Refactor the type of os from String to an closest enum kind of thing

Summary: This diff updates the type of os in Store from string to a custom enum kind of type.

Reviewed By: passy

Differential Revision: D13622598

fbshipit-source-id: c57a1f2eedbe9e88d43c681c2fa6ca72b93e8808

src/Client.js

@@ -10,7 +10,7 @@ import type BaseDevice from './devices/BaseDevice.js';
 import type {App} from './App.js';
 import type Logger from './fb-stubs/Logger.js';
 import type {Store} from './reducers/index.js';
-
+import type {OS} from './devices/BaseDevice.js';
 import {FlipperDevicePlugin} from './plugin.js';
 import {setPluginState} from './reducers/pluginStates.js';
 import {ReactiveSocket, PartialResponder} from 'rsocket-core';
@@ -22,7 +22,7 @@ type Plugins = Array<string>;
 
 export type ClientQuery = {|
   app: string,
-  os: string,
+  os: OS,
   device: string,
   device_id: string,
 |};

src/devices/BaseDevice.js

@@ -36,6 +36,8 @@ export type DeviceLogListener = (entry: DeviceLogEntry) => void;
 
 export type DeviceType = 'emulator' | 'physical';
 
+export type OS = 'iOS' | 'Android' | 'Windows';
+
 export default class BaseDevice {
   constructor(serial: string, deviceType: DeviceType, title: string) {
     this.serial = serial;
@@ -44,7 +46,7 @@ export default class BaseDevice {
   }
 
   // operating system of this device
-  os: string;
+  os: OS;
 
   // human readable name for this device
   title: string;
@@ -61,7 +63,7 @@ export default class BaseDevice {
   logListeners: Map<Symbol, DeviceLogListener> = new Map();
   logEntries: Array<DeviceLogEntry> = [];
 
-  supportsOS(os: string) {
+  supportsOS(os: OS) {
     return os.toLowerCase() === this.os.toLowerCase();
   }
 

src/index.js

@@ -33,3 +33,4 @@ export {default as DetailSidebar} from './chrome/DetailSidebar.js';
 export {default as AndroidDevice} from './devices/AndroidDevice.js';
 export {default as Device} from './devices/BaseDevice.js';
 export {default as IOSDevice} from './devices/IOSDevice.js';
+export type {OS} from './devices/BaseDevice.js';

src/plugins/crash_reporter/index.js

@@ -26,7 +26,7 @@ import os from 'os';
 import util from 'util';
 import path from 'path';
 import type {Notification} from '../../plugin';
-import type {Store, DeviceLogEntry} from 'flipper';
+import type {Store, DeviceLogEntry, OS} from 'flipper';
 
 export type Crash = {|
   notificationID: string,
@@ -82,7 +82,7 @@ export function getNewPersisitedStateFromCrashLog(
   persistedState: ?PersistedState,
   persistingPlugin: Class<FlipperDevicePlugin<> | FlipperPlugin<>>,
   content: string,
-  os: ?string,
+  os: ?OS,
 ): ?PersistedState {
   const persistedStateReducer = persistingPlugin.persistedStateReducer;
   if (!os || !persistedStateReducer) {
@@ -145,9 +145,9 @@ export function parseCrashLogAndUpdateState(
 export function shouldShowCrashNotification(
   baseDevice: ?BaseDevice,
   content: string,
-  os: ?string,
+  os: ?OS,
 ): boolean {
-  if (os && os.includes('Android')) {
+  if (os && os === 'Android') {
     return true;
   }
   const appPath = parsePath(content);
@@ -159,9 +159,10 @@ export function shouldShowCrashNotification(
   return true;
 }
 
-export function parseCrashLog(content: string, os: string): CrashLog {
+export function parseCrashLog(content: string, os: OS): CrashLog {
   const stubString = 'Cannot figure out the cause';
-  if (os.includes('iOS')) {
+  switch (os) {
+    case 'iOS': {
       const regex = /Exception Type: *[\w]*/;
       const arr = regex.exec(content);
       const exceptionString = arr ? arr[0] : '';
@@ -175,7 +176,8 @@ export function parseCrashLog(content: string, os: string): CrashLog {
         reason: exception,
       };
       return crash;
-  } else if (os.includes('Android')) {
+    }
+    case 'Android': {
       const regForName = /.*\n/;
       const nameRegArr = regForName.exec(content);
       let name = nameRegArr ? nameRegArr[0] : stubString;
@@ -201,7 +203,10 @@ export function parseCrashLog(content: string, os: string): CrashLog {
       };
       return crash;
     }
+    default: {
       throw new Error('Unsupported OS');
+    }
+  }
 }
 
 export function parsePath(content: string): ?string {