lemmy/lemmy_db_views/src/private_message_view.rs

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use crate::ViewToVec;
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use diesel::{result::Error, *};
use lemmy_db::{limit_and_offset, MaybeOptional, ToSafe};
use lemmy_db_schema::{
schema::{private_message, user_, user_alias_1},
source::{
private_message::PrivateMessage,
user::{UserAlias1, UserSafe, UserSafeAlias1, User_},
},
};
2020-12-16 22:16:48 +00:00
use serde::Serialize;
#[derive(Debug, PartialEq, Serialize, Clone)]
pub struct PrivateMessageView {
pub private_message: PrivateMessage,
pub creator: UserSafe,
pub recipient: UserSafeAlias1,
}
type PrivateMessageViewTuple = (PrivateMessage, UserSafe, UserSafeAlias1);
impl PrivateMessageView {
pub fn read(conn: &PgConnection, private_message_id: i32) -> Result<Self, Error> {
let (private_message, creator, recipient) = private_message::table
.find(private_message_id)
.inner_join(user_::table.on(private_message::creator_id.eq(user_::id)))
.inner_join(user_alias_1::table.on(private_message::recipient_id.eq(user_alias_1::id)))
.order_by(private_message::published.desc())
.select((
private_message::all_columns,
User_::safe_columns_tuple(),
UserAlias1::safe_columns_tuple(),
))
.first::<PrivateMessageViewTuple>(conn)?;
Ok(PrivateMessageView {
private_message,
creator,
recipient,
})
}
}
pub struct PrivateMessageQueryBuilder<'a> {
conn: &'a PgConnection,
recipient_id: i32,
unread_only: bool,
page: Option<i64>,
limit: Option<i64>,
}
impl<'a> PrivateMessageQueryBuilder<'a> {
pub fn create(conn: &'a PgConnection, recipient_id: i32) -> 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<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
self.page = page.get_optional();
self
}
pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
self.limit = limit.get_optional();
self
}
pub fn list(self) -> Result<Vec<PrivateMessageView>, Error> {
let mut query = private_message::table
.inner_join(user_::table.on(private_message::creator_id.eq(user_::id)))
.inner_join(user_alias_1::table.on(private_message::recipient_id.eq(user_alias_1::id)))
.select((
private_message::all_columns,
User_::safe_columns_tuple(),
UserAlias1::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);
let res = query
.filter(private_message::deleted.eq(false))
.limit(limit)
.offset(offset)
.order_by(private_message::published.desc())
.load::<PrivateMessageViewTuple>(self.conn)?;
Ok(PrivateMessageView::to_vec(res))
}
}
impl ViewToVec for PrivateMessageView {
type DbTuple = PrivateMessageViewTuple;
fn to_vec(pm: Vec<Self::DbTuple>) -> Vec<Self> {
pm.iter()
.map(|a| Self {
private_message: a.0.to_owned(),
creator: a.1.to_owned(),
recipient: a.2.to_owned(),
})
.collect::<Vec<Self>>()
}
}