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[rbdr/forum] / src / stores / apollo.js
1 import { ApolloError } from '@apollo/client/core';
2 import { readable } from 'svelte/store';
3 import { client } from '$config/apollo';
4
5 /*
6 * This is a generic store for use with apollo
7 */
8
9 export const store = function store({ key, query, initialValue = null, variables = {} }) {
10
11 return readable({
12 loading: true,
13 data: initialValue,
14 error: undefined
15 }, (set) => {
16
17 const handleError = function (error) {
18
19 return set({
20 loading: false,
21 data: initialValue,
22 error
23 });
24 };
25
26 client.watchQuery({ query, variables }).subscribe((result) => {
27
28 if (result.errors) {
29 const error = new ApolloError({ graphQLErrors: result.errors });
30 return handleError(error);
31 }
32
33 set({
34 loading: false,
35 data: result.data[key],
36 error: undefined
37 });
38 }, (error) => handleError(error));
39 });
40 };