fix(serve): support --platform for mode/platform selection

fixes #3185

Author: imhoffd

packages/@ionic/cli-utils/src/lib/project/angular/serve.ts

@@ -70,6 +70,18 @@ ${chalk.cyan('[1]')}: ${chalk.bold('https://github.com/angular/angular-cli/wiki/
     };
   }
 
+  platformToMode(platform: string): string {
+    if (platform === 'ios') {
+      return 'ios';
+    }
+
+    return 'md';
+  }
+
+  modifyOpenURL(url: string, options: AngularServeOptions): string {
+    return `${url}${options.browserOption ? options.browserOption : ''}${options.platform ? `?ionic:mode=${this.platformToMode(options.platform)}` : ''}`;
+  }
+
   async serveProject(options: AngularServeOptions): Promise<ServeDetails> {
     const [ externalIP, availableInterfaces ] = await this.selectExternalIP(options);
 

packages/@ionic/cli-utils/src/lib/project/ionic-angular/serve.ts

@@ -82,6 +82,10 @@ export class ServeRunner extends BaseServeRunner<IonicAngularServeOptions> {
     };
   }
 
+  modifyOpenURL(url: string, options: IonicAngularServeOptions): string {
+    return `${url}${options.browserOption ? options.browserOption : ''}${options.platform ? `?ionicplatform=${options.platform}` : ''}`;
+  }
+
   async serveProject(options: IonicAngularServeOptions): Promise<ServeDetails> {
     const [ externalIP, availableInterfaces ] = await this.selectExternalIP(options);
     const { port, livereloadPort, notificationPort } = await findOpenIonicPorts(options.address, options);

packages/@ionic/cli-utils/src/lib/project/ionic1/serve.ts

@@ -77,6 +77,10 @@ export class ServeRunner extends BaseServeRunner<Ionic1ServeOptions> {
     };
   }
 
+  modifyOpenURL(url: string, options: Ionic1ServeOptions): string {
+    return `${url}${options.browserOption ? options.browserOption : ''}${options.platform ? `?ionicplatform=${options.platform}` : ''}`;
+  }
+
   async serveProject(options: Ionic1ServeOptions): Promise<ServeDetails> {
     const [ externalIP, availableInterfaces ] = await this.selectExternalIP(options);
     const { port, livereloadPort, notificationPort } = await findOpenIonicPorts(options.address, options);

packages/@ionic/cli-utils/src/lib/serve.ts

@@ -128,6 +128,7 @@ export abstract class ServeRunner<T extends ServeOptions> extends EventEmitter i
 
   abstract getCommandMetadata(): Promise<Partial<CommandMetadata>>;
   abstract serveProject(options: T): Promise<ServeDetails>;
+  abstract modifyOpenURL(url: string, options: T): string;
 
   createOptionsFromCommandLine(inputs: CommandLineInputs, options: CommandLineOptions): ServeOptions {
     const separatedArgs = options['--'];
@@ -236,10 +237,7 @@ export abstract class ServeRunner<T extends ServeOptions> extends EventEmitter i
 
     if (options.open) {
       const openAddress = labAddress ? labAddress : localAddress;
-      const openURL = [openAddress]
-        .concat(options.browserOption ? [options.browserOption] : [])
-        .concat(options.platform ? ['?ionicplatform=', options.platform] : [])
-        .join('');
+      const openURL = this.modifyOpenURL(openAddress, options);
 
       const opn = await import('opn');
       await opn(openURL, { app: options.browser, wait: false });