add support deletion

crates/signed_state/src/repo_list.rs

@@ -5,7 +5,7 @@ use std::time::Duration;
 use anyhow::Error;
 use gpui::{AppContext, Context, Subscription, Task};
 use nostr_sdk::prelude::*;
-use signed_core::{Announcement, RepoAddr, filters, repo_addr};
+use signed_core::{Announcement, Deletions, RepoAddr, filters, repo_addr};
 
 use crate::backend::{Backend, BackendEvent};
 
@@ -40,9 +40,12 @@ impl RepoListStore {
         let subscription = cx.subscribe(&backend, |this, _backend, event, cx| {
             let relevant = match event {
                 BackendEvent::NostrUpdate(update) => {
-                    // Activity (patches, issues, ...) is addressed to repos via
-                    // `a` tags, so its author isn't the repo owner; always refresh.
-                    if filters::ACTIVITY_KINDS.contains(&update.kind) {
+                    // Deletions may target anything we list; always refresh.
+                    if update.kind == Kind::EventDeletion || update.kind == Kind::RequestToVanish {
+                        true
+                    } else if filters::ACTIVITY_KINDS.contains(&update.kind) {
+                        // Activity (patches, issues, ...) is addressed to repos via
+                        // `a` tags, so its author isn't the repo owner; always refresh.
                         true
                     } else {
                         let is_announcement = update.kind == Kind::GitRepoAnnouncement;
@@ -98,6 +101,9 @@ impl RepoListStore {
                 None => filters::all_announcements(),
             };
             backend.sync_bootstrap(filter, cx);
+            // Deletion requests (NIP-09/62) must be known before any
+            // announcement can be shown.
+            backend.sync_bootstrap(filters::deletions(), cx);
         });
     }
 
@@ -143,12 +149,18 @@ impl RepoListStore {
             };
 
             let events = client.database().query(filter).await?;
+            let deletion_events = client.database().query(filters::deletions()).await?;
+            let deletions = Deletions::from_events(deletion_events);
 
             // Dedup and sort off the main thread; only the final list
             // crosses back into the entity.
             let mut by_repo: HashMap<RepoAddr, Announcement> = HashMap::new();
 
             for event in events {
+                if deletions.is_deleted(&event) {
+                    continue;
+                }
+
                 let Some(announcement) = Announcement::from_event(&event) else {
                     continue;
                 };
@@ -175,6 +187,9 @@ impl RepoListStore {
 
             let state_filter = Filter::new().kind(Kind::RepoState);
             for event in client.database().query(state_filter).await? {
+                if deletions.is_deleted(&event) {
+                    continue;
+                }
                 let Some(id) = event.tags.identifier() else {
                     continue;
                 };
@@ -191,16 +206,10 @@ impl RepoListStore {
                 .kinds(filters::ACTIVITY_KINDS)
                 .since(Timestamp::now() - ACTIVITY_WINDOW);
             for event in client.database().query(activity_filter).await? {
-                for tag in event.tags.iter() {
-                    if tag.kind() != "a" {
-                        continue;
-                    }
-                    let Some(content) = tag.content() else {
-                        continue;
-                    };
-                    let Ok(addr) = Coordinate::parse(content) else {
-                        continue;
-                    };
+                if deletions.is_deleted(&event) {
+                    continue;
+                }
+                for addr in event.tags.coordinates() {
                     if addr.kind != Kind::GitRepoAnnouncement {
                         continue;
                     }