fix: fix typo in log message

- Update log message to remove unnecessary punctuation
- Correct typo in log message for failed CMAB data fetch in experiment

Author: muzahidul-opti

Sources/Implementation/DefaultDecisionService.swift

@@ -125,7 +125,7 @@ class DefaultDecisionService: OPTDecisionService {
             case .failure:
                 let info = LogMessage.cmabFetchFailed(experiment.key)
                 self.logger.e(info)
-                reasons.addInfo(info)
+                reasons.addError(info)
                 let nilVariation = VariationDecision(variation: nil, cmabError: true, cmabUUID: nil)
                 return DecisionResponse(result: nilVariation, reasons: reasons)
         }

Sources/Optimizely+Decide/OptimizelyClient+Decide.swift

@@ -297,6 +297,10 @@ extension OptimizelyClient {
             return OptimizelyDecision.errorDecision(key: flagKey, user: user, error: .featureKeyInvalid(flagKey))
         }
 
+        guard flagDecision?.variation != nil else {
+            return OptimizelyDecision.errorDecision(key: flagKey, user: user, reasons: decisionReasons.toReport())
+        }
+        
         let userId = user.userId
         let attributes = user.attributes
         let flagEnabled = flagDecision?.variation?.featureEnabled ?? false

Sources/Optimizely+Decide/OptimizelyDecision.swift

@@ -52,6 +52,16 @@ extension OptimizelyDecision {
                                   reasons: [error.reason])
     }
 
+    static func errorDecision(key: String, user: OptimizelyUserContext, reasons: [String]) -> OptimizelyDecision {
+        return OptimizelyDecision(variationKey: nil,
+                                  enabled: false,
+                                  variables: OptimizelyJSON.createEmpty(),
+                                  ruleKey: nil,
+                                  flagKey: key,
+                                  userContext: user,
+                                  reasons: reasons)
+    }
+    
     var hasFailed: Bool {
         return variationKey == nil
     }

Sources/Utils/LogMessage.swift

@@ -148,7 +148,7 @@ extension LogMessage: CustomStringConvertible {
         case .failedToAssignValue:                                              message = "Value for path could not be assigned to provided type."
         case .valueForKeyNotFound(let key):                                     message = "Value for JSON key (\(key)) not found."
         case .lowPeriodicDownloadInterval:                                      message = "Polling intervals below 30 seconds are not recommended."
-        case .cmabFetchFailed(let key):                                         message = "Failed to fetch CMAB data for experiment: \(key)."
+        case .cmabFetchFailed(let key):                                         message = "Failed to fetch CMAB data for experiment \(key)."
         case .cmabNotSupportedInSyncMode:                                       message = "CMAB is not supported in sync mode."
         }