lemmy/crates/api_common/src/lib.rs

420 lines
11 KiB
Rust

pub mod comment;
pub mod community;
pub mod person;
pub mod post;
pub mod site;
pub mod websocket;
use crate::site::FederatedInstances;
use diesel::PgConnection;
use lemmy_db_queries::{
source::{
community::{CommunityModerator_, Community_},
site::Site_,
},
Crud,
DbPool,
};
use lemmy_db_schema::{
source::{
comment::Comment,
community::{Community, CommunityModerator},
person::Person,
person_mention::{PersonMention, PersonMentionForm},
post::Post,
site::Site,
},
CommunityId,
LocalUserId,
PersonId,
PostId,
};
use lemmy_db_views::local_user_view::{LocalUserSettingsView, LocalUserView};
use lemmy_db_views_actor::{
community_person_ban_view::CommunityPersonBanView,
community_view::CommunityView,
};
use lemmy_utils::{
claims::Claims,
email::send_email,
settings::structs::Settings,
utils::MentionData,
ApiError,
LemmyError,
};
use log::error;
use serde::{Deserialize, Serialize};
use url::Url;
#[derive(Serialize, Deserialize, Debug)]
pub struct WebFingerLink {
pub rel: Option<String>,
#[serde(rename(serialize = "type", deserialize = "type"))]
pub type_: Option<String>,
pub href: Option<Url>,
#[serde(skip_serializing_if = "Option::is_none")]
pub template: Option<String>,
}
#[derive(Serialize, Deserialize, Debug)]
pub struct WebFingerResponse {
pub subject: String,
pub aliases: Vec<Url>,
pub links: Vec<WebFingerLink>,
}
pub async fn blocking<F, T>(pool: &DbPool, f: F) -> Result<T, LemmyError>
where
F: FnOnce(&diesel::PgConnection) -> T + Send + 'static,
T: Send + 'static,
{
let pool = pool.clone();
let res = actix_web::web::block(move || {
let conn = pool.get()?;
let res = (f)(&conn);
Ok(res) as Result<_, LemmyError>
})
.await?;
Ok(res)
}
pub async fn send_local_notifs(
mentions: Vec<MentionData>,
comment: Comment,
person: Person,
post: Post,
pool: &DbPool,
do_send_email: bool,
) -> Result<Vec<LocalUserId>, LemmyError> {
let ids = blocking(pool, move |conn| {
do_send_local_notifs(conn, &mentions, &comment, &person, &post, do_send_email)
})
.await?;
Ok(ids)
}
fn do_send_local_notifs(
conn: &PgConnection,
mentions: &[MentionData],
comment: &Comment,
person: &Person,
post: &Post,
do_send_email: bool,
) -> Vec<LocalUserId> {
let mut recipient_ids = Vec::new();
// Send the local mentions
for mention in mentions
.iter()
.filter(|m| m.is_local() && m.name.ne(&person.name))
.collect::<Vec<&MentionData>>()
{
if let Ok(mention_user_view) = LocalUserView::read_from_name(&conn, &mention.name) {
// TODO
// At some point, make it so you can't tag the parent creator either
// This can cause two notifications, one for reply and the other for mention
recipient_ids.push(mention_user_view.local_user.id);
let user_mention_form = PersonMentionForm {
recipient_id: mention_user_view.person.id,
comment_id: comment.id,
read: None,
};
// Allow this to fail softly, since comment edits might re-update or replace it
// Let the uniqueness handle this fail
PersonMention::create(&conn, &user_mention_form).ok();
// Send an email to those local users that have notifications on
if do_send_email {
send_email_to_user(
