platform-service.ts

import * as path from "path";
import * as shell from "shelljs";
import * as constants from "../constants";
import * as helpers from "../common/helpers";
import * as semver from "semver";
import { AppFilesUpdater } from "./app-files-updater";
import * as temp from "temp";
import Future = require("fibers/future");
temp.track();
let clui = require("clui");

const buildInfoFileName = ".nsbuildinfo";

export class PlatformService implements IPlatformService {
	private _trackedProjectFilePath: string = null;

	constructor(private $devicesService: Mobile.IDevicesService,
		private $errors: IErrors,
		private $fs: IFileSystem,
		private $logger: ILogger,
		private $npmInstallationManager: INpmInstallationManager,
		private $platformsData: IPlatformsData,
		private $projectData: IProjectData,
		private $projectDataService: IProjectDataService,
		private $prompter: IPrompter,
		private $hooksService: IHooksService,
		private $commandsService: ICommandsService,
		private $options: IOptions,
		private $nodeModulesBuilder: INodeModulesBuilder,
		private $pluginsService: IPluginsService,
		private $projectFilesManager: IProjectFilesManager,
		private $mobileHelper: Mobile.IMobileHelper,
		private $hostInfo: IHostInfo,
		private $xmlValidator: IXmlValidator,
		private $npm: INodePackageManager,
		private $sysInfo: ISysInfo,
		private $staticConfig: Config.IStaticConfig,
		private $devicePlatformsConstants: Mobile.IDevicePlatformsConstants,
		private $deviceAppDataFactory: Mobile.IDeviceAppDataFactory,
		private $projectChangesService: IProjectChangesService,
		private $emulatorPlatformService: IEmulatorPlatformService,
		private $childProcess: IChildProcess,
		private $analyticsService: IAnalyticsService) { }

	public addPlatforms(platforms: string[]): IFuture<void> {
		return (() => {
			let platformsDir = this.$projectData.platformsDir;
			this.$fs.ensureDirectoryExists(platformsDir);

			_.each(platforms, platform => {
				this.addPlatform(platform.toLowerCase()).wait();
			});

		}).future<void>()();
	}

	private addPlatform(platformParam: string): IFuture<void> {
		return (() => {
			let data = platformParam.split("@"),
				platform = data[0].toLowerCase(),
				version = data[1];

			this.validatePlatform(platform);

			let platformPath = path.join(this.$projectData.platformsDir, platform);

			if (this.$fs.exists(platformPath)) {
				this.$errors.failWithoutHelp("Platform %s already added", platform);
			}

			let platformData = this.$platformsData.getPlatformData(platform);

			// Copy platform specific files in platforms dir
			let platformProjectService = platformData.platformProjectService;
			platformProjectService.validate().wait();

			// Log the values for project
			this.$logger.trace("Creating NativeScript project for the %s platform", platform);
			this.$logger.trace("Path: %s", platformData.projectRoot);
			this.$logger.trace("Package: %s", this.$projectData.projectId);
			this.$logger.trace("Name: %s", this.$projectData.projectName);

			this.$logger.out("Copying template files...");

			let packageToInstall = "";
			let npmOptions: IStringDictionary = {
				pathToSave: path.join(this.$projectData.platformsDir, platform),
				dependencyType: "save"
			};

			if (!this.$options.frameworkPath) {
				packageToInstall = platformData.frameworkPackageName;
				npmOptions["version"] = version;
			}

			let spinner = new clui.Spinner("Installing " + packageToInstall);
			try {
				spinner.start();
				let downloadedPackagePath = this.$npmInstallationManager.install(packageToInstall, this.$projectData.projectDir, npmOptions).wait();
				let frameworkDir = path.join(downloadedPackagePath, constants.PROJECT_FRAMEWORK_FOLDER_NAME);
				frameworkDir = path.resolve(frameworkDir);

				let coreModuleName = this.addPlatformCore(platformData, frameworkDir).wait();
				this.$npm.uninstall(coreModuleName, { save: true }, this.$projectData.projectDir).wait();
			} catch (err) {
				this.$fs.deleteDirectory(platformPath);
				throw err;
			} finally {
				spinner.stop();
			}

			this.$logger.out("Project successfully created.");

