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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 | 69x 69x 69x 69x 207x 69x 207x 69x 69x 69x 7x 18x 35x 16x 16x 16x 16x 16x 16x 16x 69x 552x 69x 18x 18x 18x 69x 69x 2x 2x 2x 2x 2x 2x 95x 49x 314x 9x | 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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