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83 lines
2.5 KiB
TypeScript
83 lines
2.5 KiB
TypeScript
/**
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* Minimal message/attachment shape the markdown exporter needs. Product chat's
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* `MessageItem` satisfies it structurally, and partner conversations map into
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* it too — so both surfaces share one serializer.
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*/
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export interface ExportableAttachment {
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type?: string;
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filename?: string;
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mime_type?: string;
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}
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export interface ExportableMessage {
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role: string;
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content: string;
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capability?: string;
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attachments?: ExportableAttachment[];
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}
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function roleHeading(role: string): string {
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if (role === "user") return "User";
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if (role === "assistant") return "Assistant";
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return "System";
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}
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function formatAttachments(attachments?: ExportableAttachment[]): string {
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if (!attachments?.length) return "";
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const items = attachments
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.map((a) => {
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const name = a.filename || a.type || "attachment";
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return a.mime_type ? `\`${name}\` (${a.mime_type})` : `\`${name}\``;
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})
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.join(", ");
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return `_Attachments:_ ${items}\n\n`;
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}
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export interface BuildChatMarkdownOptions {
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title?: string;
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exportedAt?: Date;
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}
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export function buildChatMarkdown(
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messages: ExportableMessage[],
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options: BuildChatMarkdownOptions = {},
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): string {
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const title = options.title?.trim() || "Chat Session";
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const exportedAt = (options.exportedAt ?? new Date()).toISOString();
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const header = `# ${title}\n\n_Exported: ${exportedAt}_\n\n---\n\n`;
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const body = messages
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.map((msg) => {
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const role = roleHeading(msg.role);
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const cap = msg.capability ? ` _(${msg.capability})_` : "";
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const attachments = formatAttachments(msg.attachments);
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const content = (msg.content ?? "").trim();
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return `## ${role}${cap}\n\n${attachments}${content}`.trimEnd();
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})
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.join("\n\n---\n\n");
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return header + body + "\n";
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}
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function sanitizeFilename(input: string): string {
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const cleaned = input
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.replace(/[\\/:*?"<>|\n\r\t]/g, "")
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.replace(/\s+/g, "-")
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.slice(0, 60);
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return cleaned || "chat";
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}
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export function downloadChatMarkdown(
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messages: ExportableMessage[],
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options: BuildChatMarkdownOptions = {},
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): void {
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if (!messages.length) return;
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const markdown = buildChatMarkdown(messages, options);
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const blob = new Blob([markdown], { type: "text/markdown;charset=utf-8" });
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const url = URL.createObjectURL(blob);
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const anchor = document.createElement("a");
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anchor.href = url;
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const date = new Date().toISOString().slice(0, 10);
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anchor.download = `${sanitizeFilename(options.title || "chat")}-${date}.md`;
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anchor.click();
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URL.revokeObjectURL(url);
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}
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