		}).future<void>()();
	}

	private addPlatformCore(platformData: IPlatformData, frameworkDir: string): IFuture<string> {
		return (() => {
			let coreModuleData = this.$fs.readJson(path.join(frameworkDir, "../", "package.json"));
			let installedVersion = coreModuleData.version;
			let coreModuleName = coreModuleData.name;

			this.$projectDataService.initialize(this.$projectData.projectDir);
			let customTemplateOptions = this.getPathToPlatformTemplate(this.$options.platformTemplate, platformData.frameworkPackageName).wait();
			let pathToTemplate = customTemplateOptions && customTemplateOptions.pathToTemplate;
			platformData.platformProjectService.createProject(path.resolve(frameworkDir), installedVersion, pathToTemplate).wait();
			platformData.platformProjectService.ensureConfigurationFileInAppResources();
			platformData.platformProjectService.interpolateData().wait();
			platformData.platformProjectService.afterCreateProject(platformData.projectRoot);

			this.applyBaseConfigOption(platformData);

			let frameworkPackageNameData: any = { version: installedVersion };
			if (customTemplateOptions) {
				frameworkPackageNameData.template = customTemplateOptions.selectedTemplate;
			}
			this.$projectDataService.setValue(platformData.frameworkPackageName, frameworkPackageNameData);

			return coreModuleName;

		}).future<string>()();
	}

	private getPathToPlatformTemplate(selectedTemplate: string, frameworkPackageName: string): IFuture<any> {
		return (() => {
			if (!selectedTemplate) {
				// read data from package.json's nativescript key
				// check the nativescript.tns-<platform>.template value
				let nativescriptPlatformData = this.$projectDataService.getValue(frameworkPackageName);
				selectedTemplate = nativescriptPlatformData && nativescriptPlatformData.template;
			}

			if (selectedTemplate) {
				let tempDir = temp.mkdirSync("platform-template");
				try {
					/*
					 * Output of npm.install is array of arrays. For example:
					 * [ [ 'test-android-platform-template@0.0.1',
					 *	'C:\\Users\\<USER>~1\\AppData\\Local\\Temp\\1\\platform-template11627-15560-rm3ngx\\node_modules\\test-android-platform-template',
					 *	undefined,
					 *	undefined,
					 *	'..\\..\\..\\android-platform-template' ] ]
					 * Project successfully created.
					 */
					let pathToTemplate = this.$npm.install(selectedTemplate, tempDir).wait()[0];
					return { selectedTemplate, pathToTemplate };
				} catch (err) {
					this.$logger.trace("Error while trying to install specified template: ", err);
					this.$errors.failWithoutHelp(`Unable to install platform template ${selectedTemplate}. Make sure the specified value is valid.`);
				}
			}

			return null;
		}).future<any>()();
	}

	public getInstalledPlatforms(): string[] {
		if (!this.$fs.exists(this.$projectData.platformsDir)) {
			return [];
		}

		let subDirs = this.$fs.readDirectory(this.$projectData.platformsDir);
		return _.filter(subDirs, p => this.$platformsData.platformsNames.indexOf(p) > -1);
	}

	public getAvailablePlatforms(): string[] {
		let installedPlatforms = this.getInstalledPlatforms();
		return _.filter(this.$platformsData.platformsNames, p => {
			return installedPlatforms.indexOf(p) < 0 && this.isPlatformSupportedForOS(p); // Only those not already installed
		});
	}

	public getPreparedPlatforms(): string[] {
		return _.filter(this.$platformsData.platformsNames, p => { return this.isPlatformPrepared(p); });
	}

	public preparePlatform(platform: string): IFuture<boolean> {
		return (() => {
			this.validatePlatform(platform);

			this.trackProjectType().wait();

			//We need dev-dependencies here, so before-prepare hooks will be executed correctly.
			try {
				this.$pluginsService.ensureAllDependenciesAreInstalled().wait();
			} catch (err) {
				this.$logger.trace(err);
				this.$errors.failWithoutHelp(`Unable to install dependencies. Make sure your package.json is valid and all dependencies are correct. Error is: ${err.message}`);
			}

