1 files changed, 103 insertions, 0 deletions
diff --git a/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/AssetsProcessor.java b/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/AssetsProcessor.java
new file mode 100644
index 0000000..1cbd5cb
--- /dev/null
+++ b/bundle2installable/src/java/com/android/tools/appbundle/bundle2installable/AssetsProcessor.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.tools.appbundle.bundle2installable;
+
+import static com.android.tools.appbundle.bundle2installable.util.PathUtils.getFilePathWithoutTopLevel;
+import static com.android.tools.appbundle.bundle2installable.util.PathUtils.getFilePathWithoutVariant;
+
+import com.android.tools.appbundle.bundle2installable.util.Pair;
+import com.android.tools.appbundle.bundle2installable.util.PathUtils;
+import com.android.tools.appbundle.bundle2installable.util.ZipWalker;
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+/**
+ * Assets directory variant processor.
+ *
+ * Currently, scans the directory in the assets directory of the module zip. Every directory name
+ * is considered a variant name, and the final split will contain files from the variant directory
+ * with that directory elided: all goes directly in the assets directory. Each variant will include
+ * files that are directly in the assets root directory.
+ */
+public class AssetsProcessor implements ZipWalker.ZipEntryListener, VariantProcessor {
+
+  private static final String ASSETS_DIR = "assets";
+
+  private Map<String, List<ZipEntry>> variantAssetsMap;
+  private List<ZipEntry> nonVariantAssets;
+
+  public AssetsProcessor() {
+    this.variantAssetsMap = new HashMap<>();
+    this.nonVariantAssets = new ArrayList<>();
+  }
+
+  public void notify(ZipFile bundle, ZipEntry entry) throws IOException {
+    // TODO(b/64285122): fix the asset variants detection when there is only non-variant data.
+    Path p = Paths.get(entry.getName());
+    if (PathUtils.isInsideTopDirectory(p, ASSETS_DIR)) {
+      String variant = PathUtils.resolveVariant(p);
+      if (variant != null) { // inside the variant directory
+        if (!variantAssetsMap.containsKey(variant)) {
+          variantAssetsMap.put(variant, new ArrayList<>());
+        }
+        variantAssetsMap.get(variant).add(entry);
+      } else { // inside the assets directory
+        System.out.println("Entry name: " + entry.getName());
+        if (!entry.isDirectory()) {
+          System.out.println("..is not a directory");
+          nonVariantAssets.add(entry);
+        }
+      }
+    }
+  }
+
+  public List<Pair<ZipEntry, String>> generateForVariant(String variant) {
+    List<Pair<ZipEntry, String>> res = new ArrayList<>();
+    Set<String> coveredFiles = new HashSet<>();
+    if (!variantAssetsMap.containsKey(variant)) {
+      System.out.println(
+          String.format("Warning! The '%s' variant has no dedicated assets.",
+              variant));
+    } else {
+      for (ZipEntry entry : variantAssetsMap.get(variant)) {
+        String pathWithoutVariant = getFilePathWithoutVariant(entry.getName());
+        coveredFiles.add(pathWithoutVariant);
+        res.add(Pair.of(entry, Paths.get(ASSETS_DIR, pathWithoutVariant).toString()));
+      }
+    }
+    for (ZipEntry entry : nonVariantAssets) {
+      String pathWithoutVariant = getFilePathWithoutTopLevel(entry.getName());
+      if (!coveredFiles.contains(pathWithoutVariant)) {
+        res.add(Pair.of(entry, Paths.get(ASSETS_DIR, pathWithoutVariant).toString()));
+      }
+    }
+    return res;
+  }
+
+  public List<String> getAllVariants() {
+    return new ArrayList<>(variantAssetsMap.keySet());
+  }
+}