Allow to add real guests

src/model/tripdetails.rs

@@ -1,3 +1,4 @@
+use crate::model::user::User;
 use chrono::NaiveDate;
 use rocket::FromForm;
 use serde::{Deserialize, Serialize};
@@ -89,6 +90,91 @@ ORDER BY day;",
             .map(|a| NaiveDate::parse_from_str(&a, "%Y-%m-%d").unwrap())
             .collect()
     }
+    pub(crate) async fn user_is_rower(&self, db: &SqlitePool, user: &User) -> bool {
+        //check if cox if planned_event
+        let is_rower = sqlx::query!(
+            "SELECT count(*) as amount
+            FROM user_trip 
+            WHERE trip_details_id = ? AND user_id = ?",
+            self.id,
+            user.id
+        )
+        .fetch_one(db)
+        .await
+        .unwrap();
+        is_rower.amount > 0
+    }
+
+    async fn belongs_to_event(&self, db: &SqlitePool) -> bool {
+        let amount = sqlx::query!(
+            "SELECT count(*) as amount
+            FROM planned_event
+            WHERE trip_details_id = ?",
+            self.id,
+        )
+        .fetch_one(db)
+        .await
+        .unwrap();
+        amount.amount > 0
+    }
+
+    pub(crate) async fn user_allowed_to_change(&self, db: &SqlitePool, user: &User) -> bool {
+        if self.belongs_to_event(db).await {
+            return user.is_admin;
+        } else {
+            return self.user_is_cox(db, user).await != CoxAtTrip::No;
+        }
+    }
+
+    pub(crate) async fn user_is_cox(&self, db: &SqlitePool, user: &User) -> CoxAtTrip {
+        //check if cox if planned_event
+        let is_cox = sqlx::query!(
+            "SELECT count(*) as amount
+            FROM trip 
+            WHERE planned_event_id = (
+                SELECT id FROM planned_event WHERE trip_details_id = ?
+            ) 
+            AND cox_id = ?",
+            self.id,
+            user.id
+        )
+        .fetch_one(db)
+        .await
+        .unwrap();
+        if is_cox.amount > 0 {
+            return CoxAtTrip::Yes(Action::Helping);
+        }
+
+        //check if cox if own event
+        let is_cox = sqlx::query!(
+            "SELECT count(*) as amount
+            FROM trip 
+            WHERE trip_details_id = ? 
+            AND cox_id = ?",
+            self.id,
+            user.id
+        )
+        .fetch_one(db)
+        .await
+        .unwrap();
+        if is_cox.amount > 0 {
+            return CoxAtTrip::Yes(Action::Own);
+        }
+
+        CoxAtTrip::No
+    }
+}
+
+#[derive(PartialEq, Debug)]
+pub(crate) enum CoxAtTrip {
+    No,
+    Yes(Action),
+}
+
+#[derive(PartialEq, Debug)]
+pub(crate) enum Action {
+    Helping,
+    Own,
 }
 
 #[cfg(test)]