ABANDONED: chromeos: Download contacts (work in progress).

chrome/browser/chromeos/contacts/contact_source.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_SOURCE_H_
+#define CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_SOURCE_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+
+namespace contacts {
+
+struct Contact;
+typedef std::vector<const Contact*> ContactPointers;
+class ContactSourceObserver;
+
+// Interface for classes that provide contacts.
+class ContactSource {
+ public:
+  ContactSource() {}
+  virtual ~ContactSource() {}
+
+  // Appends the source's contacts to |contacts_out|.
+  virtual void AppendContacts(ContactPointers* contacts_out) = 0;
+
+  // Returns the contact identified by |provider_id|.
+  // NULL is returned if the contact doesn't exist.
+  virtual const Contact* GetContactByProviderId(
+      const std::string& provider_id) = 0;
+
+  // Adds or removes an observer.
+  virtual void AddObserver(ContactSourceObserver* observer) = 0;
+  virtual void RemoveObserver(ContactSourceObserver* observer) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ContactSource);
+};
+
+}  // namespace contacts
+
+#endif  // CHROME_BROWSER_CHROMEOS_CONTACTS_CONTACT_SOURCE_H_