Remove LegacySupport class

This was meant to provide an upgrade path from the old app. It's
been almost a year now, this class is no longer needed.

Change-Id: I17c82e5877b275c5ceb3caefa28066abc170f095
diff --git a/src/org/lineageos/updater/UpdatesActivity.java b/src/org/lineageos/updater/UpdatesActivity.java
index 593065a..6b44885 100644
--- a/src/org/lineageos/updater/UpdatesActivity.java
+++ b/src/org/lineageos/updater/UpdatesActivity.java
@@ -55,7 +55,6 @@
 import org.lineageos.updater.download.DownloadClient;
 import org.lineageos.updater.misc.BuildInfoUtils;
 import org.lineageos.updater.misc.Constants;
-import org.lineageos.updater.misc.LegacySupport;
 import org.lineageos.updater.misc.StringGenerator;
 import org.lineageos.updater.misc.Utils;
 import org.lineageos.updater.model.UpdateInfo;
@@ -243,20 +242,11 @@
         boolean newUpdates = false;
 
         List<UpdateInfo> updates = Utils.parseJson(jsonFile, true);
-
-        List<String> importedNotAvailableOnline = LegacySupport.importDownloads(this, updates);
-
         List<String> updatesOnline = new ArrayList<>();
         for (UpdateInfo update : updates) {
             newUpdates |= controller.addUpdate(update);
             updatesOnline.add(update.getDownloadId());
         }
-
-        if (importedNotAvailableOnline != null) {
-            updatesOnline.removeAll(importedNotAvailableOnline);
-            controller.setUpdatesNotAvailableOnline(importedNotAvailableOnline);
-        }
-
         controller.setUpdatesAvailableOnline(updatesOnline, true);
 
         if (manualRefresh) {
diff --git a/src/org/lineageos/updater/misc/LegacySupport.java b/src/org/lineageos/updater/misc/LegacySupport.java
deleted file mode 100644
index 557a56b..0000000
--- a/src/org/lineageos/updater/misc/LegacySupport.java
+++ /dev/null
@@ -1,159 +0,0 @@
-/*
- * Copyright (C) 2017 The LineageOS 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 org.lineageos.updater.misc;
-
-import android.content.Context;
-import android.content.SharedPreferences;
-import android.preference.PreferenceManager;
-import android.util.Log;
-
-import org.lineageos.updater.UpdatesDbHelper;
-import org.lineageos.updater.model.Update;
-import org.lineageos.updater.model.UpdateInfo;
-import org.lineageos.updater.model.UpdateStatus;
-
-import java.io.File;
-import java.text.ParseException;
-import java.text.SimpleDateFormat;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Locale;
-import java.util.Map;
-import java.util.UUID;
-
-public final class LegacySupport {
-
-    private static final String TAG = "LegacySupport";
-
-    private static final String IMPORT_DONE = "import_done";
-
-    private static class IllegalFilenameException extends Exception {
-        IllegalFilenameException(String message) {
-            super(message);
-        }
-    }
-
-    /**
-     * This method imports the updates downloaded with CMUpdater and it adds them to the
-     * updates database. It accepts in input a list of updates which it updates with the
-     * data of matching imported updates (i.e. same filename). If for a given imported
-     * update this method can't find any matching update, it adds a new entry to the
-     * given list.
-     *
-     * @param context
-     * @param updatesJson List of updates to be downloaded
-     * @return A list with the IDs of the imported updates with no matching updates
-     */
-    public static List<String> importDownloads(Context context,
-            List<UpdateInfo> updatesJson) {
-        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(context);
-        if (preferences.getBoolean(IMPORT_DONE, false)) {
-            return null;
-        }
-
-        Log.d(TAG, "Importing downloads");
-
-        List<String> notReplacing = new ArrayList<>();
-        File updatesDir = new File(context.getDataDir(), "app_updates/");
-        if (updatesDir.isDirectory()) {
-            UpdatesDbHelper dbHelper = new UpdatesDbHelper(context);
-            File[] files = updatesDir.listFiles();
-            if (files != null) {
-
-                Map<String, Integer> updatesMap = new HashMap<>();
-                for (UpdateInfo update : updatesJson) {
-                    updatesMap.put(update.getName(), updatesJson.indexOf(update));
-                }
-
-                for (File file : updatesDir.listFiles()) {
-                    if (!file.getName().endsWith(".zip")) {
-                        // Note: there could be complete, but unverified downloads here
-                        Log.d(TAG, "Deleting " + file.getAbsolutePath());
-                        file.delete();
-                    } else {
-                        Log.d(TAG, "Importing " + file.getAbsolutePath());
-                        Integer index = updatesMap.get(file.getName());
-                        if (index != null) {
-                            Update update = new Update(updatesJson.get(index));
-                            update.setFile(file);
-                            update.setFileSize(file.length());
-                            update.setStatus(UpdateStatus.DOWNLOADED);
-                            update.setPersistentStatus(UpdateStatus.Persistent.INCOMPLETE);
-                            dbHelper.addUpdate(update);
-                        } else {
-                            try {
-                                Update update = createUpdateFromFile(file);
-                                notReplacing.add(update.getDownloadId());
-                                updatesJson.add(update);
-                                dbHelper.addUpdate(update);
-                            } catch (IllegalFilenameException e) {
-                                Log.e(TAG, "Deleting " + file.getAbsolutePath(), e);
-                                file.delete();
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        preferences.edit().putBoolean(IMPORT_DONE, true).apply();
-        return notReplacing;
-    }
-
-    private static Update createUpdateFromFile(File file) throws IllegalFilenameException {
-        Update update = new Update();
-        update.setDownloadId(UUID.randomUUID().toString());
-        update.setFile(file);
-        update.setFileSize(file.length());
-        String name = file.getName();
-        update.setName(name);
-        update.setTimestamp(getTimestampFromFileName(name));
-        update.setVersion(getVersionFromFileName(name));
-        update.setType(getTypeFromFileName(name));
-        update.setPersistentStatus(UpdateStatus.Persistent.INCOMPLETE);
-
-        return update;
-    }
-
-    private static long getTimestampFromFileName(String fileName) throws IllegalFilenameException {
-        String[] subStrings = fileName.split("-");
-        if (subStrings.length < 3 || subStrings[2].length() < 8) {
-            throw new  IllegalArgumentException("The given filename is not valid");
-        }
-        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
-        try {
-            return (dateFormat.parse(subStrings[2]).getTime() / 1000);
-        } catch (ParseException e) {
-            throw new IllegalFilenameException("The given filename is not valid");
-        }
-    }
-
-    private static String getVersionFromFileName(String fileName) throws IllegalFilenameException {
-        String[] subStrings = fileName.split("-");
-        if (subStrings.length < 2 || subStrings[1].length() < 4) {
-            throw new IllegalFilenameException("The given filename is not valid");
-        }
-        return subStrings[1];
-    }
-
-    private static String getTypeFromFileName(String fileName) throws IllegalFilenameException {
-        String[] subStrings = fileName.split("-");
-        if (subStrings.length < 4 || subStrings[3].length() < 7) {
-            throw new IllegalFilenameException("The given filename is not valid");
-        }
-        return subStrings[3].toLowerCase(Locale.ROOT);
-    }
-}