public WeatherStationDetailViewModel(WeatherStation item = null)
{
Title = "Weather Details: " + item?.StationName;
dateRange = WeatherSet.WeatherSetDateRanges.Today;
Item = item;
RgSets = new RangeObservableCollection <WeatherSet>();
_rgSets = new ObservableCollection <WeatherSet>();
RefreshWeatherSets = new Command(async() => await LoadObservableCollection());
}
//Generates all the prefixes needed for the specific range
private List <string> GeneratePrefixStrings(WeatherSet.WeatherSetDateRanges range)
{
List <string> prefixes = new List <string>();
//Blobs are stroed under utc time
DateTime currentUtcDay = DateTime.UtcNow;
string sLogPrefix;
string testmode = ConfigurationManager.AppSettings["TestMode"];
if (testmode == "true")
{
sLogPrefix = @"test/";
}
else
{
sLogPrefix = @"logs/post/";
}
switch (range)
{
case WeatherSet.WeatherSetDateRanges.Today:
prefixes.Add(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
return(prefixes);
case WeatherSet.WeatherSetDateRanges.PastThreeDays:
for (int i = 0; i < 3; i++)
{
prefixes.Add(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
currentUtcDay.AddDays(-1);
}
return(prefixes);
case WeatherSet.WeatherSetDateRanges.PastWeek:
for (int i = 0; i < 7; i++)
{
prefixes.Add(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
currentUtcDay.AddDays(-1);
}
return(prefixes);
case WeatherSet.WeatherSetDateRanges.ThisMonth:
prefixes.Add(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month);
return(prefixes);
case WeatherSet.WeatherSetDateRanges.ThisYear:
prefixes.Add(sLogPrefix + currentUtcDay.Year);
return(prefixes);
default:
prefixes.Add(sLogPrefix);
return(prefixes);
}
}
public async Task <bool> RefreshWeatherSets(WeatherSet.WeatherSetDateRanges range)
{
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("sensor-hub");
BlobResultSegment seg = await ListBlobsAsync(container, range);
bool succ = await CreateWeatherStationsFromBlob(seg);
// Retrieve reference to a blob named "myblob".
return(await Task.FromResult(true));
}
//Generates all the prefixes needed for the specific range
private List <string> GeneratePrefixStrings(WeatherSet.WeatherSetDateRanges range)
{
List <string> prefixes = new List <string>();
//Blobs are stroed under utc time
DateTime currentUtcDay = DateTime.UtcNow;
string sLogPrefix = @"logs/post/";
switch (range)
{
case WeatherSet.WeatherSetDateRanges.Today:
prefixes.Append(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
return(prefixes);
case WeatherSet.WeatherSetDateRanges.PastThreeDays:
for (int i = 0; i < 3; i++)
{
prefixes.Append(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
currentUtcDay.AddDays(-1);
}
return(prefixes);
case WeatherSet.WeatherSetDateRanges.PastWeek:
for (int i = 0; i < 7; i++)
{
prefixes.Append(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month + "//" + currentUtcDay.Date);
currentUtcDay.AddDays(-1);
}
return(prefixes);
case WeatherSet.WeatherSetDateRanges.ThisMonth:
prefixes.Append(sLogPrefix + currentUtcDay.Year + "//" + currentUtcDay.Month);
return(prefixes);
case WeatherSet.WeatherSetDateRanges.ThisYear:
prefixes.Append(sLogPrefix + currentUtcDay.Year);
return(prefixes);
default:
prefixes.Add(sLogPrefix);
return(prefixes);
}
}
public async Task <BlobResultSegment> ListBlobsAsync(CloudBlobContainer con, WeatherSet.WeatherSetDateRanges range)
{
BlobContinuationToken continuationToken = null;
BlobResultSegment resultSegment = null;
try
{
//Call ListBlobsSegmentedAsync and enumerate the result segment returned, while the continuation token is non-null.
//When the continuation token is null, the last page has been returned and execution can exit the loop.
do
{
//This overload allows control of the page size. You can return all remaining results by passing null for the maxResults parameter,
//or by calling a different overload.
// from: https://hahoangv.wordpress.com/2016/05/16/azure-storage-step-4-blobs-storage-in-action/
List <string> prefixForBlob = GeneratePrefixStrings(WeatherSet.WeatherSetDateRanges.AllTime);
foreach (string prefix in prefixForBlob)
{
if (resultSegment == null)
{
resultSegment = await con.ListBlobsSegmentedAsync(prefix, true, BlobListingDetails.All, 1000, continuationToken, null, null);
}
else
{
BlobResultSegment temp = await con.ListBlobsSegmentedAsync(prefix, true, BlobListingDetails.All, 1000, continuationToken, null, null);
resultSegment.Results.Union(temp.Results);
}
}
Console.WriteLine();
//Get the continuation token.
continuationToken = resultSegment.ContinuationToken;
}while (continuationToken != null);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
return(resultSegment);
}
public async Task <IEnumerable <WeatherStation> > GetAllWeatherSets(bool forceRefresh = false, WeatherSet.WeatherSetDateRanges range = WeatherSet.WeatherSetDateRanges.Today)
{
return(await Task.FromResult(weatherStations));
}
