planka/server/api/controllers/tasks/update.js

const Errors = {
  NOT_ENOUGH_RIGHTS: {
    notEnoughRights: 'Not enough rights',
  },
  TASK_NOT_FOUND: {
    taskNotFound: 'Task not found',
  },
};

module.exports = {
  inputs: {
    id: {
      type: 'string',
      regex: /^[0-9]+$/,
      required: true,
    },
    position: {
      type: 'number',
    },
    name: {
      type: 'string',
      isNotEmptyString: true,
    },
    isCompleted: {
      type: 'boolean',
    },
  },

  exits: {
    notEnoughRights: {
      responseType: 'forbidden',
    },
    taskNotFound: {
      responseType: 'notFound',
    },
  },

  async fn(inputs) {
    const { currentUser } = this.req;

    const path = await sails.helpers.tasks
      .getProjectPath(inputs.id)
      .intercept('pathNotFound', () => Errors.TASK_NOT_FOUND);

    let { task } = path;
    const { board } = path;

    const boardMembership = await BoardMembership.findOne({
      boardId: board.id,
      userId: currentUser.id,
    });

    if (!boardMembership) {
      throw Errors.TASK_NOT_FOUND; // Forbidden
    }

    if (boardMembership.role !== BoardMembership.Roles.EDITOR) {
      throw Errors.NOT_ENOUGH_RIGHTS;
    }

    const values = _.pick(inputs, ['position', 'name', 'isCompleted']);

    task = await sails.helpers.tasks.updateOne.with({
      values,
      board,
      record: task,
      request: this.req,
    });

    if (!task) {
      throw Errors.TASK_NOT_FOUND;
    }

    return {
      item: task,
    };
  },
};