git.r.bdr.sh - rbdr/forum/blob - 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 };