Add a feature flag system.

src/org/thoughtcrime/securesms/mediasend/MediaSendViewModel.java

@@ -19,6 +19,7 @@ import org.thoughtcrime.securesms.logging.Log;
 import org.thoughtcrime.securesms.mms.MediaConstraints;
 import org.thoughtcrime.securesms.providers.BlobProvider;
 import org.thoughtcrime.securesms.recipients.Recipient;
+import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.thoughtcrime.securesms.util.MediaUtil;
 import org.thoughtcrime.securesms.util.SingleLiveEvent;
 import org.thoughtcrime.securesms.util.TextSecurePreferences;
@@ -187,9 +188,11 @@ class MediaSendViewModel extends ViewModel {
     buttonState    = (recipient != null) ? ButtonState.SEND : ButtonState.CONTINUE;
 
     if (viewOnceState == ViewOnceState.GONE && viewOnceSupported()) {
-      // TODO[reveal]
+      if (FeatureFlags.VIEW_ONCE_SENDING) {
-//      viewOnceState = TextSecurePreferences.isRevealableMessageEnabled(application) ? ViewOnceState.ENABLED : ViewOnceState.DISABLED;
+        viewOnceState = TextSecurePreferences.isRevealableMessageEnabled(application) ? ViewOnceState.ENABLED : ViewOnceState.DISABLED;
+      } else {
         viewOnceState = ViewOnceState.GONE;
+      }
     } else if (!viewOnceSupported()) {
       viewOnceState = ViewOnceState.GONE;
     }
@@ -449,8 +452,7 @@ class MediaSendViewModel extends ViewModel {
   }
 
   boolean isViewOnce() {
-    // TODO[reveal]
+    return FeatureFlags.VIEW_ONCE_SENDING && viewOnceState == ViewOnceState.ENABLED;
-    return false;
   }
 
   private @NonNull List<Media> getSelectedMediaOrDefault() {
@@ -471,8 +473,7 @@ class MediaSendViewModel extends ViewModel {
   }
 
   private HudState buildHudState() {
-    // TODO[reveal]
+    ViewOnceState updatedViewOnceState  = FeatureFlags.VIEW_ONCE_SENDING ? viewOnceState : ViewOnceState.GONE;
-    ViewOnceState updatedViewOnceState  = ViewOnceState.GONE;
     List<Media>   selectedMedia         = getSelectedMediaOrDefault();
     int           selectionCount        = selectedMedia.size();
     ButtonState   updatedButtonState    = buttonState == ButtonState.COUNT && selectionCount == 0 ? ButtonState.GONE : buttonState;

src/org/thoughtcrime/securesms/stickers/StickerManagementAdapter.java

@@ -16,6 +16,7 @@ import org.thoughtcrime.securesms.R;
 import org.thoughtcrime.securesms.database.model.StickerPackRecord;
 import org.thoughtcrime.securesms.mms.DecryptableStreamUriLoader.DecryptableUri;
 import org.thoughtcrime.securesms.mms.GlideRequests;
+import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.thoughtcrime.securesms.util.adapter.SectionedRecyclerViewAdapter;
 import org.thoughtcrime.securesms.util.adapter.StableIdGenerator;
 
@@ -222,10 +223,11 @@ final class StickerManagementAdapter extends SectionedRecyclerViewAdapter<String
         actionButtonImage.setImageResource(R.drawable.ic_x);
         actionButton.setOnClickListener(v -> eventListener.onStickerPackUninstallClicked(stickerPack.getPackId(), stickerPack.getPackKey()));
 
-        // TODO [Stickers]: Re-enable later
+        if (FeatureFlags.STICKERS_SHARING) {
-//        shareButton.setVisibility(View.VISIBLE);
+          shareButton.setVisibility(View.VISIBLE);
-//        shareButtonImage.setVisibility(View.VISIBLE);
+          shareButtonImage.setVisibility(View.VISIBLE);
-//        shareButton.setOnClickListener(v -> eventListener.onStickerPackShareClicked(stickerPack.getPackId(), stickerPack.getPackKey()));
+          shareButton.setOnClickListener(v -> eventListener.onStickerPackShareClicked(stickerPack.getPackId(), stickerPack.getPackKey()));
+        }
       } else {
         actionButtonImage.setImageResource(R.drawable.ic_arrow_down);
         actionButton.setOnClickListener(v -> eventListener.onStickerPackInstallClicked(stickerPack.getPackId(), stickerPack.getPackKey()));
@@ -235,9 +237,10 @@ final class StickerManagementAdapter extends SectionedRecyclerViewAdapter<String
         shareButton.setOnClickListener(null);
       }
 
-      // TODO [Stickers]: Delete later
+      if (!FeatureFlags.STICKERS_SHARING) {
         shareButton.setVisibility(View.GONE);
         shareButtonImage.setVisibility(View.GONE);
+      }
 
       itemView.setOnClickListener(v -> eventListener.onStickerPackClicked(stickerPack.getPackId(), stickerPack.getPackKey()));
     }

src/org/thoughtcrime/securesms/stickers/StickerPackPreviewActivity.java

@@ -28,6 +28,7 @@ import org.thoughtcrime.securesms.mms.GlideApp;
 import org.thoughtcrime.securesms.stickers.StickerManifest.Sticker;
 import org.thoughtcrime.securesms.util.DynamicNoActionBarTheme;
 import org.thoughtcrime.securesms.util.DynamicTheme;
+import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.thoughtcrime.securesms.util.ThemeUtil;
 import org.thoughtcrime.securesms.util.concurrent.SimpleTask;
 import org.whispersystems.libsignal.util.Pair;
@@ -147,8 +148,9 @@ public final class StickerPackPreviewActivity extends PassphraseRequiredActionBa
       if (manifest.isPresent()) {
         presentManifest(manifest.get().getManifest());
         presentButton(manifest.get().isInstalled());
-        // TODO [Stickers]: Re-enable later
+        if (FeatureFlags.STICKERS_SHARING) {
-//        presentShareButton(manifest.get().isInstalled(), manifest.get().getManifest().getPackId(), manifest.get().getManifest().getPackKey());
+          presentShareButton(manifest.get().isInstalled(), manifest.get().getManifest().getPackId(), manifest.get().getManifest().getPackKey());
+        }
       } else {
         presentError();
       }

src/org/thoughtcrime/securesms/util/FeatureFlags.java

@@ -0,0 +1,13 @@
+package org.thoughtcrime.securesms.util;
+
+/**
+ * A location for constants that allows us to turn features on and off during development.
+ * After a feature has been launched, the flag should be removed.
+ */
+public class FeatureFlags {
+  /** Support for sharing stickers. */
+  public static final boolean STICKERS_SHARING = false;
+
+  /** Send support for view-once photos. */
+  public static final boolean VIEW_ONCE_SENDING = false;
+}