import type { FastMCP } from 'fastmcp';
import { UserError } from 'fastmcp';
import { z } from 'zod';
import { docs_v1 } from 'googleapis';
import { getDocsClient } from '../../clients.js';
import { DocumentIdParameter } from '../../types.js';
import * as GDocsHelpers from '../../googleDocsApiHelpers.js';
export function register(server: FastMCP) {
server.addTool({
name: 'insertPageBreak',
description: 'Inserts a page break at a character index in the document.',
parameters: DocumentIdParameter.extend({
index: z
.number()
.int()
.min(1)
.describe(
"1-based character index within the document body. Use readDocument with format='json' to inspect indices."
),
tabId: z
.string()
.optional()
.describe(
'The ID of the specific tab to insert into. Use listDocumentTabs to get tab IDs. If not specified, inserts into the first tab.'
),
}),
execute: async (args, { log }) => {
const docs = await getDocsClient();
log.info(
`Inserting page break in doc ${args.documentId} at index ${args.index}${args.tabId ? ` (tab: ${args.tabId})` : ''}`
);
try {
// If tabId is specified, verify the tab exists
if (args.tabId) {
const docInfo = await docs.documents.get({
documentId: args.documentId,
includeTabsContent: true,
fields: 'tabs(tabProperties,documentTab)',
});
const targetTab = GDocsHelpers.findTabById(docInfo.data, args.tabId);
if (!targetTab) {
throw new UserError(`Tab with ID "${args.tabId}" not found in document.`);
}
if (!targetTab.documentTab) {
throw new UserError(
`Tab "${args.tabId}" does not have content (may not be a document tab).`
);
}
}
const location: any = { index: args.index };
if (args.tabId) {
location.tabId = args.tabId;
}
const request: docs_v1.Schema$Request = {
insertPageBreak: { location },
};
await GDocsHelpers.executeBatchUpdate(docs, args.documentId, [request]);
return `Successfully inserted page break at index ${args.index}${args.tabId ? ` in tab ${args.tabId}` : ''}.`;
} catch (error: any) {
log.error(
`Error inserting page break in doc ${args.documentId}: ${error.message || error}`
);
if (error instanceof UserError) throw error;
throw new UserError(`Failed to insert page break: ${error.message || 'Unknown error'}`);
}
},
});
}
