Add an accommodations reservations module (#188)

Add a new module to enable accommodations reservation

![](https://gitea.communiquons.org/attachments/de1f5b12-0a93-40f8-b29d-97665daa6fd5)

Reviewed-on: #188

geneit_backend/src/constants.rs

@@ -60,6 +60,10 @@ pub struct StaticConstraints {
     pub member_country: SizeConstraint,
     pub member_sex: SizeConstraint,
     pub member_note: SizeConstraint,
+
+    pub accommodation_name_len: SizeConstraint,
+    pub accommodation_description_len: SizeConstraint,
+    pub accommodation_calendar_name_len: SizeConstraint,
 }
 
 impl Default for StaticConstraints {
@@ -91,6 +95,10 @@ impl Default for StaticConstraints {
             member_country: SizeConstraint::new(0, 2),
             member_sex: SizeConstraint::new(0, 1),
             member_note: SizeConstraint::new(0, 35000),
+
+            accommodation_name_len: SizeConstraint::new(1, 50),
+            accommodation_description_len: SizeConstraint::new(0, 500),
+            accommodation_calendar_name_len: SizeConstraint::new(2, 50),
         }
     }
 }
@@ -134,3 +142,10 @@ pub const THUMB_WIDTH: u32 = 350;
 
 /// Thumbnail height
 pub const THUMB_HEIGHT: u32 = 350;
+
+/// Accommodations reservations calendars tokens len
+pub const ACCOMMODATIONS_RESERVATIONS_CALENDARS_TOKENS_LEN: usize = 50;
+
+/// Minimum interval before calendar used time update
+pub const ACCOMMODATIONS_RESERVATIONS_CAL_URL_TIME_USED_UPDATE_MIN_INTERVAL: Duration =
+    Duration::from_secs(60);