Implement leave organization (accessed from the bottom of the user's settings page)

src/api/core/mod.rs

@@ -65,6 +65,7 @@ pub fn routes() -> Vec<Route> {
         get_organization,
         create_organization,
         delete_organization,
+        leave_organization,
         get_user_collections,
         get_org_collections,
         get_org_collection_detail,

src/api/core/organizations.rs

@@ -73,6 +73,29 @@ fn delete_organization(org_id: String, data: JsonUpcase<PasswordData>, headers:
     }
 }
 
+#[post("/organizations/<org_id>/leave")]
+fn leave_organization(org_id: String, headers: Headers, conn: DbConn) -> EmptyResult {
+    match UserOrganization::find_by_user_and_org(&headers.user.uuid, &org_id, &conn) {
+        None => err!("User not part of organization"),
+        Some(user_org) => {
+            if user_org.type_ == UserOrgType::Owner as i32 {
+                let num_owners = UserOrganization::find_by_org_and_type(
+                    &org_id, UserOrgType::Owner as i32, &conn)
+                    .len();
+
+                if num_owners <= 1 {
+                    err!("The last owner can't leave")
+                }
+            }
+            
+            match user_org.delete(&conn) {
+                Ok(()) => Ok(()),
+                Err(_) => err!("Failed leaving the organization")
+            }
+        }
+    }
+}
+
 #[get("/organizations/<org_id>")]
 fn get_organization(org_id: String, _headers: OwnerHeaders, conn: DbConn) -> JsonResult {
     match Organization::find_by_uuid(&org_id, &conn) {