lemmy/crates/api/src/post.rs

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use crate::{
check_community_ban,
check_downvotes_enabled,
check_optional_url,
collect_moderated_communities,
get_user_from_jwt,
get_user_from_jwt_opt,
is_mod_or_admin,
Perform,
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};
use actix_web::web::Data;
use lemmy_apub::{ApubLikeableType, ApubObjectType};
use lemmy_db_queries::{
source::post::Post_,
Crud,
Likeable,
ListingType,
Reportable,
Saveable,
SortType,
};
use lemmy_db_schema::{
naive_now,
source::{
moderator::*,
post::*,
post_report::{PostReport, PostReportForm},
},
};
use lemmy_db_views::{
comment_view::CommentQueryBuilder,
post_report_view::{PostReportQueryBuilder, PostReportView},
post_view::{PostQueryBuilder, PostView},
};
use lemmy_db_views_actor::{
community_moderator_view::CommunityModeratorView,
community_view::CommunityView,
};
use lemmy_structs::{blocking, post::*};
use lemmy_utils::{
apub::{make_apub_endpoint, EndpointType},
request::fetch_iframely_and_pictrs_data,
utils::{check_slurs, check_slurs_opt, is_valid_post_title},
APIError,
ConnectionId,
LemmyError,
};
use lemmy_websocket::{
messages::{GetPostUsersOnline, SendModRoomMessage, SendPost, SendUserRoomMessage},
LemmyContext,
UserOperation,
};
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use std::str::FromStr;
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#[async_trait::async_trait(?Send)]
impl Perform for CreatePost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &CreatePost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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check_slurs(&data.name)?;
check_slurs_opt(&data.body)?;
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if !is_valid_post_title(&data.name) {
return Err(APIError::err("invalid_post_title").into());
}
check_community_ban(user.id, data.community_id, context.pool()).await?;
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check_optional_url(&Some(data.url.to_owned()))?;
// Fetch Iframely and pictrs cached image
let (iframely_title, iframely_description, iframely_html, pictrs_thumbnail) =
fetch_iframely_and_pictrs_data(context.client(), data.url.to_owned()).await;
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let post_form = PostForm {
name: data.name.trim().to_owned(),
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url: data.url.to_owned(),
body: data.body.to_owned(),
community_id: data.community_id,
creator_id: user.id,
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removed: None,
deleted: None,
nsfw: data.nsfw,
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locked: None,
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stickied: None,
updated: None,
embed_title: iframely_title,
embed_description: iframely_description,
embed_html: iframely_html,
thumbnail_url: pictrs_thumbnail,
ap_id: None,
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local: true,
published: None,
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};
let inserted_post =
match blocking(context.pool(), move |conn| Post::create(conn, &post_form)).await? {
Ok(post) => post,
Err(e) => {
let err_type = if e.to_string() == "value too long for type character varying(200)" {
"post_title_too_long"
} else {
"couldnt_create_post"
};
return Err(APIError::err(err_type).into());
}
};
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let inserted_post_id = inserted_post.id;
let updated_post = match blocking(context.pool(), move |conn| {
let apub_id =
make_apub_endpoint(EndpointType::Post, &inserted_post_id.to_string()).to_string();
Post::update_ap_id(conn, inserted_post_id, apub_id)
})
.await?
{
Ok(post) => post,
Err(_e) => return Err(APIError::err("couldnt_create_post").into()),
};
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updated_post.send_create(&user, context).await?;
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// They like their own post by default
let like_form = PostLikeForm {
post_id: inserted_post.id,
user_id: user.id,
score: 1,
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};
let like = move |conn: &'_ _| PostLike::like(conn, &like_form);
if blocking(context.pool(), like).await?.is_err() {
return Err(APIError::err("couldnt_like_post").into());
}
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updated_post.send_like(&user, context).await?;
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// Refetch the view
let inserted_post_id = inserted_post.id;
let post_view = match blocking(context.pool(), move |conn| {
PostView::read(conn, inserted_post_id, Some(user.id))
})
.await?
{
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Ok(post) => post,
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Err(_e) => return Err(APIError::err("couldnt_find_post").into()),
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};
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::CreatePost,
post: res.clone(),
websocket_id,
});
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for GetPost {
type Response = GetPostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetPostResponse, LemmyError> {
let data: &GetPost = &self;
let user = get_user_from_jwt_opt(&data.auth, context.pool()).await?;
let user_id = user.map(|u| u.id);
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let id = data.id;
let post_view = match blocking(context.pool(), move |conn| {
PostView::read(conn, id, user_id)
})
.await?
