64 lines
1.9 KiB
C#
64 lines
1.9 KiB
C#
using System;
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using System.IO;
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using System.Text;
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using System.Threading.Tasks;
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namespace SocialWeather
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{
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public class PipeWeatherStreamFormatter : IStreamFormatter<WeatherReport>
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{
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public async Task<WeatherReport> ReadAsync(Stream stream)
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{
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var sr = new StreamReader(stream);
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var line = await sr.ReadLineAsync();
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if (line == null)
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{
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return null;
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}
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var tokens = line.Split('|');
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int temperature;
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long reportTime = long.MinValue;
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Weather weather = (Weather)(-1);
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string zipCode = tokens.Length > 3 ? tokens[3] : string.Empty;
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if(tokens.Length == 0 || !int.TryParse(tokens[0], out temperature))
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{
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temperature = int.MinValue;
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}
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if (tokens.Length < 2 || !long.TryParse(tokens[1], out reportTime))
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{
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temperature = int.MinValue;
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}
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if (tokens.Length < 3 || !Enum.TryParse<Weather>(tokens[2], out weather))
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{
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weather = (Weather)(-1);
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}
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return new WeatherReport
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{
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Temperature = temperature,
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ReportTime = reportTime,
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Weather = weather,
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ZipCode = zipCode
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};
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}
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public async Task WriteAsync(WeatherReport report, Stream stream)
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{
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var sw = new StreamWriter(stream);
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var line = $"{report.Temperature}|{report.ReportTime}|{(int)report.Weather}|{report.ZipCode ?? string.Empty}";
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Encoding utf8 = Encoding.UTF8;
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var encodedBytes = utf8.GetBytes(line);
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var convertedBytes = Encoding.Convert(Encoding.UTF8, Encoding.ASCII, encodedBytes);
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await sw.WriteLineAsync(Encoding.ASCII.GetString(convertedBytes));
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await sw.FlushAsync();
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}
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}
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}
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