react-mention-input
Version:
A React component for input with @mention functionality.
188 lines (187 loc) • 9.25 kB
JavaScript
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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var __generator = (this && this.__generator) || function (thisArg, body) {
var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
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function verb(n) { return function (v) { return step([n, v]); }; }
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import { useState, useEffect, useRef } from 'react';
// Module-level cache to persist blob URLs across component re-renders
var blobUrlCache = new Map();
var fetchingUrls = new Set();
/**
* Custom hook to handle protected image URLs that require authentication tokens in headers.
* For protected URLs, it fetches the image with auth headers and converts it to a blob URL.
* For non-protected URLs, it returns the URL as-is.
* Uses a module-level cache to prevent blinking on re-renders.
*/
export var useProtectedImage = function (_a) {
var url = _a.url, isProtected = _a.isProtected, getAuthHeaders = _a.getAuthHeaders;
var _b = useState(function () {
// Initialize from cache if available
return url ? blobUrlCache.get(url) || null : null;
}), blobUrl = _b[0], setBlobUrl = _b[1];
var previousUrlRef = useRef(null);
var isProtectedRef = useRef(isProtected);
var getAuthHeadersRef = useRef(getAuthHeaders);
var mountedRef = useRef(true);
// Update refs when props change (but don't trigger re-fetch)
useEffect(function () {
isProtectedRef.current = isProtected;
getAuthHeadersRef.current = getAuthHeaders;
}, [isProtected, getAuthHeaders]);
useEffect(function () {
mountedRef.current = true;
return function () {
mountedRef.current = false;
};
}, []);
useEffect(function () {
// Always check cache first and restore if needed (synchronous)
if (url && blobUrlCache.has(url) && !blobUrl) {
var cachedBlobUrl = blobUrlCache.get(url);
setBlobUrl(cachedBlobUrl);
}
// If URL hasn't changed, keep using cached blob URL
if (url === previousUrlRef.current) {
return;
}
var oldUrl = previousUrlRef.current;
previousUrlRef.current = url;
if (!url) {
setBlobUrl(null);
return;
}
// Check if URL is protected
var shouldUseAuth = typeof isProtectedRef.current === 'boolean'
? isProtectedRef.current
: isProtectedRef.current ? isProtectedRef.current(url) : false;
// If not protected, use original URL
if (!shouldUseAuth || !getAuthHeadersRef.current) {
// Clear any cached blob URL for this URL
if (blobUrlCache.has(url)) {
var cachedBlobUrl = blobUrlCache.get(url);
URL.revokeObjectURL(cachedBlobUrl);
blobUrlCache.delete(url);
}
setBlobUrl(null);
return;
}
// Check cache first - if we have a cached blob URL, use it immediately
if (blobUrlCache.has(url)) {
var cachedBlobUrl = blobUrlCache.get(url);
setBlobUrl(cachedBlobUrl);
return;
}
// If already fetching this URL, don't fetch again
if (fetchingUrls.has(url)) {
return;
}
// Fetch protected image with auth headers
fetchingUrls.add(url);
var fetchProtectedImage = function () { return __awaiter(void 0, void 0, void 0, function () {
var headers, response, blob, newBlobUrl, error_1;
return __generator(this, function (_a) {
switch (_a.label) {
case 0:
_a.trys.push([0, 4, 5, 6]);
return [4 /*yield*/, Promise.resolve(getAuthHeadersRef.current())];
case 1:
headers = _a.sent();
return [4 /*yield*/, fetch(url, {
method: 'GET',
headers: __assign({}, headers),
})];
case 2:
response = _a.sent();
if (!response.ok) {
throw new Error("Failed to fetch protected image: ".concat(response.statusText));
}
return [4 /*yield*/, response.blob()];
case 3:
blob = _a.sent();
newBlobUrl = URL.createObjectURL(blob);
// Only update if URL hasn't changed during fetch and component is still mounted
if (previousUrlRef.current === url && mountedRef.current) {
// Cache the blob URL
blobUrlCache.set(url, newBlobUrl);
setBlobUrl(newBlobUrl);
}
else {
// URL changed during fetch or component unmounted, revoke this blob URL
URL.revokeObjectURL(newBlobUrl);
}
return [3 /*break*/, 6];
case 4:
error_1 = _a.sent();
console.error('Error fetching protected image:', error_1);
// On error, only clear if URL hasn't changed and component is mounted
if (previousUrlRef.current === url && mountedRef.current) {
setBlobUrl(null);
}
return [3 /*break*/, 6];
case 5:
fetchingUrls.delete(url);
return [7 /*endfinally*/];
case 6: return [2 /*return*/];
}
});
}); };
fetchProtectedImage();
}, [url]); // Only depend on url
// Cleanup: Don't revoke blob URLs on unmount - keep them in cache for reuse
// They will be cleaned up when the URL changes or when the cache is cleared
// Return blob URL if available, otherwise return original URL (or null)
if (!url) {
return null;
}
var isUrlProtected = typeof isProtectedRef.current === 'boolean'
? isProtectedRef.current
: isProtectedRef.current ? isProtectedRef.current(url) : false;
// For protected URLs, return cached blob URL or current blobUrl state
// For non-protected URLs, return the original URL
if (isUrlProtected) {
return blobUrl || blobUrlCache.get(url) || null;
}
return url;
};