lemmy/server/src/api/comment.rs

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use crate::{
api::{
check_community_ban,
get_user_from_jwt,
get_user_from_jwt_opt,
is_mod_or_admin,
APIError,
Perform,
},
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apub::{ApubLikeableType, ApubObjectType},
blocking,
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websocket::{
server::{JoinCommunityRoom, SendComment},
UserOperation,
WebsocketInfo,
},
DbPool,
LemmyError,
};
use actix_web::client::Client;
use lemmy_db::{
comment::*,
comment_view::*,
moderator::*,
post::*,
site_view::*,
user::*,
user_mention::*,
Crud,
Likeable,
ListingType,
Saveable,
SortType,
};
use lemmy_utils::{
make_apub_endpoint,
remove_slurs,
scrape_text_for_mentions,
send_email,
settings::Settings,
EndpointType,
MentionData,
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};
use log::error;
use serde::{Deserialize, Serialize};
use std::str::FromStr;
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#[derive(Serialize, Deserialize)]
pub struct CreateComment {
content: String,
parent_id: Option<i32>,
pub post_id: i32,
form_id: Option<String>,
auth: String,
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}
#[derive(Serialize, Deserialize)]
pub struct EditComment {
content: String,
edit_id: i32,
form_id: Option<String>,
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auth: String,
}
#[derive(Serialize, Deserialize)]
pub struct DeleteComment {
edit_id: i32,
deleted: bool,
auth: String,
}
#[derive(Serialize, Deserialize)]
pub struct RemoveComment {
edit_id: i32,
removed: bool,
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reason: Option<String>,
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auth: String,
}
#[derive(Serialize, Deserialize)]
pub struct MarkCommentAsRead {
edit_id: i32,
read: bool,
auth: String,
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}
#[derive(Serialize, Deserialize)]
pub struct SaveComment {
comment_id: i32,
save: bool,
auth: String,
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}
#[derive(Serialize, Deserialize, Clone)]
pub struct CommentResponse {
pub comment: CommentView,
pub recipient_ids: Vec<i32>,
pub form_id: Option<String>,
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}
#[derive(Serialize, Deserialize)]
pub struct CreateCommentLike {
comment_id: i32,
score: i16,
auth: String,
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}
#[derive(Serialize, Deserialize)]
pub struct GetComments {
type_: String,
sort: String,
page: Option<i64>,
limit: Option<i64>,
pub community_id: Option<i32>,
auth: Option<String>,
}
#[derive(Serialize, Deserialize)]
pub struct GetCommentsResponse {
comments: Vec<CommentView>,
}
#[async_trait::async_trait(?Send)]
impl Perform for CreateComment {
type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
client: Client,
) -> Result<CommentResponse, LemmyError> {
let data: &CreateComment = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let content_slurs_removed = remove_slurs(&data.content.to_owned());
let comment_form = CommentForm {
content: content_slurs_removed,
parent_id: data.parent_id.to_owned(),
post_id: data.post_id,
creator_id: user.id,
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removed: None,
deleted: None,
read: None,
published: None,
updated: None,
ap_id: "http://fake.com".into(),
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local: true,
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};
// Check for a community ban
let post_id = data.post_id;
let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, post.community_id, pool).await?;
// Check if post is locked, no new comments
if post.locked {
return Err(APIError::err("locked").into());
}
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// Create the comment
let comment_form2 = comment_form.clone();
let inserted_comment =
match blocking(pool, move |conn| Comment::create(&conn, &comment_form2)).await? {
Ok(comment) => comment,
Err(_e) => return Err(APIError::err("couldnt_create_comment").into()),
};
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// Necessary to update the ap_id
let inserted_comment_id = inserted_comment.id;
let updated_comment: Comment = match blocking(pool, move |conn| {
let apub_id =
make_apub_endpoint(EndpointType::Comment, &inserted_comment_id.to_string()).to_string();
Comment::update_ap_id(&conn, inserted_comment_id, apub_id)
})
.await?
