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   fetcher::post_or_comment::PostOrComment,
  14   generate_local_apub_endpoint,
  15   objects::post::ApubPost,
  16   protocol::activities::{
  17     create_or_update::post::CreateOrUpdatePost,
  18     voting::vote::{Vote, VoteType},
  19     CreateOrUpdateType,
  20   },
  21   EndpointType,
  22 };
  23 use lemmy_db_schema::{
  24   source::post::{Post, PostForm, PostLike, PostLikeForm},
  25   traits::{Crud, Likeable},
  26 };
  27 use lemmy_utils::{
  28   request::fetch_site_data,
  29   utils::{check_slurs, check_slurs_opt, clean_url_params, is_valid_post_title},
  30   ConnectionId,
  31   LemmyError,
  32 };
  33 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
  34 use tracing::{warn, Instrument};
  35 use url::Url;
  36 use webmention::{Webmention, WebmentionError};
  37
  38 #[async_trait::async_trait(?Send)]
  39 impl PerformCrud for CreatePost {
  40   type Response = PostResponse;
  41
  42   #[tracing::instrument(skip(context, websocket_id))]
  43   async fn perform(
  44     &self,
  45     context: &Data<LemmyContext>,
  46     websocket_id: Option<ConnectionId>,
  47   ) -> Result<PostResponse, LemmyError> {
  48     let data: &CreatePost = self;
  49     let local_user_view =
  50       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  51
  52     let slur_regex = &context.settings().slur_regex();
  53     check_slurs(&data.name, slur_regex)?;
  54     check_slurs_opt(&data.body, slur_regex)?;
  55     honeypot_check(&data.honeypot)?;
  56
  57     if !is_valid_post_title(&data.name) {
  58       return Err(LemmyError::from_message("invalid_post_title"));
  59     }
  60
  61     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  62     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  63
  64     // Fetch post links and pictrs cached image
  65     let data_url = data.url.as_ref();
  66     let (metadata_res, pictrs_thumbnail) =
  67       fetch_site_data(context.client(), &context.settings(), data_url).await;
  68     let (embed_title, embed_description, embed_html) = metadata_res
  69       .map(|u| (u.title, u.description, u.html))
  70       .unwrap_or((None, None, None));
  71
  72     let post_form = PostForm {
  73       name: data.name.trim().to_owned(),
  74       url: data_url.map(|u| clean_url_params(u.to_owned()).into()),
  75       body: data.body.to_owned(),
  76       community_id: data.community_id,
  77       creator_id: local_user_view.person.id,
  78       nsfw: data.nsfw,
  79       embed_title,
  80       embed_description,
  81       embed_html,
  82       thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
  83       ..PostForm::default()
  84     };
  85
  86     let inserted_post =
  87       match blocking(context.pool(), move |conn| Post::create(conn, &post_form)).await? {
  88         Ok(post) => post,
  89         Err(e) => {
  90           let err_type = if e.to_string() == "value too long for type character varying(200)" {
  91             "post_title_too_long"
  92           } else {
  93             "couldnt_create_post"
  94           };
  95
  96           return Err(LemmyError::from(e).with_message(err_type));
  97         }
  98       };
  99
 100     let inserted_post_id = inserted_post.id;
 101     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 102     let updated_post = blocking(context.pool(), move |conn| -> Result<Post, LemmyError> {
 103       let apub_id = generate_local_apub_endpoint(
 104         EndpointType::Post,
 105         &inserted_post_id.to_string(),
 106         &protocol_and_hostname,
 107       )?;
 108       Ok(Post::update_ap_id(conn, inserted_post_id, apub_id)?)
 109     })
 110     .await?
 111     .map_err(LemmyError::from)
 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     if blocking(context.pool(), like).await?.is_err() {
 125       return Err(LemmyError::from_message("couldnt_like_post"));
 126     }
 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     let object = PostOrComment::Post(Box::new(apub_post));
 155     Vote::send(
 156       &object,
 157       &local_user_view.person.clone().into(),
 158       inserted_post.community_id,
 159       VoteType::Like,
 160       context,
 161     )
 162     .await?;
 163
 164     send_post_ws_message(
 165       inserted_post.id,
 166       UserOperationCrud::CreatePost,
 167       websocket_id,
 168       Some(local_user_view.person.id),
 169       context,
 170     )
 171     .await
 172   }
 173 }