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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177 | 27x
27x
27x
27x
27x
27x
27x
27x
16x
16x
16x
16x
27x
15x
27x
9x
9x
4x
5x
5x
1x
5x
5x
1x
5x
3x
3x
3x
3x
3x
3x
2x
2x
27x
15x
27x
54x
54x
49x
49x
16x
21x
19x
16x
20x
18x
19x
16x
28x
28x
28x
28x
28x
16x
1x
16x
18x
18x
18x
27x
27x
| import * as React from 'react';
import * as PropTypes from 'prop-types';
import ApolloClient, { ApolloError, FetchPolicy } from 'apollo-client';
import { Observable } from 'apollo-link';
import { DocumentNode } from 'graphql';
import { ZenObservable } from 'zen-observable-ts';
import { OperationVariables } from './types';
import { getClient } from './component-utils';
const shallowEqual = require('fbjs/lib/shallowEqual');
const invariant = require('invariant');
export interface SubscriptionResult<TData = any> {
loading: boolean;
data?: TData;
error?: ApolloError;
}
export interface OnSubscriptionDataOptions<TData = any> {
client: ApolloClient<Object>;
subscriptionData: SubscriptionResult<TData>;
}
export interface SubscriptionProps<TData = any, TVariables = OperationVariables> {
subscription: DocumentNode;
variables?: TVariables;
fetchPolicy?: FetchPolicy;
shouldResubscribe?: any;
client?: ApolloClient<Object>;
onSubscriptionData?: (options: OnSubscriptionDataOptions<TData>) => any;
children?: (result: SubscriptionResult<TData>) => React.ReactNode;
}
export interface SubscriptionState<TData = any> {
loading: boolean;
data?: TData;
error?: ApolloError;
}
export interface SubscriptionContext {
client?: ApolloClient<Object>;
}
class Subscription<TData = any, TVariables = any> extends React.Component<
SubscriptionProps<TData, TVariables>,
SubscriptionState<TData>
> {
static contextTypes = {
client: PropTypes.object.isRequired,
};
static propTypes = {
subscription: PropTypes.object.isRequired,
variables: PropTypes.object,
children: PropTypes.func,
onSubscriptionData: PropTypes.func,
shouldResubscribe: PropTypes.oneOfType([PropTypes.func, PropTypes.bool]),
};
private client: ApolloClient<any>;
private queryObservable?: Observable<any>;
private querySubscription?: ZenObservable.Subscription;
constructor(props: SubscriptionProps<TData, TVariables>, context: SubscriptionContext) {
super(props, context);
this.client = getClient(props, context);
this.initialize(props);
this.state = this.getInitialState();
}
componentDidMount() {
this.startSubscription();
}
componentWillReceiveProps(
nextProps: SubscriptionProps<TData, TVariables>,
nextContext: SubscriptionContext,
) {
const nextClient = getClient(nextProps, nextContext);
if (
shallowEqual(this.props.variables, nextProps.variables) &&
this.client === nextClient &&
this.props.subscription === nextProps.subscription
) {
return;
}
let shouldResubscribe = nextProps.shouldResubscribe;
if (typeof shouldResubscribe === 'function') {
shouldResubscribe = !!shouldResubscribe(this.props, nextProps);
}
const shouldNotResubscribe = shouldResubscribe === false;
if (this.client !== nextClient) {
this.client = nextClient;
}
if (!shouldNotResubscribe) {
this.endSubscription();
delete this.queryObservable;
this.initialize(nextProps);
this.startSubscription();
this.setState(this.getInitialState());
return;
}
this.initialize(nextProps);
this.startSubscription();
}
componentWillUnmount() {
this.endSubscription();
}
render() {
const renderFn: any = this.props.children;
if (!renderFn) return null;
const result = Object.assign({}, this.state, {
variables: this.props.variables,
});
return renderFn(result);
}
private initialize = (props: SubscriptionProps<TData, TVariables>) => {
if (this.queryObservable) return;
this.queryObservable = this.client.subscribe({
query: props.subscription,
variables: props.variables,
fetchPolicy: props.fetchPolicy,
});
};
private startSubscription = () => {
if (this.querySubscription) return;
this.querySubscription = this.queryObservable!.subscribe({
next: this.updateCurrentData,
error: this.updateError,
});
};
private getInitialState = () => ({
loading: true,
error: undefined,
data: undefined,
});
private updateCurrentData = (result: SubscriptionResult<TData>) => {
const {
client,
props: { onSubscriptionData },
} = this;
if (onSubscriptionData) onSubscriptionData({ client, subscriptionData: result });
this.setState({
data: result.data,
loading: false,
error: undefined,
});
};
private updateError = (error: any) => {
this.setState({
error,
loading: false,
});
};
private endSubscription = () => {
Eif (this.querySubscription) {
this.querySubscription.unsubscribe();
delete this.querySubscription;
}
};
}
export default Subscription;
|