Merge pull request ResearchKit#120 from dephillipsmichael/feature/external_id

feature/external_id

Author: Erin-Mounts

APCAppCore/APCAppCore/DataSubstrate/Model/APCUser.h

@@ -61,6 +61,7 @@ typedef NS_ENUM(NSInteger, APCUserConsentSharingScope) {
 @property (nonatomic, strong) NSString * email;
 @property (nonatomic, strong) NSString * password;
 @property (nonatomic, strong) NSString * sessionToken;
+@property (nonatomic, strong) NSString * externalId;
 @property (nonatomic) NSString * subpopulationGuid;
 
 /*********************************************************************************/

APCAppCore/APCAppCore/DataSubstrate/Model/APCUser.m

@@ -51,6 +51,7 @@
 static NSString *const kEmailPropertyName = @"email";
 static NSString *const kPasswordPropertyName = @"password";
 static NSString *const kSessionTokenPropertyName = @"sessionToken";
+static NSString *const kExternalIdPropertyName = @"externalId";
 
 static NSString *const kSharedOptionSelection = @"sharedOptionSelection";
 static NSString *const kTaskCompletion = @"taskCompletion";
@@ -274,6 +275,16 @@ -(void)setPassword:(NSString *)password
     [APCKeychainStore setString:[self hashIfNeeded:password] forKey:kPasswordPropertyName];
 }
 
+- (NSString *)externalId
+{
+    return [APCKeychainStore stringForKey:kExternalIdPropertyName];
+}
+
+-(void)setExternalId:(NSString *)externalId
+{
+    [APCKeychainStore setString:externalId forKey:kExternalIdPropertyName];
+}
+
 - (NSString*) hashIfNeeded: (NSString*) password
 {
     //TODO: Implement hashing method