1 files changed, 79 insertions, 6 deletions

diff --git a/kittybox-rs/src/webmentions/mod.rs b/kittybox-rs/src/webmentions/mod.rs
index becddbc..a47fadb 100644
--- a/kittybox-rs/src/webmentions/mod.rs
+++ b/kittybox-rs/src/webmentions/mod.rs
@@ -1,6 +1,8 @@
 use axum::{Form, response::{IntoResponse, Response}, Extension};
 use axum::http::StatusCode;
+use tracing::error;
 
+use crate::database::{Storage, StorageError};
 use self::queue::JobQueue;
 pub mod queue;
 
@@ -38,9 +40,12 @@ async fn accept_webmention<Q: JobQueue<Webmention>>(
     }
 }
 
-pub fn router<Q: JobQueue<Webmention>>(queue: Q, cancellation_token: tokio_util::sync::CancellationToken) -> (axum::Router, SupervisedTask) {
+pub fn router<Q: JobQueue<Webmention>, S: Storage + 'static>(
+    queue: Q, db: S, http: reqwest::Client,
+    cancellation_token: tokio_util::sync::CancellationToken
+) -> (axum::Router, SupervisedTask) {
     // Automatically spawn a background task to handle webmentions
-    let bgtask_handle = supervised_webmentions_task(queue.clone(), cancellation_token);
+    let bgtask_handle = supervised_webmentions_task(queue.clone(), db, http, cancellation_token);
 
     let router = axum::Router::new()
         .route("/.kittybox/webmention",
@@ -100,7 +105,17 @@ where
         .unwrap();
 }
 
-async fn process_webmentions_from_queue<Q: JobQueue<Webmention>>(queue: Q) -> Result<std::convert::Infallible, Q::Error> {
+mod check;
+
+#[derive(thiserror::Error, Debug)]
+enum Error<Q: std::error::Error + std::fmt::Debug + Send + 'static> {
+    #[error("queue error: {0}")]
+    Queue(#[from] Q),
+    #[error("storage error: {0}")]
+    Storage(StorageError)
+}
+
+async fn process_webmentions_from_queue<Q: JobQueue<Webmention>, S: Storage + 'static>(queue: Q, db: S, http: reqwest::Client) -> Result<std::convert::Infallible, Error<Q::Error>> {
     use futures_util::StreamExt;
     use self::queue::Job;
 
@@ -112,11 +127,69 @@ async fn process_webmentions_from_queue<Q: JobQueue<Webmention>>(queue: Q) -> Re
             job.target.parse::<url::Url>().unwrap()
         );
 
-        todo!()
+        let (code, text) = match http.get(source.clone()).send().await {
+            Ok(response) => {
+                let code = response.status();
+                if ![StatusCode::OK, StatusCode::GONE].iter().any(|i| i == &code) {
+                    error!("error processing webmention: webpage fetch returned {}", code);
+                    continue;
+                }
+                match response.text().await {
+                    Ok(text) => (code, text),
+                    Err(err) => {
+                        error!("error processing webmention: error fetching webpage text: {}", err);
+                        continue
+                    }
+                }
+            }
+            Err(err) => {
+                error!("error processing webmention: error requesting webpage: {}", err);
+                continue
+            }
+        };
+
+        if code == StatusCode::GONE {
+            todo!("removing webmentions is not implemented yet");
+            // db.remove_webmention(target.as_str(), source.as_str()).await.map_err(Error::<Q::Error>::Storage)?;
+        } else {
+            // Verify webmention
+            let (mention_type, mut mention) = match tokio::task::block_in_place({
+                || check::check_mention(text, &source, &target)
+            }) {
+                Ok(Some(mention_type)) => mention_type,
+                Ok(None) => {
+                    error!("webmention {} -> {} invalid, rejecting", source, target);
+                    item.done().await?;
+                    continue;
+                }
+                Err(err) => {
+                    error!("error processing webmention: error checking webmention: {}", err);
+                    continue;
+                }
+            };
+
+            {
+                mention["type"] = serde_json::json!(["h-cite"]);
+
+                if !mention["properties"].as_object().unwrap().contains_key("uid") {
+                    let url = mention["properties"]["url"][0].as_str().unwrap_or_else(|| target.as_str()).to_owned();
+                    let props = mention["properties"].as_object_mut().unwrap();
+                    props.insert("uid".to_owned(), serde_json::Value::Array(
+                        vec![serde_json::Value::String(url)])
+                    );
+                }
+            }
+
+            db.add_or_update_webmention(target.as_str(), mention_type, mention).await.map_err(Error::<Q::Error>::Storage)?;
+        }
     }
     unreachable!()
 }
 
-fn supervised_webmentions_task<Q: JobQueue<Webmention>>(queue: Q, cancellation_token: tokio_util::sync::CancellationToken) -> SupervisedTask {
-    supervisor::<Q::Error, _, _>(move || process_webmentions_from_queue(queue.clone()), cancellation_token)
+fn supervised_webmentions_task<Q: JobQueue<Webmention>, S: Storage + 'static>(
+    queue: Q, db: S,
+    http: reqwest::Client,
+    cancellation_token: tokio_util::sync::CancellationToken
+) -> SupervisedTask {
+    supervisor::<Error<Q::Error>, _, _>(move || process_webmentions_from_queue(queue.clone(), db.clone(), http.clone()), cancellation_token)
 }