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create.rs
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create.rs
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use activitypub_federation::config::Data;
use actix_web::web::Json;
use lemmy_api_common::{
build_response::build_post_response,
context::LemmyContext,
post::{CreatePost, PostResponse},
request::generate_post_link_metadata,
send_activity::SendActivityData,
utils::{
check_community_user_action,
generate_local_apub_endpoint,
get_url_blocklist,
honeypot_check,
local_site_to_slur_regex,
mark_post_as_read,
process_markdown_opt,
proxy_image_link_opt_apub,
EndpointType,
},
};
use lemmy_db_schema::{
impls::actor_language::default_post_language,
source::{
actor_language::CommunityLanguage,
community::Community,
local_site::LocalSite,
post::{Post, PostInsertForm, PostLike, PostLikeForm, PostUpdateForm},
},
traits::{Crud, Likeable},
CommunityVisibility,
};
use lemmy_db_views::structs::LocalUserView;
use lemmy_db_views_actor::structs::CommunityModeratorView;
use lemmy_utils::{
error::{LemmyError, LemmyErrorExt, LemmyErrorType},
spawn_try_task,
utils::{
slurs::check_slurs,
validation::{
check_url_scheme,
clean_url_params,
is_url_blocked,
is_valid_alt_text_field,
is_valid_body_field,
is_valid_post_title,
},
},
};
use tracing::Instrument;
use url::Url;
use webmention::{Webmention, WebmentionError};
#[tracing::instrument(skip(context))]
pub async fn create_post(
data: Json<CreatePost>,
context: Data<LemmyContext>,
local_user_view: LocalUserView,
) -> Result<Json<PostResponse>, LemmyError> {
let local_site = LocalSite::read(&mut context.pool()).await?;
honeypot_check(&data.honeypot)?;
let slur_regex = local_site_to_slur_regex(&local_site);
check_slurs(&data.name, &slur_regex)?;
let url_blocklist = get_url_blocklist(&context).await?;
let body = process_markdown_opt(&data.body, &slur_regex, &url_blocklist, &context).await?;
let data_url = data.url.as_ref();
let url = data_url.map(clean_url_params); // TODO no good way to handle a "clear"
let custom_thumbnail = data.custom_thumbnail.as_ref().map(clean_url_params);
is_valid_post_title(&data.name)?;
is_valid_body_field(&body, true)?;
is_valid_alt_text_field(&data.alt_text)?;
is_url_blocked(&url, &url_blocklist)?;
check_url_scheme(&url)?;
check_url_scheme(&custom_thumbnail)?;
let url = proxy_image_link_opt_apub(url, &context).await?;
check_community_user_action(
&local_user_view.person,
data.community_id,
&mut context.pool(),
)
.await?;
let community_id = data.community_id;
let community = Community::read(&mut context.pool(), community_id).await?;
if community.posting_restricted_to_mods {
let community_id = data.community_id;
let is_mod = CommunityModeratorView::is_community_moderator(
&mut context.pool(),
community_id,
local_user_view.local_user.person_id,
)
.await?;
if !is_mod {
Err(LemmyErrorType::OnlyModsCanPostInCommunity)?
}
}
// Only need to check if language is allowed in case user set it explicitly. When using default
// language, it already only returns allowed languages.
CommunityLanguage::is_allowed_community_language(
&mut context.pool(),
data.language_id,
community_id,
)
.await?;
// attempt to set default language if none was provided
let language_id = match data.language_id {
Some(lid) => Some(lid),
None => {
default_post_language(
&mut context.pool(),
community_id,
local_user_view.local_user.id,
)
.await?
}
};
let post_form = PostInsertForm::builder()
.name(data.name.trim().to_string())
.url(url)
.body(body)
.alt_text(data.alt_text.clone())
.community_id(data.community_id)
.creator_id(local_user_view.person.id)
.nsfw(data.nsfw)
.language_id(language_id)
.build();
let inserted_post = Post::create(&mut context.pool(), &post_form)
.await
.with_lemmy_type(LemmyErrorType::CouldntCreatePost)?;
let inserted_post_id = inserted_post.id;
let protocol_and_hostname = context.settings().get_protocol_and_hostname();
let apub_id = generate_local_apub_endpoint(
EndpointType::Post,
&inserted_post_id.to_string(),
&protocol_and_hostname,
)?;
let updated_post = Post::update(
&mut context.pool(),
inserted_post_id,
&PostUpdateForm {
ap_id: Some(apub_id),
..Default::default()
},
)
.await
.with_lemmy_type(LemmyErrorType::CouldntCreatePost)?;
generate_post_link_metadata(
updated_post.clone(),
custom_thumbnail,
|post| Some(SendActivityData::CreatePost(post)),
Some(local_site),
context.reset_request_count(),
);
// They like their own post by default
let person_id = local_user_view.person.id;
let post_id = inserted_post.id;
let like_form = PostLikeForm {
post_id,
person_id,
score: 1,
};
PostLike::like(&mut context.pool(), &like_form)
.await
.with_lemmy_type(LemmyErrorType::CouldntLikePost)?;
// Mark the post as read
mark_post_as_read(person_id, post_id, &mut context.pool()).await?;
if let Some(url) = updated_post.url.clone() {
if community.visibility == CommunityVisibility::Public {
spawn_try_task(async move {
let mut webmention =
Webmention::new::<Url>(updated_post.ap_id.clone().into(), url.clone().into())?;
webmention.set_checked(true);
match webmention
.send()
.instrument(tracing::info_span!("Sending webmention"))
.await
{
Err(WebmentionError::NoEndpointDiscovered(_)) => Ok(()),
Ok(_) => Ok(()),
Err(e) => Err(e).with_lemmy_type(LemmyErrorType::CouldntSendWebmention),
}
});
}
};
build_post_response(&context, community_id, &local_user_view.person, post_id).await
}