			// Need to check if any plugin requires Cocoapods to be installed.
			if (platform === "ios") {
				_.each(this.$pluginsService.getAllInstalledPlugins().wait(), (pluginData: IPluginData) => {
					if (this.$fs.exists(path.join(pluginData.pluginPlatformsFolderPath(platform), "Podfile")) &&
						!this.$sysInfo.getCocoapodVersion().wait()) {
						this.$errors.failWithoutHelp(`${pluginData.name} has Podfile and you don't have Cocoapods installed or it is not configured correctly. Please verify Cocoapods can work on your machine.`);
					}
				});
			}

			this.ensurePlatformInstalled(platform).wait();
			let changesInfo = this.$projectChangesService.checkForChanges(platform);
			if (changesInfo.hasChanges) {
				// android build artifacts need to be cleaned up when switching from release to debug builds
				if (platform.toLowerCase() === "android") {
					let previousPrepareInfo = this.$projectChangesService.getPrepareInfo(platform);
					// clean up prepared plugins when not building for release
					if (previousPrepareInfo && previousPrepareInfo.release !== this.$options.release) {
						let platformData = this.$platformsData.getPlatformData(platform);
						platformData.platformProjectService.cleanProject(platformData.projectRoot, []).wait();
					}
				}

				this.preparePlatformCore(platform, changesInfo).wait();
				this.$projectChangesService.savePrepareInfo(platform);
			} else {
				this.$logger.out("Skipping prepare.");
			}

			return true;
		}).future<boolean>()();
	}

	public validateOptions(platform?: string): IFuture<boolean> {
		return (() => {
			if (platform) {
				platform = this.$mobileHelper.normalizePlatformName(platform);
				this.$logger.trace("Validate options for platform: " + platform);
				let platformData = this.$platformsData.getPlatformData(platform);
				return platformData.platformProjectService.validateOptions().wait();
			} else {
				let valid = true;
				for (let availablePlatform in this.$platformsData.availablePlatforms) {
					this.$logger.trace("Validate options for platform: " + availablePlatform);
					let platformData = this.$platformsData.getPlatformData(availablePlatform);
					valid = valid && platformData.platformProjectService.validateOptions().wait();
				}
				return valid;
			}
		}).future<boolean>()();
	}

	@helpers.hook('prepare')
	private preparePlatformCore(platform: string, changesInfo?: IProjectChangesInfo): IFuture<void> {
		return (() => {
			this.$logger.out("Preparing project...");

			let platformData = this.$platformsData.getPlatformData(platform);

			if (!changesInfo || changesInfo.appFilesChanged) {
				this.copyAppFiles(platform).wait();
			}
			if (!changesInfo || changesInfo.appResourcesChanged) {
				this.copyAppResources(platform);
				platformData.platformProjectService.prepareProject();
			}
			if (!changesInfo || changesInfo.modulesChanged) {
				this.copyTnsModules(platform).wait();
			}

			let directoryPath = path.join(platformData.appDestinationDirectoryPath, constants.APP_FOLDER_NAME);
			let excludedDirs = [constants.APP_RESOURCES_FOLDER_NAME];
			if (!changesInfo || !changesInfo.modulesChanged) {
				excludedDirs.push(constants.TNS_MODULES_FOLDER_NAME);
			}

			this.$projectFilesManager.processPlatformSpecificFiles(directoryPath, platform, excludedDirs);

			if (!changesInfo || changesInfo.configChanged || changesInfo.modulesChanged) {
				this.applyBaseConfigOption(platformData);
				platformData.platformProjectService.processConfigurationFilesFromAppResources().wait();
			}

			platformData.platformProjectService.interpolateConfigurationFile().wait();

			this.$logger.out("Project successfully prepared (" + platform + ")");
		}).future<void>()();
	}

	private copyAppFiles(platform: string): IFuture<void> {
		return (() => {
			let platformData = this.$platformsData.getPlatformData(platform);
			platformData.platformProjectService.ensureConfigurationFileInAppResources();
			let appDestinationDirectoryPath = path.join(platformData.appDestinationDirectoryPath, constants.APP_FOLDER_NAME);

			// Copy app folder to native project
			this.$fs.ensureDirectoryExists(appDestinationDirectoryPath);
			let appSourceDirectoryPath = path.join(this.$projectData.projectDir, constants.APP_FOLDER_NAME);

			const appUpdater = new AppFilesUpdater(appSourceDirectoryPath, appDestinationDirectoryPath, this.$options, this.$fs);
			appUpdater.updateApp(sourceFiles => {
				this.$xmlValidator.validateXmlFiles(sourceFiles);
			});
		}).future<void>()();
	}

