Add support for resending verification email in case of expired token (#3617)

* -Defines new public API route /apps/:appId/resend_verification_email that will generate a new email verification link and email for a user identified by username in POST body
-Add template and url support for invalidVerificationLink, linkSendSuccess, and linkSendFail pages. The invalidVerificationLink pages includes a button that allows the user to generate a new verification email if their current token has expired, using the new public API route
-All three pages have default html that will be functional out of the box, but they can be customized in the customPages object. The custom page for invalidVerificationLink needs to handle the extraction of the username and appId from the url and the POST to generate the new link (this requires javascript)
-Clicking a link for an email that has already been verified now routes to the emailVerifySuccess page instead of the invalidLink page

* Fix package.json repo url to be parse-server againwq

* Fix js lint issues

* Update unit tests

* Use arrow functions, change html page comments, use qs and a string template to construct location for invalidVerificationLink page, syntax fixes

* Remember to pass result when using arrow function

spec/ValidationAndPasswordsReset.spec.js

@@ -655,7 +655,7 @@ describe("Custom Pages, Email Verification, Password Reset", () => {
     });
   });
 
-  it('redirects you to invalid link if you try to validate a nonexistant users email', done => {
+  it('redirects you to invalid verification link page if you try to validate a nonexistant users email', done => {
     reconfigureServer({
       appName: 'emailing app',
       verifyUserEmails: true,
@@ -671,7 +671,32 @@ describe("Custom Pages, Email Verification, Password Reset", () => {
         followRedirect: false,
       }, (error, response) => {
         expect(response.statusCode).toEqual(302);
-        expect(response.body).toEqual('Found. Redirecting to http://localhost:8378/1/apps/invalid_link.html');
+        expect(response.body).toEqual('Found. Redirecting to http://localhost:8378/1/apps/invalid_verification_link.html?username=sadfasga&appId=test');
+        done();
+      });
+    });
+  });
+
+  it('redirects you to link send fail page if you try to resend a link for a nonexistant user', done => {
+    reconfigureServer({
+      appName: 'emailing app',
+      verifyUserEmails: true,
+      emailAdapter: {
+        sendVerificationEmail: () => Promise.resolve(),
+        sendPasswordResetEmail: () => Promise.resolve(),
+        sendMail: () => {}
+      },
+      publicServerURL: "http://localhost:8378/1"
+    })
+    .then(() => {
+      request.post('http://localhost:8378/1/apps/test/resend_verification_email', {
+        followRedirect: false,
+        form: {
+          username: "sadfasga"
+        }
+      }, (error, response) => {
+        expect(response.statusCode).toEqual(302);
+        expect(response.body).toEqual('Found. Redirecting to http://localhost:8378/1/apps/link_send_fail.html');
         done();
       });
     });
@@ -685,7 +710,7 @@ describe("Custom Pages, Email Verification, Password Reset", () => {
           followRedirect: false,
         }, (error, response) => {
           expect(response.statusCode).toEqual(302);
-          expect(response.body).toEqual('Found. Redirecting to http://localhost:8378/1/apps/invalid_link.html');
+          expect(response.body).toEqual('Found. Redirecting to http://localhost:8378/1/apps/invalid_verification_link.html?username=zxcv&appId=test');
           user.fetch()
           .then(() => {
             expect(user.get('emailVerified')).toEqual(false);