const log = require('j7/log');
const bcutils = require('j7/bcutils');
const utils = require('j7/utils');

class NftTransferProcess extends BaseService {

  async start(conn, event) {
      const {err, row} = await conn.ormSelectOne(
        't_nft_transfer',
        [
          ['txhash', event['transactionHash']],
          ['log_index', event['logIndex']],
        ]
      );
      if (err) {
        log.error('processEvent:' + err);
        throw 'processEvent:' + err;
      }
      if (!row) {
        const returnValues = event['returnValues'];
        const {err} = await conn.insert(
          't_nft_transfer',
          [
            ['token_id', returnValues['tokenId']],
            ['txhash', event['transactionHash']],
            ['block_number', event['blockNumber']],
            ['log_index', event['logIndex']],
            ['_from', bcutils.toNormalAddress(returnValues['from'])],
            ['_to', bcutils.toNormalAddress(returnValues['to'])],
            ['raw_data', utils.jsonEncode(event)],
            ['createtime', utils.getUtcTime()],
            ['modifytime', utils.getUtcTime()],
          ]
        );
        if (err) {
          log.error('processEvent:' + err);
          throw 'processEvent:' + err;
        }
      }
  };

}

module.exports = NftTransferProcess;