1 // Copyright (C) 2013 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 // 15 // The interface to be implemented by the user of the library to enable 16 // downloading validation rules from a server. 17 18 #ifndef I18N_ADDRESSINPUT_DOWNLOADER_H_ 19 #define I18N_ADDRESSINPUT_DOWNLOADER_H_ 20 21 #include <libaddressinput/callback.h> 22 23 #include <string> 24 25 namespace i18n { 26 namespace addressinput { 27 28 // Downloads validation rules from the server. Sample usage: 29 // class MyDownloader : public Downloader { 30 // public: 31 // virtual void Download(const std::string& url, 32 // const Callback& downloaded) const { 33 // bool success = ... 34 // std::string data = ... 35 // downloaded(success, url, data); 36 // } 37 // }; 38 class Downloader { 39 public: 40 typedef i18n::addressinput::Callback<std::string, std::string> Callback; 41 42 virtual ~Downloader() {} 43 44 // Downloads |url| and invokes the |downloaded| callback. 45 virtual void Download(const std::string& url, 46 const Callback& downloaded) const = 0; 47 }; 48 49 } // namespace addressinput 50 } // namespace i18n 51 52 #endif // I18N_ADDRESSINPUT_DOWNLOADER_H_ 53
