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::{
  33     slurs::{check_slurs, check_slurs_opt},
  34     validation::{clean_url_params, 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 =
  54       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  55     let local_site = LocalSite::read(context.pool()).await?;
  56
  57     let slur_regex = local_site_to_slur_regex(&local_site);
  58     check_slurs(&data.name, &slur_regex)?;
  59     check_slurs_opt(&data.body, &slur_regex)?;
  60     honeypot_check(&data.honeypot)?;
  61
  62     let data_url = data.url.as_ref();
  63     let url = data_url.map(clean_url_params).map(Into::into); // TODO no good way to handle a "clear"
  64
  65     if !is_valid_post_title(&data.name) {
  66       return Err(LemmyError::from_message("invalid_post_title"));
  67     }
  68
  69     check_community_ban(local_user_view.person.id, data.community_id, context.pool()).await?;
  70     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  71
  72     let community_id = data.community_id;
  73     let community = Community::read(context.pool(), community_id).await?;
  74     if community.posting_restricted_to_mods {
  75       let community_id = data.community_id;
  76       let is_mod = CommunityView::is_mod_or_admin(
  77         context.pool(),
  78         local_user_view.local_user.person_id,
  79         community_id,
  80       )
  81       .await?;
  82       if !is_mod {
  83         return Err(LemmyError::from_message("only_mods_can_post_in_community"));
  84       }
  85     }
  86
  87     // Fetch post links and pictrs cached image
  88     let (metadata_res, thumbnail_url) =
  89       fetch_site_data(context.client(), context.settings(), data_url).await;
  90     let (embed_title, embed_description, embed_video_url) = metadata_res
  91       .map(|u| (u.title, u.description, u.embed_video_url))
  92       .unwrap_or_default();
  93
  94     let language_id = match data.language_id {
  95       Some(lid) => Some(lid),
  96       None => {
  97         default_post_language(context.pool(), community_id, local_user_view.local_user.id).await?
  98       }
  99     };
 100     CommunityLanguage::is_allowed_community_language(context.pool(), language_id, community_id)
 101       .await?;
 102
 103     let post_form = PostInsertForm::builder()
 104       .name(data.name.trim().to_owned())
 105       .url(url)
 106       .body(data.body.clone())
 107       .community_id(data.community_id)
 108       .creator_id(local_user_view.person.id)
 109       .nsfw(data.nsfw)
 110       .embed_title(embed_title)
 111       .embed_description(embed_description)
 112       .embed_video_url(embed_video_url)
 113       .language_id(language_id)
 114       .thumbnail_url(thumbnail_url)
 115       .build();
 116
 117     let inserted_post = match Post::create(context.pool(), &post_form).await {
 118       Ok(post) => post,
 119       Err(e) => {
 120         let err_type = if e.to_string() == "value too long for type character varying(200)" {
 121           "post_title_too_long"
 122         } else {
 123           "couldnt_create_post"
 124         };
 125
 126         return Err(LemmyError::from_error_message(e, err_type));
 127       }
 128     };
 129
 130     let inserted_post_id = inserted_post.id;
 131     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 132     let apub_id = generate_local_apub_endpoint(
 133       EndpointType::Post,
 134       &inserted_post_id.to_string(),
 135       &protocol_and_hostname,
 136     )?;
 137     let updated_post = Post::update(
 138       context.pool(),
 139       inserted_post_id,
 140       &PostUpdateForm::builder().ap_id(Some(apub_id)).build(),
 141     )
 142     .await
 143     .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_post"))?;
 144
 145     // They like their own post by default
 146     let person_id = local_user_view.person.id;
 147     let post_id = inserted_post.id;
 148     let like_form = PostLikeForm {
 149       post_id,
 150       person_id,
 151       score: 1,
 152     };
 153
 154     PostLike::like(context.pool(), &like_form)
 155       .await
 156       .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
 157
 158     // Mark the post as read
 159     mark_post_as_read(person_id, post_id, context.pool()).await?;
 160
 161     if let Some(url) = &updated_post.url {
 162       let mut webmention =
 163         Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 164       webmention.set_checked(true);
 165       match webmention
 166         .send()
 167         .instrument(tracing::info_span!("Sending webmention"))
 168         .await
 169       {
 170         Ok(_) => {}
 171         Err(WebmentionError::NoEndpointDiscovered(_)) => {}
 172         Err(e) => warn!("Failed to send webmention: {}", e),
 173       }
 174     }
 175
 176     send_post_ws_message(
 177       inserted_post.id,
 178       UserOperationCrud::CreatePost,
 179       websocket_id,
 180       Some(local_user_view.person.id),
 181       context,
 182     )
 183     .await
 184   }
 185 }