&mention_user_view,
"Mentioned by",
"Person Mention",
&comment.content,
)
}
}
}
// Send notifs to the parent commenter / poster
match comment.parent_id {
Some(parent_id) => {
if let Ok(parent_comment) = Comment::read(&conn, parent_id) {
// Don't send a notif to yourself
if parent_comment.creator_id != person.id {
// Get the parent commenter local_user
if let Ok(parent_user_view) = LocalUserView::read_person(&conn, parent_comment.creator_id)
{
recipient_ids.push(parent_user_view.local_user.id);
if do_send_email {
send_email_to_user(
&parent_user_view,
"Reply from",
"Comment Reply",
&comment.content,
)
}
}
}
}
}
// Its a post
None => {
if post.creator_id != person.id {
if let Ok(parent_user_view) = LocalUserView::read_person(&conn, post.creator_id) {
recipient_ids.push(parent_user_view.local_user.id);
if do_send_email {
send_email_to_user(
&parent_user_view,
"Reply from",
"Post Reply",
&comment.content,
)
}
}
}
}
};
recipient_ids
}
pub fn send_email_to_user(
local_user_view: &LocalUserView,
subject_text: &str,
body_text: &str,
comment_content: &str,
) {
if local_user_view.person.banned || !local_user_view.local_user.send_notifications_to_email {
return;
}
if let Some(user_email) = &local_user_view.local_user.email {
let subject = &format!(
"{} - {} {}",
subject_text,
Settings::get().hostname(),
local_user_view.person.name,
);
let html = &format!(
"<h1>{}</h1><br><div>{} - {}</div><br><a href={}/inbox>inbox</a>",
body_text,
local_user_view.person.name,
comment_content,
Settings::get().get_protocol_and_hostname()
);
match send_email(subject, &user_email, &local_user_view.person.name, html) {
Ok(_o) => _o,
Err(e) => error!("{}", e),
};
}
}
pub async fn is_mod_or_admin(
pool: &DbPool,
person_id: PersonId,
community_id: CommunityId,
) -> Result<(), LemmyError> {
let is_mod_or_admin = blocking(pool, move |conn| {
CommunityView::is_mod_or_admin(conn, person_id, community_id)
})
.await?;
if !is_mod_or_admin {
return Err(ApiError::err("not_a_mod_or_admin").into());
}
Ok(())
}
pub fn is_admin(local_user_view: &LocalUserView) -> Result<(), LemmyError> {
if !local_user_view.person.admin {
return Err(ApiError::err("not_an_admin").into());
}
Ok(())
}
pub async fn get_post(post_id: PostId, pool: &DbPool) -> Result<Post, LemmyError> {
match blocking(pool, move |conn| Post::read(conn, post_id)).await? {
Ok(post) => Ok(post),
Err(_e) => Err(ApiError::err("couldnt_find_post").into()),
}
}
pub async fn get_local_user_view_from_jwt(
jwt: &str,
pool: &DbPool,
) -> Result<LocalUserView, LemmyError> {
let claims = match Claims::decode(&jwt) {
Ok(claims) => claims.claims,
Err(_e) => return Err(ApiError::err("not_logged_in").into()),
};
let local_user_id = LocalUserId(claims.sub);
let local_user_view =
blocking(pool, move |conn| LocalUserView::read(conn, local_user_id)).await??;
// Check for a site ban
if local_user_view.person.banned {
return Err(ApiError::err("site_ban").into());
}
check_validator_time(&local_user_view.local_user.validator_time, &claims)?;
Ok(local_user_view)
}
/// Checks if user's token was issued before user's password reset.
