planka/server/api/helpers/delete-card-membership.js

module.exports = {
  inputs: {
    record: {
      type: 'ref',
      required: true
    },
    board: {
      type: 'ref',
      required: true
    },
    request: {
      type: 'ref'
    }
  },

  fn: async function(inputs, exits) {
    const cardMembership = await CardMembership.destroyOne(inputs.record.id);

    if (cardMembership) {
      sails.sockets.broadcast(
        `board:${inputs.board.id}`,
        'cardMembershipDelete',
        {
          item: cardMembership
        },
        inputs.request
      );

      const cardSubscription = await CardSubscription.destroyOne({
        cardId: cardMembership.cardId,
        userId: cardMembership.userId,
        isPermanent: false
      });

      if (cardSubscription) {
        sails.sockets.broadcast(`user:${cardMembership.userId}`, 'cardUpdate', {
          item: {
            id: cardMembership.cardId,
            isSubscribed: false
          }
        });
      }
    }

    return exits.success(cardMembership);
  }
};