{
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Ok(post) => post,
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Err(_e) => return Err(APIError::err("couldnt_find_post").into()),
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};
let id = data.id;
let comments = blocking(context.pool(), move |conn| {
CommentQueryBuilder::create(conn)
.my_user_id(user_id)
.post_id(id)
.limit(9999)
.list()
})
.await??;
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let community_id = post_view.community.id;
let moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(conn, community_id)
})
.await??;
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// Necessary for the sidebar
let community_view = match blocking(context.pool(), move |conn| {
CommunityView::read(conn, community_id, user_id)
})
.await?
{
Ok(community) => community,
Err(_e) => return Err(APIError::err("couldnt_find_community").into()),
};
let online = context
.chat_server()
.send(GetPostUsersOnline { post_id: data.id })
.await
.unwrap_or(1);
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// Return the jwt
Ok(GetPostResponse {
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post_view,
community_view,
comments,
moderators,
online,
})
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for GetPosts {
type Response = GetPostsResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<GetPostsResponse, LemmyError> {
let data: &GetPosts = &self;
let user = get_user_from_jwt_opt(&data.auth, context.pool()).await?;
let user_id = match &user {
Some(user) => Some(user.id),
None => None,
};
let show_nsfw = match &user {
Some(user) => user.show_nsfw,
None => false,
};
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let type_ = ListingType::from_str(&data.type_)?;
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let sort = SortType::from_str(&data.sort)?;
let page = data.page;
let limit = data.limit;
let community_id = data.community_id;
let community_name = data.community_name.to_owned();
let posts = match blocking(context.pool(), move |conn| {
PostQueryBuilder::create(conn)
.listing_type(&type_)
.sort(&sort)
.show_nsfw(show_nsfw)
.community_id(community_id)
.community_name(community_name)
.my_user_id(user_id)
.page(page)
.limit(limit)
.list()
})
.await?
{
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Ok(posts) => posts,
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Err(_e) => return Err(APIError::err("couldnt_get_posts").into()),
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};
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Ok(GetPostsResponse { posts })
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for CreatePostLike {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &CreatePostLike = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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// Don't do a downvote if site has downvotes disabled
check_downvotes_enabled(data.score, context.pool()).await?;
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// Check for a community ban
let post_id = data.post_id;
let post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, post.community_id, context.pool()).await?;
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let like_form = PostLikeForm {
post_id: data.post_id,
user_id: user.id,
score: data.score,
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};
// Remove any likes first
let user_id = user.id;
blocking(context.pool(), move |conn| {
PostLike::remove(conn, user_id, post_id)
})
.await??;
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// Only add the like if the score isnt 0
let do_add = like_form.score != 0 && (like_form.score == 1 || like_form.score == -1);
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if do_add {
let like_form2 = like_form.clone();
let like = move |conn: &'_ _| PostLike::like(conn, &like_form2);
if blocking(context.pool(), like).await?.is_err() {
return Err(APIError::err("couldnt_like_post").into());
}
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if like_form.score == 1 {
post.send_like(&user, context).await?;
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} else if like_form.score == -1 {
post.send_dislike(&user, context).await?;
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}
} else {
post.send_undo_like(&user, context).await?;
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}
let post_id = data.post_id;
let user_id = user.id;
let post_view = match blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user_id))
})
.await?
{
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Ok(post) => post,
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Err(_e) => return Err(APIError::err("couldnt_find_post").into()),
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};
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::CreatePostLike,
post: res.clone(),
websocket_id,
});
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for EditPost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &EditPost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
check_slurs(&data.name)?;
check_slurs_opt(&data.body)?;
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if !is_valid_post_title(&data.name) {
return Err(APIError::err("invalid_post_title").into());
}
let post_id = data.post_id;
let orig_post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
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check_community_ban(user.id, orig_post.community_id, context.pool()).await?;
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// Verify that only the creator can edit
if !Post::is_post_creator(user.id, orig_post.creator_id) {
return Err(APIError::err("no_post_edit_allowed").into());
}
// Fetch Iframely and Pictrs cached image
let (iframely_title, iframely_description, iframely_html, pictrs_thumbnail) =
fetch_iframely_and_pictrs_data(context.client(), data.url.to_owned()).await;
let post_form = PostForm {
name: data.name.trim().to_owned(),
url: data.url.to_owned(),
body: data.body.to_owned(),
