public async Task <string> GetResource(string key, string culture, string category, IResourceProvider provider, ILocalStorageService localStorageService)
{
var comparer = StringComparer.OrdinalIgnoreCase;
if (string.IsNullOrWhiteSpace(category) && _options.FallbackCategory != null)
{
category = _options.FallbackCategory;
}
if (_options.MemoryCacheDisabled)
{
var categoryResult = await provider.GetCategoryResources(category, culture);
categoryResult = new Dictionary <string, string>(categoryResult, comparer);
if (categoryResult.TryGetValue(key, out var res))
{
return(res);
}
else
{
await provider.AddMissingKey(category, culture, key);
return(key);
}
}
var categoryKey = $"{category}-{culture}";
await _semaphore.WaitAsync();
var cachedCultureCategory = _cache.SingleOrDefault(x => x.Category == category && x.Culture == culture);
if (cachedCultureCategory == null)
{
if (!_options.LocalStorageOptions.CacheDisabled)
{
var cachedCategory = await localStorageService.GetItemAsync <CultureCategoryResources>(categoryKey);
if (cachedCategory != null)
{
if (cachedCategory.UpdatedTime.Add(_options.LocalStorageOptions.CacheInvalidation) > DateTime.UtcNow)
{
cachedCultureCategory = cachedCategory;
}
}
}
if (cachedCultureCategory == null)
{
cachedCultureCategory = _cache.SingleOrDefault(x => x.Category == category && x.Culture == culture);
if (cachedCultureCategory == null)
{
var resources = await provider.GetCategoryResources(category, culture);
resources = new Dictionary <string, string>(resources, comparer);
cachedCultureCategory = new CultureCategoryResources
{
Category = category,
Culture = culture,
Resources = resources,
UpdatedTime = DateTime.UtcNow
};
_cache.Add(cachedCultureCategory);
if (!_options.LocalStorageOptions.CacheDisabled)
{
await localStorageService.SetItemAsync(categoryKey, cachedCultureCategory);
}
}
}
}
cachedCultureCategory.Resources = new Dictionary <string, string>(cachedCultureCategory.Resources, comparer);
if (cachedCultureCategory.Resources.TryGetValue(key, out var result))
{
_semaphore.Release();
return(result);
}
if (cachedCultureCategory.Resources.TryAdd(key, key))
{
if (!_options.LocalStorageOptions.CacheDisabled)
{
await localStorageService.SetItemAsync(categoryKey, cachedCultureCategory);
}
}
_semaphore.Release();
await provider.AddMissingKey(category, culture, key);
return(key);
}