{
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Ok(comment) => comment,
Err(_e) => return Err(APIError::err("couldnt_create_comment").into()),
};
updated_comment.send_create(&user, &client, pool).await?;
// Scan the comment for user mentions, add those rows
let mentions = scrape_text_for_mentions(&comment_form.content);
let recipient_ids =
send_local_notifs(mentions, updated_comment.clone(), &user, post, pool, true).await?;
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// You like your own comment by default
let like_form = CommentLikeForm {
comment_id: inserted_comment.id,
post_id: data.post_id,
user_id: user.id,
score: 1,
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};
let like = move |conn: &'_ _| CommentLike::like(&conn, &like_form);
if blocking(pool, like).await?.is_err() {
return Err(APIError::err("couldnt_like_comment").into());
}
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updated_comment.send_like(&user, &client, pool).await?;
let user_id = user.id;
let comment_view = blocking(pool, move |conn| {
CommentView::read(&conn, inserted_comment.id, Some(user_id))
})
.await??;
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let mut res = CommentResponse {
comment: comment_view,
recipient_ids,
form_id: data.form_id.to_owned(),
};
if let Some(ws) = websocket_info {
ws.chatserver.do_send(SendComment {
op: UserOperation::CreateComment,
comment: res.clone(),
my_id: ws.id,
});
// strip out the recipient_ids, so that
// users don't get double notifs
res.recipient_ids = Vec::new();
}
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for EditComment {
type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
client: Client,
) -> Result<CommentResponse, LemmyError> {
let data: &EditComment = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let edit_id = data.edit_id;
let orig_comment =
blocking(pool, move |conn| CommentView::read(&conn, edit_id, None)).await??;
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check_community_ban(user.id, orig_comment.community_id, pool).await?;
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// Verify that only the creator can edit
if user.id != orig_comment.creator_id {
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return Err(APIError::err("no_comment_edit_allowed").into());
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}
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// Do the update
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let content_slurs_removed = remove_slurs(&data.content.to_owned());
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let edit_id = data.edit_id;
let updated_comment = match blocking(pool, move |conn| {
Comment::update_content(conn, edit_id, &content_slurs_removed)
})
.await?
{
Ok(comment) => comment,
Err(_e) => return Err(APIError::err("couldnt_update_comment").into()),
};
// Send the apub update
updated_comment.send_update(&user, &client, pool).await?;
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// Do the mentions / recipients
let post_id = orig_comment.post_id;
let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
let updated_comment_content = updated_comment.content.to_owned();
let mentions = scrape_text_for_mentions(&updated_comment_content);
let recipient_ids =
send_local_notifs(mentions, updated_comment, &user, post, pool, false).await?;
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let edit_id = data.edit_id;
let user_id = user.id;
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let comment_view = blocking(pool, move |conn| {
CommentView::read(conn, edit_id, Some(user_id))
})
.await??;
let mut res = CommentResponse {
comment: comment_view,
recipient_ids,
form_id: data.form_id.to_owned(),
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};
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if let Some(ws) = websocket_info {
ws.chatserver.do_send(SendComment {
op: UserOperation::EditComment,
comment: res.clone(),
my_id: ws.id,
});
// strip out the recipient_ids, so that
// users don't get double notifs
res.recipient_ids = Vec::new();
}
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for DeleteComment {
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type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
client: Client,
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) -> Result<CommentResponse, LemmyError> {
let data: &DeleteComment = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let edit_id = data.edit_id;
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let orig_comment =
blocking(pool, move |conn| CommentView::read(&conn, edit_id, None)).await??;
check_community_ban(user.id, orig_comment.community_id, pool).await?;
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// Verify that only the creator can delete
if user.id != orig_comment.creator_id {
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return Err(APIError::err("no_comment_edit_allowed").into());
}
// Do the delete
let deleted = data.deleted;
let updated_comment = match blocking(pool, move |conn| {
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Comment::update_deleted(conn, edit_id, deleted)
})
.await?