nsfw: data.nsfw,
creator_id: orig_post.creator_id.to_owned(),
community_id: orig_post.community_id,
removed: Some(orig_post.removed),
deleted: Some(orig_post.deleted),
locked: Some(orig_post.locked),
stickied: Some(orig_post.stickied),
updated: Some(naive_now()),
embed_title: iframely_title,
embed_description: iframely_description,
embed_html: iframely_html,
thumbnail_url: pictrs_thumbnail,
ap_id: Some(orig_post.ap_id),
local: orig_post.local,
published: None,
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};
let post_id = data.post_id;
let res = blocking(context.pool(), move |conn| {
Post::update(conn, post_id, &post_form)
})
.await?;
let updated_post: Post = match res {
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Ok(post) => post,
Err(e) => {
let err_type = if e.to_string() == "value too long for type character varying(200)" {
"post_title_too_long"
} else {
"couldnt_update_post"
};
return Err(APIError::err(err_type).into());
}
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};
// Send apub update
updated_post.send_update(&user, context).await?;
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let post_id = data.post_id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user.id))
})
.await??;
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::EditPost,
post: res.clone(),
websocket_id,
});
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Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for DeletePost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &DeletePost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let post_id = data.post_id;
let orig_post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, orig_post.community_id, context.pool()).await?;
// Verify that only the creator can delete
if !Post::is_post_creator(user.id, orig_post.creator_id) {
return Err(APIError::err("no_post_edit_allowed").into());
}
// Update the post
let post_id = data.post_id;
let deleted = data.deleted;
let updated_post = blocking(context.pool(), move |conn| {
Post::update_deleted(conn, post_id, deleted)
})
.await??;
// apub updates
if deleted {
updated_post.send_delete(&user, context).await?;
} else {
updated_post.send_undo_delete(&user, context).await?;
}
// Refetch the post
let post_id = data.post_id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user.id))
})
.await??;
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::DeletePost,
post: res.clone(),
websocket_id,
});
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for RemovePost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &RemovePost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let post_id = data.post_id;
let orig_post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, orig_post.community_id, context.pool()).await?;
// Verify that only the mods can remove
is_mod_or_admin(context.pool(), user.id, orig_post.community_id).await?;
// Update the post
let post_id = data.post_id;
let removed = data.removed;
let updated_post = blocking(context.pool(), move |conn| {
Post::update_removed(conn, post_id, removed)
})
.await??;
// Mod tables
let form = ModRemovePostForm {
mod_user_id: user.id,
post_id: data.post_id,
removed: Some(removed),
reason: data.reason.to_owned(),
};
blocking(context.pool(), move |conn| {
ModRemovePost::create(conn, &form)
})
.await??;
// apub updates
if removed {
updated_post.send_remove(&user, context).await?;
} else {
updated_post.send_undo_remove(&user, context).await?;
}
// Refetch the post
let post_id = data.post_id;
let user_id = user.id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user_id))
})
.await??;
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::RemovePost,
post: res.clone(),
websocket_id,
});
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for LockPost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &LockPost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let post_id = data.post_id;
let orig_post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, orig_post.community_id, context.pool()).await?;
// Verify that only the mods can lock
is_mod_or_admin(context.pool(), user.id, orig_post.community_id).await?;
// Update the post
let post_id = data.post_id;
let locked = data.locked;
let updated_post = blocking(context.pool(), move |conn| {
Post::update_locked(conn, post_id, locked)
})
.await??;
// Mod tables
let form = ModLockPostForm {
mod_user_id: user.id,
post_id: data.post_id,
locked: Some(locked),
};
blocking(context.pool(), move |conn| ModLockPost::create(conn, &form)).await??;
// apub updates
updated_post.send_update(&user, context).await?;
// Refetch the post
let post_id = data.post_id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user.id))
})
.await??;
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::LockPost,
post: res.clone(),
websocket_id,
});
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for StickyPost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &StickyPost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let post_id = data.post_id;
let orig_post = blocking(context.pool(), move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, orig_post.community_id, context.pool()).await?;
// Verify that only the mods can sticky
is_mod_or_admin(context.pool(), user.id, orig_post.community_id).await?;
// Update the post
let post_id = data.post_id;
let stickied = data.stickied;
let updated_post = blocking(context.pool(), move |conn| {
Post::update_stickied(conn, post_id, stickied)
})
.await??;
// Mod tables
let form = ModStickyPostForm {
mod_user_id: user.id,
post_id: data.post_id,
stickied: Some(stickied),
};
blocking(context.pool(), move |conn| {
ModStickyPost::create(conn, &form)
})
.await??;
// Apub updates
// TODO stickied should pry work like locked for ease of use
updated_post.send_update(&user, context).await?;
// Refetch the post
let post_id = data.post_id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user.id))
})
.await??;
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let res = PostResponse { post_view };