	private copyAppResources(platform: string): void {
		let platformData = this.$platformsData.getPlatformData(platform);
		let appDestinationDirectoryPath = path.join(platformData.appDestinationDirectoryPath, constants.APP_FOLDER_NAME);
		let appResourcesDirectoryPath = path.join(appDestinationDirectoryPath, constants.APP_RESOURCES_FOLDER_NAME);
		if (this.$fs.exists(appResourcesDirectoryPath)) {
			platformData.platformProjectService.prepareAppResources(appResourcesDirectoryPath);
			let appResourcesDestination = platformData.platformProjectService.getAppResourcesDestinationDirectoryPath();
			this.$fs.ensureDirectoryExists(appResourcesDestination);
			shell.cp("-Rf", path.join(appResourcesDirectoryPath, platformData.normalizedPlatformName, "*"), appResourcesDestination);
			this.$fs.deleteDirectory(appResourcesDirectoryPath);
		}
	}

	private copyTnsModules(platform: string): IFuture<void> {
		return (() => {
			let platformData = this.$platformsData.getPlatformData(platform);
			let appDestinationDirectoryPath = path.join(platformData.appDestinationDirectoryPath, constants.APP_FOLDER_NAME);
			let lastModifiedTime = this.$fs.exists(appDestinationDirectoryPath) ? this.$fs.getFsStats(appDestinationDirectoryPath).mtime : null;

			try {
				let tnsModulesDestinationPath = path.join(appDestinationDirectoryPath, constants.TNS_MODULES_FOLDER_NAME);
				// Process node_modules folder
				this.$nodeModulesBuilder.prepareNodeModules(tnsModulesDestinationPath, platform, lastModifiedTime).wait();
			} catch (error) {
				this.$logger.debug(error);
				shell.rm("-rf", appDestinationDirectoryPath);
				this.$errors.failWithoutHelp(`Processing node_modules failed. ${error}`);
			}
		}).future<void>()();
	}

	public shouldBuild(platform: string, buildConfig?: IBuildConfig): IFuture<boolean> {
		return (() => {
			if (this.$projectChangesService.currentChanges.changesRequireBuild) {
				return true;
			}
			let platformData = this.$platformsData.getPlatformData(platform);
			let forDevice = !buildConfig || buildConfig.buildForDevice;
			let outputPath = forDevice ? platformData.deviceBuildOutputPath : platformData.emulatorBuildOutputPath;
			if (!this.$fs.exists(outputPath)) {
				return true;
			}
			let packageNames = forDevice ? platformData.validPackageNamesForDevice : platformData.validPackageNamesForEmulator;
			let packages = this.getApplicationPackages(outputPath, packageNames);
			if (packages.length === 0) {
				return true;
			}
			let prepareInfo = this.$projectChangesService.getPrepareInfo(platform);
			let buildInfo = this.getBuildInfo(platform, platformData, buildConfig);
			if (!prepareInfo || !buildInfo) {
				return true;
			}
			if (this.$options.clean) {
				return prepareInfo.time !== buildInfo.prepareTime;
			}
			if (prepareInfo.time === buildInfo.prepareTime) {
				return false;
			}
			return prepareInfo.changesRequireBuildTime !== buildInfo.prepareTime;
		}).future<boolean>()();
	}

	public trackProjectType(): IFuture<void> {
		return (() => {
			// Track each project once per process.
			// In long living process, where we may work with multiple projects, we would like to track the information for each of them.
			if (this.$projectData && (this.$projectData.projectFilePath !== this._trackedProjectFilePath)) {
				this._trackedProjectFilePath = this.$projectData.projectFilePath;

				this.$analyticsService.track("Working with project type", this.$projectData.projectType).wait();
			}
		}).future<void>()();
	}

	public buildPlatform(platform: string, buildConfig?: IBuildConfig): IFuture<void> {
		return (() => {
			this.$logger.out("Building project...");

			this.trackProjectType().wait();

			let platformData = this.$platformsData.getPlatformData(platform);
			platformData.platformProjectService.buildProject(platformData.projectRoot, buildConfig).wait();
			let prepareInfo = this.$projectChangesService.getPrepareInfo(platform);
			let buildInfoFilePath = this.getBuildOutputPath(platform, platformData, buildConfig);
			let buildInfoFile = path.join(buildInfoFilePath, buildInfoFileName);
			let buildInfo: IBuildInfo = {
				prepareTime: prepareInfo.changesRequireBuildTime,
				buildTime: new Date().toString()
			};
			this.$fs.writeJson(buildInfoFile, buildInfo);
			this.$logger.out("Project successfully built.");
		}).future<void>()();
	}

