QMK Shift swap

bool process_record_user(uint16_t keycode, keyrecord_t *record) {
    switch(keycode) {
        case KC_LBRC:  //if keycode is [
        case KC_RBRC:  //or keycode is ]
            if (record->event.pressed) {  //if this is a keydown event
                if (get_mods() & MOD_MASK_SHIFT) {   //if a shift key is held
                    uint8_t temp_mods = get_mods();  //store the current mods that are held
                    del_mods(MOD_MASK_SHIFT);        //ignore both shift keys
                    tap_code(keycode);               //tap the key without shift, types a  [  or  ]
                    set_mods(temp_mods);             //add back shift key(s)
                } else {                        //if shift is not held
                    tap_code16(LSFT(keycode));  //tap the key with shift, types a  {  or  }
                }
            }
            return false;  //do not process the key as normal

        case MACRO1:  //other macro code
            //...
            break;
    }
    return true;
}