Factor Chrome details out of update manifest fetching.

chrome/browser/extensions/updater/manifest_fetch_data.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_EXTENSIONS_UPDATER_MANIFEST_FETCH_DATA_H_
-#define CHROME_BROWSER_EXTENSIONS_UPDATER_MANIFEST_FETCH_DATA_H_
-
-#include <map>
-#include <set>
-#include <string>
-
-#include "base/basictypes.h"
-#include "url/gurl.h"
-
-namespace extensions {
-
-// To save on server resources we can request updates for multiple extensions
-// in one manifest check. This class helps us keep track of the id's for a
-// given fetch, building up the actual URL, and what if anything to include
-// in the ping parameter.
-class ManifestFetchData {
- public:
-  static const int kNeverPinged = -1;
-
-  // Each ping type is sent at most once per day.
-  enum PingType {
-    // Used for counting total installs of an extension/app/theme.
-    ROLLCALL,
-
-    // Used for counting number of active users of an app, where "active" means
-    // the app was launched at least once since the last active ping.
-    ACTIVE,
-  };
-
-  struct PingData {
-    // The number of days it's been since our last rollcall or active ping,
-    // respectively. These are calculated based on the start of day from the
-    // server's perspective.
-    int rollcall_days;
-    int active_days;
-    // Wether the extension is enabled or not.
-    bool is_enabled;
-
-    PingData() : rollcall_days(0), active_days(0), is_enabled(true) {}
-    PingData(int rollcall, int active, bool enabled)
-        : rollcall_days(rollcall), active_days(active), is_enabled(enabled) {}
-  };
-
-  ManifestFetchData(const GURL& update_url, int request_id);
-  ~ManifestFetchData();
-
-  // Returns true if this extension information was successfully added. If the
-  // return value is false it means the full_url would have become too long, and
-  // this ManifestFetchData object remains unchanged.
-  bool AddExtension(const std::string& id,
-                    const std::string& version,
-                    const PingData* ping_data,
-                    const std::string& update_url_data,
-                    const std::string& install_source);
-
-  const GURL& base_url() const { return base_url_; }
-  const GURL& full_url() const { return full_url_; }
-  const std::set<std::string>& extension_ids() const { return extension_ids_; }
-  const std::set<int>& request_ids() const { return request_ids_; }
-
-  // Returns true if the given id is included in this manifest fetch.
-  bool Includes(const std::string& extension_id) const;
-
-  // Returns true if a ping parameter for |type| was added to full_url for this
-  // extension id.
-  bool DidPing(const std::string& extension_id, PingType type) const;
-
-  // Assuming that both this ManifestFetchData and |other| have the same
-  // full_url, this method merges the other information associated with the
-  // fetch (in particular this adds all request ids associated with |other|
-  // to this ManifestFetchData).
-  void Merge(const ManifestFetchData& other);
-
- private:
-  // The set of extension id's for this ManifestFetchData.
-  std::set<std::string> extension_ids_;
-
-  // The set of ping data we actually sent.
-  std::map<std::string, PingData> pings_;
-
-  // The base update url without any arguments added.
-  GURL base_url_;
-
-  // The base update url plus arguments indicating the id, version, etc.
-  // information about each extension.
-  GURL full_url_;
-
-  // The set of request ids associated with this manifest fetch. If multiple
-  // requests are trying to fetch the same manifest, they can be merged into
-  // one fetch, so potentially multiple request ids can get associated with
-  // one ManifestFetchData.
-  std::set<int> request_ids_;
-
-  DISALLOW_COPY_AND_ASSIGN(ManifestFetchData);
-};
-
-}  // namespace extensions
-
-#endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_MANIFEST_FETCH_DATA_H_