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,
  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(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(local_user_view.person.id, data.community_id, context.pool()).await?;
  66     check_community_deleted_or_removed(data.community_id, context.pool()).await?;
  67
  68     let community_id = data.community_id;
  69     let community = Community::read(context.pool(), community_id).await?;
  70     if community.posting_restricted_to_mods {
  71       let community_id = data.community_id;
  72       let is_mod = CommunityView::is_mod_or_admin(
  73         context.pool(),
  74         local_user_view.local_user.person_id,
  75         community_id,
  76       )
  77       .await?;
  78       if !is_mod {
  79         return Err(LemmyError::from_message("only_mods_can_post_in_community"));
  80       }
  81     }
  82
  83     // Fetch post links and pictrs cached image
  84     let (metadata_res, thumbnail_url) =
  85       fetch_site_data(context.client(), context.settings(), data_url, true).await;
  86     let (embed_title, embed_description, embed_video_url) = metadata_res
  87       .map(|u| (u.title, u.description, u.embed_video_url))
  88       .unwrap_or_default();
  89
  90     let language_id = match data.language_id {
  91       Some(lid) => Some(lid),
  92       None => {
  93         default_post_language(context.pool(), community_id, local_user_view.local_user.id).await?
  94       }
  95     };
  96     CommunityLanguage::is_allowed_community_language(context.pool(), language_id, community_id)
  97       .await?;
  98
  99     let post_form = PostInsertForm::builder()
 100       .name(data.name.trim().to_owned())
 101       .url(url)
 102       .body(data.body.clone())
 103       .community_id(data.community_id)
 104       .creator_id(local_user_view.person.id)
 105       .nsfw(data.nsfw)
 106       .embed_title(embed_title)
 107       .embed_description(embed_description)
 108       .embed_video_url(embed_video_url)
 109       .language_id(language_id)
 110       .thumbnail_url(thumbnail_url)
 111       .build();
 112
 113     let inserted_post = Post::create(context.pool(), &post_form)
 114       .await
 115       .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_post"))?;
 116
 117     let inserted_post_id = inserted_post.id;
 118     let protocol_and_hostname = context.settings().get_protocol_and_hostname();
 119     let apub_id = generate_local_apub_endpoint(
 120       EndpointType::Post,
 121       &inserted_post_id.to_string(),
 122       &protocol_and_hostname,
 123     )?;
 124     let updated_post = Post::update(
 125       context.pool(),
 126       inserted_post_id,
 127       &PostUpdateForm::builder().ap_id(Some(apub_id)).build(),
 128     )
 129     .await
 130     .map_err(|e| LemmyError::from_error_message(e, "couldnt_create_post"))?;
 131
 132     // They like their own post by default
 133     let person_id = local_user_view.person.id;
 134     let post_id = inserted_post.id;
 135     let like_form = PostLikeForm {
 136       post_id,
 137       person_id,
 138       score: 1,
 139     };
 140
 141     PostLike::like(context.pool(), &like_form)
 142       .await
 143       .map_err(|e| LemmyError::from_error_message(e, "couldnt_like_post"))?;
 144
 145     // Mark the post as read
 146     mark_post_as_read(person_id, post_id, context.pool()).await?;
 147
 148     if let Some(url) = updated_post.url.clone() {
 149       let task = async move {
 150         let mut webmention =
 151           Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
 152         webmention.set_checked(true);
 153         match webmention
 154           .send()
 155           .instrument(tracing::info_span!("Sending webmention"))
 156           .await
 157         {
 158           Err(WebmentionError::NoEndpointDiscovered(_)) => Ok(()),
 159           Ok(_) => Ok(()),
 160           Err(e) => Err(LemmyError::from_error_message(
 161             e,
 162             "Couldn't send webmention",
 163           )),
 164         }
 165       };
 166       if *SYNCHRONOUS_FEDERATION {
 167         task.await?;
 168       } else {
 169         spawn_try_task(task);
 170       }
 171     };
 172
 173     build_post_response(context, community_id, person_id, post_id).await
 174   }
 175 }