Download data automatically

src/GeoTimeZone.DataBuilder/ConsoleOutput.cs

@@ -20,8 +20,6 @@ public static void Stop()
         Console.WriteLine("Finished at: {0}", GetLocalDisplayTime());
         Console.WriteLine("Total elapsed time: {0:hh\\:mm\\:ss\\.fff}", Stopwatch.Elapsed);
         Console.WriteLine();
-        Console.WriteLine("Hit any key to exit.");
-        Console.ReadKey();
     }
 
     public static void WriteMessage(string message)

src/GeoTimeZone.DataBuilder/Program.cs

@@ -1,23 +1,66 @@
+using System.IO.Compression;
+using System.Net.Http;
+using System.Reflection;
+
 namespace GeoTimeZone.DataBuilder;
 
 internal static class Program
 {
-    private static void Main()
+    private static async Task Main()
     {
         ConsoleOutput.Start();
 
-        var projectPath = Path.GetFullPath(".");
-        while (!File.Exists(Path.Combine(projectPath, "GeoTimeZone.sln")))
-        {
-            projectPath = Path.GetFullPath(Path.Combine(projectPath, ".."));
-        }
+        ConsoleOutput.WriteMessage("Downloading Time Zone Boundaries Shapefile");
+        var tempDir = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()[..8]);
+        var filePath = await DownloadDataAsync("2021c", tempDir);
 
-        var shapeFile = Path.Combine(projectPath, "data", "combined-shapefile.shp");
-        var tzShapeReader = new TimeZoneShapeFileReader(shapeFile);
+        ConsoleOutput.WriteMessage("Extracting contents...");
+        ZipFile.ExtractToDirectory(filePath, tempDir);
 
-        var outputPath = Path.Combine(projectPath, "src", "GeoTimeZone");
+        ConsoleOutput.WriteMessage("Processing data...");
+        var shapeFile = Path.Combine(tempDir, "combined-shapefile.shp");
+        var outputPath = Path.Combine(GetSolutionDir(), "src", "GeoTimeZone");
+        var tzShapeReader = new TimeZoneShapeFileReader(shapeFile);
         TimeZoneDataBuilder.CreateGeohashData(tzShapeReader, outputPath);
 
+        ConsoleOutput.WriteMessage("Done!");
         ConsoleOutput.Stop();
     }
+
+    private static async Task<string> DownloadDataAsync(string version, string path)
+    {
+        var url = $"https://github.com/evansiroky/timezone-boundary-builder/releases/download/{version}/timezones.shapefile.zip";
+
+        if (!Directory.Exists(path))
+        {
+            Directory.CreateDirectory(path);
+        }
+
+        var filename = url[(url.LastIndexOf('/') + 1)..];
+        var httpClient = new HttpClient();
+        using var result = await httpClient.GetAsync(url);
+        if (!result.IsSuccessStatusCode)
+        {
+            ConsoleOutput.WriteMessage($"Error downloading data file: {result.StatusCode}");
+            Environment.Exit(1);
+            return null;
+        }
+
+        var filePath = Path.Combine(path, filename);
+        await using var fs = File.Create(filePath);
+        await result.Content.CopyToAsync(fs);
+
+        return filePath;
+    }
+
+    private static string GetSolutionDir()
+    {
+        var solutionDir = Assembly.GetExecutingAssembly().Location;
+        while (!File.Exists(Path.Combine(solutionDir, "GeoTimeZone.sln")))
+        {
+            solutionDir = Path.GetFullPath(Path.Combine(solutionDir, ".."));
+        }
+
+        return solutionDir;
+    }
 }

src/GeoTimeZone.DataBuilder/TimeZoneDataBuilder.cs

@@ -192,8 +192,6 @@ public static void CreateGeohashData(TimeZoneShapeFileReader inputShapefile, str
 
         WriteLookup(outputPath);
         ConsoleOutput.WriteMessage("Lookup file written.");
-
-        ConsoleOutput.WriteMessage("Done!");
     }
 
     private static void PreLoadTimeZones(IEnumerable<TimeZoneFeature> features)