lemmy/crates/api_crud/src/community/create.rs

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use activitypub_federation::{config::Data, http_signatures::generate_actor_keypair};
use actix_web::web::Json;
use lemmy_api_common::{
build_response::build_community_response,
community::{CommunityResponse, CreateCommunity},
context::LemmyContext,
utils::{
generate_followers_url,
generate_inbox_url,
generate_local_apub_endpoint,
generate_shared_inbox_url,
is_admin,
local_site_to_slur_regex,
EndpointType,
},
};
2021-10-16 13:33:38 +00:00
use lemmy_db_schema::{
source::{
actor_language::{CommunityLanguage, SiteLanguage},
community::{
Community,
CommunityFollower,
CommunityFollowerForm,
CommunityInsertForm,
CommunityModerator,
CommunityModeratorForm,
},
},
traits::{ApubActor, Crud, Followable, Joinable},
utils::diesel_option_overwrite_to_url_create,
};
use lemmy_db_views::structs::{LocalUserView, SiteView};
use lemmy_utils::{
error::{LemmyError, LemmyErrorExt, LemmyErrorType},
utils::{
slurs::{check_slurs, check_slurs_opt},
validation::{is_valid_actor_name, is_valid_body_field},
},
};
#[tracing::instrument(skip(context))]
pub async fn create_community(
data: Json<CreateCommunity>,
context: Data<LemmyContext>,
local_user_view: LocalUserView,
) -> Result<Json<CommunityResponse>, LemmyError> {
let site_view = SiteView::read_local(&mut context.pool()).await?;
let local_site = site_view.local_site;
if local_site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
Err(LemmyErrorType::OnlyAdminsCanCreateCommunities)?
}
// Check to make sure the icon and banners are urls
let icon = diesel_option_overwrite_to_url_create(&data.icon)?;
let banner = diesel_option_overwrite_to_url_create(&data.banner)?;
let slur_regex = local_site_to_slur_regex(&local_site);
check_slurs(&data.name, &slur_regex)?;
check_slurs(&data.title, &slur_regex)?;
check_slurs_opt(&data.description, &slur_regex)?;
is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize)?;
is_valid_body_field(&data.description, false)?;
// Double check for duplicate community actor_ids
let community_actor_id = generate_local_apub_endpoint(
EndpointType::Community,
&data.name,
&context.settings().get_protocol_and_hostname(),
)?;
let community_dupe =
Community::read_from_apub_id(&mut context.pool(), &community_actor_id).await?;
if community_dupe.is_some() {
Err(LemmyErrorType::CommunityAlreadyExists)?
}
// When you create a community, make sure the user becomes a moderator and a follower
let keypair = generate_actor_keypair()?;
let community_form = CommunityInsertForm::builder()
.name(data.name.clone())
.title(data.title.clone())
.description(data.description.clone())
.icon(icon)
.banner(banner)
.nsfw(data.nsfw)
.actor_id(Some(community_actor_id.clone()))
.private_key(Some(keypair.private_key))
.public_key(keypair.public_key)
.followers_url(Some(generate_followers_url(&community_actor_id)?))
.inbox_url(Some(generate_inbox_url(&community_actor_id)?))
.shared_inbox_url(Some(generate_shared_inbox_url(context.settings())?))
.posting_restricted_to_mods(data.posting_restricted_to_mods)
.instance_id(site_view.site.instance_id)
.build();
let inserted_community = Community::create(&mut context.pool(), &community_form)
.await
.with_lemmy_type(LemmyErrorType::CommunityAlreadyExists)?;
// The community creator becomes a moderator
let community_moderator_form = CommunityModeratorForm {
community_id: inserted_community.id,
person_id: local_user_view.person.id,
};
CommunityModerator::join(&mut context.pool(), &community_moderator_form)
.await
.with_lemmy_type(LemmyErrorType::CommunityModeratorAlreadyExists)?;
// Follow your own community
let community_follower_form = CommunityFollowerForm {
community_id: inserted_community.id,
person_id: local_user_view.person.id,
pending: false,
};
CommunityFollower::follow(&mut context.pool(), &community_follower_form)
.await
.with_lemmy_type(LemmyErrorType::CommunityFollowerAlreadyExists)?;
// Update the discussion_languages if that's provided
let community_id = inserted_community.id;
if let Some(languages) = data.discussion_languages.clone() {
let site_languages = SiteLanguage::read_local_raw(&mut context.pool()).await?;
// check that community languages are a subset of site languages
// https://stackoverflow.com/a/64227550
let is_subset = languages.iter().all(|item| site_languages.contains(item));
if !is_subset {
Err(LemmyErrorType::LanguageNotAllowed)?
}
CommunityLanguage::update(&mut context.pool(), languages, community_id).await?;
}
build_community_response(&context, local_user_view, community_id).await
}