Add external class for making shared URLs with new URL scheme

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/ShareURLMaker.java

+package in.ac.iitb.gymkhana.iitbapp;
+
+import in.ac.iitb.gymkhana.iitbapp.data.Event;
+
+/**
+ * Created by varun on 03-Apr-18.
+ */
+
+public final class ShareURLMaker {
+    public static final String WEB_HOST = "https://instiapp.wncc-iitb.org/";
+
+    public static final String getEventURL(Event event) {
+        return WEB_HOST + "event/" + event.getEventID();
+    }
+}

app/src/main/java/in/ac/iitb/gymkhana/iitbapp/fragment/EventFragment.java

@@ -23,6 +23,7 @@ import java.util.Date;
 
 import in.ac.iitb.gymkhana.iitbapp.Constants;
 import in.ac.iitb.gymkhana.iitbapp.R;
+import in.ac.iitb.gymkhana.iitbapp.ShareURLMaker;
 import in.ac.iitb.gymkhana.iitbapp.api.RetrofitInterface;
 import in.ac.iitb.gymkhana.iitbapp.api.ServiceGenerator;
 import in.ac.iitb.gymkhana.iitbapp.data.Event;
@@ -98,7 +99,7 @@ public class EventFragment extends BaseFragment implements View.OnClickListener
         interestedButton.setOnClickListener(this);
         notGoingButton.setOnClickListener(this);
         shareEventButton.setOnClickListener(new View.OnClickListener() {
-            String shareUrl = "https://instiapp.wncc-iitb.org/event-details/" + event.getEventID();
+            String shareUrl = ShareURLMaker.getEventURL(event);
             @Override
             public void onClick(View view) {
                 Intent i = new Intent(Intent.ACTION_SEND);