delta-store/src/google/drive/GoogleDriveAdaptor.ts

An API for a store with change records

/**
 * Created by Papa on 1/3/2016.
 */

import {GoogleDrive} from './GoogleDrive';
import {ApiConstants, GoogleApi} from '../GoogleApi';
import {DriveResponse} from './GoogleDriveModel';
import {DriveConstants} from './GoogleDriveModel';
import {GoogleSetupInfo} from '../GoogleSharingModel';
import {GoogleChangeListShareInfo} from '../GoogleSharingModel';
import {MimeTypes} from './GoogleDriveModel';

export class GoogleDriveAdaptor {

	constructor(
		private googleApi:GoogleApi,
		private googleDrive:GoogleDrive
	) {
	}

	initialize(
		apiKey:string,
		clientId:string
	):Promise<any> {
		return this.googleApi.authorizeApis(apiKey, clientId, ApiConstants.ALL_SCOPES).then(() => {
			let loadRequests = [
				this.googleApi.loadApi('drive', DriveConstants.VERSION),
				this.googleApi.loadApi('drive-realtime,drive-share')
			];
			return Promise.all(loadRequests);
		});
	}

	setup(
		setupInfo:GoogleSetupInfo
	):Promise<DriveResponse> {
		return this.googleDrive.findOrCreateUniqueFolder(setupInfo.rootFolder);
	}

	listChangeLists(
		info:GoogleSetupInfo
	):Promise<GoogleChangeListShareInfo[]> {
		return this.googleDrive.listFiles(info.sharedAppFolderId).then((
			response:DriveResponse
		) => {
			let files = response.result.files;
			if (!files || files.length === 0) {
				return [];
			}
			let shares:GoogleChangeListShareInfo[] = [];
			files.forEach(( file ) => {
				shares.push({
					name: file.name,
					dbId: info.dbIdField,
					folderId: file.id
				});
			});
			return shares;
		});
	}

	populateChangeListFileInfo(
		changeListInfo:GoogleChangeListShareInfo
	):Promise<GoogleChangeListShareInfo> {
		return this.googleDrive.listFiles(changeListInfo.folderId).then((
			response:DriveResponse
		) => {
			let files = response.result.files;
			if (!files || files.length === 0) {
				return changeListInfo;
			}
			files.forEach(( file ) => {
				if (file.mimeType.indexOf(MimeTypes.REALTIME) === 0) {
					if (changeListInfo.realtimeFileId) {
						throw `Multiple Realtime files found for Change List: ${changeListInfo.name}`;
					}
					changeListInfo.realtimeFileId = file.id;
				}
			});
			return changeListInfo;
		});
	}
}