1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
import { ApolloError } from '@apollo/client/core';
import { readable } from 'svelte/store';
import { client } from '$lib/config/apollo';
import type { DocumentNode, ApolloQueryResult } from '@apollo/client/core';
import type { Readable } from 'svelte/store';
/*
* This is a generic store for use with apollo
*/
type ApolloStoreConfiguration<Type> = {
key: string,
query: DocumentNode,
initialValue?: Type | void
variables?: object
};
type ApolloStoreState<Type> = {
loading: boolean,
data: Type | void,
error: Error | void
};
export const store = function store<Type>({ key, query, initialValue = null, variables = {} }: ApolloStoreConfiguration<Type>): Readable<ApolloStoreState<Type>> {
const initialState: ApolloStoreState<Type> = {
loading: true,
data: initialValue,
error: undefined
};
return readable(
initialState,
(set) => {
const handleError = function (error: Error) {
return set({
loading: false,
data: initialValue,
error
});
};
client.watchQuery({ query, variables }).subscribe(
(result: ApolloQueryResult<Type>) => {
if (result.errors) {
const error = new ApolloError({ graphQLErrors: result.errors });
return handleError(error);
}
set({
loading: false,
data: result.data[key],
error: undefined
});
},
(error: Error) => handleError(error)
);
}
);
};
|
