crates/api_crud/src/post/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   context::LemmyContext,
   5   post::{CreatePost, PostResponse},
   6   request::fetch_site_data,
   7   utils::{
   8     check_community_ban,
   9     check_community_deleted_or_removed,
  10     generate_local_apub_endpoint,
  11     honeypot_check,
  12     local_site_to_slur_regex,
  13     local_user_view_from_jwt,
  14     mark_post_as_read,
  15     EndpointType,
  16   },
  17   websocket::UserOperationCrud,
  18 };
  19 use lemmy_db_schema::{
  20   impls::actor_language::default_post_language,
  21   source::{
  22     actor_language::CommunityLanguage,
  23     community::Community,
  24     local_site::LocalSite,
  25     post::{Post, PostInsertForm, PostLike, PostLikeForm, PostUpdateForm},
  26   },
  27   traits::{Crud, Likeable},
  28 };
  29 use lemmy_db_views_actor::structs::CommunityView;
  30 use lemmy_utils::{
  31   error::LemmyError,
  32   utils::{
  33     slurs::{check_slurs, check_slurs_opt},
  34     validation::{clean_url_params, is_valid_body_field, is_valid_post_title},
  35   },
  36   ConnectionId,
  37 };
  38 use tracing::{warn, Instrument};
  39 use url::Url;
  40 use webmention::{Webmention, WebmentionError};
  41
  42 #[async_trait::async_trait(?Send)]
  43 impl PerformCrud for CreatePost {
  44   type Response = PostResponse;
  45
  46   #[tracing::instrument(skip(context, websocket_id))]
  47   async fn perform(
  48     &self,
  49     context: &Data<LemmyContext>,
  50     websocket_id: Option<ConnectionId>,
  51   ) -> Result<PostResponse, LemmyError> {
  52     let data: &CreatePost = self;
  53     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  54     let local_site = LocalSite::read(context.pool()).await?;
  55
  56     let slur_regex = local_site_to_slur_regex(&local_site);
  57     check_slurs(&data.name, &slur_regex)?;
  58     check_slurs_opt(&data.body, &slur_regex)?;
  59     honeypot_check(&data.honeypot)?;
  60
  61     let data_url = data.url.as_ref();
  62     let url = data_url.map(clean_url_params).map(Into::into); // TODO no good way to handle a "clear"
  63
  64     is_valid_post_title(&data.name)?;
  65     is_valid_body_field(&data.body)?;
  66
  67     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  68     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  69
  70     let community_id = data.community_id;
  71     let community = Community::read(context.pool(), community_id).await?;
  72     if community.posting_restricted_to_mods {
  73       let community_id = data.community_id;
  74       let is_mod = CommunityView::is_mod_or_admin(
  75         context.pool(),
  76         local_user_view.local_user.person_id,
  77         community_id,
  78       )
  79       .await?;
  80       if !is_mod {
  81         return Err(LemmyError::from_message("only_mods_can_post_in_community"));
  82       }
  83     }
  84
  85     // Fetch post links and pictrs cached image
  86     let (metadata_res, thumbnail_url) =
  87       fetch_site_data(context.client(), context.settings(), data_url).await;
  88     let (embed_title, embed_description, embed_video_url) = metadata_res
  89       .map(|u| (u.title, u.description, u.embed_video_url))
  90       .unwrap_or_default();
  91
  92     let language_id = match data.language_id {
  93       Some(lid) => Some(lid),
  94       None => {
  95         default_post_language(context.pool(), community_id, local_user_view.local_user.id).await?
  96       }
  97     };
  98     CommunityLanguage::is_allowed_community_language(context.pool(), language_id, community_id)
  99       .await?;
 100
 101     let post_form = PostInsertForm::builder()
 102       .name(data.name.trim().to_owned())
 103       .url(url)
 104       .body(data.body.clone())
 105       .community_id(data.community_id)
 106       .creator_id(local_user_view.person.id)
 107       .nsfw(data.nsfw)
 108       .embed_title(embed_title)
 109       .embed_description(embed_description)
 110       .embed_video_url(embed_video_url)
 111       .language_id(language_id)
 112       .thumbnail_url(thumbnail_url)
 113       .build();
 114
 115     let inserted_post = match Post::create(context.pool(), &post_form).await {
 116       Ok(post) => post,
 117       Err(e) => {
 118         let err_type = if e.to_string() == "value too long for type character varying(200)" {
 119           "post_title_too_long"
 120         } else {
 121           "couldnt_create_post"
 122         };
 123
 124         return Err(LemmyError::from_error_message(e, err_type));
 125       }
 126     };
 127
 128     let inserted_post_id = inserted_post.id;
 129     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 130     let apub_id = generate_local_apub_endpoint(
 131       EndpointType::Post,
 132       &inserted_post_id.to_string(),
 133       &protocol_and_hostname,
 134     )?;
 135     let updated_post = Post::update(
 136       context.pool(),
 137       inserted_post_id,
 138       &PostUpdateForm::builder().ap_id(Some(apub_id)).build(),
 139     )
 140     .await
 141     .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_post"))?;
 142
 143     // They like their own post by default
 144     let person_id = local_user_view.person.id;
 145     let post_id = inserted_post.id;
 146     let like_form = PostLikeForm {
 147       post_id,
 148       person_id,
 149       score: 1,
 150     };
 151
 152     PostLike::like(context.pool(), &like_form)
 153       .await
 154       .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
 155
 156     // Mark the post as read
 157     mark_post_as_read(person_id, post_id, context.pool()).await?;
 158
 159     if let Some(url) = &updated_post.url {
 160       let mut webmention =
 161         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 162       webmention.set_checked(true);
 163       match webmention
 164         .send()
 165         .instrument(tracing::info_span!("Sending webmention"))
 166         .await
 167       {
 168         Ok(_) => {}
 169         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 170         Err(e) => warn!("Failed to send webmention: {}", e),
 171       }
 172     }
 173
 174     context
 175       .send_post_ws_message(
 176         &UserOperationCrud::CreatePost,
 177         inserted_post.id,
 178         websocket_id,
 179         Some(local_user_view.person.id),
 180       )
 181       .await
 182   }
 183 }