v2 file.ts

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  import {
  LambdaApiFunction,
  handleResourceApi
} from './_base';
 
import {
  api404Body, generateApi400Body
} from '@/types/api/_shared';
import {
  FullFileObject, GetFileApi, getFileApiParamsValidator
} from '@/types/api/files';
import {
  TABLE_FILE, typedGet
} from '@/utils/backend/dynamoTyped';
import { validateObject } from '@/utils/backend/validation';
import { getLogger } from '@/utils/common/logger';
 
const logger = getLogger('file');
 
const dtrIdRegex = /^(\d+)-(\d+)$/;
 
const GET: LambdaApiFunction<GetFileApi> = async function (event) {
  logger.debug('GET', ...arguments);
 
  // Validate the parameters
  const [
    params,
    paramsErrors,
  ] = validateObject<GetFileApi['params']>(
    event.pathParameters,
    getFileApiParamsValidator
  );
  if (
    params === null ||
    paramsErrors.length > 0
  ) {
    return [
      400,
      generateApi400Body(paramsErrors),
    ];
  }
 
  const idParts = params.id.match(dtrIdRegex);
  if (idParts === null) {
    return [
      404,
      api404Body,
    ];
  }
 
  const file = await typedGet<FullFileObject>({
    TableName: TABLE_FILE,
    Key: {
      Talkgroup: Number(idParts[1]),
      Added: Number(idParts[2]),
    },
  });
 
  if (!file.Item) {
    return [
      404,
      api404Body,
    ];
  }
 
  return [
    200,
    file.Item as GetFileApi['responses'][200],
  ];
};
 
export const main = handleResourceApi.bind(null, {
  GET,
});