public DiseaseSearchResultViewModel GetSearchResult(IEnumerable<string> selectedSymptomsIdsAsString, DiseaseTargetType targetGroup)
{
var selectedSymptomsSet = new HashSet<Symptom>();
var relatedDiseasesSet = new HashSet<Disease>();
this.BuildDiseasesList(selectedSymptomsIdsAsString, selectedSymptomsSet, relatedDiseasesSet, targetGroup);
var result = this.BuildSearchResultList(selectedSymptomsSet, relatedDiseasesSet);
return result;
}
public ActionResult SearchResult(IEnumerable<string> selectedSymptomsNames, DiseaseTargetType TargetGroup)
{
var selectedSymptomsIds = this.Symptoms.GetSymptomsIdsByNames(selectedSymptomsNames);
this.Symptoms.AddToLastSearches(selectedSymptomsIds, TargetGroup);
var cacheKey = this.GetCacheKeyFromSymptomsList(selectedSymptomsIds, TargetGroup);
var model = this.Cache.Get(
cacheKey,
() => this.Diseases.GetSearchResult(selectedSymptomsIds, TargetGroup),
20 * 60);
return this.View(model);
}
public void BuildDiseasesList(
IEnumerable<string> selectedSymptomsIdsAsString,
HashSet<Symptom> selectedSymptomsSet,
HashSet<Disease> relatedDiseasesSet,
DiseaseTargetType targetGroup)
{
foreach (var selectedSymptomIdAsString in selectedSymptomsIdsAsString)
{
// TODO: Validation if string can be parsed
var selectedSymptomId = int.Parse(selectedSymptomIdAsString);
var symptom = this.Symptoms.All()
.Include(x => x.Diseases)
.FirstOrDefault(x => x.SymptomId == selectedSymptomId);
if (symptom != null && symptom.Diseases.Count > 0)
{
if (!selectedSymptomsSet.Contains(symptom))
{
selectedSymptomsSet.Add(symptom);
}
foreach (var disease in symptom.Diseases)
{
if (targetGroup.Equals(DiseaseTargetType.Both) || disease.Target.Equals(targetGroup))
{
if (!relatedDiseasesSet.Contains(disease))
{
relatedDiseasesSet.Add(disease);
}
}
}
}
}
}
public void AddToLastSearches(IEnumerable<string> selectedSymptomsIds, DiseaseTargetType targetGroup)
{
var lastSearches = this.Cache.Get(
ServicesConstants.SymptomsLastSearchedCacheKey,
() => { return new List<SearchViewModel>(); },
24 * 60 * 60);
var search = new SearchViewModel()
{
SearchedOn = DateTime.UtcNow,
TargetGroup = targetGroup,
SymptomsSearched = new List<SymptomViewModel>()
};
foreach (var selectedSymptomIdAsString in selectedSymptomsIds)
{
var selectedSymptomId = int.Parse(selectedSymptomIdAsString);
var symptom = this.Symptoms.All().SingleOrDefault(x => x.SymptomId == selectedSymptomId);
var symptomViewModel = this.Mapper.Map<SymptomViewModel>(symptom);
search.SymptomsSearched.Add(symptomViewModel);
}
// If the search has valid symptoms &
// If the same item does not exist in the list
// Insert the search request
if (search.SymptomsSearchedIds.Count > 0 &&
!lastSearches.Contains(search, new SearchViewModelEqualityComparer()))
{
lastSearches.Add(search);
if (lastSearches.Count > 10)
{
var itemToRemove = lastSearches.FirstOrDefault();
lastSearches.Remove(itemToRemove);
}
}
}
public string GetCacheKeyFromSymptomsList(IEnumerable<string> selectedSymptomsIds, DiseaseTargetType TargetGroup)
{
var cacheKeyBuilder = new StringBuilder();
cacheKeyBuilder.Append(TargetGroup.GetDisplayName());
selectedSymptomsIds = selectedSymptomsIds.OrderBy(x => x);
foreach (var symptomId in selectedSymptomsIds)
{
cacheKeyBuilder.Append(symptomId);
cacheKeyBuilder.Append('/');
}
return cacheKeyBuilder.ToString();
}
