joplin/packages/app-desktop/gui/NoteEditor/utils/useMessageHandler.ts

import { useCallback } from 'react';
import { FormNote } from './types';
import contextMenu from './contextMenu';
import ResourceEditWatcher from '@joplin/lib/services/ResourceEditWatcher/index';
import { _ } from '@joplin/lib/locale';
const BaseItem = require('@joplin/lib/models/BaseItem');
const BaseModel = require('@joplin/lib/BaseModel').default;
const Resource = require('@joplin/lib/models/Resource.js');
const bridge = require('electron').remote.require('./bridge').default;
const { urlDecode } = require('@joplin/lib/string-utils');
const urlUtils = require('@joplin/lib/urlUtils');
const ResourceFetcher = require('@joplin/lib/services/ResourceFetcher.js');
const { reg } = require('@joplin/lib/registry.js');

export default function useMessageHandler(scrollWhenReady:any, setScrollWhenReady:Function, editorRef:any, setLocalSearchResultCount:Function, dispatch:Function, formNote:FormNote) {
	return useCallback(async (event: any) => {
		const msg = event.channel ? event.channel : '';
		const args = event.args;
		const arg0 = args && args.length >= 1 ? args[0] : null;

		// if (msg !== 'percentScroll') console.info(`Got ipc-message: ${msg}`, arg0);

		if (msg.indexOf('error:') === 0) {
			const s = msg.split(':');
			s.splice(0, 1);
			reg.logger().error(s.join(':'));
		} else if (msg === 'noteRenderComplete') {
			if (scrollWhenReady) {
				const options = { ...scrollWhenReady };
				setScrollWhenReady(null);
				editorRef.current.scrollTo(options);
			}
		} else if (msg === 'setMarkerCount') {
			setLocalSearchResultCount(arg0);
		} else if (msg.indexOf('markForDownload:') === 0) {
			const s = msg.split(':');
			if (s.length < 2) throw new Error(`Invalid message: ${msg}`);
			ResourceFetcher.instance().markForDownload(s[1]);
		} else if (msg === 'contextMenu') {
			const menu = await contextMenu({
				itemType: arg0 && arg0.type,
				resourceId: arg0.resourceId,
				textToCopy: arg0.textToCopy,
				linkToCopy: arg0.linkToCopy || null,
				htmlToCopy: '',
				insertContent: () => { console.warn('insertContent() not implemented'); },
			});

			menu.popup(bridge().window());
		} else if (msg.indexOf('joplin://') === 0) {
			const resourceUrlInfo = urlUtils.parseResourceUrl(msg);
			const itemId = resourceUrlInfo.itemId;
			const item = await BaseItem.loadItemById(itemId);

			if (!item) throw new Error(`No item with ID ${itemId}`);

			if (item.type_ === BaseModel.TYPE_RESOURCE) {
				const localState = await Resource.localState(item);
				if (localState.fetch_status !== Resource.FETCH_STATUS_DONE || !!item.encryption_blob_encrypted) {
					if (localState.fetch_status === Resource.FETCH_STATUS_ERROR) {
						bridge().showErrorMessageBox(`${_('There was an error downloading this attachment:')}\n\n${localState.fetch_error}`);
					} else {
						bridge().showErrorMessageBox(_('This attachment is not downloaded or not decrypted yet'));
					}
					return;
				}

				try {
					await ResourceEditWatcher.instance().openAndWatch(item.id);
				} catch (error) {
					console.error(error);
					bridge().showErrorMessageBox(error.message);
				}
			} else if (item.type_ === BaseModel.TYPE_NOTE) {
				dispatch({
					type: 'FOLDER_AND_NOTE_SELECT',
					folderId: item.parent_id,
					noteId: item.id,
					hash: resourceUrlInfo.hash,
				});
			} else {
				throw new Error(`Unsupported item type: ${item.type_}`);
			}
		} else if (urlUtils.urlProtocol(msg)) {
			if (msg.indexOf('file://') === 0) {
				// When using the file:// protocol, openExternal doesn't work (does nothing) with URL-encoded paths
				require('electron').shell.openExternal(urlDecode(msg));
			} else {
				require('electron').shell.openExternal(msg);
			}
		} else if (msg.indexOf('#') === 0) {
			// This is an internal anchor, which is handled by the WebView so skip this case
		} else {
			bridge().showErrorMessageBox(_('Unsupported link or message: %s', msg));
		}
	}, [dispatch, setLocalSearchResultCount, scrollWhenReady, formNote]);
}