Add endpoint to fetch screenings from the database.

Not entirely happy about the way this turned out for now. A more ergonomic
return type from the models::screenings::get_all() function will be
investigated.

1 files changed, 77 insertions, 0 deletions

diff --git a/src/models/screening.rs b/src/models/screening.rs
new file mode 100644
index 0000000..cd08e88
--- /dev/null
+++ b/src/models/screening.rs
@@ -0,0 +1,77 @@
+/*
+    Social program for Ramaskrik.
+    Copyright (C) 2019  Harald Eilertsen <haraldei@anduin.net>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+use crate::{
+    db::Connection,
+    models::{film::Film, room::Room},
+    schema::*,
+};
+use diesel::prelude::*;
+use serde_derive::{Deserialize, Serialize};
+
+joinable!(screenings -> rooms (room_id));
+joinable!(screenings -> films (film_id));
+
+#[derive(Deserialize, Identifiable, PartialEq, Serialize, Queryable)]
+pub struct Screening {
+    pub id: i32,
+    pub film_id: i32,
+    pub room_id: i32,
+    pub date: chrono::NaiveDate,
+    pub start_time: chrono::NaiveTime,
+    pub end_time: chrono::NaiveTime,
+}
+
+#[derive(Deserialize, Insertable)]
+#[table_name = "screenings"]
+pub struct NewScreening {
+    pub film_id: i32,
+    pub room_id: i32,
+    pub date: chrono::NaiveDate,
+    pub start_time: chrono::NaiveTime,
+    pub end_time: chrono::NaiveTime,
+}
+
+pub fn get_all(db: &Connection) -> QueryResult<Vec<(Screening, Option<Film>, Option<Room>)>> {
+    use crate::schema::screenings::dsl::*;
+    screenings
+        .left_join(films::table)
+        .left_join(rooms::table)
+        .get_results::<(Screening, Option<Film>, Option<Room>)>(&**db)
+}
+
+pub fn create(
+    room: &Room,
+    film: &Film,
+    date: chrono::NaiveDate,
+    start_time: chrono::NaiveTime,
+    end_time: chrono::NaiveTime,
+    db: &Connection) -> QueryResult<usize>
+{
+    let s = NewScreening {
+        room_id: room.id,
+        film_id: film.id,
+        date: date,
+        start_time: start_time,
+        end_time: end_time,
+    };
+
+    diesel::insert_into(screenings::table)
+        .values(&s)
+        .execute(&**db)
+}