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, EndpointType, }, }; use lemmy_db_schema::{ impls::actor_language::default_post_language, source::{ actor_language::CommunityLanguage, comment::{Comment, CommentInsertForm, CommentLike, CommentLikeForm, CommentUpdateForm}, comment_reply::{CommentReply, CommentReplyUpdateForm}, local_site::LocalSite, person_mention::{PersonMention, PersonMentionUpdateForm}, }, traits::{Crud, Likeable}, }; use lemmy_db_views::structs::LocalUserView; use lemmy_utils::{ error::{LemmyError, LemmyErrorExt, LemmyErrorType}, utils::{ mention::scrape_text_for_mentions, slurs::remove_slurs, validation::is_valid_body_field, }, }; const MAX_COMMENT_DEPTH_LIMIT: usize = 100; #[tracing::instrument(skip(context))] pub async fn create_comment( data: Json, context: Data, local_user_view: LocalUserView, ) -> Result, LemmyError> { 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)?; // 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 { 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 { 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()) .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 { ap_id: Some(apub_id), ..Default::default() }, ) .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) }, ) .await .with_lemmy_type(LemmyErrorType::CouldntUpdatePersonMentions)?; } } Ok(Json( build_comment_response( &context, inserted_comment.id, Some(local_user_view), 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(()) } }