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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 ProfileRecord, RecordDescript,
5};
6use crate::state::AppState;
7use axum::{
8 extract::{Query, State},
9 http::StatusCode,
10 response::{IntoResponse, Response},
11 Json,
12};
13use serde::Deserialize;
14use std::collections::HashMap;
15use tracing::warn;
16
17#[derive(Deserialize)]
18pub struct GetAuthorFeedParams {
19 pub actor: String,
20 pub limit: Option<u32>,
21 pub cursor: Option<String>,
22 pub filter: Option<String>,
23 #[serde(rename = "includePins")]
24 pub include_pins: Option<bool>,
25}
26
27fn update_author_profile_in_feed(
28 feed: &mut [FeedViewPost],
29 author_did: &str,
30 local_profile: &RecordDescript<ProfileRecord>,
31) {
32 for item in feed.iter_mut() {
33 if item.post.author.did == author_did {
34 if let Some(ref display_name) = local_profile.record.display_name {
35 item.post.author.display_name = Some(display_name.clone());
36 }
37 }
38 }
39}
40
41pub async fn get_author_feed(
42 State(state): State<AppState>,
43 headers: axum::http::HeaderMap,
44 Query(params): Query<GetAuthorFeedParams>,
45) -> Response {
46 let auth_header = headers.get("Authorization").and_then(|h| h.to_str().ok());
47
48 let auth_did = if let Some(h) = auth_header {
49 if let Some(token) = crate::auth::extract_bearer_token_from_header(Some(h)) {
50 match crate::auth::validate_bearer_token(&state.db, &token).await {
51 Ok(user) => Some(user.did),
52 Err(_) => None,
53 }
54 } else {
55 None
56 }
57 } else {
58 None
59 };
60
61 let mut query_params = HashMap::new();
62 query_params.insert("actor".to_string(), params.actor.clone());
63 if let Some(limit) = params.limit {
64 query_params.insert("limit".to_string(), limit.to_string());
65 }
66 if let Some(cursor) = ¶ms.cursor {
67 query_params.insert("cursor".to_string(), cursor.clone());
68 }
69 if let Some(filter) = ¶ms.filter {
70 query_params.insert("filter".to_string(), filter.clone());
71 }
72 if let Some(include_pins) = params.include_pins {
73 query_params.insert("includePins".to_string(), include_pins.to_string());
74 }
75
76 let proxy_result =
77 match proxy_to_appview("app.bsky.feed.getAuthorFeed", &query_params, auth_header).await {
78 Ok(r) => r,
79 Err(e) => return e,
80 };
81
82 if !proxy_result.status.is_success() {
83 return (proxy_result.status, proxy_result.body).into_response();
84 }
85
86 let rev = match extract_repo_rev(&proxy_result.headers) {
87 Some(r) => r,
88 None => return (proxy_result.status, proxy_result.body).into_response(),
89 };
90
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 author feed response: {:?}", e);
95 return (proxy_result.status, proxy_result.body).into_response();
96 }
97 };
98
99 let requester_did = match auth_did {
100 Some(d) => d,
101 None => return (StatusCode::OK, Json(feed_output)).into_response(),
102 };
103
104 let actor_did = if params.actor.starts_with("did:") {
105 params.actor.clone()
106 } else {
107 let hostname = std::env::var("PDS_HOSTNAME").unwrap_or_else(|_| "localhost".to_string());
108 let suffix = format!(".{}", hostname);
109 let short_handle = if params.actor.ends_with(&suffix) {
110 params.actor.strip_suffix(&suffix).unwrap_or(¶ms.actor)
111 } else {
112 ¶ms.actor
113 };
114 match sqlx::query_scalar!("SELECT did FROM users WHERE handle = $1", short_handle)
115 .fetch_optional(&state.db)
116 .await
117 {
118 Ok(Some(did)) => did,
119 Ok(None) => return (StatusCode::OK, Json(feed_output)).into_response(),
120 Err(e) => {
121 warn!("Database error resolving actor handle: {:?}", e);
122 return (proxy_result.status, proxy_result.body).into_response();
123 }
124 }
125 };
126
127 if actor_did != requester_did {
128 return (StatusCode::OK, Json(feed_output)).into_response();
129 }
130
131 let local_records = match get_records_since_rev(&state, &requester_did, &rev).await {
132 Ok(r) => r,
133 Err(e) => {
134 warn!("Failed to get local records: {}", e);
135 return (proxy_result.status, proxy_result.body).into_response();
136 }
137 };
138
139 if local_records.count == 0 {
140 return (StatusCode::OK, Json(feed_output)).into_response();
141 }
142
143 let handle = match sqlx::query_scalar!("SELECT handle FROM users WHERE did = $1", requester_did)
144 .fetch_optional(&state.db)
145 .await
146 {
147 Ok(Some(h)) => h,
148 Ok(None) => requester_did.clone(),
149 Err(e) => {
150 warn!("Database error fetching handle: {:?}", e);
151 requester_did.clone()
152 }
153 };
154
155 if let Some(ref local_profile) = local_records.profile {
156 update_author_profile_in_feed(&mut feed_output.feed, &requester_did, local_profile);
157 }
158
159 let local_posts: Vec<_> = local_records
160 .posts
161 .iter()
162 .map(|p| {
163 format_local_post(
164 p,
165 &requester_did,
166 &handle,
167 local_records.profile.as_ref(),
168 )
169 })
170 .collect();
171
172 insert_posts_into_feed(&mut feed_output.feed, local_posts);
173
174 let lag = get_local_lag(&local_records);
175 format_munged_response(feed_output, lag)
176}