shitton of the ai changes

src/ai/transcript-artifact-store.ts

@@ -0,0 +1,42 @@
+import {AiProvider} from "../model/ai-provider";
+import type {StoredAttachment} from "../model/stored-attachment";
+import type {AiDownloadedFile} from "./telegram-attachments";
+import {persistInternalJsonArtifactAttachment} from "./internal-artifact-store";
+
+export async function persistTranscriptArtifactAttachment(params: {
+    provider: AiProvider;
+    transcript: string;
+    downloads: AiDownloadedFile[];
+    chatId: number;
+    messageId: number;
+}): Promise<StoredAttachment | undefined> {
+    const text = params.transcript.trim();
+    if (!text) return Promise.resolve(undefined);
+
+    const sources = params.downloads
+        .filter(download => download.kind === "audio" || download.kind === "video-note")
+        .map(download => ({
+            fileId: download.fileId,
+            fileName: download.fileName,
+            mimeType: download.mimeType,
+            sizeBytes: download.sizeBytes ?? download.buffer.length,
+            sha256: download.sha256,
+        }));
+
+    return await persistInternalJsonArtifactAttachment({
+        artifactKind: "transcript",
+        fileNamePrefix: "transcript",
+        chatId: params.chatId,
+        messageId: params.messageId,
+        payload: {
+            provider: params.provider,
+            transcript: text,
+            sources,
+        },
+        metadata: {
+            provider: params.provider,
+            sourceFileNames: sources.map(source => source.fileName),
+            transcriptChars: text.length,
+        },
+    });
+}