/// <summary>
/// Save all beacons in a log table
/// </summary>
/// <param name="beacon"></param>
private static void SaveInLogTable(BeaconData beacon)
{
var partitionKey = DateTime.Now.ToString("ddMMyyyy");
var item = new BeaconDataStorage {
PartitionKey = partitionKey, RowKey = beacon.Identifier, Timestamp = DateTimeOffset.Now, Data = Newtonsoft.Json.JsonConvert.SerializeObject(beacon)
};
var storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("AzureWebJobsStorage"));
var tableClient = storageAccount.CreateCloudTableClient();
var table = tableClient.GetTableReference("BeaconLogTable");
var operation = TableOperation.InsertOrReplace(item);
table.Execute(operation);
}
private static bool IsAlreadyDiscovered(BeaconData beacon)
{
var storageAccount = CloudStorageAccount.Parse(CloudConfigurationManager.GetSetting("AzureWebJobsStorage"));
var tableClient = storageAccount.CreateCloudTableClient();
var table = tableClient.GetTableReference("BeaconLogTable");
var query = new TableQuery <LocationStorage>()
.Where(
TableQuery.CombineFilters(
TableQuery.GenerateFilterCondition("PartitionKey", QueryComparisons.Equal, DateTimeOffset.Now.ToString("ddMMyyyy")),
TableOperators.And,
TableQuery.GenerateFilterCondition("RowKey", QueryComparisons.Equal, beacon.Identifier)));
var result = table.ExecuteQuery(query);
return(result.Any(x => DateTimeOffset.UtcNow.Subtract(x.Timestamp).Minutes < 5));
}
private static string GetBeaconIdentifier(BeaconData beacon)
{
var result = new StringBuilder();
if (beacon.BeaconType.Equals("ibeacon", StringComparison.InvariantCultureIgnoreCase))
{
result.Append("1!");
result.Append(beacon.IbeaconData.Uuid.ToString("N").ToLower())
.Append(beacon.IbeaconData.MajorHex.ToLower())
.Append(beacon.IbeaconData.MinorHex.ToLower());
}
else if (beacon.BeaconType.Equals("eddystone_uid", StringComparison.InvariantCultureIgnoreCase) && beacon.EddyStoneData != null)
{
result.Append("3!")
.Append(beacon.EddyStoneData.NamespaceId.Replace("0x", ""))
.Append(beacon.EddyStoneData.InstanceId.Replace("0x", ""));
}
return(result.ToString());
}
private static async Task <LocationInfo> GetInfo(TraceWriter log, BeaconData beacon, ExecutionContext context)
{
LogHelper.Log(log, $"GetBeaconIdentifier called: {beacon.Identifier}");
if (string.IsNullOrEmpty(beacon.Identifier))
{
return(null);
}
var path = $"{context.FunctionAppDirectory}\\beacons.csv";
using (TextReader reader = File.OpenText(path))
{
var configuration = new Configuration {
HasHeaderRecord = true,
};
var doubleConverterOptions = new TypeConverterOptions {
CultureInfo = CultureInfo.InvariantCulture
};
var csv = new CsvReader(reader, configuration);
csv.Configuration.TypeConverterOptionsCache.AddOptions <double>(doubleConverterOptions);
await csv.ReadAsync(); // skip first header line
while (await csv.ReadAsync())
{
var name = csv.GetField <string>(0);
if (!string.IsNullOrEmpty(name) && name.Equals(beacon.Identifier, StringComparison.InvariantCultureIgnoreCase))
{
return(new LocationInfo
{
Name = csv.GetField <string>(1),
Coordinates = new GeoCoordinates(csv.GetField <double>(4), csv.GetField <double>(5)),
Beacon = beacon
});
}
}
}
return(null);
}
public static async Task <LocationInfo> Run(
[QueueTrigger("beacon-received-queue", Connection = "AzureWebJobsStorage")] BeaconData beacon,
TraceWriter log,
ExecutionContext context)
{
var info = await GetInfo(log, beacon, context);
if (info != null)
{
info.Address = await GetAddress(info.Coordinates);
info.Date = DateTime.UtcNow;
LogHelper.Log(log, $"ProcessBeaconFunction called: beacon: {Newtonsoft.Json.JsonConvert.SerializeObject(info)}");
return(info);
}
else
{
LogHelper.Log(log, "ProcessBeaconFunction called: unkown beacon");
}
return(null);
}
