crates/api_crud/src/post/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   generate_local_apub_endpoint,
   5   post::{CreatePost, PostResponse},
   6   request::fetch_site_data,
   7   utils::{
   8     check_community_ban,
   9     check_community_deleted_or_removed,
  10     get_local_user_view_from_jwt,
  11     honeypot_check,
  12     local_site_to_slur_regex,
  13     mark_post_as_read,
  14   },
  15   websocket::{send::send_post_ws_message, UserOperationCrud},
  16   EndpointType,
  17   LemmyContext,
  18 };
  19 use lemmy_apub::{
  20   objects::post::ApubPost,
  21   protocol::activities::{create_or_update::page::CreateOrUpdatePage, CreateOrUpdateType},
  22 };
  23 use lemmy_db_schema::{
  24   impls::actor_language::default_post_language,
  25   source::{
  26     actor_language::CommunityLanguage,
  27     community::Community,
  28     local_site::LocalSite,
  29     post::{Post, PostInsertForm, PostLike, PostLikeForm, PostUpdateForm},
  30   },
  31   traits::{Crud, Likeable},
  32 };
  33 use lemmy_db_views_actor::structs::CommunityView;
  34 use lemmy_utils::{
  35   error::LemmyError,
  36   utils::{check_slurs, check_slurs_opt, clean_url_params, is_valid_post_title},
  37   ConnectionId,
  38 };
  39 use tracing::{warn, 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, websocket_id))]
  48   async fn perform(
  49     &self,
  50     context: &Data<LemmyContext>,
  51     websocket_id: Option<ConnectionId>,
  52   ) -> Result<PostResponse, LemmyError> {
  53     let data: &CreatePost = self;
  54     let local_user_view =
  55       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  56     let local_site = LocalSite::read(context.pool()).await?;
  57
  58     let slur_regex = local_site_to_slur_regex(&local_site);
  59     check_slurs(&data.name, &slur_regex)?;
  60     check_slurs_opt(&data.body, &slur_regex)?;
  61     honeypot_check(&data.honeypot)?;
  62
  63     let data_url = data.url.as_ref();
  64     let url = data_url.map(clean_url_params).map(Into::into); // TODO no good way to handle a "clear"
  65
  66     if !is_valid_post_title(&data.name) {
  67       return Err(LemmyError::from_message("invalid_post_title"));
  68     }
  69
  70     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  71     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  72
  73     let community_id = data.community_id;
  74     let community = Community::read(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         context.pool(),
  79         local_user_view.local_user.person_id,
  80         community_id,
  81       )
  82       .await?;
  83       if !is_mod {
  84         return Err(LemmyError::from_message("only_mods_can_post_in_community"));
  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).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(context.pool(), community_id, local_user_view.local_user.id).await?
  99       }
 100     };
 101     CommunityLanguage::is_allowed_community_language(context.pool(), language_id, community_id)
 102       .await?;
 103
 104     let post_form = PostInsertForm::builder()
 105       .name(data.name.trim().to_owned())
 106       .url(url)
 107       .body(data.body.clone())
 108       .community_id(data.community_id)
 109       .creator_id(local_user_view.person.id)
 110       .nsfw(data.nsfw)
 111       .embed_title(embed_title)
 112       .embed_description(embed_description)
 113       .embed_video_url(embed_video_url)
 114       .language_id(language_id)
 115       .thumbnail_url(thumbnail_url)
 116       .build();
 117
 118     let inserted_post = match Post::create(context.pool(), &post_form).await {
 119       Ok(post) => post,
 120       Err(e) => {
 121         let err_type = if e.to_string() == "value too long for type character varying(200)" {
 122           "post_title_too_long"
 123         } else {
 124           "couldnt_create_post"
 125         };
 126
 127         return Err(LemmyError::from_error_message(e, err_type));
 128       }
 129     };
 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       context.pool(),
 140       inserted_post_id,
 141       &PostUpdateForm::builder().ap_id(Some(apub_id)).build(),
 142     )
 143     .await
 144     .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_post"))?;
 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(context.pool(), &like_form)
 156       .await
 157       .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
 158
 159     // Mark the post as read
 160     mark_post_as_read(person_id, post_id, context.pool()).await?;
 161
 162     if let Some(url) = &updated_post.url {
 163       let mut webmention =
 164         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 165       webmention.set_checked(true);
 166       match webmention
 167         .send()
 168         .instrument(tracing::info_span!("Sending webmention"))
 169         .await
 170       {
 171         Ok(_) => {}
 172         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 173         Err(e) => warn!("Failed to send webmention: {}", e),
 174       }
 175     }
 176
 177     let apub_post: ApubPost = updated_post.into();
 178     CreateOrUpdatePage::send(
 179       apub_post.clone(),
 180       &local_user_view.person.clone().into(),
 181       CreateOrUpdateType::Create,
 182       context,
 183     )
 184     .await?;
 185
 186     send_post_ws_message(
 187       inserted_post.id,
 188       UserOperationCrud::CreatePost,
 189       websocket_id,
 190       Some(local_user_view.person.id),
 191       context,
 192     )
 193     .await
 194   }
 195 }