Add user REST API

[mjgallag]

General items:

• I have updated the relevant documentation files under docs/
• My code follows the:
  • Google Java style guide (for .java files)
  • Google JavaScript style guide (for .js files)
• ant tests passes on my machine

If your code changes how something works on the device (i.e., it affects the companion):

• I branched from ucr
• My pull request has ucr as the base

Further, if you've changed the blocks language or another user-facing designer/blocks API (added a SimpleProperty, etc.):

• I have updated the corresponding version number in appinventor/components/src/.../common/YaVersion.java
• I have updated the corresponding upgrader in appinventor/appengine/src/.../client/youngandroid/YoungAndroidFormUpgrader.java (components only)
• I have updated the corresponding entries in appinventor/blocklyeditor/src/versioning.js

For all other changes:

• I branched from master
• My pull request has master as the base

What does this PR accomplish?

Description

Fixes # .

Resolves # .

[mark-friedman]

I'm not as well acquainted with the App Inventor client-server Java code as I once was, and of course it has changed since then, so I won't comment much on the particulars. The overall intent and structure looks generally good to me.

I am reminded, though, how wordy and over-engineered Java code can be (or at least App Inventor's Java code). I suppose I have no one to blame but myself, for much of that, though ;-)

[mark-friedman]

Are you planning for there to be additional response classes and response parsers? I only see the one here. Otherwise, this may be premature abstraction.

[mjgallag]

Yes, one for each rpc object. You can't instainte from *.class in gwt client side ... unless I am missing something ...

[mjgallag]

@jisqyv you had mentioned I should check into this when you were looking over my code. I don't think I need to do anything as I send relative URLs with no protocol & host to com.google.gwt.http.client.RequestBuilder so it should just essentially be using Window.Location.getProtocol() + "//" + Window.Location.getHost(). Since setupOrigin does nothing unless service instanceof ServiceDefTarget it should just correctly do nothing when com.google.appinventor.shared.rpc.user.UserInfoService is replaced with com.google.appinventor.client.rest.UserRestService.

appinventor-sources/appinventor/appengine/src/com/google/appinventor/client/Ode.java

Lines 743 to 748 in d0127d6

	setupOrigin(projectService);
	setupOrigin(userInfoService);
	setupOrigin(getMotdService);
	setupOrigin(componentService);
	setupOrigin(adminInfoService);
	setupOrigin(tokenAuthService);

appinventor-sources/appinventor/appengine/src/com/google/appinventor/client/Ode.java

Lines 2580 to 2589 in d0127d6

	public static void setupOrigin(Object service) {
	if (service instanceof ServiceDefTarget) {
	String host = Window.Location.getProtocol() + "//" + Window.Location.getHost();
	String oldUrl = ((ServiceDefTarget)service).getServiceEntryPoint();
	if (oldUrl.startsWith(GWT.getModuleBaseURL())) {
	String newUrl = host + "/" + GWT.getModuleName() + "/" + oldUrl.substring(GWT.getModuleBaseURL().length());
	((ServiceDefTarget)service).setServiceEntryPoint(newUrl);
	}
	}
	}