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