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   protocol::activities::{
  16     create_or_update::post::CreateOrUpdatePost,
  17     voting::vote::{Vote, VoteType},
  18     CreateOrUpdateType,
  19   },
  20   EndpointType,
  21 };
  22 use lemmy_db_schema::{
  23   source::post::{Post, PostForm, PostLike, PostLikeForm},
  24   traits::{Crud, Likeable},
  25 };
  26 use lemmy_utils::{
  27   request::fetch_site_data,
  28   utils::{check_slurs, check_slurs_opt, clean_url_params, is_valid_post_title},
  29   ApiError,
  30   ConnectionId,
  31   LemmyError,
  32 };
  33 use lemmy_websocket::{send::send_post_ws_message, LemmyContext, UserOperationCrud};
  34 use log::warn;
  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   async fn perform(
  43     &self,
  44     context: &Data<LemmyContext>,
  45     websocket_id: Option<ConnectionId>,
  46   ) -> Result<PostResponse, LemmyError> {
  47     let data: &CreatePost = self;
  48     let local_user_view =
  49       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  50
  51     let slur_regex = &context.settings().slur_regex();
  52     check_slurs(&data.name, slur_regex)?;
  53     check_slurs_opt(&data.body, slur_regex)?;
  54     honeypot_check(&data.honeypot)?;
  55
  56     if !is_valid_post_title(&data.name) {
  57       return Err(ApiError::err_plain("invalid_post_title").into());
  58     }
  59
  60     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  61     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  62
  63     // Fetch post links and pictrs cached image
  64     let data_url = data.url.as_ref();
  65     let (metadata_res, pictrs_thumbnail) =
  66       fetch_site_data(context.client(), &context.settings(), data_url).await;
  67     let (embed_title, embed_description, embed_html) = metadata_res
  68       .map(|u| (u.title, u.description, u.html))
  69       .unwrap_or((None, None, None));
  70
  71     let post_form = PostForm {
  72       name: data.name.trim().to_owned(),
  73       url: data_url.map(|u| clean_url_params(u.to_owned()).into()),
  74       body: data.body.to_owned(),
  75       community_id: data.community_id,
  76       creator_id: local_user_view.person.id,
  77       nsfw: data.nsfw,
  78       embed_title,
  79       embed_description,
  80       embed_html,
  81       thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
  82       ..PostForm::default()
  83     };
  84
  85     let inserted_post =
  86       match blocking(context.pool(), move |conn| Post::create(conn, &post_form)).await? {
  87         Ok(post) => post,
  88         Err(e) => {
  89           let err_type = if e.to_string() == "value too long for type character varying(200)" {
  90             "post_title_too_long"
  91           } else {
  92             "couldnt_create_post"
  93           };
  94
  95           return Err(ApiError::err(err_type, e).into());
  96         }
  97       };
  98
  99     let inserted_post_id = inserted_post.id;
 100     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 101     let updated_post = blocking(context.pool(), move |conn| -> Result<Post, LemmyError> {
 102       let apub_id = generate_local_apub_endpoint(
 103         EndpointType::Post,
 104         &inserted_post_id.to_string(),
 105         &protocol_and_hostname,
 106       )?;
 107       Ok(Post::update_ap_id(conn, inserted_post_id, apub_id)?)
 108     })
 109     .await?
 110     .map_err(|e| ApiError::err("couldnt_create_post", e))?;
 111
 112     CreateOrUpdatePost::send(
 113       &updated_post.clone().into(),
 114       &local_user_view.person.clone().into(),
 115       CreateOrUpdateType::Create,
 116       context,
 117     )
 118     .await?;
 119
 120     // They like their own post by default
 121     let person_id = local_user_view.person.id;
 122     let post_id = inserted_post.id;
 123     let like_form = PostLikeForm {
 124       post_id,
 125       person_id,
 126       score: 1,
 127     };
 128
 129     let like = move |conn: &'_ _| PostLike::like(conn, &like_form);
 130     if blocking(context.pool(), like).await?.is_err() {
 131       return Err(ApiError::err_plain("couldnt_like_post").into());
 132     }
 133
 134     // Mark the post as read
 135     mark_post_as_read(person_id, post_id, context.pool()).await?;
 136
 137     if let Some(url) = &updated_post.url {
 138       let mut webmention =
 139         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 140       webmention.set_checked(true);
 141       match webmention.send().await {
 142         Ok(_) => {}
 143         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 144         Err(e) => warn!("Failed to send webmention: {}", e),
 145       }
 146     }
 147
 148     let object = PostOrComment::Post(Box::new(updated_post.into()));
 149     Vote::send(
 150       &object,
 151       &local_user_view.person.clone().into(),
 152       inserted_post.community_id,
 153       VoteType::Like,
 154       context,
 155     )
 156     .await?;
 157
 158     send_post_ws_message(
 159       inserted_post.id,
 160       UserOperationCrud::CreatePost,
 161       websocket_id,
 162       Some(local_user_view.person.id),
 163       context,
 164     )
 165     .await
 166   }
 167 }