add: temporary CORS headers

add: better sql calls with JOIN

models/relay.c

@@ -60,11 +60,21 @@ relay_db_select_mapper(sqlite3_stmt *stmt)
                 break;
         }
     }
+
+    schedule_t **schedules = schedule_get_relay_weekdays(new_relay->id);
     for(int i = 0; i < 7; ++i)
     {
-        int schedule_id = junction_relay_schedule_get_schedule_id(i, new_relay->id);
-        new_relay->schedules[i] = schedule_get_by_id_or_off(schedule_id);
+        if(schedules[i] == NULL)
+        {
+            LOG_ERROR("got only %d/7 schedules for relay_id %d\n", i, new_relay->id);
+            relay_free(new_relay);
+            free(schedules);
+            return NULL;
+        }
+        new_relay->schedules[i] = schedules[i];
     }
+    free(schedules); // don't free list, because contents are kept in relay->schedules
+
     relay_reload_active_schedule(new_relay);
 
     return new_relay;
@@ -324,6 +334,17 @@ relay_get_all()
     return relay_db_select(stmt);
 }
 
+relay_t**
+relay_get_with_schedule(int schedule_id)
+{
+    sqlite3_stmt *stmt;
+
+    sqlite3_prepare_v2(global_database, "SELECT DISTINCT relays.* FROM relays INNER JOIN junction_relay_schedule ON relays.id == junction_relay_schedule.relay_id WHERE junction_relay_schedule.schedule_id = ?1;", -1, &stmt, NULL);
+    sqlite3_bind_int(stmt, 1, schedule_id);
+
+    return relay_db_select(stmt);
+}
+
 relay_t*
 relay_get_for_controller(int controller_id, int relay_num)
 {

models/schedule.c

@@ -391,6 +391,17 @@ schedule_get_by_uid(uuid_t uid)
     return result;
 }
 
+schedule_t**
+schedule_get_relay_weekdays(int relay_id)
+{
+    sqlite3_stmt *stmt;
+
+    sqlite3_prepare_v2(global_database, "SELECT schedules.* FROM schedules INNER JOIN junction_relay_schedule ON schedules.id == junction_relay_schedule.schedule_id WHERE junction_relay_schedule.relay_id = ?1 ORDER BY junction_relay_schedule.weekday ASC", -1, &stmt, NULL);
+    sqlite3_bind_int(stmt, 1, relay_id);
+
+    return schedule_db_select(stmt);
+}
+
 schedule_t**
 schedule_get_all()
 {