components/proximity_auth/remote_status_update.cc

   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 #include "components/proximity_auth/remote_status_update.h"
   6
   7 #include "base/logging.h"
   8 #include "base/values.h"
   9
  10 namespace {
  11
  12 // The value of the 'type' status update field.
  13 const char kStatusUpdateType[] = "status_update";
  14
  15 // Keys in the serialized RemoteStatusUpdate JSON object.
  16 const char kType[] = "type";
  17 const char kUserPresence[] = "user_presence";
  18 const char kSecureScreenLock[] = "secure_screen_lock";
  19 const char kTrustAgent[] = "trust_agent";
  20
  21 // Values in the serialized RemoteStatusUpdate JSON object.
  22 const char kUserPresent[] = "present";
  23 const char kUserAbsent[] = "absent";
  24 const char kUserPresenceUnknown[] = "unknown";
  25
  26 const char kSecureScreenLockEnabled[] = "enabled";
  27 const char kSecureScreenLockDisabled[] = "disabled";
  28 const char kSecureScreenLockStateUnknown[] = "unknown";
  29
  30 const char kTrustAgentEnabled[] = "enabled";
  31 const char kTrustAgentDisabled[] = "disabled";
  32 const char kTrustAgentUnsupported[] = "unsupported";
  33
  34 }  // namespace
  35
  36 namespace proximity_auth {
  37
  38 // static
  39 scoped_ptr<RemoteStatusUpdate> RemoteStatusUpdate::Deserialize(
  40     const base::DictionaryValue& serialized_value) {
  41   std::string type;
  42   if (!serialized_value.GetString(kType, &type) || type != kStatusUpdateType) {
  43     VLOG(1) << "Unable to parse remote status update: unexpected type. "
  44             << "Expected: '" << kStatusUpdateType << "', "
  45             << "Saw: '" << type << "'.";
  46     return scoped_ptr<RemoteStatusUpdate>();
  47   }
  48
  49   std::string user_presence, secure_screen_lock_state, trust_agent_state;
  50   if (!serialized_value.GetString(kUserPresence, &user_presence) ||
  51       !serialized_value.GetString(kSecureScreenLock,
  52                                   &secure_screen_lock_state) ||
  53       !serialized_value.GetString(kTrustAgent, &trust_agent_state)) {
  54     VLOG(1) << "Unable to parse remote status update: missing data value. "
  55             << "Status update:\n" << serialized_value;
  56     return scoped_ptr<RemoteStatusUpdate>();
  57   }
  58
  59   scoped_ptr<RemoteStatusUpdate> parsed_update(new RemoteStatusUpdate);
  60   if (user_presence == kUserPresent) {
  61     parsed_update->user_presence = USER_PRESENT;
  62   } else if (user_presence == kUserAbsent) {
  63     parsed_update->user_presence = USER_ABSENT;
  64   } else if (user_presence == kUserPresenceUnknown) {
  65     parsed_update->user_presence = USER_PRESENCE_UNKNOWN;
  66   } else {
  67     VLOG(1) << "Unable to parse remote status update: invalid user presence: '"
  68             << user_presence << "'.";
  69     return scoped_ptr<RemoteStatusUpdate>();
  70   }
  71
  72   if (secure_screen_lock_state == kSecureScreenLockEnabled) {
  73     parsed_update->secure_screen_lock_state = SECURE_SCREEN_LOCK_ENABLED;
  74   } else if (secure_screen_lock_state == kSecureScreenLockDisabled) {
  75     parsed_update->secure_screen_lock_state = SECURE_SCREEN_LOCK_DISABLED;
  76   } else if (secure_screen_lock_state == kSecureScreenLockStateUnknown) {
  77     parsed_update->secure_screen_lock_state = SECURE_SCREEN_LOCK_STATE_UNKNOWN;
  78   } else {
  79     VLOG(1) << "Unable to parse remote status update: invalid secure screen "
  80             << "lock state: '" << secure_screen_lock_state << "'.";
  81     return scoped_ptr<RemoteStatusUpdate>();
  82   }
  83
  84   if (trust_agent_state == kTrustAgentEnabled) {
  85     parsed_update->trust_agent_state = TRUST_AGENT_ENABLED;
  86   } else if (trust_agent_state == kTrustAgentDisabled) {
  87     parsed_update->trust_agent_state = TRUST_AGENT_DISABLED;
  88   } else if (trust_agent_state == kTrustAgentUnsupported) {
  89     parsed_update->trust_agent_state = TRUST_AGENT_UNSUPPORTED;
  90   } else {
  91     VLOG(1) << "Unable to parse remote status update: invalid trust agent "
  92             << "state: '" << trust_agent_state << "'.";
  93     return scoped_ptr<RemoteStatusUpdate>();
  94   }
  95
  96   return parsed_update.Pass();
  97 }
  98
  99 }  // namespace proximity_auth