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   ApiError,
  31   ConnectionId,
  32   LemmyError,
  33 };
  34 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
  35 use log::warn;
  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   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(ApiError::err_plain("invalid_post_title").into());
  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(ApiError::err(err_type, e).into());
  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(|e| ApiError::err("couldnt_create_post", e))?;
 112
 113     // They like their own post by default
 114     let person_id = local_user_view.person.id;
 115     let post_id = inserted_post.id;
 116     let like_form = PostLikeForm {
 117       post_id,
 118       person_id,
 119       score: 1,
 120     };
 121
 122     let like = move |conn: &'_ _| PostLike::like(conn, &like_form);
 123     if blocking(context.pool(), like).await?.is_err() {
 124       return Err(ApiError::err_plain("couldnt_like_post").into());
 125     }
 126
 127     // Mark the post as read
 128     mark_post_as_read(person_id, post_id, context.pool()).await?;
 129
 130     if let Some(url) = &updated_post.url {
 131       let mut webmention =
 132         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 133       webmention.set_checked(true);
 134       match webmention.send().await {
 135         Ok(_) => {}
 136         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 137         Err(e) => warn!("Failed to send webmention: {}", e),
 138       }
 139     }
 140
 141     let apub_post: ApubPost = updated_post.into();
 142     CreateOrUpdatePost::send(
 143       apub_post.clone(),
 144       &local_user_view.person.clone().into(),
 145       CreateOrUpdateType::Create,
 146       context,
 147     )
 148     .await?;
 149     let object = PostOrComment::Post(Box::new(apub_post));
 150     Vote::send(
 151       &object,
 152       &local_user_view.person.clone().into(),
 153       inserted_post.community_id,
 154       VoteType::Like,
 155       context,
 156     )
 157     .await?;
 158
 159     send_post_ws_message(
 160       inserted_post.id,
 161       UserOperationCrud::CreatePost,
 162       websocket_id,
 163       Some(local_user_view.person.id),
 164       context,
 165     )
 166     .await
 167   }
 168 }