Курнат Андрей
53 lines
1.9 KiB
TypeScript
53 lines
1.9 KiB
TypeScript
export const DOCX_MIME_TYPE = "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
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export const XLSX_MIME_TYPE = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
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export const PPTX_MIME_TYPE = "application/vnd.openxmlformats-officedocument.presentationml.presentation";
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export const EML_MIME_TYPE = "message/rfc822;charset=utf-8";
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const pathSeparatorPattern = /[/\\]/;
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export function officeTitleFromFileName(fileName: string, fallbackTitle: string) {
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const trimmed = fileName.trim();
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if (!trimmed) {
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return fallbackTitle;
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}
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const parts = trimmed.split(pathSeparatorPattern).filter(Boolean);
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return parts[parts.length - 1] ?? fallbackTitle;
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}
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export function replaceFileExtension(fileName: string, extension: string) {
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const normalizedExtension = extension.startsWith(".") ? extension : `.${extension}`;
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const baseName = fileName.trim() || "Документ";
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const withoutExtension = baseName.replace(/\.[^.\\/]+$/, "");
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return `${withoutExtension}${normalizedExtension}`;
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}
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export async function readOfficeFileAsArrayBuffer(file: File) {
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if (typeof file.arrayBuffer !== "function") {
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return readFileWithFileReader(file);
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}
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return file.arrayBuffer();
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}
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function readFileWithFileReader(file: File): Promise<ArrayBuffer> {
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if (typeof FileReader === "undefined") {
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throw new Error("Не удалось прочитать файл: среда не поддерживает File.arrayBuffer() и FileReader.");
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}
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return new Promise((resolve, reject) => {
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const reader = new FileReader();
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reader.onerror = () => reject(new Error("Не удалось прочитать файл."));
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reader.onload = () => {
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if (reader.result instanceof ArrayBuffer) {
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resolve(reader.result);
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return;
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}
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reject(new Error("Не удалось прочитать файл как ArrayBuffer."));
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};
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reader.readAsArrayBuffer(file);
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});
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}
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