lemmy/crates/api/src/lib.rs

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use actix_web::{web, web::Data};
use lemmy_db_queries::{
source::{
community::{CommunityModerator_, Community_},
site::Site_,
user::UserSafeSettings_,
},
Crud,
DbPool,
};
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use lemmy_db_schema::source::{
community::{Community, CommunityModerator},
post::Post,
site::Site,
user::{UserSafeSettings, User_},
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};
use lemmy_db_views_actor::{
community_user_ban_view::CommunityUserBanView,
community_view::CommunityView,
};
use lemmy_structs::{blocking, comment::*, community::*, post::*, site::*, user::*, websocket::*};
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use lemmy_utils::{claims::Claims, settings::Settings, ApiError, ConnectionId, LemmyError};
use lemmy_websocket::{serialize_websocket_message, LemmyContext, UserOperation};
use serde::Deserialize;
use std::process::Command;
use url::Url;
pub mod comment;
pub mod community;
pub mod post;
pub mod routes;
pub mod site;
pub mod user;
pub mod websocket;
#[async_trait::async_trait(?Send)]
pub trait Perform {
type Response: serde::ser::Serialize + Send;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<Self::Response, LemmyError>;
}
pub(crate) async fn is_mod_or_admin(
pool: &DbPool,
user_id: i32,
community_id: i32,
) -> Result<(), LemmyError> {
let is_mod_or_admin = blocking(pool, move |conn| {
CommunityView::is_mod_or_admin(conn, user_id, community_id)
})
.await?;
if !is_mod_or_admin {
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return Err(ApiError::err("not_a_mod_or_admin").into());
}
Ok(())
}
pub async fn is_admin(pool: &DbPool, user_id: i32) -> Result<(), LemmyError> {
let user = blocking(pool, move |conn| User_::read(conn, user_id)).await??;
if !user.admin {
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return Err(ApiError::err("not_an_admin").into());
}
Ok(())
}
pub(crate) async fn get_post(post_id: i32, pool: &DbPool) -> Result<Post, LemmyError> {
match blocking(pool, move |conn| Post::read(conn, post_id)).await? {
Ok(post) => Ok(post),
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Err(_e) => Err(ApiError::err("couldnt_find_post").into()),
}
}
pub(crate) async fn get_user_from_jwt(jwt: &str, pool: &DbPool) -> Result<User_, LemmyError> {
let claims = match Claims::decode(&jwt) {
Ok(claims) => claims.claims,
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Err(_e) => return Err(ApiError::err("not_logged_in").into()),
};
let user_id = claims.id;
let user = blocking(pool, move |conn| User_::read(conn, user_id)).await??;
// Check for a site ban
if user.banned {
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return Err(ApiError::err("site_ban").into());
}
Ok(user)
}
pub(crate) async fn get_user_from_jwt_opt(
jwt: &Option<String>,
pool: &DbPool,
) -> Result<Option<User_>, LemmyError> {
match jwt {
Some(jwt) => Ok(Some(get_user_from_jwt(jwt, pool).await?)),
None => Ok(None),
}
}
pub(crate) async fn get_user_safe_settings_from_jwt(
jwt: &str,
pool: &DbPool,
) -> Result<UserSafeSettings, LemmyError> {
let claims = match Claims::decode(&jwt) {
Ok(claims) => claims.claims,
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Err(_e) => return Err(ApiError::err("not_logged_in").into()),
};
let user_id = claims.id;
let user = blocking(pool, move |conn| UserSafeSettings::read(conn, user_id)).await??;
// Check for a site ban
if user.banned {
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return Err(ApiError::err("site_ban").into());
}
Ok(user)
}
pub(crate) async fn get_user_safe_settings_from_jwt_opt(
jwt: &Option<String>,
pool: &DbPool,
) -> Result<Option<UserSafeSettings>, LemmyError> {
match jwt {
Some(jwt) => Ok(Some(get_user_safe_settings_from_jwt(jwt, pool).await?)),
None => Ok(None),
}
}
pub(crate) async fn check_community_ban(
user_id: i32,
community_id: i32,
pool: &DbPool,
) -> Result<(), LemmyError> {
let is_banned = move |conn: &'_ _| CommunityUserBanView::get(conn, user_id, community_id).is_ok();
if blocking(pool, is_banned).await? {
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Err(ApiError::err("community_ban").into())
} else {
Ok(())
}
}
pub(crate) 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 {
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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
///
/// * `user_id` - the user id of the moderator
/// * `community_id` - optional community id to check for moderator privileges
/// * `pool` - the diesel db pool
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pub(crate) async fn collect_moderated_communities(
user_id: i32,
community_id: Option<i32>,
pool: &DbPool,
) -> Result<Vec<i32>, 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, user_id, community_id).await?;
Ok(vec![community_id])
