gistfile1.txt

'use strict';

/**
 * Read the documentation (https://strapi.io/documentation/v3.x/concepts/controllers.html#core-controllers)
 * to customize this controller
 */

module.exports = {
  likeOne: async (ctx, next) => {
    let user = ctx.state.user;

    if (!user) {
      return ctx.badRequest(null, [{ messages: [{ id: 'No authorization header was found' }] }]);
    }

    const { id, town } = ctx.params;

    const currentPoll = await strapi.query('polls').findOne({ id: id });

    let updatedUsers = currentPoll.users.map(function(item) {
      return item.id;
    });

    if (updatedUsers.indexOf( user.id ) != -1) {
      return ctx.badRequest(null, [{ messages: [{ id: 'Like already exists' }] }]);
    }

    updatedUsers.push(user.id);

    await strapi.query('polls').update({ id: id }, {
      users: updatedUsers,
    });

    ctx.response.status = 200;
    ctx.body = 'poll: ' + id + ' liked';
  }
};