koa-mongo-crud/src/crud/controller.js

Base API for CRUD using koa and mongo

const Status = require('http-status');
const ValidationException = require('./validation-exception');
const DuplicationException = require('./duplication-exception');

exports.list = (mapper) => async (ctx) => {
  const result = await mapper.list(ctx.request.query);
  ctx.body = mapper.toHalCollection(result, ctx);
  ctx.status = 200;
};

exports.create = (mapper) => async (ctx) => {
  try {
    const result = await mapper.create(ctx.request.body);
    ctx.body = mapper.toHal(result, ctx.router);
    ctx.status = Status.CREATED;
  } catch (e) {
    if (e instanceof ValidationException) {
      ctx.throw(Status.UNPROCESSABLE_ENTITY, { message: e.errors });
      return;
    } if (e instanceof DuplicationException) {
      ctx.throw(Status.CONFLICT, { message: `There is an entity with this ${e.errors}` });
      return;
    }
    throw e;
  }
};

exports.detail = (mapper) => async (ctx) => {
  const result = await mapper.detail(ctx.params.id, ctx.query.deleted || ctx.query.disabled);
  if (result === null) {
    ctx.throw(Status.NOT_FOUND, 'Entity not found');
  }
  ctx.body = mapper.toHal(result, ctx.router);
  ctx.status = Status.OK;
};

exports.delete = (mapper) => async (ctx) => {
  const result = await mapper.delete(ctx.params.id);
  if (result === null || result.n === 0) {
    ctx.throw(Status.NOT_FOUND, 'Entity not found');
  }
  ctx.status = Status.NO_CONTENT;
  ctx.body = null;
};

exports.remove = (mapper) => async (ctx) => {
  const result = await mapper.remove(ctx.params.id);
  if (result === null || result.n === 0) {
    ctx.throw(Status.NOT_FOUND, 'Entity not found');
  }
  ctx.status = Status.NO_CONTENT;
  ctx.body = null;
};

exports.update = (mapper) => async (ctx) => {
  try {
    const result = await mapper.update(ctx.params.id, ctx.request.body, ctx.query.deleted || ctx.query.disabled);
    if (result === null) {
      ctx.throw(Status.NOT_FOUND, 'Entity not found');
      return;
    }
    ctx.body = mapper.toHal(result, ctx.router);
    ctx.status = Status.OK;
  } catch (e) {
    if (e instanceof ValidationException) {
      ctx.throw(Status.UNPROCESSABLE_ENTITY, { message: e.errors });
      return;
    } if (e instanceof DuplicationException) {
      ctx.throw(Status.CONFLICT, { message: `There is an entity with this ${e.errors}` });
      return;
    }
    throw e;
  }
};