Merge pull request #14897 from wordpress-mobile/task/enable-tooltip-50-percent

Editor Onboarding: Enable tooltip for 50% of users

Author: AmandaRiu

WordPress/src/main/java/org/wordpress/android/ui/posts/EditPostActivity.java

@@ -4,6 +4,7 @@
 import android.app.Activity;
 import android.app.ProgressDialog;
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
@@ -224,6 +225,9 @@
 import org.wordpress.aztec.util.AztecLog;
 
 import java.io.File;
+import java.math.BigInteger;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.HashMap;
@@ -302,7 +306,7 @@ public class EditPostActivity extends LocaleAwareActivity implements
     private static final int PAGE_SETTINGS = 1;
     private static final int PAGE_PUBLISH_SETTINGS = 2;
     private static final int PAGE_HISTORY = 3;
-    private static final int EDITOR_ONBOARDING_PHASE_PERCENTAGE = 0;
+    private static final int EDITOR_ONBOARDING_PHASE_PERCENTAGE = 50;
 
     private AztecImageLoader mAztecImageLoader;
 
@@ -2296,7 +2300,7 @@ private GutenbergPropsBuilder getGutenbergPropsBuilder() {
         boolean isFreeWPCom = mSite.isWPCom() && SiteUtils.onFreePlan(mSite);
         boolean isWPComSite = mSite.isWPCom() || mSite.isWPComAtomic();
 
-        boolean enableEditorOnboarding = canViewEditorOnboarding() && !AppPrefs.hasLaunchedGutenbergEditor();
+        boolean enableEditorOnboarding = !AppPrefs.hasLaunchedGutenbergEditor() && canViewEditorOnboarding();
 
         return new GutenbergPropsBuilder(
                 mContactInfoBlockFeatureConfig.isEnabled() && SiteUtils.supportsContactInfoFeature(mSite),
@@ -2316,9 +2320,51 @@ private GutenbergPropsBuilder getGutenbergPropsBuilder() {
         );
     }
 
-    private Boolean canViewEditorOnboarding() {
-        return (mAccountStore.getAccount().getUserId() % 100 >= (100 - EDITOR_ONBOARDING_PHASE_PERCENTAGE)
-                || BuildConfig.DEBUG);
+    /**
+     * Temporary method for the Editor Onboarding project to control the percentage
+     * of users able to use this new editor onboarding tooltip feature. This will eventually
+     * be removed when the functionality is opened to all users.
+     */
+    private boolean canViewEditorOnboarding() {
+        // Get the userId for the logged in user. If not WPcom, use the anonymous userId
+        // generated by tracks.
+        long userAccountId = mAccountStore.getAccount().getUserId();
+        String userId = String.valueOf(userAccountId);
+        if (userAccountId == 0) {
+            SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+            userId = preferences.getString("nosara_tracks_anon_id", null);
+        }
+
+        int hashedUserId = convertUserIdToHash(userId, "can_view_editor_onboarding");
+        return hashedUserId % 100 >= (100 - EDITOR_ONBOARDING_PHASE_PERCENTAGE) || BuildConfig.DEBUG;
+    }
+
+    /**
+     * Temporary method for the Editor Onboarding project to control the percentage
+     * of users able to use this new editor onboarding tooltip feature. This will eventually
+     * be removed when the functionality is opened to all users.
+     *
+     * Uses cryptography to hash a userId plus a seed containing the feature flag, converts
+     * the result into a BigInteger, then divides that value by 100 and returns the remainder.
+     * The value returned will be used to determine if a user should see the editor onboarding
+     * tooltip.
+     *
+     * @param userId A unique ID for the logged in user.
+     * @param seed The feature string to keep hashed value results between features unique.
+     * @return An int between 1 and 100
+     */
+    private int convertUserIdToHash(String userId, String seed) {
+        String seededUserId = userId + seed;
+        int hashInt = 0;
+        try {
+            MessageDigest digest = MessageDigest.getInstance("SHA-256");
+            byte[] hash = digest.digest(seededUserId.getBytes());
+            BigInteger value = new BigInteger(hash);
+            hashInt = value.mod(BigInteger.valueOf(100)).intValue();
+        } catch (NoSuchAlgorithmException e) {
+            AppLog.e(T.EDITOR, e);
+        }
+        return hashInt;
     }
 
     // Moved from EditPostContentFragment
@@ -3216,7 +3262,6 @@ public Map<String, String> onAuthHeaderRequested(String url) {
 
     @Override
     public void onEditorFragmentInitialized() {
-        boolean shouldFinishInit = true;
         // now that we have the Post object initialized,
         // check whether we have media items to insert from the WRITE POST with media functionality
         if (getIntent().hasExtra(EXTRA_INSERT_MEDIA)) {