	public shouldInstall(device: Mobile.IDevice): boolean {
		let platform = device.deviceInfo.platform;
		let platformData = this.$platformsData.getPlatformData(platform);
		if (!device.applicationManager.isApplicationInstalled(this.$projectData.projectId).wait()) {
			return true;
		}
		let deviceBuildInfo: IBuildInfo = this.getDeviceBuildInfo(device).wait();
		let localBuildInfo = this.getBuildInfo(platform, platformData, { buildForDevice: !device.isEmulator });
		return !localBuildInfo || !deviceBuildInfo || deviceBuildInfo.buildTime !== localBuildInfo.buildTime;
	}

	public installApplication(device: Mobile.IDevice): IFuture<void> {
		return (() => {
			this.$logger.out("Installing...");
			let platformData = this.$platformsData.getPlatformData(device.deviceInfo.platform);
			let packageFile = "";
			if (this.$devicesService.isiOSSimulator(device)) {
				packageFile = this.getLatestApplicationPackageForEmulator(platformData).packageName;
			} else {
				packageFile = this.getLatestApplicationPackageForDevice(platformData).packageName;
			}
			platformData.platformProjectService.deploy(device.deviceInfo.identifier).wait();
			device.applicationManager.reinstallApplication(this.$projectData.projectId, packageFile).wait();
			if (!this.$options.release) {
				let deviceFilePath = this.getDeviceBuildInfoFilePath(device);
				let buildInfoFilePath = this.getBuildOutputPath(device.deviceInfo.platform, platformData, { buildForDevice: !device.isEmulator });
				let appIdentifier = this.$projectData.projectId;
				device.fileSystem.putFile(path.join(buildInfoFilePath, buildInfoFileName), deviceFilePath, appIdentifier).wait();
			}
			this.$logger.out(`Successfully installed on device with identifier '${device.deviceInfo.identifier}'.`);
		}).future<void>()();
	}

	public deployPlatform(platform: string, forceInstall?: boolean): IFuture<void> {
		return (() => {
			this.preparePlatform(platform).wait();
			this.$logger.out("Searching for devices...");
			this.$devicesService.initialize({ platform: platform, deviceId: this.$options.device }).wait();
			let action = (device: Mobile.IDevice): IFuture<void> => {
				return (() => {
					let buildConfig: IBuildConfig = { buildForDevice: !this.$devicesService.isiOSSimulator(device) };
					let shouldBuild = this.shouldBuild(platform, buildConfig).wait();
					if (shouldBuild) {
						this.buildPlatform(platform, buildConfig).wait();
					} else {
						this.$logger.out("Skipping package build. No changes detected on the native side. This will be fast!");
					}
					if (forceInstall || shouldBuild || this.shouldInstall(device)) {
						this.installApplication(device).wait();
					} else {
						this.$logger.out("Skipping install.");
					}
				}).future<void>()();
			};
			this.$devicesService.execute(action, this.getCanExecuteAction(platform)).wait();
		}).future<void>()();
	}

	public runPlatform(platform: string): IFuture<void> {
		return (() => {
			this.trackProjectType().wait();

			if (this.$options.justlaunch) {
				this.$options.watch = false;
			}
			this.$logger.out("Starting...");
			let action = (device: Mobile.IDevice) => {
				return (() => {
					device.applicationManager.startApplication(this.$projectData.projectId).wait();
					this.$logger.out(`Successfully started on device with identifier '${device.deviceInfo.identifier}'.`);
				}).future<void>()();
			};
			this.$devicesService.initialize({ platform: platform, deviceId: this.$options.device }).wait();
			this.$devicesService.execute(action, this.getCanExecuteAction(platform)).wait();
		}).future<void>()();
	}

	public emulatePlatform(platform: string): IFuture<void> {
		if (this.$options.avd) {
			this.$logger.warn(`Option --avd is no longer supported. Please use --device instead!`);
			return Future.fromResult();
		}
		if (this.$options.availableDevices) {
			return this.$emulatorPlatformService.listAvailableEmulators(platform);
		}
		this.$options.emulator = true;
		if (this.$options.device) {
			let info = this.$emulatorPlatformService.getEmulatorInfo(platform, this.$options.device).wait();
			if (info) {
				if (!info.isRunning) {
					this.$emulatorPlatformService.startEmulator(info).wait();
				}
				this.$options.device = null;
			} else {
				this.$devicesService.initialize({ platform: platform, deviceId: this.$options.device }).wait();
				let found: Mobile.IDeviceInfo[] = [];
				if (this.$devicesService.hasDevices) {
					found = this.$devicesService.getDevices().filter((device: Mobile.IDeviceInfo) => device.identifier === this.$options.device);
				}
				if (found.length === 0) {
					this.$errors.fail("Cannot find device with name: %s", this.$options.device);
				}
			}
		}
		this.deployPlatform(platform).wait();
		return this.runPlatform(platform);
	}