{
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Ok(comment) => comment,
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Err(_e) => return Err(APIError::err("couldnt_update_comment").into()),
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};
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// Send the apub message
if deleted {
updated_comment.send_delete(&user, &client, pool).await?;
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} else {
updated_comment
.send_undo_delete(&user, &client, pool)
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.await?;
}
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// Refetch it
let edit_id = data.edit_id;
let user_id = user.id;
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let comment_view = blocking(pool, move |conn| {
CommentView::read(conn, edit_id, Some(user_id))
})
.await??;
// Build the recipients
let post_id = comment_view.post_id;
let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
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let mentions = vec![];
let recipient_ids =
send_local_notifs(mentions, updated_comment, &user, post, pool, false).await?;
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let mut res = CommentResponse {
comment: comment_view,
recipient_ids,
form_id: None,
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};
if let Some(ws) = websocket_info {
ws.chatserver.do_send(SendComment {
op: UserOperation::DeleteComment,
comment: res.clone(),
my_id: ws.id,
});
// strip out the recipient_ids, so that
// users don't get double notifs
res.recipient_ids = Vec::new();
}
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for RemoveComment {
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type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
client: Client,
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) -> Result<CommentResponse, LemmyError> {
let data: &RemoveComment = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let edit_id = data.edit_id;
let orig_comment =
blocking(pool, move |conn| CommentView::read(&conn, edit_id, None)).await??;
check_community_ban(user.id, orig_comment.community_id, pool).await?;
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// Verify that only a mod or admin can remove
is_mod_or_admin(pool, user.id, orig_comment.community_id).await?;
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// Do the remove
let removed = data.removed;
let updated_comment = match blocking(pool, move |conn| {
Comment::update_removed(conn, edit_id, removed)
})
.await?
{
Ok(comment) => comment,
Err(_e) => return Err(APIError::err("couldnt_update_comment").into()),
};
// Mod tables
let form = ModRemoveCommentForm {
mod_user_id: user.id,
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comment_id: data.edit_id,
removed: Some(removed),
reason: data.reason.to_owned(),
};
blocking(pool, move |conn| ModRemoveComment::create(conn, &form)).await??;
// Send the apub message
if removed {
updated_comment.send_remove(&user, &client, pool).await?;
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} else {
updated_comment
.send_undo_remove(&user, &client, pool)
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.await?;
}
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// Refetch it
let edit_id = data.edit_id;
let user_id = user.id;
let comment_view = blocking(pool, move |conn| {
CommentView::read(conn, edit_id, Some(user_id))
})
.await??;
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// Build the recipients
let post_id = comment_view.post_id;
let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
let mentions = vec![];
let recipient_ids =
send_local_notifs(mentions, updated_comment, &user, post, pool, false).await?;
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let mut res = CommentResponse {
comment: comment_view,
recipient_ids,
form_id: None,
};
if let Some(ws) = websocket_info {
ws.chatserver.do_send(SendComment {
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op: UserOperation::RemoveComment,
comment: res.clone(),
my_id: ws.id,
});
// strip out the recipient_ids, so that
// users don't get double notifs
res.recipient_ids = Vec::new();
}
Ok(res)
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}
}
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#[async_trait::async_trait(?Send)]
impl Perform for MarkCommentAsRead {
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type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
_websocket_info: Option<WebsocketInfo>,
_client: Client,
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) -> Result<CommentResponse, LemmyError> {
let data: &MarkCommentAsRead = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let edit_id = data.edit_id;
let orig_comment =
blocking(pool, move |conn| CommentView::read(&conn, edit_id, None)).await??;
check_community_ban(user.id, orig_comment.community_id, pool).await?;
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// Verify that only the recipient can mark as read
// Needs to fetch the parent comment / post to get the recipient
