104 lines
3.0 KiB
TypeScript
104 lines
3.0 KiB
TypeScript
import React, { createContext, useContext, useState, useCallback, useMemo, useEffect } from 'react';
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import PreviewZoomOverlay from '../detail/PreviewZoomOverlay';
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import type { Document } from '../types/documents';
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import type { Identifier } from '../types/identifiers';
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interface PreviewContextType {
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openPreview: (doc: Document) => void;
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closePreview: () => void;
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}
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const PreviewContext = createContext<PreviewContextType | null>(null);
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export const usePreviewContext = () => {
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const context = useContext(PreviewContext);
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if (!context) {
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throw new Error('usePreviewContext must be used within a PreviewProvider');
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}
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return context;
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};
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interface PreviewProviderProps {
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children: React.ReactNode;
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ensureDownloadUrl?: (docId: Identifier) => Promise<any>;
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onNavigate?: (documentId: Identifier) => void;
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}
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export const PreviewProvider: React.FC<PreviewProviderProps> = ({ children, ensureDownloadUrl, onNavigate }) => {
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const [previewDoc, setPreviewDoc] = useState<Document | null>(null);
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const [previewUrl, setPreviewUrl] = useState<string | null>(null);
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const openPreview = useCallback((doc: Document) => {
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setPreviewDoc(doc);
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}, []);
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const closePreview = useCallback(() => {
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setPreviewDoc(null);
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setPreviewUrl(null);
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}, []);
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const handleMaximize = useCallback(() => {
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if (previewDoc && onNavigate) {
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onNavigate(previewDoc.id);
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closePreview();
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}
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}, [previewDoc, onNavigate, closePreview]);
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useEffect(() => {
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if (!previewDoc) {
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setPreviewUrl(null);
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return;
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}
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let cancelled = false;
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if (ensureDownloadUrl) {
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ensureDownloadUrl(previewDoc.id)
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.then((entry) => {
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if (!cancelled && entry?.url) {
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setPreviewUrl(entry.url);
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}
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})
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.catch(() => {
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if (!cancelled) {
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setPreviewUrl(null);
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}
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});
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}
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return () => {
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cancelled = true;
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};
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}, [previewDoc, ensureDownloadUrl]);
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const overlayDocument = useMemo(() => {
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if (!previewDoc || !previewUrl) {
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return previewDoc;
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}
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return {
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...previewDoc,
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documentLink: {
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url: previewUrl,
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alt: previewDoc.title,
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mimeType: previewDoc.mime_type,
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},
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};
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}, [previewDoc, previewUrl]);
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const value = useMemo(() => ({
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openPreview,
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closePreview,
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}), [openPreview, closePreview]);
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return (
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<PreviewContext.Provider value={value}>
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{children}
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<PreviewZoomOverlay
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open={Boolean(previewUrl)}
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onClose={closePreview}
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onMaximize={onNavigate ? handleMaximize : undefined}
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document={overlayDocument}
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/>
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</PreviewContext.Provider>
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);
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};
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