components/copresence/copresence_state_impl.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_COPRESENCE_COPRESENCE_STATE_IMPL_H_
   6 #define COMPONENTS_COPRESENCE_COPRESENCE_STATE_IMPL_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/macros.h"
  13 #include "base/observer_list.h"
  14 #include "components/copresence/proto/enums.pb.h"
  15 #include "components/copresence/public/copresence_state.h"
  16
  17 namespace copresence {
  18
  19 class Directive;
  20 struct ReceivedToken;
  21 struct TransmittedToken;
  22
  23 // This class tracks the internal state of the copresence component
  24 // for debugging purposes. CopresenceState only allows observation,
  25 // but this class accepts updates from elsewhere in the component.
  26 class CopresenceStateImpl final : public CopresenceState {
  27  public:
  28   CopresenceStateImpl();
  29   ~CopresenceStateImpl() override;
  30
  31   // CopresenceState overrides.
  32   void AddObserver(CopresenceObserver* observer) override;
  33   void RemoveObserver(CopresenceObserver* observer) override;
  34   const std::vector<Directive>& active_directives() const override;
  35   const std::map<std::string, TransmittedToken>&
  36   transmitted_tokens() const override;
  37   const std::map<std::string, ReceivedToken>&
  38   received_tokens() const override;
  39
  40   // Update the current active directives.
  41   void UpdateDirectives(const std::vector<Directive>& directives);
  42
  43   // Report transmitting a token.
  44   void UpdateTransmittedToken(const TransmittedToken& token);
  45
  46   // Report receiving a token.
  47   void UpdateReceivedToken(const ReceivedToken& token);
  48
  49   // Report the token state from the server.
  50   void UpdateTokenStatus(const std::string& token_id, TokenStatus status);
  51
  52  private:
  53   // Reconcile the |active_directives_| against |transmitted_tokens_|.
  54   void UpdateTransmittingTokens();
  55
  56   std::vector<Directive> active_directives_;
  57
  58   // TODO(ckehoe): When we support more mediums, separate tokens by medium.
  59   // Otherwise tokens from different mediums could overwrite each other.
  60   // TODO(ckehoe): Limit the number of tokens stored.
  61   std::map<std::string, TransmittedToken> transmitted_tokens_;
  62   std::map<std::string, ReceivedToken> received_tokens_;
  63
  64   base::ObserverList<CopresenceObserver> observers_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(CopresenceStateImpl);
  67 };
  68
  69 }  // namespace copresence
  70
  71 #endif  // COMPONENTS_COPRESENCE_COPRESENCE_STATE_IMPL_H_