Get the ID of a group included in a request

src/helpers/database.rs

@@ -143,6 +143,11 @@ impl QueryInfo {
         self
     }
 
+    pub fn cond_group_id(mut self, key: &str, val: &GroupID) -> QueryInfo {
+        self.conditions.insert(key.to_string(), val.id().to_string());
+        self
+    }
+
     pub fn cond_legacy_bool(mut self, key: &str, val: bool) -> QueryInfo {
         let val = match val {
             true => "1".to_string(),

src/helpers/groups_helper.rs

@@ -81,6 +81,14 @@ pub fn get_list_user(user_id: UserID, only_followed: bool) -> ResultBoxError<Vec
     query.exec(|row| row.get_group_id("groups_id"))
 }
 
+/// Check out whether a group exists or not
+pub fn exists(group_id: &GroupID) -> ResultBoxError<bool> {
+    database::QueryInfo::new(GROUPS_LIST_TABLE)
+        .cond_group_id("id", group_id)
+        .exec_count()
+        .map(|m| m > 0)
+}
+
 /// Find a group id by virtual directory
 pub fn find_by_virtual_directory(dir: &str) -> ResultBoxError<GroupID> {
     database::QueryInfo::new(GROUPS_LIST_TABLE)