78 lines
2.4 KiB
TypeScript
78 lines
2.4 KiB
TypeScript
/** 数据资源预览：扩展名分流与展示名。 */
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export type DataResourcePreviewKind = "excel" | "text" | "table";
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export const EXCEL_EXTENSIONS = [".xlsx", ".xls"] as const;
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export const TEXT_EXTENSIONS = [".txt", ".json"] as const;
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export const TABLE_EXTENSIONS = [".csv", ".tsv"] as const;
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/** Excel 整文件拉取上限。 */
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export const EXCEL_PREVIEW_MAX_BYTES = 80 * 1024 * 1024;
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/** 文本预览拉取上限。 */
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export const TEXT_PREVIEW_MAX_BYTES = 5 * 1024 * 1024;
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export type DataResourcePreviewTarget = {
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resourceId: string;
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resourceName: string;
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fileExtension: string | null;
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sizeBytes: number;
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kind: DataResourcePreviewKind;
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};
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function lowerName(name: string | null | undefined): string {
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return (name ?? "").toLowerCase();
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}
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function matchesExt(name: string, exts: readonly string[]): boolean {
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return exts.some((ext) => name.endsWith(ext));
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}
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export function isExcelFileName(name: string | null | undefined): boolean {
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return matchesExt(lowerName(name), EXCEL_EXTENSIONS);
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}
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export function isTextPreviewFileName(name: string | null | undefined): boolean {
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return matchesExt(lowerName(name), TEXT_EXTENSIONS);
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}
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export function isTablePreviewFileName(name: string | null | undefined): boolean {
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return matchesExt(lowerName(name), TABLE_EXTENSIONS);
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}
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export function previewKindFromFileName(
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name: string | null | undefined,
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): DataResourcePreviewKind | null {
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const lower = lowerName(name);
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if (matchesExt(lower, EXCEL_EXTENSIONS)) return "excel";
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if (matchesExt(lower, TEXT_EXTENSIONS)) return "text";
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if (matchesExt(lower, TABLE_EXTENSIONS)) return "table";
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return null;
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}
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export function canPreviewDataResource(name: string | null | undefined): boolean {
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return previewKindFromFileName(name) !== null;
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}
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export function resourceDisplayName(
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resourceName: string,
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fileExtension: string | null | undefined,
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): string {
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if (!fileExtension) return resourceName;
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const ext = fileExtension.startsWith(".")
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? fileExtension
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: `.${fileExtension}`;
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if (resourceName.toLowerCase().endsWith(ext.toLowerCase())) {
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return resourceName;
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}
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return `${resourceName}${ext}`;
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}
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/** @deprecated use resourceDisplayName */
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export const excelDisplayName = resourceDisplayName;
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export function monacoLanguageFromFileName(name: string): string {
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const lower = lowerName(name);
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if (lower.endsWith(".json")) return "json";
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return "plaintext";
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}
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