} else {
let ids = blocking(pool, move |conn: &'_ _| {
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CommunityModerator::get_person_moderated_communities(conn, user_id)
})
.await??;
Ok(ids)
}
}
pub(crate) fn check_optional_url(item: &Option<Option<String>>) -> Result<(), LemmyError> {
if let Some(Some(item)) = &item {
if Url::parse(item).is_err() {
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return Err(ApiError::err("invalid_url").into());
}
}
Ok(())
}
pub(crate) 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>>()?;
linked.extend_from_slice(&allowed);
linked.retain(|a| !blocked.contains(a) && !a.eq("") && !a.eq(&Settings::get().hostname));
// Sort and remove dupes
linked.sort_unstable();
linked.dedup();
Ok(Some(FederatedInstances {
linked,
allowed,
blocked,
}))
} else {
Ok(None)
}
}
pub async fn match_websocket_operation(
context: LemmyContext,
id: ConnectionId,
op: UserOperation,
data: &str,
) -> Result<String, LemmyError> {
match op {
// User ops
UserOperation::Login => do_websocket_operation::<Login>(context, id, op, data).await,
UserOperation::Register => do_websocket_operation::<Register>(context, id, op, data).await,
UserOperation::GetCaptcha => do_websocket_operation::<GetCaptcha>(context, id, op, data).await,
UserOperation::GetUserDetails => {
do_websocket_operation::<GetUserDetails>(context, id, op, data).await
}
UserOperation::GetReplies => do_websocket_operation::<GetReplies>(context, id, op, data).await,
UserOperation::AddAdmin => do_websocket_operation::<AddAdmin>(context, id, op, data).await,
UserOperation::BanUser => do_websocket_operation::<BanUser>(context, id, op, data).await,
UserOperation::GetUserMentions => {
do_websocket_operation::<GetUserMentions>(context, id, op, data).await
}
UserOperation::MarkUserMentionAsRead => {
do_websocket_operation::<MarkUserMentionAsRead>(context, id, op, data).await
}
UserOperation::MarkAllAsRead => {
do_websocket_operation::<MarkAllAsRead>(context, id, op, data).await
}
UserOperation::DeleteAccount => {
do_websocket_operation::<DeleteAccount>(context, id, op, data).await
}
UserOperation::PasswordReset => {
do_websocket_operation::<PasswordReset>(context, id, op, data).await
}
UserOperation::PasswordChange => {
do_websocket_operation::<PasswordChange>(context, id, op, data).await
}
UserOperation::UserJoin => do_websocket_operation::<UserJoin>(context, id, op, data).await,
UserOperation::PostJoin => do_websocket_operation::<PostJoin>(context, id, op, data).await,
UserOperation::CommunityJoin => {
do_websocket_operation::<CommunityJoin>(context, id, op, data).await
}
UserOperation::ModJoin => do_websocket_operation::<ModJoin>(context, id, op, data).await,
UserOperation::SaveUserSettings => {
do_websocket_operation::<SaveUserSettings>(context, id, op, data).await
}
UserOperation::GetReportCount => {
do_websocket_operation::<GetReportCount>(context, id, op, data).await
}
// Private Message ops
UserOperation::CreatePrivateMessage => {
do_websocket_operation::<CreatePrivateMessage>(context, id, op, data).await
}
UserOperation::EditPrivateMessage => {
do_websocket_operation::<EditPrivateMessage>(context, id, op, data).await
}
UserOperation::DeletePrivateMessage => {
do_websocket_operation::<DeletePrivateMessage>(context, id, op, data).await
}
UserOperation::MarkPrivateMessageAsRead => {
do_websocket_operation::<MarkPrivateMessageAsRead>(context, id, op, data).await
}
UserOperation::GetPrivateMessages => {
do_websocket_operation::<GetPrivateMessages>(context, id, op, data).await
}
// Site ops
UserOperation::GetModlog => do_websocket_operation::<GetModlog>(context, id, op, data).await,
UserOperation::CreateSite => do_websocket_operation::<CreateSite>(context, id, op, data).await,
UserOperation::EditSite => do_websocket_operation::<EditSite>(context, id, op, data).await,
UserOperation::GetSite => do_websocket_operation::<GetSite>(context, id, op, data).await,
UserOperation::GetSiteConfig => {
do_websocket_operation::<GetSiteConfig>(context, id, op, data).await
}
UserOperation::SaveSiteConfig => {
do_websocket_operation::<SaveSiteConfig>(context, id, op, data).await
}
UserOperation::Search => do_websocket_operation::<Search>(context, id, op, data).await,
UserOperation::TransferCommunity => {
do_websocket_operation::<TransferCommunity>(context, id, op, data).await
}
UserOperation::TransferSite => {
do_websocket_operation::<TransferSite>(context, id, op, data).await
}
// Community ops
UserOperation::GetCommunity => {
do_websocket_operation::<GetCommunity>(context, id, op, data).await
}
UserOperation::ListCommunities => {
do_websocket_operation::<ListCommunities>(context, id, op, data).await
}
UserOperation::CreateCommunity => {
do_websocket_operation::<CreateCommunity>(context, id, op, data).await
}
UserOperation::EditCommunity => {
do_websocket_operation::<EditCommunity>(context, id, op, data).await