context.chat_server().do_send(SendPost {
op: UserOperation::StickyPost,
post: res.clone(),
websocket_id,
});
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for SavePost {
type Response = PostResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
_websocket_id: Option<ConnectionId>,
) -> Result<PostResponse, LemmyError> {
let data: &SavePost = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
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let post_saved_form = PostSavedForm {
post_id: data.post_id,
user_id: user.id,
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};
if data.save {
let save = move |conn: &'_ _| PostSaved::save(conn, &post_saved_form);
if blocking(context.pool(), save).await?.is_err() {
return Err(APIError::err("couldnt_save_post").into());
}
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} else {
let unsave = move |conn: &'_ _| PostSaved::unsave(conn, &post_saved_form);
if blocking(context.pool(), unsave).await?.is_err() {
return Err(APIError::err("couldnt_save_post").into());
}
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}
let post_id = data.post_id;
let user_id = user.id;
let post_view = blocking(context.pool(), move |conn| {
PostView::read(conn, post_id, Some(user_id))
})
.await??;
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Ok(PostResponse { post_view })
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}
}
/// Creates a post report and notifies the moderators of the community
#[async_trait::async_trait(?Send)]
impl Perform for CreatePostReport {
type Response = CreatePostReportResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
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websocket_id: Option<ConnectionId>,
) -> Result<CreatePostReportResponse, LemmyError> {
let data: &CreatePostReport = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
// check size of report and check for whitespace
let reason = data.reason.trim();
if reason.is_empty() {
return Err(APIError::err("report_reason_required").into());
}
if reason.len() > 1000 {
return Err(APIError::err("report_too_long").into());
}
let user_id = user.id;
let post_id = data.post_id;
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let post_view = blocking(context.pool(), move |conn| {
PostView::read(&conn, post_id, None)
})
.await??;
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check_community_ban(user_id, post_view.community.id, context.pool()).await?;
let report_form = PostReportForm {
creator_id: user_id,
post_id,
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original_post_name: post_view.post.name,
original_post_url: post_view.post.url,
original_post_body: post_view.post.body,
reason: data.reason.to_owned(),
};
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let report = match blocking(context.pool(), move |conn| {
PostReport::report(conn, &report_form)
})
.await?
{
Ok(report) => report,
Err(_e) => return Err(APIError::err("couldnt_create_report").into()),
};
let res = CreatePostReportResponse { success: true };
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context.chat_server().do_send(SendUserRoomMessage {
op: UserOperation::CreatePostReport,
response: res.clone(),
recipient_id: user.id,
websocket_id,
});
context.chat_server().do_send(SendModRoomMessage {
op: UserOperation::CreatePostReport,
response: report,
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community_id: post_view.community.id,
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websocket_id,
});
Ok(res)
}
}
/// Resolves or unresolves a post report and notifies the moderators of the community
#[async_trait::async_trait(?Send)]
impl Perform for ResolvePostReport {
type Response = ResolvePostReportResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
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websocket_id: Option<ConnectionId>,
) -> Result<ResolvePostReportResponse, LemmyError> {
let data: &ResolvePostReport = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let report_id = data.report_id;
let report = blocking(context.pool(), move |conn| {
PostReportView::read(&conn, report_id)
})
.await??;
let user_id = user.id;
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is_mod_or_admin(context.pool(), user_id, report.community.id).await?;
let resolved = data.resolved;
let resolve_fun = move |conn: &'_ _| {
if resolved {
PostReport::resolve(conn, report_id, user_id)
} else {
PostReport::unresolve(conn, report_id, user_id)
}
};
let res = ResolvePostReportResponse {
report_id,
resolved: true,
};
if blocking(context.pool(), resolve_fun).await?.is_err() {
return Err(APIError::err("couldnt_resolve_report").into());
};
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context.chat_server().do_send(SendModRoomMessage {
op: UserOperation::ResolvePostReport,
response: res.clone(),
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community_id: report.community.id,
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websocket_id,
});
Ok(res)
}
}
/// Lists post reports for a community if an id is supplied
/// or returns all post reports for communities a user moderates
#[async_trait::async_trait(?Send)]
impl Perform for ListPostReports {
type Response = ListPostReportsResponse;
async fn perform(
&self,
context: &Data<LemmyContext>,
websocket_id: Option<ConnectionId>,
) -> Result<ListPostReportsResponse, LemmyError> {
let data: &ListPostReports = &self;
let user = get_user_from_jwt(&data.auth, context.pool()).await?;
let user_id = user.id;
let community_id = data.community;
let community_ids =
collect_moderated_communities(user_id, community_id, context.pool()).await?;
let page = data.page;
let limit = data.limit;
let posts = blocking(context.pool(), move |conn| {
PostReportQueryBuilder::create(conn)
.community_ids(community_ids)
.page(page)
.limit(limit)
.list()
})
.await??;
let res = ListPostReportsResponse { posts };
context.chat_server().do_send(SendUserRoomMessage {
op: UserOperation::ListPostReports,
response: res.clone(),
recipient_id: user.id,
websocket_id,
});
Ok(res)
}
}