	private getBuildOutputPath(platform: string, platformData: IPlatformData, buildConfig?: IBuildConfig): string {
		let buildForDevice = buildConfig ? buildConfig.buildForDevice : this.$options.forDevice;
		if (platform.toLowerCase() === this.$devicePlatformsConstants.iOS.toLowerCase()) {
			return buildForDevice ? platformData.deviceBuildOutputPath : platformData.emulatorBuildOutputPath;
		}
		return platformData.deviceBuildOutputPath;
	}

	private getDeviceBuildInfoFilePath(device: Mobile.IDevice): string {
		let deviceAppData = this.$deviceAppDataFactory.create(this.$projectData.projectId, device.deviceInfo.platform, device);
		let deviceRootPath = path.dirname(deviceAppData.deviceProjectRootPath);
		return path.join(deviceRootPath, buildInfoFileName);
	}

	private getDeviceBuildInfo(device: Mobile.IDevice): IFuture<IBuildInfo> {
		return (() => {
			let deviceFilePath = this.getDeviceBuildInfoFilePath(device);
			try {
				return JSON.parse(this.readFile(device, deviceFilePath).wait());
			} catch (e) {
				return null;
			};
		}).future<IBuildInfo>()();
	}

	private getBuildInfo(platform: string, platformData: IPlatformData, buildConfig: IBuildConfig): IBuildInfo {
		let buildInfoFilePath = this.getBuildOutputPath(platform, platformData, buildConfig);
		let buildInfoFile = path.join(buildInfoFilePath, buildInfoFileName);
		if (this.$fs.exists(buildInfoFile)) {
			try {
				let buildInfoTime = this.$fs.readJson(buildInfoFile);
				return buildInfoTime;
			} catch (e) {
				return null;
			}
		}
		return null;
	}

	public cleanDestinationApp(platform: string): IFuture<void> {
		return (() => {
			this.ensurePlatformInstalled(platform).wait();

			const appSourceDirectoryPath = path.join(this.$projectData.projectDir, constants.APP_FOLDER_NAME);
			let platformData = this.$platformsData.getPlatformData(platform);
			let appDestinationDirectoryPath = path.join(platformData.appDestinationDirectoryPath, constants.APP_FOLDER_NAME);
			const appUpdater = new AppFilesUpdater(appSourceDirectoryPath, appDestinationDirectoryPath, this.$options, this.$fs);
			appUpdater.cleanDestinationApp();
		}).future<void>()();
	}

	public lastOutputPath(platform: string, settings: { isForDevice: boolean }): string {
		let packageFile: string;
		let platformData = this.$platformsData.getPlatformData(platform);
		if (settings.isForDevice) {
			packageFile = this.getLatestApplicationPackageForDevice(platformData).packageName;
		} else {
			packageFile = this.getLatestApplicationPackageForEmulator(platformData).packageName;
		}
		if (!packageFile || !this.$fs.exists(packageFile)) {
			this.$errors.failWithoutHelp("Unable to find built application. Try 'tns build %s'.", platform);
		}
		return packageFile;
	}

	public copyLastOutput(platform: string, targetPath: string, settings: { isForDevice: boolean }): void {
		platform = platform.toLowerCase();
		targetPath = path.resolve(targetPath);

		let packageFile = this.lastOutputPath(platform, settings);

		this.$fs.ensureDirectoryExists(path.dirname(targetPath));

		if (this.$fs.exists(targetPath) && this.$fs.getFsStats(targetPath).isDirectory()) {
			let sourceFileName = path.basename(packageFile);
			this.$logger.trace(`Specified target path: '${targetPath}' is directory. Same filename will be used: '${sourceFileName}'.`);
			targetPath = path.join(targetPath, sourceFileName);
		}
		this.$fs.copyFile(packageFile, targetPath);
		this.$logger.info(`Copied file '${packageFile}' to '${targetPath}'.`);
	}

	public removePlatforms(platforms: string[]): void {
		this.$projectDataService.initialize(this.$projectData.projectDir);

