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   get_local_user_view_from_jwt,
   7   mark_post_as_read,
   8   post::*,
   9 };
  10 use lemmy_apub::{
  11   activities::{
  12     post::create_or_update::CreateOrUpdatePost,
  13     voting::vote::{Vote, VoteType},
  14     CreateOrUpdateType,
  15   },
  16   fetcher::post_or_comment::PostOrComment,
  17   generate_apub_endpoint,
  18   EndpointType,
  19 };
  20 use lemmy_db_queries::{source::post::Post_, Crud, Likeable};
  21 use lemmy_db_schema::source::post::*;
  22 use lemmy_utils::{
  23   request::fetch_site_data,
  24   utils::{check_slurs, check_slurs_opt, clean_url_params, is_valid_post_title},
  25   ApiError,
  26   ConnectionId,
  27   LemmyError,
  28 };
  29 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
  30 use log::warn;
  31 use webmention::{Webmention, WebmentionError};
  32
  33 #[async_trait::async_trait(?Send)]
  34 impl PerformCrud for CreatePost {
  35   type Response = PostResponse;
  36
  37   async fn perform(
  38     &self,
  39     context: &Data<LemmyContext>,
  40     websocket_id: Option<ConnectionId>,
  41   ) -> Result<PostResponse, LemmyError> {
  42     let data: &CreatePost = self;
  43     let local_user_view =
  44       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  45
  46     let slur_regex = &context.settings().slur_regex();
  47     check_slurs(&data.name, slur_regex)?;
  48     check_slurs_opt(&data.body, slur_regex)?;
  49
  50     if !is_valid_post_title(&data.name) {
  51       return Err(ApiError::err("invalid_post_title").into());
  52     }
  53
  54     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  55
  56     // Fetch post links and pictrs cached image
  57     let data_url = data.url.as_ref();
  58     let (metadata_res, pictrs_thumbnail) =
  59       fetch_site_data(context.client(), &context.settings(), data_url).await;
  60     let (embed_title, embed_description, embed_html) = metadata_res
  61       .map(|u| (u.title, u.description, u.html))
  62       .unwrap_or((None, None, None));
  63
  64     let post_form = PostForm {
  65       name: data.name.trim().to_owned(),
  66       url: data_url.map(|u| clean_url_params(u.to_owned()).into()),
  67       body: data.body.to_owned(),
  68       community_id: data.community_id,
  69       creator_id: local_user_view.person.id,
  70       nsfw: data.nsfw,
  71       embed_title,
  72       embed_description,
  73       embed_html,
  74       thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
  75       ..PostForm::default()
  76     };
  77
  78     let inserted_post =
  79       match blocking(context.pool(), move |conn| Post::create(conn, &post_form)).await? {
  80         Ok(post) => post,
  81         Err(e) => {
  82           let err_type = if e.to_string() == "value too long for type character varying(200)" {
  83             "post_title_too_long"
  84           } else {
  85             "couldnt_create_post"
  86           };
  87
  88           return Err(ApiError::err(err_type).into());
  89         }
  90       };
  91
  92     let inserted_post_id = inserted_post.id;
  93     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
  94     let updated_post = blocking(context.pool(), move |conn| -> Result<Post, LemmyError> {
  95       let apub_id = generate_apub_endpoint(
  96         EndpointType::Post,
  97         &inserted_post_id.to_string(),
  98         &protocol_and_hostname,
  99       )?;
 100       Ok(Post::update_ap_id(conn, inserted_post_id, apub_id)?)
 101     })
 102     .await?
 103     .map_err(|_| ApiError::err("couldnt_create_post"))?;
 104
 105     CreateOrUpdatePost::send(
 106       &updated_post,
 107       &local_user_view.person,
 108       CreateOrUpdateType::Create,
 109       context,
 110     )
 111     .await?;
 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("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 = Webmention::new(
 132         updated_post.ap_id.clone().into_inner(),
 133         url.clone().into_inner(),
 134       )?;
 135       webmention.set_checked(true);
 136       match webmention.send().await {
 137         Ok(_) => {}
 138         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 139         Err(e) => warn!("Failed to send webmention: {}", e),
 140       }
 141     }
 142
 143     let object = PostOrComment::Post(Box::new(updated_post));
 144     Vote::send(
 145       &object,
 146       &local_user_view.person,
 147       inserted_post.community_id,
 148       VoteType::Like,
 149       context,
 150     )
 151     .await?;
 152
 153     send_post_ws_message(
 154       inserted_post.id,
 155       UserOperationCrud::CreatePost,
 156       websocket_id,
 157       Some(local_user_view.person.id),
 158       context,
 159     )
 160     .await
 161   }
 162 }