use diesel::{pg::Pg, result::Error, *}; use lemmy_db_queries::{limit_and_offset, MaybeOptional, ToSafe, ViewToVec}; use lemmy_db_schema::{ schema::{person, person_alias_1, private_message}, source::{ person::{Person, PersonAlias1, PersonSafe, PersonSafeAlias1}, private_message::PrivateMessage, }, PersonId, PrivateMessageId, }; use log::debug; use serde::Serialize; #[derive(Debug, PartialEq, Serialize, Clone)] pub struct PrivateMessageView { pub private_message: PrivateMessage, pub creator: PersonSafe, pub recipient: PersonSafeAlias1, } type PrivateMessageViewTuple = (PrivateMessage, PersonSafe, PersonSafeAlias1); impl PrivateMessageView { pub fn read(conn: &PgConnection, private_message_id: PrivateMessageId) -> Result { let (private_message, creator, recipient) = private_message::table .find(private_message_id) .inner_join(person::table.on(private_message::creator_id.eq(person::id))) .inner_join(person_alias_1::table.on(private_message::recipient_id.eq(person_alias_1::id))) .order_by(private_message::published.desc()) .select(( private_message::all_columns, Person::safe_columns_tuple(), PersonAlias1::safe_columns_tuple(), )) .first::(conn)?; Ok(PrivateMessageView { private_message, creator, recipient, }) } } pub struct PrivateMessageQueryBuilder<'a> { conn: &'a PgConnection, recipient_id: PersonId, unread_only: bool, page: Option, limit: Option, } impl<'a> PrivateMessageQueryBuilder<'a> { pub fn create(conn: &'a PgConnection, recipient_id: PersonId) -> Self { PrivateMessageQueryBuilder { conn, recipient_id, unread_only: false, page: None, limit: None, } } pub fn unread_only(mut self, unread_only: bool) -> Self { self.unread_only = unread_only; self } pub fn page>(mut self, page: T) -> Self { self.page = page.get_optional(); self } pub fn limit>(mut self, limit: T) -> Self { self.limit = limit.get_optional(); self } pub fn list(self) -> Result, Error> { let mut query = private_message::table .inner_join(person::table.on(private_message::creator_id.eq(person::id))) .inner_join(person_alias_1::table.on(private_message::recipient_id.eq(person_alias_1::id))) .select(( private_message::all_columns, Person::safe_columns_tuple(), PersonAlias1::safe_columns_tuple(), )) .into_boxed(); // If its unread, I only want the ones to me if self.unread_only { query = query .filter(private_message::read.eq(false)) .filter(private_message::recipient_id.eq(self.recipient_id)); } // Otherwise, I want the ALL view to show both sent and received else { query = query.filter( private_message::recipient_id .eq(self.recipient_id) .or(private_message::creator_id.eq(self.recipient_id)), ) } let (limit, offset) = limit_and_offset(self.page, self.limit); query = query .filter(private_message::deleted.eq(false)) .limit(limit) .offset(offset) .order_by(private_message::published.desc()); debug!( "Private Message View Query: {:?}", debug_query::(&query) ); let res = query.load::(self.conn)?; Ok(PrivateMessageView::from_tuple_to_vec(res)) } } impl ViewToVec for PrivateMessageView { type DbTuple = PrivateMessageViewTuple; fn from_tuple_to_vec(items: Vec) -> Vec { items .iter() .map(|a| Self { private_message: a.0.to_owned(), creator: a.1.to_owned(), recipient: a.2.to_owned(), }) .collect::>() } }