Can delete a single notification

src/helpers/database.rs

@@ -660,6 +660,12 @@ impl DeleteQuery {
         }
     }
 
+    /// Add batch conditions
+    pub fn add_conditions(mut self, conditions: HashMap<String, mysql::Value>) -> Self {
+        self.conditions.extend(conditions.into_iter());
+        self
+    }
+
     /// Add a string condition
     pub fn cond_str(mut self, key: &str, value: &str) -> DeleteQuery {
         self.conditions.insert(key.to_string(), Value::from(value));

src/helpers/notifications_helper.rs

@@ -10,7 +10,31 @@ use crate::data::notification::{NotifElemType, NotifEventType, NotifEventVisibil
 use crate::data::user::UserID;
 use crate::helpers::database;
 
-/// check out whether a similar notification exists for given specifications
+/// Delete notifications
+pub fn delete(notification: &PartialNotification) -> ResultBoxError {
+
+    // Check if we have to delete a specific notification or a group of similar notifications
+    let conditions = match notification.id {
+        Some(id) => {
+            let mut map = HashMap::new();
+            map.insert("id".to_string(), mysql::Value::from(id));
+            map
+        }
+
+        // Delete similar notifications
+        None => {
+            notif_to_db(notification, false)
+        }
+    };
+
+
+    // Delete the notifications
+    database::DeleteQuery::new(NOTIFICATIONS_TABLE)
+        .add_conditions(conditions)
+        .exec()
+}
+
+/// Check out whether a similar notification exists for given specifications
 pub fn similar_exists(n: &PartialNotification) -> ResultBoxError<bool> {
     database::QueryInfo::new(NOTIFICATIONS_TABLE)
         .add_conditions(&notif_to_db(n, false))