		_.each(platforms, platform => {
			this.validatePlatformInstalled(platform);
			let platformData = this.$platformsData.getPlatformData(platform);

			let platformDir = path.join(this.$projectData.platformsDir, platform);
			this.$fs.deleteDirectory(platformDir);
			this.$projectDataService.removeProperty(platformData.frameworkPackageName);

			this.$logger.out(`Platform ${platform} successfully removed.`);
		});
	}

	public updatePlatforms(platforms: string[]): IFuture<void> {
		return (() => {
			_.each(platforms, platformParam => {
				let data = platformParam.split("@"),
					platform = data[0],
					version = data[1];

				if (this.isPlatformInstalled(platform)) {
					this.updatePlatform(platform, version).wait();
				} else {
					this.addPlatform(platformParam).wait();
				}
			});
		}).future<void>()();
	}

	private getCanExecuteAction(platform: string): any {
		let canExecute = (currentDevice: Mobile.IDevice): boolean => {
			if (this.$options.device && currentDevice && currentDevice.deviceInfo) {
				let device = this.$devicesService.getDeviceByDeviceOption();
				if (device && device.deviceInfo) {
					return currentDevice.deviceInfo.identifier === device.deviceInfo.identifier;
				}
			}

			if (this.$mobileHelper.isiOSPlatform(platform) && this.$hostInfo.isDarwin) {
				if (this.$devicesService.isOnlyiOSSimultorRunning() || this.$options.emulator || this.$devicesService.isiOSSimulator(currentDevice)) {
					return true;
				}

				return this.$devicesService.isiOSDevice(currentDevice);
			}

			return true;
		};

		return canExecute;
	}

	public validatePlatform(platform: string): void {
		if (!platform) {
			this.$errors.fail("No platform specified.");
		}

		platform = platform.split("@")[0].toLowerCase();

		if (!this.isValidPlatform(platform)) {
			this.$errors.fail("Invalid platform %s. Valid platforms are %s.", platform, helpers.formatListOfNames(this.$platformsData.platformsNames));
		}

		if (!this.isPlatformSupportedForOS(platform)) {
			this.$errors.fail("Applications for platform %s can not be built on this OS - %s", platform, process.platform);
		}
	}

	public validatePlatformInstalled(platform: string): void {
		this.validatePlatform(platform);

		if (!this.isPlatformInstalled(platform)) {
			this.$errors.fail("The platform %s is not added to this project. Please use 'tns platform add <platform>'", platform);
		}
	}

	public ensurePlatformInstalled(platform: string): IFuture<void> {
		return (() => {
			if (!this.isPlatformInstalled(platform)) {
				this.addPlatform(platform).wait();
			}
		}).future<void>()();
	}

	private isPlatformInstalled(platform: string): boolean {
		return this.$fs.exists(path.join(this.$projectData.platformsDir, platform.toLowerCase()));
	}

	private isValidPlatform(platform: string) {
		return this.$platformsData.getPlatformData(platform);
	}

	private isPlatformSupportedForOS(platform: string): boolean {
		let targetedOS = this.$platformsData.getPlatformData(platform).targetedOS;
		let res = !targetedOS || targetedOS.indexOf("*") >= 0 || targetedOS.indexOf(process.platform) >= 0;
		return res;
	}

	private isPlatformPrepared(platform: string): boolean {
		let platformData = this.$platformsData.getPlatformData(platform);
		return platformData.platformProjectService.isPlatformPrepared(platformData.projectRoot);
	}

	private getApplicationPackages(buildOutputPath: string, validPackageNames: string[]): IApplicationPackage[] {
		// Get latest package` that is produced from build
		let candidates = this.$fs.readDirectory(buildOutputPath);
		let packages = _.filter(candidates, candidate => {
			return _.includes(validPackageNames, candidate);
		}).map(currentPackage => {
			currentPackage = path.join(buildOutputPath, currentPackage);

			return {
				packageName: currentPackage,
				time: this.$fs.getFsStats(currentPackage).mtime
			};
		});

