crates/api_crud/src/post/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   build_response::build_post_response,
   5   context::LemmyContext,
   6   post::{CreatePost, PostResponse},
   7   request::fetch_site_data,
   8   utils::{
   9     check_community_ban,
  10     check_community_deleted_or_removed,
  11     generate_local_apub_endpoint,
  12     honeypot_check,
  13     local_site_to_slur_regex,
  14     local_user_view_from_jwt,
  15     mark_post_as_read,
  16     EndpointType,
  17   },
  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, LemmyErrorExt, LemmyErrorType},
  32   spawn_try_task,
  33   utils::{
  34     slurs::{check_slurs, check_slurs_opt},
  35     validation::{check_url_scheme, clean_url_params, is_valid_body_field, is_valid_post_title},
  36   },
  37   SYNCHRONOUS_FEDERATION,
  38 };
  39 use tracing::Instrument;
  40 use url::Url;
  41 use webmention::{Webmention, WebmentionError};
  42
  43 #[async_trait::async_trait(?Send)]
  44 impl PerformCrud for CreatePost {
  45   type Response = PostResponse;
  46
  47   #[tracing::instrument(skip(context))]
  48   async fn perform(&self, context: &Data<LemmyContext>) -> Result<PostResponse, LemmyError> {
  49     let data: &CreatePost = self;
  50     let local_user_view = local_user_view_from_jwt(&data.auth, context).await?;
  51     let local_site = LocalSite::read(&mut context.pool()).await?;
  52
  53     let slur_regex = local_site_to_slur_regex(&local_site);
  54     check_slurs(&data.name, &slur_regex)?;
  55     check_slurs_opt(&data.body, &slur_regex)?;
  56     honeypot_check(&data.honeypot)?;
  57
  58     let data_url = data.url.as_ref();
  59     let url = data_url.map(clean_url_params).map(Into::into); // TODO no good way to handle a "clear"
  60
  61     is_valid_post_title(&data.name)?;
  62     is_valid_body_field(&data.body, true)?;
  63     check_url_scheme(&data.url)?;
  64
  65     check_community_ban(
  66       local_user_view.person.id,
  67       data.community_id,
  68       &mut context.pool(),
  69     )
  70     .await?;
  71     check_community_deleted_or_removed(data.community_id, &mut context.pool()).await?;
  72
  73     let community_id = data.community_id;
  74     let community = Community::read(&mut context.pool(), community_id).await?;
  75     if community.posting_restricted_to_mods {
  76       let community_id = data.community_id;
  77       let is_mod = CommunityView::is_mod_or_admin(
  78         &mut context.pool(),
  79         local_user_view.local_user.person_id,
  80         community_id,
  81       )
  82       .await?;
  83       if !is_mod {
  84         return Err(LemmyErrorType::OnlyModsCanPostInCommunity)?;
  85       }
  86     }
  87
  88     // Fetch post links and pictrs cached image
  89     let (metadata_res, thumbnail_url) =
  90       fetch_site_data(context.client(), context.settings(), data_url, true).await;
  91     let (embed_title, embed_description, embed_video_url) = metadata_res
  92       .map(|u| (u.title, u.description, u.embed_video_url))
  93       .unwrap_or_default();
  94
  95     let language_id = match data.language_id {
  96       Some(lid) => Some(lid),
  97       None => {
  98         default_post_language(
  99           &mut context.pool(),
 100           community_id,
 101           local_user_view.local_user.id,
 102         )
 103         .await?
 104       }
 105     };
 106     CommunityLanguage::is_allowed_community_language(
 107       &mut context.pool(),
 108       language_id,
 109       community_id,
 110     )
 111     .await?;
 112
 113     let post_form = PostInsertForm::builder()
 114       .name(data.name.trim().to_owned())
 115       .url(url)
 116       .body(data.body.clone())
 117       .community_id(data.community_id)
 118       .creator_id(local_user_view.person.id)
 119       .nsfw(data.nsfw)
 120       .embed_title(embed_title)
 121       .embed_description(embed_description)
 122       .embed_video_url(embed_video_url)
 123       .language_id(language_id)
 124       .thumbnail_url(thumbnail_url)
 125       .build();
 126
 127     let inserted_post = Post::create(&mut context.pool(), &post_form)
 128       .await
 129       .with_lemmy_type(LemmyErrorType::CouldntCreatePost)?;
 130
 131     let inserted_post_id = inserted_post.id;
 132     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 133     let apub_id = generate_local_apub_endpoint(
 134       EndpointType::Post,
 135       &inserted_post_id.to_string(),
 136       &protocol_and_hostname,
 137     )?;
 138     let updated_post = Post::update(
 139       &mut context.pool(),
 140       inserted_post_id,
 141       &PostUpdateForm::builder().ap_id(Some(apub_id)).build(),
 142     )
 143     .await
 144     .with_lemmy_type(LemmyErrorType::CouldntCreatePost)?;
 145
 146     // They like their own post by default
 147     let person_id = local_user_view.person.id;
 148     let post_id = inserted_post.id;
 149     let like_form = PostLikeForm {
 150       post_id,
 151       person_id,
 152       score: 1,
 153     };
 154
 155     PostLike::like(&mut context.pool(), &like_form)
 156       .await
 157       .with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
 158
 159     // Mark the post as read
 160     mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
 161
 162     if let Some(url) = updated_post.url.clone() {
 163       let task = async move {
 164         let mut webmention =
 165           Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 166         webmention.set_checked(true);
 167         match webmention
 168           .send()
 169           .instrument(tracing::info_span!("Sending webmention"))
 170           .await
 171         {
 172           Err(WebmentionError::NoEndpointDiscovered(_)) => Ok(()),
 173           Ok(_) => Ok(()),
 174           Err(e) => Err(e).with_lemmy_type(LemmyErrorType::CouldntSendWebmention),
 175         }
 176       };
 177       if *SYNCHRONOUS_FEDERATION {
 178         task.await?;
 179       } else {
 180         spawn_try_task(task);
 181       }
 182     };
 183
 184     build_post_response(context, community_id, person_id, post_id).await
 185   }
 186 }