crates/api_crud/src/post/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   blocking,
   5   check_community_ban,
   6   check_community_deleted_or_removed,
   7   get_local_user_view_from_jwt,
   8   honeypot_check,
   9   mark_post_as_read,
  10   post::*,
  11 };
  12 use lemmy_apub::{
  13   generate_local_apub_endpoint,
  14   objects::post::ApubPost,
  15   protocol::activities::{create_or_update::post::CreateOrUpdatePost, CreateOrUpdateType},
  16   EndpointType,
  17 };
  18 use lemmy_db_schema::{
  19   source::post::{Post, PostForm, PostLike, PostLikeForm},
  20   traits::{Crud, Likeable},
  21 };
  22 use lemmy_utils::{
  23   request::fetch_site_data,
  24   utils::{
  25     check_slurs,
  26     check_slurs_opt,
  27     clean_optional_text,
  28     clean_url_params,
  29     is_valid_post_title,
  30   },
  31   ConnectionId,
  32   LemmyError,
  33 };
  34 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
  35 use tracing::{warn, Instrument};
  36 use url::Url;
  37 use webmention::{Webmention, WebmentionError};
  38
  39 #[async_trait::async_trait(?Send)]
  40 impl PerformCrud for CreatePost {
  41   type Response = PostResponse;
  42
  43   #[tracing::instrument(skip(context, websocket_id))]
  44   async fn perform(
  45     &self,
  46     context: &Data<LemmyContext>,
  47     websocket_id: Option<ConnectionId>,
  48   ) -> Result<PostResponse, LemmyError> {
  49     let data: &CreatePost = self;
  50     let local_user_view =
  51       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  52
  53     let slur_regex = &context.settings().slur_regex();
  54     check_slurs(&data.name, slur_regex)?;
  55     check_slurs_opt(&data.body, slur_regex)?;
  56     honeypot_check(&data.honeypot)?;
  57
  58     if !is_valid_post_title(&data.name) {
  59       return Err(LemmyError::from_message("invalid_post_title"));
  60     }
  61
  62     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  63     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  64
  65     // Fetch post links and pictrs cached image
  66     let data_url = data.url.as_ref();
  67     let (metadata_res, pictrs_thumbnail) =
  68       fetch_site_data(context.client(), &context.settings(), data_url).await;
  69     let (embed_title, embed_description, embed_html) = metadata_res
  70       .map(|u| (u.title, u.description, u.html))
  71       .unwrap_or((None, None, None));
  72
  73     let post_form = PostForm {
  74       name: data.name.trim().to_owned(),
  75       url: data_url.map(|u| clean_url_params(u.to_owned()).into()),
  76       body: clean_optional_text(&data.body),
  77       community_id: data.community_id,
  78       creator_id: local_user_view.person.id,
  79       nsfw: data.nsfw,
  80       embed_title,
  81       embed_description,
  82       embed_html,
  83       thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
  84       ..PostForm::default()
  85     };
  86
  87     let inserted_post =
  88       match blocking(context.pool(), move |conn| Post::create(conn, &post_form)).await? {
  89         Ok(post) => post,
  90         Err(e) => {
  91           let err_type = if e.to_string() == "value too long for type character varying(200)" {
  92             "post_title_too_long"
  93           } else {
  94             "couldnt_create_post"
  95           };
  96
  97           return Err(LemmyError::from_error_message(e, err_type));
  98         }
  99       };
 100
 101     let inserted_post_id = inserted_post.id;
 102     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 103     let updated_post = blocking(context.pool(), move |conn| -> Result<Post, LemmyError> {
 104       let apub_id = generate_local_apub_endpoint(
 105         EndpointType::Post,
 106         &inserted_post_id.to_string(),
 107         &protocol_and_hostname,
 108       )?;
 109       Ok(Post::update_ap_id(conn, inserted_post_id, apub_id)?)
 110     })
 111     .await?
 112     .map_err(|e| e.with_message("couldnt_create_post"))?;
 113
 114     // They like their own post by default
 115     let person_id = local_user_view.person.id;
 116     let post_id = inserted_post.id;
 117     let like_form = PostLikeForm {
 118       post_id,
 119       person_id,
 120       score: 1,
 121     };
 122
 123     let like = move |conn: &'_ _| PostLike::like(conn, &like_form);
 124     blocking(context.pool(), like)
 125       .await?
 126       .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
 127
 128     // Mark the post as read
 129     mark_post_as_read(person_id, post_id, context.pool()).await?;
 130
 131     if let Some(url) = &updated_post.url {
 132       let mut webmention =
 133         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 134       webmention.set_checked(true);
 135       match webmention
 136         .send()
 137         .instrument(tracing::info_span!("Sending webmention"))
 138         .await
 139       {
 140         Ok(_) => {}
 141         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 142         Err(e) => warn!("Failed to send webmention: {}", e),
 143       }
 144     }
 145
 146     let apub_post: ApubPost = updated_post.into();
 147     CreateOrUpdatePost::send(
 148       apub_post.clone(),
 149       &local_user_view.person.clone().into(),
 150       CreateOrUpdateType::Create,
 151       context,
 152     )
 153     .await?;
 154
 155     send_post_ws_message(
 156       inserted_post.id,
 157       UserOperationCrud::CreatePost,
 158       websocket_id,
 159       Some(local_user_view.person.id),
 160       context,
 161     )
 162     .await
 163   }
 164 }