ff-admin-server/src/views/memberView.ts

import { DataSource, ViewColumn, ViewEntity } from "typeorm";
import { member } from "../entity/club/member/member";
import { DB_TYPE } from "../env.defaults";

let todayAge: string;
let ageThisYear: string;
let exactAge: string;
if (DB_TYPE == "postgres") {
  todayAge = `DATE_PART('year', AGE(CURRENT_DATE, member.birthdate))`;
  ageThisYear = `EXTRACT(YEAR FROM CURRENT_DATE) - EXTRACT(YEAR FROM member.birthdate)`;
  exactAge = `AGE(CURRENT_DATE, member.birthdate)`;
} else if (DB_TYPE == "mysql") {
  todayAge = `TIMESTAMPDIFF(YEAR, member.birthdate, CURDATE()) AS todayAge`;
  ageThisYear = `YEAR(CURDATE()) - YEAR(member.birthdate) AS ageThisYear`;
  exactAge = `
    CONCAT(
      TIMESTAMPDIFF(YEAR, member.birthdate, CURDATE()), ' years ',
      TIMESTAMPDIFF(MONTH, member.birthdate, CURDATE()) % 12, ' months ',
      TIMESTAMPDIFF(DAY, 
          DATE_ADD(
              member.birthdate, 
              INTERVAL TIMESTAMPDIFF(MONTH, member.birthdate, CURDATE()) MONTH
          ),
          CURDATE()
      ), ' days'
    )
  `;
} else if (DB_TYPE == "sqlite") {
  todayAge = `(strftime('%Y', 'now') - strftime('%Y', member.birthdate) - (strftime('%m-%d', 'now') < strftime('%m-%d', member.birthdate)))`;
  ageThisYear = `strftime('%Y', 'now') - strftime('%Y', member.birthdate)`;
  exactAge = `
    (strftime('%Y', 'now') - strftime('%Y', member.birthdate)) || ' years ' ||
    (strftime('%m', 'now') - strftime('%m', member.birthdate)) || ' months ' ||
    (strftime('%d', 'now') - strftime('%d', member.birthdate)) || ' days'
  `;
}

@ViewEntity({
  expression: (datasource: DataSource) =>
    datasource
      .getRepository(member)
      .createQueryBuilder("member")
      .select("member.id", "id")
      .select("member.internalId", "internalId")
      .addSelect("member.firstname", "firstname")
      .addSelect("member.lastname", "lastname")
      .addSelect("member.nameaffix", "nameaffix")
      .addSelect("member.birthdate", "birthdate")
      .addSelect("salutation.salutation", "salutation")
      .addSelect(todayAge, "todayAge")
      .addSelect(ageThisYear, "ageThisYear")
      .addSelect(exactAge, "exactAge")
      .leftJoin("member.salutation", "salutation"),
})
export class memberView {
  @ViewColumn()
  id: string;

  @ViewColumn()
  salutation: string;

  @ViewColumn()
  internalId: string;

  @ViewColumn()
  firstname: string;

  @ViewColumn()
  lastname: string;

  @ViewColumn()
  nameaffix: string;

  @ViewColumn()
  birthdate: Date;

  @ViewColumn()
  todayAge: number;

  @ViewColumn()
  ageThisYear: number;

  @ViewColumn()
  exactAge: string;
}