src/stores/forums.js


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import { ApolloError } from '@apollo/client/core';
import { readable } from 'svelte/store';
import { client } from '$config/apollo';
import { GET_FORUMS } from '$data/queries';

const internals = {

  // The exported data structure

  initialValue: {
    loading: true,
    data: [],
    error: undefined
  }
};

export const forums = readable(internals.initialValue, (set) => {

  client.watchQuery({ query: GET_FORUMS }).subscribe((result) => {

    if (result.errors) {
      const error = new ApolloError({ graphQLErrors: result.errors });
      return set({
        loading: false,
        data: [],
        error
      });
    }

    set({
      loading: false,
      data: result.data.forums,
      error: undefined
    });
  });
});