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memos/web/src/components/MemoView/MemoViewContext.tsx

57 lines
2.0 KiB
TypeScript

import { timestampDate } from "@bufbuild/protobuf/wkt";
import { createContext, useContext } from "react";
import { useLocation } from "react-router-dom";
import type { Memo } from "@/types/proto/api/v1/memo_service_pb";
import { MemoRelation_Type } from "@/types/proto/api/v1/memo_service_pb";
import type { User } from "@/types/proto/api/v1/user_service_pb";
import type { PreviewMediaItem } from "@/utils/media-item";
import { RELATIVE_TIME_THRESHOLD_MS } from "./constants";
export interface MemoViewContextValue {
memo: Memo;
creator: User | undefined;
currentUser: User | undefined;
parentPage: string;
cardWidth: number;
isArchived: boolean;
readonly: boolean;
showBlurredContent: boolean;
blurred: boolean;
openEditor: () => void;
toggleBlurVisibility: () => void;
openPreview: (items: string | string[] | PreviewMediaItem[], index?: number) => void;
}
export const MemoViewContext = createContext<MemoViewContextValue | null>(null);
export const useMemoViewContext = (): MemoViewContextValue => {
const context = useContext(MemoViewContext);
if (!context) {
throw new Error("useMemoViewContext must be used within MemoViewContext.Provider");
}
return context;
};
export const computeCommentAmount = (memo: Memo): number =>
memo.relations.filter((r) => r.type === MemoRelation_Type.COMMENT && r.relatedMemo?.name === memo.name).length;
export const useMemoViewDerived = () => {
const { memo, isArchived, readonly } = useMemoViewContext();
const location = useLocation();
const isInMemoDetailPage = location.pathname.startsWith(`/${memo.name}`) || location.pathname.startsWith("/memos/shares/");
const commentAmount = computeCommentAmount(memo);
const displayTime = memo.displayTime ? timestampDate(memo.displayTime) : undefined;
const relativeTimeFormat: "datetime" | "auto" =
displayTime && Date.now() - displayTime.getTime() > RELATIVE_TIME_THRESHOLD_MS ? "datetime" : "auto";
return {
isArchived,
readonly,
isInMemoDetailPage,
commentAmount,
relativeTimeFormat,
};
};