private void UpdateDemographics()

in Kiosk/Views/RealTimeDemo.xaml.cs [273:342]
63 lines of code
11 McCabe index (conditional complexity)

        private void UpdateDemographics(ImageAnalyzer img)
        {
            if (this.lastSimilarPersistedFaceSample != null)
            {
                bool demographicsChanged = false;
                // Update the Visitor collection (either add new entry or update existing)
                foreach (var item in this.lastSimilarPersistedFaceSample)
                {
                    Visitor visitor;
                    Guid persistedFaceId = item.SimilarPersistedFace.PersistedFaceId.GetValueOrDefault();
                    if (this.visitors.TryGetValue(persistedFaceId, out visitor))
                    {
                        visitor.Count++;
                    }
                    else
                    {
                        demographicsChanged = true;

                        visitor = new Visitor { UniqueId = persistedFaceId, Count = 1 };
                        this.visitors.Add(visitor.UniqueId, visitor);
                        this.demographics.Visitors.Add(visitor);

                        // Update the demographics stats. We only do it for new visitors to avoid double counting. 
                        AgeDistribution genderBasedAgeDistribution = null;
                        if (item.Face.FaceAttributes.Gender == Gender.Male)
                        {
                            this.demographics.OverallMaleCount++;
                            genderBasedAgeDistribution = this.demographics.AgeGenderDistribution.MaleDistribution;
                        }
                        else
                        {
                            this.demographics.OverallFemaleCount++;
                            genderBasedAgeDistribution = this.demographics.AgeGenderDistribution.FemaleDistribution;
                        }

                        if (item.Face.FaceAttributes.Age < 16)
                        {
                            genderBasedAgeDistribution.Age0To15++;
                        }
                        else if (item.Face.FaceAttributes.Age < 20)
                        {
                            genderBasedAgeDistribution.Age16To19++;
                        }
                        else if (item.Face.FaceAttributes.Age < 30)
                        {
                            genderBasedAgeDistribution.Age20s++;
                        }
                        else if (item.Face.FaceAttributes.Age < 40)
                        {
                            genderBasedAgeDistribution.Age30s++;
                        }
                        else if (item.Face.FaceAttributes.Age < 50)
                        {
                            genderBasedAgeDistribution.Age40s++;
                        }
                        else
                        {
                            genderBasedAgeDistribution.Age50sAndOlder++;
                        }
                    }
                }

                if (demographicsChanged)
                {
                    this.ageGenderDistributionControl.UpdateData(this.demographics);
                }

                this.overallStatsControl.UpdateData(this.demographics);
            }
        }