lemmy/crates/api_crud/src/comment/create.rs

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use activitypub_federation::config::Data;
use actix_web::web::Json;
use lemmy_api_common::{
build_response::{build_comment_response, send_local_notifs},
comment::{CommentResponse, CreateComment},
context::LemmyContext,
send_activity::{ActivityChannel, SendActivityData},
utils::{
check_community_ban,
check_community_deleted_or_removed,
check_post_deleted_or_removed,
generate_local_apub_endpoint,
get_post,
local_site_to_slur_regex,
local_user_view_from_jwt,
sanitize_html,
EndpointType,
},
};
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use lemmy_db_schema::{
impls::actor_language::default_post_language,
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source::{
actor_language::CommunityLanguage,
comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm},
comment_reply::{CommentReply, CommentReplyUpdateForm},
local_site::LocalSite,
person_mention::{PersonMention, PersonMentionUpdateForm},
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},
traits::{Crud, Likeable},
};
use lemmy_utils::{
error::{LemmyError, LemmyErrorExt, LemmyErrorType},
utils::{
mention::scrape_text_for_mentions,
slurs::remove_slurs,
validation::is_valid_body_field,
},
};
use std::ops::Deref;
const MAX_COMMENT_DEPTH_LIMIT: usize = 100;
#[tracing::instrument(skip(context))]
pub async fn create_comment(
data: Json<CreateComment>,
context: Data<LemmyContext>,
) -> Result<Json<CommentResponse>, LemmyError> {
let local_user_view = local_user_view_from_jwt(&data.auth, &context).await?;
let local_site = LocalSite::read(&mut context.pool()).await?;
let content = remove_slurs(
&data.content.clone(),
&local_site_to_slur_regex(&local_site),
);
is_valid_body_field(&Some(content.clone()), false)?;
let content = sanitize_html(&content);
// Check for a community ban
let post_id = data.post_id;
let post = get_post(post_id, &mut context.pool()).await?;
let community_id = post.community_id;
check_community_ban(local_user_view.person.id, community_id, &mut context.pool()).await?;
check_community_deleted_or_removed(community_id, &mut context.pool()).await?;
check_post_deleted_or_removed(&post)?;
// Check if post is locked, no new comments
if post.locked {
return Err(LemmyErrorType::Locked)?;
}
// Fetch the parent, if it exists
let parent_opt = if let Some(parent_id) = data.parent_id {
Comment::read(&mut context.pool(), parent_id).await.ok()
} else {
None
};
// If there's a parent_id, check to make sure that comment is in that post
// Strange issue where sometimes the post ID of the parent comment is incorrect
if let Some(parent) = parent_opt.as_ref() {
if parent.post_id != post_id {
return Err(LemmyErrorType::CouldntCreateComment)?;
}
check_comment_depth(parent)?;
}
CommunityLanguage::is_allowed_community_language(
&mut context.pool(),
data.language_id,
community_id,
)
.await?;
// attempt to set default language if none was provided
let language_id = match data.language_id {
Some(lid) => Some(lid),
None => {
default_post_language(
&mut context.pool(),
community_id,
local_user_view.local_user.id,
)
.await?
}
};
let comment_form = CommentInsertForm::builder()
.content(content.clone())
.post_id(data.post_id)
.creator_id(local_user_view.person.id)
.language_id(language_id)
.build();
// Create the comment
let parent_path = parent_opt.clone().map(|t| t.path);
let inserted_comment = Comment::create(&mut context.pool(), &comment_form, parent_path.as_ref())
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.await
.with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
// Necessary to update the ap_id
let inserted_comment_id = inserted_comment.id;
let protocol_and_hostname = context.settings().get_protocol_and_hostname();
let apub_id = generate_local_apub_endpoint(
EndpointType::Comment,
&inserted_comment_id.to_string(),
&protocol_and_hostname,
)?;
let updated_comment = Comment::update(
&mut context.pool(),
inserted_comment_id,
&CommentUpdateForm::builder().ap_id(Some(apub_id)).build(),
)
.await
.with_lemmy_type(LemmyErrorType::CouldntCreateComment)?;
// Scan the comment for user mentions, add those rows
let mentions = scrape_text_for_mentions(&content);
let recipient_ids = send_local_notifs(
mentions,
&updated_comment,
&local_user_view.person,
&post,
true,
&context,
)
.await?;
// You like your own comment by default
let like_form = CommentLikeForm {
comment_id: inserted_comment.id,
post_id: post.id,
person_id: local_user_view.person.id,
score: 1,
};
CommentLike::like(&mut context.pool(), &like_form)
.await
.with_lemmy_type(LemmyErrorType::CouldntLikeComment)?;
ActivityChannel::submit_activity(
SendActivityData::CreateComment(updated_comment.clone()),
&context,
)
.await?;
// If its a reply, mark the parent as read
if let Some(parent) = parent_opt {
let parent_id = parent.id;
let comment_reply = CommentReply::read_by_comment(&mut context.pool(), parent_id).await;
if let Ok(reply) = comment_reply {
CommentReply::update(
&mut context.pool(),
reply.id,
&CommentReplyUpdateForm { read: Some(true) },
)
.await
.with_lemmy_type(LemmyErrorType::CouldntUpdateReplies)?;
}
// If the parent has PersonMentions mark them as read too
let person_id = local_user_view.person.id;
let person_mention =
PersonMention::read_by_comment_and_person(&mut context.pool(), parent_id, person_id).await;
if let Ok(mention) = person_mention {
PersonMention::update(
&mut context.pool(),
mention.id,
&PersonMentionUpdateForm { read: Some(true) },
)
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.await
.with_lemmy_type(LemmyErrorType::CouldntUpdatePersonMentions)?;
}
}
Ok(Json(
build_comment_response(
context.deref(),
inserted_comment.id,
Some(local_user_view),
data.form_id.clone(),
recipient_ids,
)
.await?,
))
}
pub fn check_comment_depth(comment: &Comment) -> Result<(), LemmyError> {
let path = &comment.path.0;
let length = path.split('.').count();
if length > MAX_COMMENT_DEPTH_LIMIT {
Err(LemmyErrorType::MaxCommentDepthReached)?
} else {
Ok(())
}
}