import { IConstruct } from "constructs";

function findEventSource(c: IConstruct): IConstruct | undefined {
  if (c.cfnResourceType === "AWS::Lambda::EventSourceMapping") {
    return c;
  }

  for (const child of c.node.children) {
    const found = findEventSource(child);
    if (found) {
      return found;
    }
  }
}

const eventSource = findEventSource(table);
eventSource?.addPropertyOverride("FilterCriteria", {
  Filters: [
    {
      Pattern: `{ \"eventName\": [\"INSERT\"], \"dynamodb\": { \"NewImage\": {\"channel\": { \"S\" : [\"email\"]}} } }`,
    },
  ],
});