All files / src/common_services/appsync appsyncUtils.ts

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import { Injectable } from '@nestjs/common';
import { DocumentClient } from 'aws-sdk/clients/dynamodb';
 
@Injectable()
export class AppSyncUtils {
  getGqlResponseKeys = (
    keys: DocumentClient.AttributeMap,
  ): string[] => {
    const gqlKeys: string[] = [];
    Object.keys(keys).forEach((key) => {
      const value = keys[key];
      if (Array.isArray(value)) {
        const keyValues = this.getGqlResponseKeys(value[0]);
        gqlKeys.push(`${key} {${keyValues.join(' ')}}`);
      } else if (typeof value === 'object') {
        const keyValue = this.getGqlResponseKeys(value);
        gqlKeys.push(`${key} {${keyValue.join(' ')}}`);
      } else {
        gqlKeys.push(key);
      }
    });
    return gqlKeys;
  };
}