}
UserOperation::DeleteCommunity => {
do_websocket_operation::<DeleteCommunity>(context, id, op, data).await
}
UserOperation::RemoveCommunity => {
do_websocket_operation::<RemoveCommunity>(context, id, op, data).await
}
UserOperation::FollowCommunity => {
do_websocket_operation::<FollowCommunity>(context, id, op, data).await
}
UserOperation::GetFollowedCommunities => {
do_websocket_operation::<GetFollowedCommunities>(context, id, op, data).await
}
UserOperation::BanFromCommunity => {
do_websocket_operation::<BanFromCommunity>(context, id, op, data).await
}
UserOperation::AddModToCommunity => {
do_websocket_operation::<AddModToCommunity>(context, id, op, data).await
}
// Post ops
UserOperation::CreatePost => do_websocket_operation::<CreatePost>(context, id, op, data).await,
UserOperation::GetPost => do_websocket_operation::<GetPost>(context, id, op, data).await,
UserOperation::GetPosts => do_websocket_operation::<GetPosts>(context, id, op, data).await,
UserOperation::EditPost => do_websocket_operation::<EditPost>(context, id, op, data).await,
UserOperation::DeletePost => do_websocket_operation::<DeletePost>(context, id, op, data).await,
UserOperation::RemovePost => do_websocket_operation::<RemovePost>(context, id, op, data).await,
UserOperation::LockPost => do_websocket_operation::<LockPost>(context, id, op, data).await,
UserOperation::StickyPost => do_websocket_operation::<StickyPost>(context, id, op, data).await,
UserOperation::CreatePostLike => {
do_websocket_operation::<CreatePostLike>(context, id, op, data).await
}
UserOperation::SavePost => do_websocket_operation::<SavePost>(context, id, op, data).await,
UserOperation::CreatePostReport => {
do_websocket_operation::<CreatePostReport>(context, id, op, data).await
}
UserOperation::ListPostReports => {
do_websocket_operation::<ListPostReports>(context, id, op, data).await
}
UserOperation::ResolvePostReport => {
do_websocket_operation::<ResolvePostReport>(context, id, op, data).await
}
// Comment ops
UserOperation::CreateComment => {
do_websocket_operation::<CreateComment>(context, id, op, data).await
}
UserOperation::EditComment => {
do_websocket_operation::<EditComment>(context, id, op, data).await
}
UserOperation::DeleteComment => {
do_websocket_operation::<DeleteComment>(context, id, op, data).await
}
UserOperation::RemoveComment => {
do_websocket_operation::<RemoveComment>(context, id, op, data).await
}
UserOperation::MarkCommentAsRead => {
do_websocket_operation::<MarkCommentAsRead>(context, id, op, data).await
}
UserOperation::SaveComment => {
do_websocket_operation::<SaveComment>(context, id, op, data).await
}
UserOperation::GetComments => {
do_websocket_operation::<GetComments>(context, id, op, data).await
}
UserOperation::CreateCommentLike => {
do_websocket_operation::<CreateCommentLike>(context, id, op, data).await
}
UserOperation::CreateCommentReport => {
do_websocket_operation::<CreateCommentReport>(context, id, op, data).await
}
UserOperation::ListCommentReports => {
do_websocket_operation::<ListCommentReports>(context, id, op, data).await
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}
UserOperation::ResolveCommentReport => {
do_websocket_operation::<ResolveCommentReport>(context, id, op, data).await
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}
}
}
async fn do_websocket_operation<'a, 'b, Data>(
context: LemmyContext,
id: ConnectionId,
op: UserOperation,
data: &str,
) -> Result<String, LemmyError>
where
for<'de> Data: Deserialize<'de> + 'a,
Data: Perform,
{
let parsed_data: Data = serde_json::from_str(&data)?;
let res = parsed_data
.perform(&web::Data::new(context), Some(id))
.await?;
serialize_websocket_message(&op, &res)
}
pub(crate) fn captcha_espeak_wav_base64(captcha: &str) -> Result<String, LemmyError> {
let mut built_text = String::new();
// Building proper speech text for espeak
for mut c in captcha.chars() {
let new_str = if c.is_alphabetic() {
if c.is_lowercase() {
c.make_ascii_uppercase();
format!("lower case {} ... ", c)
} else {
c.make_ascii_uppercase();
format!("capital {} ... ", c)
}
} else {
format!("{} ...", c)
};
built_text.push_str(&new_str);
}
espeak_wav_base64(&built_text)
}
pub(crate) fn espeak_wav_base64(text: &str) -> Result<String, LemmyError> {
// Make a temp file path
let uuid = uuid::Uuid::new_v4().to_string();
let file_path = format!("/tmp/lemmy_espeak_{}.wav", &uuid);
// Write the wav file
Command::new("espeak")
.arg("-w")
.arg(&file_path)
.arg(text)
.status()?;
// Read the wav file bytes
let bytes = std::fs::read(&file_path)?;
// Delete the file
std::fs::remove_file(file_path)?;
// Convert to base64
let base64 = base64::encode(bytes);
Ok(base64)
}
#[cfg(test)]
mod tests {
use crate::captcha_espeak_wav_base64;
#[test]
fn test_espeak() {
assert!(captcha_espeak_wav_base64("WxRt2l").is_ok())
}
}