1 |
|
2 |
|
3 |
|
4 |
|
5 |
|
6 |
|
7 |
|
8 |
|
9 |
|
10 |
|
11 |
|
12 | 'use strict';
|
13 |
|
14 | var useRelayEnvironment = require('./useRelayEnvironment');
|
15 |
|
16 | var warning = require("fbjs/lib/warning");
|
17 |
|
18 | var _require = require('./FragmentResource'),
|
19 | getFragmentResourceForEnvironment = _require.getFragmentResourceForEnvironment;
|
20 |
|
21 | var _require2 = require('react'),
|
22 | useEffect = _require2.useEffect,
|
23 | useRef = _require2.useRef,
|
24 | useState = _require2.useState;
|
25 |
|
26 | var _require3 = require('relay-runtime'),
|
27 | getFragmentIdentifier = _require3.getFragmentIdentifier;
|
28 |
|
29 | function useFragmentNode(fragmentNode, fragmentRef, componentDisplayName) {
|
30 | var environment = useRelayEnvironment();
|
31 | var FragmentResource = getFragmentResourceForEnvironment(environment);
|
32 | var isMountedRef = useRef(false);
|
33 |
|
34 | var _useState = useState(0),
|
35 | forceUpdate = _useState[1];
|
36 |
|
37 | var fragmentIdentifier = getFragmentIdentifier(fragmentNode, fragmentRef);
|
38 |
|
39 |
|
40 |
|
41 |
|
42 | var mustResubscribeGenerationRef = useRef(0);
|
43 | var shouldUpdateGenerationRef = useRef(0);
|
44 | var environmentChanged = useHasChanged(environment);
|
45 | var fragmentIdentifierChanged = useHasChanged(fragmentIdentifier);
|
46 |
|
47 |
|
48 |
|
49 | var mustResubscribe = environmentChanged || fragmentIdentifierChanged;
|
50 |
|
51 |
|
52 |
|
53 |
|
54 |
|
55 |
|
56 |
|
57 |
|
58 |
|
59 |
|
60 |
|
61 |
|
62 |
|
63 | if (mustResubscribe) {
|
64 | shouldUpdateGenerationRef.current++;
|
65 | mustResubscribeGenerationRef.current++;
|
66 | }
|
67 |
|
68 |
|
69 | var fragmentResult = FragmentResource.readWithIdentifier(fragmentNode, fragmentRef, fragmentIdentifier, componentDisplayName);
|
70 | var isListeningForUpdatesRef = useRef(true);
|
71 |
|
72 | function enableStoreUpdates() {
|
73 | isListeningForUpdatesRef.current = true;
|
74 | var didMissUpdates = FragmentResource.checkMissedUpdates(fragmentResult)[0];
|
75 |
|
76 | if (didMissUpdates) {
|
77 | handleDataUpdate();
|
78 | }
|
79 | }
|
80 |
|
81 | function disableStoreUpdates() {
|
82 | isListeningForUpdatesRef.current = false;
|
83 | }
|
84 |
|
85 | function handleDataUpdate() {
|
86 | if (isMountedRef.current === false || isListeningForUpdatesRef.current === false) {
|
87 | return;
|
88 | }
|
89 |
|
90 |
|
91 |
|
92 | shouldUpdateGenerationRef.current++;
|
93 |
|
94 |
|
95 |
|
96 | forceUpdate(function (count) {
|
97 | return count + 1;
|
98 | });
|
99 | }
|
100 |
|
101 |
|
102 |
|
103 | useEffect(function () {
|
104 | isMountedRef.current = true;
|
105 | var disposable = FragmentResource.subscribe(fragmentResult, handleDataUpdate);
|
106 | return function () {
|
107 |
|
108 |
|
109 |
|
110 |
|
111 | isMountedRef.current = false;
|
112 | disposable.dispose();
|
113 | };
|
114 |
|
115 |
|
116 | }, [mustResubscribeGenerationRef.current]);
|
117 |
|
118 | if (process.env.NODE_ENV !== "production") {
|
119 | if (fragmentRef != null && fragmentResult.data == null) {
|
120 | process.env.NODE_ENV !== "production" ? warning(false, 'Relay: Expected to have been able to read non-null data for ' + 'fragment `%s` declared in ' + '`%s`, since fragment reference was non-null. ' + "Make sure that that `%s`'s parent isn't " + 'holding on to and/or passing a fragment reference for data that ' + 'has been deleted.', fragmentNode.name, componentDisplayName, componentDisplayName) : void 0;
|
121 | }
|
122 | }
|
123 |
|
124 | return {
|
125 |
|
126 | data: fragmentResult.data,
|
127 | disableStoreUpdates: disableStoreUpdates,
|
128 | enableStoreUpdates: enableStoreUpdates,
|
129 | shouldUpdateGeneration: shouldUpdateGenerationRef.current
|
130 | };
|
131 | }
|
132 |
|
133 | function useHasChanged(value) {
|
134 | var _useState2 = useState(value),
|
135 | mirroredValue = _useState2[0],
|
136 | setMirroredValue = _useState2[1];
|
137 |
|
138 | var valueChanged = mirroredValue !== value;
|
139 |
|
140 | if (valueChanged) {
|
141 | setMirroredValue(value);
|
142 | }
|
143 |
|
144 | return valueChanged;
|
145 | }
|
146 |
|
147 | module.exports = useFragmentNode; |
\ | No newline at end of file |