maarcadetweet: initial commit

AT Protocol PDS + AppView + Tauri Desktop Client, 160-char post limit. - PDS (Rust + axum + sqlx) - Auth: createAccount, createSession, refreshSession - Records: createRecord, deleteRecord (race-safe via SELECT FOR UPDATE) - Feed: feed.like.create, feed.repost.create - Sync: getRepo, getBlocks, getLatestCommit, getRecord (with MST proof), listRepos - Identity: resolveHandle - MST: spec-conformant (at-mst crate, 27 tests) - Repo: signed commits, TID counter (monotonic, 4096 wrap safe) - AppView (Rust + axum + sqlx) - Jetstream consumer (WebSocket, exponential backoff, 38k+ events indexed) - REST API: timeline/home (graph-aware), profile, search, post (with thread hydration) - Handle-sync worker (did:plc + did:web) - JSONB embed storage + thread columns (migration 0003) - Like/repost counter cache (migration 0004) - Tauri 2 + Svelte 5 Desktop Client - System tray (Show/Compose/Quit menu) - OS notifications (tauri-plugin-notification) - Auto-update (tauri-plugin-updater, placeholder endpoint) - Window-state (tauri-plugin-window-state) - 160-char compose with live counter - Image/Link embed rendering - LocalStorage-persisted like state - Timeline with poll (prepend new posts) - Custom TitleBar (transparent, no decorations) - Orange/IBM Plex Mono maarcade design Tests: 231 Rust + 9 vitest = 240 passed.
2026-07-05 20:01:31 +02:00
commit c586fd39c9
134 changed files with 35279 additions and 0 deletions
@@ -0,0 +1,80 @@
+use anyhow::Result;
+use async_trait::async_trait;
+use at_shared::did::Did;
+
+/// Resolve a human-readable handle (`alice.bsky.social`) to its [`Did`].
+///
+/// Distinct from [`DidHandleResolver`], which is the inverse — it resolves
+/// a DID back to its current handle. Both live in the same module so the
+/// AppView's handle-sync worker can plug in a stub for tests.
+#[async_trait]
+pub trait HandleResolver: Send + Sync {
+    async fn resolve(&self, handle: &str) -> Result<Option<Did>>;
+}
+
+/// Resolve a DID (e.g. `did:plc:...`) to its current handle, if known.
+///
+/// Returns `Ok(None)` — never `Err` — when the handle can't be determined
+/// for legitimate reasons (e.g. unknown DID or unsupported method such as
+/// `did:web:`). `Err(_)` is reserved for genuine network / protocol
+/// failures so the worker can distinguish "nothing to do" from "try again
+/// next pass".
+#[async_trait]
+pub trait DidHandleResolver: Send + Sync {
+    async fn resolve_handle(&self, did: &str) -> Result<Option<String>>;
+}
+
+pub struct WellKnownResolver {
+    pub client: reqwest::Client,
+    pub dns_zone: String,
+}
+
+impl WellKnownResolver {
+    pub fn new(dns_zone: String) -> Self {
+        Self {
+            client: reqwest::Client::builder()
+                .timeout(std::time::Duration::from_secs(5))
+                .build()
+                .unwrap(),
+            dns_zone,
+        }
+    }
+}
+
+#[async_trait]
+impl HandleResolver for WellKnownResolver {
+    async fn resolve(&self, handle: &str) -> Result<Option<Did>> {
+        if let Some(zone) = handle.strip_prefix('@') {
+            if zone.ends_with(&self.dns_zone.trim_start_matches('.')) {
+                let user = handle.trim_start_matches('@').trim_end_matches(&self.dns_zone);
+                if let Some(did) = self.lookup_local(user).await? {
+                    return Ok(Some(did));
+                }
+            }
+        }
+        if let Ok(resp) = self
+            .client
+            .get(format!("https://{}/.well-known/atproto-did", handle))
+            .send()
+            .await
+        {
+            if resp.status().is_success() {
+                let body = resp.text().await?;
+                let did: Did = body.trim().parse()?;
+                return Ok(Some(did));
+            }
+        }
+        Ok(None)
+    }
+}
+
+impl WellKnownResolver {
+    async fn lookup_local(&self, user: &str) -> Result<Option<Did>> {
+        let _ = user;
+        Ok(None)
+    }
+}
+
+pub async fn resolve_handle(handle: &str, resolver: &dyn HandleResolver) -> Result<Option<Did>> {
+    resolver.resolve(handle).await
+}