let parent_id = orig_comment.parent_id;
match parent_id {
Some(pid) => {
let parent_comment =
blocking(pool, move |conn| CommentView::read(&conn, pid, None)).await??;
if user.id != parent_comment.creator_id {
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return Err(APIError::err("no_comment_edit_allowed").into());
}
}
None => {
let parent_post_id = orig_comment.post_id;
let parent_post = blocking(pool, move |conn| Post::read(conn, parent_post_id)).await??;
if user.id != parent_post.creator_id {
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return Err(APIError::err("no_comment_edit_allowed").into());
}
}
}
// Do the mark as read
let read = data.read;
match blocking(pool, move |conn| Comment::update_read(conn, edit_id, read)).await? {
Ok(comment) => comment,
Err(_e) => return Err(APIError::err("couldnt_update_comment").into()),
};
// Refetch it
let edit_id = data.edit_id;
let user_id = user.id;
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let comment_view = blocking(pool, move |conn| {
CommentView::read(conn, edit_id, Some(user_id))
})
.await??;
let res = CommentResponse {
comment: comment_view,
recipient_ids: Vec::new(),
form_id: None,
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};
Ok(res)
}
}
#[async_trait::async_trait(?Send)]
impl Perform for SaveComment {
type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
_websocket_info: Option<WebsocketInfo>,
_client: Client,
) -> Result<CommentResponse, LemmyError> {
let data: &SaveComment = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let comment_saved_form = CommentSavedForm {
comment_id: data.comment_id,
user_id: user.id,
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};
if data.save {
let save_comment = move |conn: &'_ _| CommentSaved::save(conn, &comment_saved_form);
if blocking(pool, save_comment).await?.is_err() {
return Err(APIError::err("couldnt_save_comment").into());
}
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} else {
let unsave_comment = move |conn: &'_ _| CommentSaved::unsave(conn, &comment_saved_form);
if blocking(pool, unsave_comment).await?.is_err() {
return Err(APIError::err("couldnt_save_comment").into());
}
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}
let comment_id = data.comment_id;
let user_id = user.id;
let comment_view = blocking(pool, move |conn| {
CommentView::read(conn, comment_id, Some(user_id))
})
.await??;
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Ok(CommentResponse {
comment: comment_view,
recipient_ids: Vec::new(),
form_id: None,
})
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for CreateCommentLike {
type Response = CommentResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
client: Client,
) -> Result<CommentResponse, LemmyError> {
let data: &CreateCommentLike = &self;
let user = get_user_from_jwt(&data.auth, pool).await?;
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let mut recipient_ids = Vec::new();
// Don't do a downvote if site has downvotes disabled
if data.score == -1 {
let site = blocking(pool, move |conn| SiteView::read(conn)).await??;
if !site.enable_downvotes {
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return Err(APIError::err("downvotes_disabled").into());
}
}
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let comment_id = data.comment_id;
let orig_comment =
blocking(pool, move |conn| CommentView::read(&conn, comment_id, None)).await??;
let post_id = orig_comment.post_id;
let post = blocking(pool, move |conn| Post::read(conn, post_id)).await??;
check_community_ban(user.id, post.community_id, pool).await?;
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let comment_id = data.comment_id;
let comment = blocking(pool, move |conn| Comment::read(conn, comment_id)).await??;
// Add to recipient ids
match comment.parent_id {
Some(parent_id) => {
let parent_comment = blocking(pool, move |conn| Comment::read(conn, parent_id)).await??;
if parent_comment.creator_id != user.id {
let parent_user = blocking(pool, move |conn| {
User_::read(conn, parent_comment.creator_id)
})
.await??;
recipient_ids.push(parent_user.id);
}
}
None => {
recipient_ids.push(post.creator_id);
}
}
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let like_form = CommentLikeForm {
comment_id: data.comment_id,
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post_id,
user_id: user.id,
score: data.score,
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};
// Remove any likes first
let like_form2 = like_form.clone();
blocking(pool, move |conn| CommentLike::remove(conn, &like_form2)).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: &'_ _| CommentLike::like(conn, &like_form2);
if blocking(pool, like).await?.is_err() {
return Err(APIError::err("couldnt_like_comment").into());
}
if like_form.score == 1 {
comment.send_like(&user, &client, pool).await?;
} else if like_form.score == -1 {
comment.send_dislike(&user, &client, pool).await?;
}
} else {
comment.send_undo_like(&user, &client, pool).await?;
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}
// Have to refetch the comment to get the current state
let comment_id = data.comment_id;