		return packages;
	}

	private getLatestApplicationPackage(buildOutputPath: string, validPackageNames: string[]): IApplicationPackage {
		let packages = this.getApplicationPackages(buildOutputPath, validPackageNames);
		if (packages.length === 0) {
			let packageExtName = path.extname(validPackageNames[0]);
			this.$errors.fail("No %s found in %s directory", packageExtName, buildOutputPath);
		}

		packages = _.sortBy(packages, pkg => pkg.time).reverse(); // We need to reverse because sortBy always sorts in ascending order

		return packages[0];
	}

	public getLatestApplicationPackageForDevice(platformData: IPlatformData): IApplicationPackage {
		return this.getLatestApplicationPackage(platformData.deviceBuildOutputPath, platformData.validPackageNamesForDevice);
	}

	public getLatestApplicationPackageForEmulator(platformData: IPlatformData): IApplicationPackage {
		return this.getLatestApplicationPackage(platformData.emulatorBuildOutputPath || platformData.deviceBuildOutputPath, platformData.validPackageNamesForEmulator || platformData.validPackageNamesForDevice);
	}

	private updatePlatform(platform: string, version: string): IFuture<void> {
		return (() => {
			let platformData = this.$platformsData.getPlatformData(platform);

			this.$projectDataService.initialize(this.$projectData.projectDir);
			let data = this.$projectDataService.getValue(platformData.frameworkPackageName);
			let currentVersion = data && data.version ? data.version : "0.2.0";

			let newVersion = version === constants.PackageVersion.NEXT ?
				this.$npmInstallationManager.getNextVersion(platformData.frameworkPackageName).wait() :
				version || this.$npmInstallationManager.getLatestCompatibleVersion(platformData.frameworkPackageName).wait();
			let installedModuleDir = this.$npmInstallationManager.install(platformData.frameworkPackageName, this.$projectData.projectDir, { version: newVersion, dependencyType: "save" }).wait();
			let cachedPackageData = this.$fs.readJson(path.join(installedModuleDir, "package.json"));
			newVersion = (cachedPackageData && cachedPackageData.version) || newVersion;

			let canUpdate = platformData.platformProjectService.canUpdatePlatform(installedModuleDir);
			this.$npm.uninstall(platformData.frameworkPackageName, { save: true }, this.$projectData.projectDir).wait();
			if (canUpdate) {
				if (!semver.valid(newVersion)) {
					this.$errors.fail("The version %s is not valid. The version should consists from 3 parts separated by dot.", newVersion);
				}

				if (!semver.gt(currentVersion, newVersion)) {
					this.updatePlatformCore(platformData, currentVersion, newVersion, canUpdate).wait();
				} else if (semver.eq(currentVersion, newVersion)) {
					this.$errors.fail("Current and new version are the same.");
				} else {
					this.$errors.fail(`Your current version: ${currentVersion} is higher than the one you're trying to install ${newVersion}.`);
				}
			} else {
				this.$errors.failWithoutHelp("Native Platform cannot be updated.");
			}

		}).future<void>()();
	}

	private updatePlatformCore(platformData: IPlatformData, currentVersion: string, newVersion: string, canUpdate: boolean): IFuture<void> {
		return (() => {
			let packageName = platformData.normalizedPlatformName.toLowerCase();
			this.removePlatforms([packageName]);
			packageName = newVersion ? `${packageName}@${newVersion}` : packageName;
			this.addPlatform(packageName).wait();
			this.$logger.out("Successfully updated to version ", newVersion);
		}).future<void>()();
	}

	private applyBaseConfigOption(platformData: IPlatformData): void {
		if (this.$options.baseConfig) {
			let newConfigFile = path.resolve(this.$options.baseConfig);
			this.$logger.trace(`Replacing '${platformData.configurationFilePath}' with '${newConfigFile}'.`);
			this.$fs.copyFile(newConfigFile, platformData.configurationFilePath);
		}
	}

	public readFile(device: Mobile.IDevice, deviceFilePath: string): IFuture<string> {
		return (() => {
			temp.track();
			let uniqueFilePath = temp.path({ suffix: ".tmp" });
			try {
				device.fileSystem.getFile(deviceFilePath, this.$projectData.projectId, uniqueFilePath).wait();
			} catch (e) {
				return null;
			}
			if (this.$fs.exists(uniqueFilePath)) {
				let text = this.$fs.readText(uniqueFilePath);
				shell.rm(uniqueFilePath);
				return text;
			}
			return null;
		}).future<string>()();
	}
}
$injector.register("platformService", PlatformService);