pub fn check_validator_time(
validator_time: &chrono::NaiveDateTime,
claims: &Claims,
) -> Result<(), LemmyError> {
let user_validation_time = validator_time.timestamp();
if user_validation_time > claims.iat {
Err(ApiError::err("not_logged_in").into())
} else {
Ok(())
}
}
pub async fn get_local_user_view_from_jwt_opt(
jwt: &Option<String>,
pool: &DbPool,
) -> Result<Option<LocalUserView>, LemmyError> {
match jwt {
Some(jwt) => Ok(Some(get_local_user_view_from_jwt(jwt, pool).await?)),
None => Ok(None),
}
}
pub async fn get_local_user_settings_view_from_jwt(
jwt: &str,
pool: &DbPool,
) -> Result<LocalUserSettingsView, LemmyError> {
let claims = match Claims::decode(&jwt) {
Ok(claims) => claims.claims,
Err(_e) => return Err(ApiError::err("not_logged_in").into()),
};
let local_user_id = LocalUserId(claims.sub);
let local_user_view = blocking(pool, move |conn| {
LocalUserSettingsView::read(conn, local_user_id)
})
.await??;
// Check for a site ban
if local_user_view.person.banned {
return Err(ApiError::err("site_ban").into());
}
check_validator_time(&local_user_view.local_user.validator_time, &claims)?;
Ok(local_user_view)
}
pub async fn get_local_user_settings_view_from_jwt_opt(
jwt: &Option<String>,
pool: &DbPool,
) -> Result<Option<LocalUserSettingsView>, LemmyError> {
match jwt {
Some(jwt) => Ok(Some(
get_local_user_settings_view_from_jwt(jwt, pool).await?,
)),
None => Ok(None),
}
}
pub async fn check_community_ban(
person_id: PersonId,
community_id: CommunityId,
pool: &DbPool,
) -> Result<(), LemmyError> {
let is_banned =
move |conn: &'_ _| CommunityPersonBanView::get(conn, person_id, community_id).is_ok();
if blocking(pool, is_banned).await? {
Err(ApiError::err("community_ban").into())
} else {
Ok(())
}
}
pub async fn check_downvotes_enabled(score: i16, pool: &DbPool) -> Result<(), LemmyError> {
if score == -1 {
let site = blocking(pool, move |conn| Site::read_simple(conn)).await??;
if !site.enable_downvotes {
return Err(ApiError::err("downvotes_disabled").into());
}
}
Ok(())
}
/// Returns a list of communities that the user moderates
/// or if a community_id is supplied validates the user is a moderator
/// of that community and returns the community id in a vec
///
/// * `person_id` - the person id of the moderator
/// * `community_id` - optional community id to check for moderator privileges
/// * `pool` - the diesel db pool
pub async fn collect_moderated_communities(
person_id: PersonId,
community_id: Option<CommunityId>,
pool: &DbPool,
) -> Result<Vec<CommunityId>, LemmyError> {
if let Some(community_id) = community_id {
// if the user provides a community_id, just check for mod/admin privileges
is_mod_or_admin(pool, person_id, community_id).await?;
Ok(vec![community_id])
} else {
let ids = blocking(pool, move |conn: &'_ _| {
CommunityModerator::get_person_moderated_communities(conn, person_id)
})
.await??;
Ok(ids)
}
}
pub async fn build_federated_instances(
pool: &DbPool,
) -> Result<Option<FederatedInstances>, LemmyError> {
if Settings::get().federation().enabled {
let distinct_communities = blocking(pool, move |conn| {
Community::distinct_federated_communities(conn)
})
.await??;
let allowed = Settings::get().get_allowed_instances();
let blocked = Settings::get().get_blocked_instances();
let mut linked = distinct_communities
.iter()
.map(|actor_id| Ok(Url::parse(actor_id)?.host_str().unwrap_or("").to_string()))
.collect::<Result<Vec<String>, LemmyError>>()?;
if let Some(allowed) = allowed.as_ref() {
linked.extend_from_slice(allowed);
}
if let Some(blocked) = blocked.as_ref() {
linked.retain(|a| !blocked.contains(a) && !a.eq(&Settings::get().hostname()));
}
// Sort and remove dupes
linked.sort_unstable();
linked.dedup();
Ok(Some(FederatedInstances {
linked,
allowed,
blocked,
}))
} else {
Ok(None)
}
}
/// Checks the password length
pub fn password_length_check(pass: &str) -> Result<(), LemmyError> {
if pass.len() > 60 {
Err(ApiError::err("invalid_password").into())
} else {
Ok(())
}
}