwrap().url),
+            verb: Verb::Show,
+            context: Context::Item,
+            content_types: vec![ContentType::Note],
+            access_type: None
+        })
+    }
+
     let info = ActionsExtension {
         identifier: CONFIG.plugin_identifier.clone(),
         name: CONFIG.title.clone(),