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lewis.moe
1use crate::api::read_after_write::{
2 extract_repo_rev, format_local_post, format_munged_response, get_local_lag,
3 get_records_since_rev, insert_posts_into_feed, proxy_to_appview, FeedOutput, FeedViewPost,
4 PostView,
5};
6use crate::state::AppState;
7use axum::{
8 extract::{Query, State},
9 http::StatusCode,
10 response::{IntoResponse, Response},
11 Json,
12};
13use jacquard_repo::storage::BlockStore;
14use serde::Deserialize;
15use serde_json::{json, Value};
16use std::collections::HashMap;
17use tracing::warn;
18
19#[derive(Deserialize)]
20pub struct GetTimelineParams {
21 pub algorithm: Option<String>,
22 pub limit: Option<u32>,
23 pub cursor: Option<String>,
24}
25
26pub async fn get_timeline(
27 State(state): State<AppState>,
28 headers: axum::http::HeaderMap,
29 Query(params): Query<GetTimelineParams>,
30) -> Response {
31 let token = match crate::auth::extract_bearer_token_from_header(
32 headers.get("Authorization").and_then(|h| h.to_str().ok()),
33 ) {
34 Some(t) => t,
35 None => {
36 return (
37 StatusCode::UNAUTHORIZED,
38 Json(json!({"error": "AuthenticationRequired"})),
39 )
40 .into_response();
41 }
42 };
43 let auth_user = match crate::auth::validate_bearer_token(&state.db, &token).await {
44 Ok(user) => user,
45 Err(_) => {
46 return (
47 StatusCode::UNAUTHORIZED,
48 Json(json!({"error": "AuthenticationFailed"})),
49 )
50 .into_response();
51 }
52 };
53 match std::env::var("APPVIEW_URL") {
54 Ok(url) if !url.starts_with("http://127.0.0.1") => {
55 return get_timeline_with_appview(&state, ¶ms, &auth_user.did, auth_user.key_bytes.as_deref()).await;
56 }
57 _ => {}
58 }
59 get_timeline_local_only(&state, &auth_user.did).await
60}
61
62async fn get_timeline_with_appview(
63 state: &AppState,
64 params: &GetTimelineParams,
65 auth_did: &str,
66 auth_key_bytes: Option<&[u8]>,
67) -> Response {
68 let mut query_params = HashMap::new();
69 if let Some(algo) = ¶ms.algorithm {
70 query_params.insert("algorithm".to_string(), algo.clone());
71 }
72 if let Some(limit) = params.limit {
73 query_params.insert("limit".to_string(), limit.to_string());
74 }
75 if let Some(cursor) = ¶ms.cursor {
76 query_params.insert("cursor".to_string(), cursor.clone());
77 }
78 let proxy_result =
79 match proxy_to_appview("app.bsky.feed.getTimeline", &query_params, auth_did, auth_key_bytes).await {
80 Ok(r) => r,
81 Err(e) => return e,
82 };
83 if !proxy_result.status.is_success() {
84 return proxy_result.into_response();
85 }
86 let rev = extract_repo_rev(&proxy_result.headers);
87 if rev.is_none() {
88 return proxy_result.into_response();
89 }
90 let rev = rev.unwrap();
91 let mut feed_output: FeedOutput = match serde_json::from_slice(&proxy_result.body) {
92 Ok(f) => f,
93 Err(e) => {
94 warn!("Failed to parse timeline response: {:?}", e);
95 return proxy_result.into_response();
96 }
97 };
98 let local_records = match get_records_since_rev(state, auth_did, &rev).await {
99 Ok(r) => r,
100 Err(e) => {
101 warn!("Failed to get local records: {}", e);
102 return proxy_result.into_response();
103 }
104 };
105 if local_records.count == 0 {
106 return proxy_result.into_response();
107 }
108 let handle = match sqlx::query_scalar!("SELECT handle FROM users WHERE did = $1", auth_did)
109 .fetch_optional(&state.db)
110 .await
111 {
112 Ok(Some(h)) => h,
113 Ok(None) => auth_did.to_string(),
114 Err(e) => {
115 warn!("Database error fetching handle: {:?}", e);
116 auth_did.to_string()
117 }
118 };
119 let local_posts: Vec<_> = local_records
120 .posts
121 .iter()
122 .map(|p| format_local_post(p, auth_did, &handle, local_records.profile.as_ref()))
123 .collect();
124 insert_posts_into_feed(&mut feed_output.feed, local_posts);
125 let lag = get_local_lag(&local_records);
126 format_munged_response(feed_output, lag)
