46 lines
1.6 KiB
TypeScript
46 lines
1.6 KiB
TypeScript
import { writeFile } from 'node:fs/promises';
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import { dialog, ipcMain, type BrowserWindow } from 'electron';
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interface TranscriptSaveRequest {
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defaultPath?: unknown;
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markdown?: unknown;
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}
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const MAX_TRANSCRIPT_MARKDOWN_BYTES = 10 * 1024 * 1024;
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function safeDefaultPath(value: unknown): string {
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if (typeof value !== 'string') return 'chat-transcript.md';
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const fileName = value.split(/[\\/]/).filter(Boolean).at(-1)?.trim();
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if (!fileName) return 'chat-transcript.md';
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return fileName.toLowerCase().endsWith('.md') ? fileName : `${fileName}.md`;
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}
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export function registerTranscriptExportHandler(mainWindow: BrowserWindow): void {
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ipcMain.handle('transcript:save', async (_event, request: TranscriptSaveRequest) => {
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if (typeof request?.markdown !== 'string') {
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throw new Error('Invalid transcript markdown');
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}
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if (Buffer.byteLength(request.markdown, 'utf8') > MAX_TRANSCRIPT_MARKDOWN_BYTES) {
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throw new Error('Transcript is too large');
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}
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let selected: Electron.SaveDialogReturnValue;
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try {
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selected = await dialog.showSaveDialog(mainWindow, {
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defaultPath: safeDefaultPath(request.defaultPath),
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filters: [{ name: 'Markdown', extensions: ['md'] }],
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});
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} catch {
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throw new Error('Failed to save transcript');
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}
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if (selected.canceled || !selected.filePath) return { status: 'cancelled' as const };
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try {
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await writeFile(selected.filePath, request.markdown, 'utf8');
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} catch {
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throw new Error('Failed to save transcript');
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}
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return { status: 'saved' as const };
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});
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}
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