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FlowerApp/Data/Constants.cs

@@ -1,19 +1,76 @@
-using SQLite;
+using Microsoft.Extensions.Logging;
+using SQLite;
 
 namespace Blahblah.FlowerApp.Data;
 
-public sealed class Constants
+internal sealed class Constants
 {
     public const string CategoryOther = "other";
     public const string EventUnknown = "unknown";
 
-    public const string BaseUrl = "https://flower.tsanie.org";
+    public const string ApiVersionName = "api_version";
+    public const string LastTokenName = "last_token";
+
+    public const string BaseUrl = "https://app.blahblaho.com";
 
     public const SQLiteOpenFlags SQLiteFlags =
         SQLiteOpenFlags.ReadWrite |
         SQLiteOpenFlags.Create |
         SQLiteOpenFlags.SharedCache;
 
-    private const string dbFilename = "flowerstory.db3";
+    const string dbFilename = "flowerstory.db3";
     public static string DatabasePath => Path.Combine(FileSystem.AppDataDirectory, dbFilename);
+
+    static string? apiVersion;
+    public static string? ApiVersion => apiVersion;
+
+    static string? authorization;
+    public static string? Authorization => authorization;
+
+    public static void SetAuthorization(string auth)
+    {
+        authorization = auth;
+    }
+
+    public static async Task<Definitions?> Initialize(ILogger logger, string? version, CancellationToken cancellation = default)
+    {
+        try
+        {
+            var v = await Extensions.FetchAsync<string>("api/version", cancellation);
+            apiVersion = v;
+
+            if (v != version)
+            {
+                var definition = await Extensions.FetchAsync<Definitions>($"api/consts?{v}", cancellation);
+                return definition;
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.LogError("error occurs on fetching version and definitions, {error}", ex);
+        }
+
+        return null;
+    }
 }
+
+internal record Definitions
+{
+    public required string ApiVersion { get; init; }
+
+    public required Dictionary<int, NamedItem> Categories { get; init; }
+
+    public required Dictionary<int, EventItem> Events { get; init; }
+}
+
+internal record NamedItem(string Name, string? Description)
+{
+    public string Name { get; init; } = Name;
+
+    public string? Description { get; init; } = Description;
+}
+
+internal record EventItem(string Name, string? Description, bool Unique) : NamedItem(Name, Description)
+{
+    public bool Unique { get; init; } = Unique;
+}