Implemented data model, database schema and database connection pool.

src/backend/data.rs

@@ -0,0 +1,82 @@
+use chrono::{NaiveDate, NaiveTime, Weekday};
+use rust_decimal::Decimal;
+use uuid::Uuid;
+
+pub struct Company {
+    id: u16,
+    name: String,
+    street: String,
+    house_number: String,
+    zip_code: String,
+    city: String,
+}
+
+pub struct User {
+    id: u16,
+    login: String,
+    password: String,
+    full_name: String,
+    email: String,
+    admin: bool,
+    get_emails: bool,
+}
+
+pub struct Property {
+    id: u16,
+    name: String,
+    description: String,
+    price: Decimal
+}
+
+pub enum MessageType {
+    NewReservation,
+    NewReservationCust,
+    ReservationApp,
+    ReservationCanceled,
+}
+
+pub struct Message {
+    id: u16,
+    msg_type: MessageType,
+    subject: String,
+    text: String,
+}
+
+pub struct OpeningHour {
+    id: u16,
+    day: Weekday,
+    from: NaiveTime,
+    to: NaiveTime,
+    discount: u8
+}
+
+pub struct Customer {
+    id: u128,
+    full_name: String,
+    email: String,
+    phone: String,
+    discount: u8
+}
+
+pub enum ReservationState {
+    New,
+    Approved,
+    Canceled,
+}
+
+pub struct Reservation {
+    id: u128,
+    from: NaiveTime,
+    to: NaiveTime,
+    property: Property,
+}
+
+pub struct ReservationSum {
+    id: u128,
+    uuid: Uuid,
+    date: NaiveDate,
+    items: Vec<Reservation>,
+    customer: Customer,
+    price: Decimal,
+    state: ReservationState,
+}

src/backend/mod.rs

@@ -0,0 +1,26 @@
+use cfg_if::cfg_if;
+
+pub mod data;
+
+cfg_if!{
+    if #[cfg(feature = "ssr")] {
+        use sqlx::PgPool;
+
+        #[derive(Clone)]
+        pub struct AppData {
+            db_pool: PgPool
+        }
+
+        impl AppData {
+            pub fn new(db_pool: PgPool) -> Self {
+                Self {
+                    db_pool
+                }
+            }
+
+            pub fn db_pool(&self) -> &PgPool {
+                &self.db_pool
+            }
+        }
+    }
+}