127}
128
129async fn get_timeline_local_only(state: &AppState, auth_did: &str) -> Response {
130 let user_id: uuid::Uuid = match sqlx::query_scalar!(
131 "SELECT id FROM users WHERE did = $1",
132 auth_did
133 )
134 .fetch_optional(&state.db)
135 .await
136 {
137 Ok(Some(id)) => id,
138 Ok(None) => {
139 return (
140 StatusCode::INTERNAL_SERVER_ERROR,
141 Json(json!({"error": "InternalError", "message": "User not found"})),
142 )
143 .into_response();
144 }
145 Err(e) => {
146 warn!("Database error fetching user: {:?}", e);
147 return (
148 StatusCode::INTERNAL_SERVER_ERROR,
149 Json(json!({"error": "InternalError", "message": "Database error"})),
150 )
151 .into_response();
152 }
153 };
154 let follows_query = sqlx::query!(
155 "SELECT record_cid FROM records WHERE repo_id = $1 AND collection = 'app.bsky.graph.follow' LIMIT 5000",
156 user_id
157 )
158 .fetch_all(&state.db)
159 .await;
160 let follow_cids: Vec<String> = match follows_query {
161 Ok(rows) => rows.iter().map(|r| r.record_cid.clone()).collect(),
162 Err(_) => {
163 return (
164 StatusCode::INTERNAL_SERVER_ERROR,
165 Json(json!({"error": "InternalError"})),
166 )
167 .into_response();
168 }
169 };
170 let mut followed_dids: Vec<String> = Vec::new();
171 for cid_str in follow_cids {
172 let cid = match cid_str.parse::<cid::Cid>() {
173 Ok(c) => c,
174 Err(_) => continue,
175 };
176 let block_bytes = match state.block_store.get(&cid).await {
177 Ok(Some(b)) => b,
178 _ => continue,
179 };
180 let record: Value = match serde_ipld_dagcbor::from_slice(&block_bytes) {
181 Ok(v) => v,
182 Err(_) => continue,
183 };
184 if let Some(subject) = record.get("subject").and_then(|s| s.as_str()) {
185 followed_dids.push(subject.to_string());
186 }
187 }
188 if followed_dids.is_empty() {
189 return (
190 StatusCode::OK,
191 Json(FeedOutput {
192 feed: vec![],
193 cursor: None,
194 }),
195 )
196 .into_response();
197 }
198 let posts_result = sqlx::query!(
199 "SELECT r.record_cid, r.rkey, r.created_at, u.did, u.handle
200 FROM records r
201 JOIN repos rp ON r.repo_id = rp.user_id
202 JOIN users u ON rp.user_id = u.id
203 WHERE u.did = ANY($1) AND r.collection = 'app.bsky.feed.post'
204 ORDER BY r.created_at DESC
205 LIMIT 50",
206 &followed_dids
207 )
208 .fetch_all(&state.db)
209 .await;
210 let posts = match posts_result {
211 Ok(rows) => rows,
212 Err(_) => {
213 return (
214 StatusCode::INTERNAL_SERVER_ERROR,
215 Json(json!({"error": "InternalError"})),
216 )
217 .into_response();
218 }
219 };
220 let mut feed: Vec<FeedViewPost> = Vec::new();
221 for row in posts {
222 let record_cid: String = row.record_cid;
223 let rkey: String = row.rkey;
224 let created_at: chrono::DateTime<chrono::Utc> = row.created_at;
225 let author_did: String = row.did;
226 let author_handle: String = row.handle;
227 let cid = match record_cid.parse::<cid::Cid>() {
228 Ok(c) => c,
229 Err(_) => continue,
230 };
231 let block_bytes = match state.block_store.get(&cid).await {
232 Ok(Some(b)) => b,
233 _ => continue,
234 };
235 let record: Value = match serde_ipld_dagcbor::from_slice(&block_bytes) {
236 Ok(v) => v,
237 Err(_) => continue,
238 };
239 let uri = format!("at://{}/app.bsky.feed.post/{}", author_did, rkey);
240 feed.push(FeedViewPost {
241 post: PostView {
242 uri,
243 cid: record_cid,
244 author: crate::api::read_after_write::AuthorView {
245 did: author_did,
246 handle: author_handle,
247 display_name: None,
248 avatar: None,
249 extra: HashMap::new(),
250 },
251 record,
252 indexed_at: created_at.to_rfc3339(),
253 embed: None,
254 reply_count: 0,
255 repost_count: 0,
256 like_count: 0,
257 quote_count: 0,
258 extra: HashMap::new(),
259 },
260 reply: None,
261 reason: None,
262 feed_context: None,
263 extra: HashMap::new(),
264 });
265 }
266 (StatusCode::OK, Json(FeedOutput { feed, cursor: None })).into_response()
267}