lemmy/crates/db_views/src/private_message_view.rs

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use crate::structs::PrivateMessageView;
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use diesel::{pg::Pg, result::Error, *};
use lemmy_db_schema::{
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newtypes::{PersonId, PrivateMessageId},
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schema::{person, person_alias_1, private_message},
source::{
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person::{Person, PersonAlias1, PersonSafe, PersonSafeAlias1},
private_message::PrivateMessage,
},
traits::{ToSafe, ViewToVec},
utils::limit_and_offset,
};
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use tracing::debug;
use typed_builder::TypedBuilder;
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type PrivateMessageViewTuple = (PrivateMessage, PersonSafe, PersonSafeAlias1);
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impl PrivateMessageView {
pub fn read(conn: &PgConnection, private_message_id: PrivateMessageId) -> Result<Self, Error> {
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let (private_message, creator, recipient) = private_message::table
.find(private_message_id)
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.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)))
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.order_by(private_message::published.desc())
.select((
private_message::all_columns,
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Person::safe_columns_tuple(),
PersonAlias1::safe_columns_tuple(),
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))
.first::<PrivateMessageViewTuple>(conn)?;
Ok(PrivateMessageView {
private_message,
creator,
recipient,
})
}
/// Gets the number of unread messages
pub fn get_unread_messages(conn: &PgConnection, my_person_id: PersonId) -> Result<i64, Error> {
use diesel::dsl::*;
private_message::table
.filter(private_message::read.eq(false))
.filter(private_message::recipient_id.eq(my_person_id))
.filter(private_message::deleted.eq(false))
.select(count(private_message::id))
.first::<i64>(conn)
}
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}
#[derive(TypedBuilder)]
#[builder(field_defaults(default))]
pub struct PrivateMessageQuery<'a> {
#[builder(!default)]
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conn: &'a PgConnection,
#[builder(!default)]
recipient_id: PersonId,
unread_only: Option<bool>,
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page: Option<i64>,
limit: Option<i64>,
}
impl<'a> PrivateMessageQuery<'a> {
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pub fn list(self) -> Result<Vec<PrivateMessageView>, Error> {
let mut query = private_message::table
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.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)))
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.select((
private_message::all_columns,
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Person::safe_columns_tuple(),
PersonAlias1::safe_columns_tuple(),
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))
.into_boxed();
// If its unread, I only want the ones to me
if self.unread_only.unwrap_or(false) {
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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)?;
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query = query
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.filter(private_message::deleted.eq(false))
.limit(limit)
.offset(offset)
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.order_by(private_message::published.desc());
debug!(
"Private Message View Query: {:?}",
debug_query::<Pg, _>(&query)
);
let res = query.load::<PrivateMessageViewTuple>(self.conn)?;
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Ok(PrivateMessageView::from_tuple_to_vec(res))
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}
}
impl ViewToVec for PrivateMessageView {
type DbTuple = PrivateMessageViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
items
.into_iter()
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.map(|a| Self {
private_message: a.0,
creator: a.1,
recipient: a.2,
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})
.collect::<Vec<Self>>()
}
}