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import type { Message } from "$lib/types/Message";
import type { EndpointMessage } from "./endpoints";
import { downloadFile } from "../files/downloadFile";
import type { ObjectId } from "mongodb";
export async function preprocessMessages(
messages: Message[],
convId: ObjectId
): Promise<EndpointMessage[]> {
return Promise.resolve(messages)
.then((msgs) => downloadFiles(msgs, convId))
.then((msgs) => injectClipboardFiles(msgs))
.then((msgs) => expandPersonaResponses(msgs));
}
/**
* Expand messages with personaResponses into the content field
* For multi-persona messages, concatenate all persona responses
* This ensures all personas see what others said in previous turns
*/
function expandPersonaResponses(messages: EndpointMessage[]): EndpointMessage[] {
return messages.map((message) => {
// If message has persona responses, format them into content
if (message.personaResponses && message.personaResponses.length > 0) {
const personaContents = message.personaResponses
.map((pr) => {
// Format: "[PersonaName]: content"
const name = pr.personaName || pr.personaId;
return `[${name}]: ${pr.content}`;
})
.join("\n\n");
return {
...message,
content: `--- Transcript of responses from participating personas ---\n${personaContents}`,
};
}
return message;
});
}
async function downloadFiles(messages: Message[], convId: ObjectId): Promise<EndpointMessage[]> {
return Promise.all(
messages.map<Promise<EndpointMessage>>((message) =>
Promise.all((message.files ?? []).map((file) => downloadFile(file.value, convId))).then(
(files) => ({ ...message, files })
)
)
);
}
async function injectClipboardFiles(messages: EndpointMessage[]) {
return Promise.all(
messages.map((message) => {
const plaintextFiles = message.files
?.filter((file) => file.mime === "application/vnd.chatui.clipboard")
.map((file) => Buffer.from(file.value, "base64").toString("utf-8"));
if (!plaintextFiles || plaintextFiles.length === 0) return message;
return {
...message,
content: `${plaintextFiles.join("\n\n")}\n\n${message.content}`,
files: message.files?.filter((file) => file.mime !== "application/vnd.chatui.clipboard"),
};
})
);
}
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