VoiceMail.java.txt

// Copyright 2004-present Facebook. All Rights Reserved.

package com.facebook.rtc.voicemail;

import javax.inject.Inject;

import java.util.Locale;

import com.facebook.common.util.StringUtil;
import com.facebook.debug.log.BLog;
import com.facebook.http.protocol.SingleMethodRunner;
import com.facebook.inject.AutoBind;
import com.facebook.prefs.shared.FbSharedPreferences;
import com.facebook.prefs.shared.PrefKey;
import com.facebook.rtc.RtcModule;
import com.facebook.rtc.prefs.VoipPrefKeys;
import com.facebook.xconfig.sync.XSyncApiMethodProvider;
import com.facebook.xconfig.sync.XSyncConfigResult;
import com.facebook.xconfig.sync.XSyncParams;
import com.facebook.xconfig.sync.XSyncResult;

import com.google.common.collect.ImmutableMap;

@AutoBind(inModule = RtcModule.class)
public class VoicemailAssetUrlFetcher {

  private XSyncApiMethodProvider mXSyncApiMethodProvider;
  private SingleMethodRunner mSingleMethodRunner;
  private FbSharedPreferences mFbSharedPreferences;

  private static final long CACHE_EXPIRATION_TIME_MS = 3*24*60*60*1000;
  private static final String CONFIG_NAME = "android_messenger_voicemail";
  private static final String LANGUAGE = Locale.getDefault().getLanguage();

  private static final Class<?> TAG = VoicemailAssetUrlFetcher.class;

  @Inject
  public VoicemailAssetUrlFetcher(
      XSyncApiMethodProvider xSyncApiMethodProvider,
      SingleMethodRunner singleMethodRunner,
      FbSharedPreferences fbSharedPreferences) {
    mXSyncApiMethodProvider = xSyncApiMethodProvider;
    mSingleMethodRunner = singleMethodRunner;
    mFbSharedPreferences = fbSharedPreferences;
  }

  public String getOrFetchAssetUrl() {
    String url = getCachedAssetUrl();
    BLog.d("VoicemailHandler", "Cached url: " + url);
    if (url == null) {
      url = fetchAssetUrl();
      BLog.d("VoicemailHandler", "Fetched url: " + url);
    }
    return url;
  }

  private String fetchAssetUrl() {
    // Constructing params for request
    String key = CONFIG_NAME + "!!" + LANGUAGE;
    String val = "";
    ImmutableMap<String, String> map = ImmutableMap.of(key, val);
    XSyncParams xSyncParams = new XSyncParams(map, false);

    try {
      // Making request
      XSyncResult xSyncResult = mSingleMethodRunner.run(mXSyncApiMethodProvider.get(null), xSyncParams);
      // Parsing result
      BLog.d("VoicemailHandler", xSyncResult.configResults.toString());

      XSyncConfigResult xSyncConfigResult = xSyncResult.configResults.get(CONFIG_NAME);
      BLog.d("VoicemailHandler", xSyncConfigResult.settingNamesToValues.toString());

      String url = xSyncConfigResult.settingNamesToValues.get(LANGUAGE);
      if (StringUtil.isEmptyOrNull(url)) {
        return null;
      }
      // Caching result
      mFbSharedPreferences.edit()
          .putString(VoipPrefKeys.VOICEMAIL_ASSET_URL_KEY, url)
          .putLong(VoipPrefKeys.VOICEMAIL_DOWNLOAD_TIME_KEY, System.currentTimeMillis())
          .commit();
      return url;
    } catch (Exception e) {
      BLog.d("VoicemailHandler", e.toString());
      BLog.d(TAG, "Fetching voicemail asset url exception", e);
      return null;
    }
  }

  private String getCachedAssetUrl() {
    String url = mFbSharedPreferences.getString(VoipPrefKeys.VOICEMAIL_ASSET_URL_KEY, null);
    long downloadTime = mFbSharedPreferences.getLong(VoipPrefKeys.VOICEMAIL_DOWNLOAD_TIME_KEY, -1);
    if (System.currentTimeMillis() - downloadTime > CACHE_EXPIRATION_TIME_MS) {
      // Invalidate cache
      mFbSharedPreferences.edit()
          .remove(VoipPrefKeys.VOICEMAIL_DOWNLOAD_TIME_KEY)
          .remove(VoipPrefKeys.VOICEMAIL_ASSET_URL_KEY)
          .commit();
      return null;
    }
    return url;
  }
}