use crate::PerformCrud; use actix_web::web::Data; use lemmy_api_common::{ build_response::{build_comment_response, send_local_notifs}, comment::{CommentResponse, CreateComment}, context::LemmyContext, 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, EndpointType, }, }; use lemmy_db_schema::{ 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_utils::{ error::LemmyError, utils::{ mention::scrape_text_for_mentions, slurs::remove_slurs, validation::is_valid_body_field, }, }; const MAX_COMMENT_DEPTH_LIMIT: usize = 100; #[async_trait::async_trait(?Send)] impl PerformCrud for CreateComment { type Response = CommentResponse; #[tracing::instrument(skip(context))] async fn perform(&self, context: &Data) -> Result { let data: &CreateComment = self; let local_user_view = local_user_view_from_jwt(&data.auth, context).await?; let local_site = LocalSite::read(context.pool()).await?; let content_slurs_removed = remove_slurs( &data.content.clone(), &local_site_to_slur_regex(&local_site), ); is_valid_body_field(&Some(content_slurs_removed.clone()), false)?; // Check for a community ban let post_id = data.post_id; let post = get_post(post_id, context.pool()).await?; let community_id = post.community_id; check_community_ban(local_user_view.person.id, community_id, context.pool()).await?; check_community_deleted_or_removed(community_id, context.pool()).await?; check_post_deleted_or_removed(&post)?; // Check if post is locked, no new comments if post.locked { return Err(LemmyError::from_message("locked")); } // Fetch the parent, if it exists let parent_opt = if let Some(parent_id) = data.parent_id { Comment::read(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(LemmyError::from_message("couldnt_create_comment")); } check_comment_depth(parent)?; } // if no language is set, copy language from parent post/comment let parent_language = parent_opt .as_ref() .map(|p| p.language_id) .unwrap_or(post.language_id); let language_id = data.language_id.unwrap_or(parent_language); CommunityLanguage::is_allowed_community_language( context.pool(), Some(language_id), community_id, ) .await?; let comment_form = CommentInsertForm::builder() .content(content_slurs_removed.clone()) .post_id(data.post_id) .creator_id(local_user_view.person.id) .language_id(Some(language_id)) .build(); // Create the comment let parent_path = parent_opt.clone().map(|t| t.path); let inserted_comment = Comment::create(context.pool(), &comment_form, parent_path.as_ref()) .await .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_comment"))?; // 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( context.pool(), inserted_comment_id, &CommentUpdateForm::builder().ap_id(Some(apub_id)).build(), ) .await .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_comment"))?; // Scan the comment for user mentions, add those rows let mentions = scrape_text_for_mentions(&content_slurs_removed); 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(context.pool(), &like_form) .await .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_comment"))?; // 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(context.pool(), parent_id).await; if let Ok(reply) = comment_reply { CommentReply::update( context.pool(), reply.id, &CommentReplyUpdateForm { read: Some(true) }, ) .await .map_err(|e| LemmyError::from_error_message(e, "couldnt_update_replies"))?; } // 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(context.pool(), parent_id, person_id).await; if let Ok(mention) = person_mention { PersonMention::update( context.pool(), mention.id, &PersonMentionUpdateForm { read: Some(true) }, ) .await .map_err(|e| LemmyError::from_error_message(e, "couldnt_update_person_mentions"))?; } } build_comment_response( context, inserted_comment.id, Some(local_user_view), self.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(LemmyError::from_message("max_comment_depth_reached")) } else { Ok(()) } }