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