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| 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 | 253x 253x 253x 253x 759x 253x 759x 253x 253x 253x 13x 82x 143x 28x 28x 28x 28x 28x 28x 28x 253x 2024x 253x 82x 82x 82x 253x 253x 10x 10x 10x 10x 10x 10x 307x 147x 988x 15x | import { useCallback, useEffect, useRef, useState } from "react";
import { isNewerServerData } from "../model/settingsDrafts";
import type {
FieldMessages,
SaveState,
ServerDataStamp,
} from "../model/settingsTypes";
export function useServerSyncedDraft<TDraft extends object>({
studyId,
serverDraft,
serverStamp,
draftMatchesSavedDraft,
fieldMessagesForDraft,
}: {
studyId: number;
serverDraft: TDraft;
serverStamp: ServerDataStamp;
draftMatchesSavedDraft: (nextDraft: TDraft, savedDraft: TDraft) => boolean;
fieldMessagesForDraft: (draft: TDraft) => FieldMessages<TDraft>;
}) {
const [draft, setDraft] = useState<TDraft>(serverDraft);
const [dirty, setDirty] = useState(false);
const [fieldMessages, setFieldMessages] = useState<FieldMessages<TDraft>>(
() => fieldMessagesForDraft(serverDraft),
);
const [saveState, setSaveState] = useState<SaveState>({ kind: "idle" });
const acceptedServerRef = useRef({ studyId, stamp: serverStamp });
const unconfirmedSavedDraftRef = useRef<TDraft | null>(null);
useEffect(() => {
const studyChanged = acceptedServerRef.current.studyId !== studyId;
if (studyChanged) {
unconfirmedSavedDraftRef.current = null;
}
Iif (!studyChanged && dirty) return;
if (
!studyChanged &&
!isNewerServerData(serverStamp, acceptedServerRef.current.stamp)
) {
return;
}
const unconfirmedSavedDraft = unconfirmedSavedDraftRef.current;
if (
!studyChanged &&
shouldKeepUnconfirmedSavedDraft(
serverDraft,
unconfirmedSavedDraft,
draftMatchesSavedDraft,
)
) {
return;
}
unconfirmedSavedDraftRef.current = null;
if (unconfirmedSavedDraft) {
setDirty(false);
setFieldMessages(fieldMessagesForDraft(unconfirmedSavedDraft));
setSaveState((current) =>
current.kind === "saved" ? current : { kind: "idle" },
);
acceptedServerRef.current = { studyId, stamp: serverStamp };
return;
}
setDraft(serverDraft);
setDirty(false);
setFieldMessages(fieldMessagesForDraft(serverDraft));
setSaveState((current) =>
current.kind === "saved" ? current : { kind: "idle" },
);
acceptedServerRef.current = { studyId, stamp: serverStamp };
}, [
dirty,
draftMatchesSavedDraft,
fieldMessagesForDraft,
serverDraft,
serverStamp,
studyId,
]);
const updateDraft = useCallback((patch: Partial<TDraft>) => {
setDraft((current) => ({ ...current, ...patch }));
setDirty(true);
setSaveState({ kind: "idle" });
}, []);
const confirmSavedDraft = useCallback(
({
draft: savedDraft,
hasFreshResponse,
responseStamp,
message,
}: {
draft: TDraft;
hasFreshResponse: boolean;
responseStamp: ServerDataStamp;
message: string;
}) => {
unconfirmedSavedDraftRef.current = hasFreshResponse ? null : savedDraft;
acceptedServerRef.current = {
studyId,
stamp: hasFreshResponse
? responseStamp
: acceptedServerRef.current.stamp,
};
setDirty(false);
setFieldMessages(fieldMessagesForDraft(savedDraft));
setSaveState({ kind: "saved", message });
},
[fieldMessagesForDraft, studyId],
);
return {
draft,
dirty,
fieldMessages,
saveState,
setFieldMessages,
setSaveState,
updateDraft,
confirmSavedDraft,
};
}
function shouldKeepUnconfirmedSavedDraft<TDraft>(
nextDraft: TDraft,
savedDraft: TDraft | null,
matchesSavedDraft: (nextDraft: TDraft, savedDraft: TDraft) => boolean,
) {
return savedDraft != null && !matchesSavedDraft(nextDraft, savedDraft);
}
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