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lewis.moe
1use crate::api::read_after_write::{
2 extract_repo_rev, format_munged_response, get_local_lag, get_records_since_rev,
3 proxy_to_appview, FeedOutput, FeedViewPost, LikeRecord, PostView, RecordDescript,
4};
5use crate::state::AppState;
6use axum::{
7 extract::{Query, State},
8 http::StatusCode,
9 response::{IntoResponse, Response},
10 Json,
11};
12use serde::Deserialize;
13use serde_json::Value;
14use std::collections::HashMap;
15use tracing::warn;
16
17#[derive(Deserialize)]
18pub struct GetActorLikesParams {
19 pub actor: String,
20 pub limit: Option<u32>,
21 pub cursor: Option<String>,
22}
23
24fn insert_likes_into_feed(feed: &mut Vec<FeedViewPost>, likes: &[RecordDescript<LikeRecord>]) {
25 for like in likes {
26 let like_time = &like.indexed_at.to_rfc3339();
27 let idx = feed
28 .iter()
29 .position(|fi| &fi.post.indexed_at < like_time)
30 .unwrap_or(feed.len());
31 let placeholder_post = PostView {
32 uri: like.record.subject.uri.clone(),
33 cid: like.record.subject.cid.clone(),
34 author: crate::api::read_after_write::AuthorView {
35 did: String::new(),
36 handle: String::new(),
37 display_name: None,
38 avatar: None,
39 extra: HashMap::new(),
40 },
41 record: Value::Null,
42 indexed_at: like.indexed_at.to_rfc3339(),
43 embed: None,
44 reply_count: 0,
45 repost_count: 0,
46 like_count: 0,
47 quote_count: 0,
48 extra: HashMap::new(),
49 };
50 feed.insert(
51 idx,
52 FeedViewPost {
53 post: placeholder_post,
54 reply: None,
55 reason: None,
56 feed_context: None,
57 extra: HashMap::new(),
58 },
59 );
60 }
61}
62
63pub async fn get_actor_likes(
64 State(state): State<AppState>,
65 headers: axum::http::HeaderMap,
66 Query(params): Query<GetActorLikesParams>,
67) -> Response {
68 let auth_header = headers.get("Authorization").and_then(|h| h.to_str().ok());
69 let auth_did = if let Some(h) = auth_header {
70 if let Some(token) = crate::auth::extract_bearer_token_from_header(Some(h)) {
71 match crate::auth::validate_bearer_token(&state.db, &token).await {
72 Ok(user) => Some(user.did),
73 Err(_) => None,
74 }
75 } else {
76 None
77 }
78 } else {
79 None
80 };
81 let mut query_params = HashMap::new();
82 query_params.insert("actor".to_string(), params.actor.clone());
83 if let Some(limit) = params.limit {
84 query_params.insert("limit".to_string(), limit.to_string());
85 }
86 if let Some(cursor) = ¶ms.cursor {
87 query_params.insert("cursor".to_string(), cursor.clone());
88 }
89 let proxy_result =
90 match proxy_to_appview("app.bsky.feed.getActorLikes", &query_params, auth_header).await {
91 Ok(r) => r,
92 Err(e) => return e,
93 };
94 if !proxy_result.status.is_success() {
95 return (proxy_result.status, proxy_result.body).into_response();
96 }
97 let rev = match extract_repo_rev(&proxy_result.headers) {
98 Some(r) => r,
99 None => return (proxy_result.status, proxy_result.body).into_response(),
100 };
101 let mut feed_output: FeedOutput = match serde_json::from_slice(&proxy_result.body) {
102 Ok(f) => f,
103 Err(e) => {
104 warn!("Failed to parse actor likes response: {:?}", e);
105 return (proxy_result.status, proxy_result.body).into_response();
106 }
107 };
108 let requester_did = match auth_did {
109 Some(d) => d,
110 None => return (StatusCode::OK, Json(feed_output)).into_response(),
111 };
112 let actor_did = if params.actor.starts_with("did:") {
113 params.actor.clone()
114 } else {
115 let hostname = std::env::var("PDS_HOSTNAME").unwrap_or_else(|_| "localhost".to_string());
116 let suffix = format!(".{}", hostname);
117 let short_handle = if params.actor.ends_with(&suffix) {
118 params.actor.strip_suffix(&suffix).unwrap_or(¶ms.actor)
119 } else {
120 ¶ms.actor
121 };
122 match sqlx::query_scalar!("SELECT did FROM users WHERE handle = $1", short_handle)
123 .fetch_optional(&state.db)
124 .await
125 {
126 Ok(Some(did)) => did,
127 Ok(None) => return (StatusCode::OK, Json(feed_output)).into_response(),
128 Err(e) => {
129 warn!("Database error resolving actor handle: {:?}", e);
130 return (proxy_result.status, proxy_result.body).into_response();
131 }
132 }
133 };
134 if actor_did != requester_did {
135 return (StatusCode::OK, Json(feed_output)).into_response();
136 }
137 let local_records = match get_records_since_rev(&state, &requester_did, &rev).await {
138 Ok(r) => r,
139 Err(e) => {
140 warn!("Failed to get local records: {}", e);
141 return (proxy_result.status, proxy_result.body).into_response();
142 }
143 };
144 if local_records.likes.is_empty() {
145 return (StatusCode::OK, Json(feed_output)).into_response();
146 }
147 insert_likes_into_feed(&mut feed_output.feed, &local_records.likes);
148 let lag = get_local_lag(&local_records);
149 format_munged_response(feed_output, lag)
150}