let user_id = user.id;
let liked_comment = blocking(pool, move |conn| {
CommentView::read(conn, comment_id, Some(user_id))
})
.await??;
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let mut res = CommentResponse {
comment: liked_comment,
recipient_ids,
form_id: None,
};
if let Some(ws) = websocket_info {
ws.chatserver.do_send(SendComment {
op: UserOperation::CreateCommentLike,
comment: res.clone(),
my_id: ws.id,
});
// strip out the recipient_ids, so that
// users don't get double notifs
res.recipient_ids = Vec::new();
}
Ok(res)
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}
}
#[async_trait::async_trait(?Send)]
impl Perform for GetComments {
type Response = GetCommentsResponse;
async fn perform(
&self,
pool: &DbPool,
websocket_info: Option<WebsocketInfo>,
_client: Client,
) -> Result<GetCommentsResponse, LemmyError> {
let data: &GetComments = &self;
let user = get_user_from_jwt_opt(&data.auth, pool).await?;
let user_id = user.map(|u| u.id);
let type_ = ListingType::from_str(&data.type_)?;
let sort = SortType::from_str(&data.sort)?;
let community_id = data.community_id;
let page = data.page;
let limit = data.limit;
let comments = blocking(pool, move |conn| {
CommentQueryBuilder::create(conn)
.listing_type(type_)
.sort(&sort)
.for_community_id(community_id)
.my_user_id(user_id)
.page(page)
.limit(limit)
.list()
})
.await?;
let comments = match comments {
Ok(comments) => comments,
Err(_) => return Err(APIError::err("couldnt_get_comments").into()),
};
if let Some(ws) = websocket_info {
// You don't need to join the specific community room, bc this is already handled by
// GetCommunity
if data.community_id.is_none() {
if let Some(id) = ws.id {
// 0 is the "all" community
ws.chatserver.do_send(JoinCommunityRoom {
community_id: 0,
id,
});
}
}
}
Ok(GetCommentsResponse { comments })
}
}
pub async fn send_local_notifs(
mentions: Vec<MentionData>,
comment: Comment,
user: &User_,
post: Post,
pool: &DbPool,
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do_send_email: bool,
) -> Result<Vec<i32>, LemmyError> {
let user2 = user.clone();
let ids = blocking(pool, move |conn| {
do_send_local_notifs(conn, &mentions, &comment, &user2, &post, do_send_email)
})
.await?;
Ok(ids)
}
fn do_send_local_notifs(
conn: &diesel::PgConnection,
mentions: &[MentionData],
comment: &Comment,
user: &User_,
post: &Post,
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do_send_email: bool,
) -> Vec<i32> {
let mut recipient_ids = Vec::new();
let hostname = &format!("https://{}", Settings::get().hostname);
// Send the local mentions
for mention in mentions
.iter()
.filter(|m| m.is_local() && m.name.ne(&user.name))
.collect::<Vec<&MentionData>>()
{
if let Ok(mention_user) = User_::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.id);
let user_mention_form = UserMentionForm {
recipient_id: mention_user.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
match UserMention::create(&conn, &user_mention_form) {
Ok(_mention) => (),
Err(_e) => error!("{}", &_e),
};
// Send an email to those users that have notifications on
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if do_send_email && mention_user.send_notifications_to_email {
if let Some(mention_email) = mention_user.email {
let subject = &format!("{} - Mentioned by {}", Settings::get().hostname, user.name,);
let html = &format!(
"<h1>User Mention</h1><br><div>{} - {}</div><br><a href={}/inbox>inbox</a>",
user.name, comment.content, hostname
);
match send_email(subject, &mention_email, &mention_user.name, html) {
Ok(_o) => _o,
Err(e) => error!("{}", e),
};
}
}
}
}
// Send notifs to the parent commenter / poster
match comment.parent_id {
Some(parent_id) => {
if let Ok(parent_comment) = Comment::read(&conn, parent_id) {
if parent_comment.creator_id != user.id {
if let Ok(parent_user) = User_::read(&conn, parent_comment.creator_id) {
recipient_ids.push(parent_user.id);
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if do_send_email && parent_user.send_notifications_to_email {
if let Some(comment_reply_email) = parent_user.email {
let subject = &format!("{} - Reply from {}", Settings::get().hostname, user.name,);
let html = &format!(
"<h1>Comment Reply</h1><br><div>{} - {}</div><br><a href={}/inbox>inbox</a>",
user.name, comment.content, hostname
);
match send_email(subject, &comment_reply_email, &parent_user.name, html) {
Ok(_o) => _o,
Err(e) => error!("{}", e),
};
}
}
}
}
}
}
// Its a post
None => {
if post.creator_id != user.id {
if let Ok(parent_user) = User_::read(&conn, post.creator_id) {
recipient_ids.push(parent_user.id);
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if do_send_email && parent_user.send_notifications_to_email {
if let Some(post_reply_email) = parent_user.email {
let subject = &format!("{} - Reply from {}", Settings::get().hostname, user.name,);
let html = &format!(
"<h1>Post Reply</h1><br><div>{} - {}</div><br><a href={}/inbox>inbox</a>",
user.name, comment.content, hostname
);
match send_email(subject, &post_reply_email, &parent_user.name, html) {
Ok(_o) => _o,
Err(e) => error!("{}", e),
};
}
}
}
}
}
};
recipient_ids
}