Switch to ExifDirectory from Property

Shared/Models/Stateless/Methods/MetaBase.cs

@@ -0,0 +1,83 @@
+using System.Collections.ObjectModel;
+
+namespace View_by_Distance.Shared.Models.Stateless.Methods;
+
+internal static class MetaBase
+{
+
+    internal static string? GetMaker(ExifDirectoryBase[]? exifBaseDirectories)
+    {
+        string? result = null;
+        if (exifBaseDirectories is not null)
+        {
+            string value;
+            foreach (ExifDirectoryBase exifDirectoryBase in exifBaseDirectories)
+            {
+                value = exifDirectoryBase?.Make is null ? string.Empty : exifDirectoryBase.Make.ToString().Trim();
+                if (string.IsNullOrEmpty(value))
+                    result = null;
+                else
+                {
+                    result = $"{value[0].ToString().ToUpper()}{value[1..].ToLower()}";
+                    break;
+                }
+            }
+        }
+        return result;
+    }
+
+    internal static string? GetModel(ExifDirectoryBase[]? exifBaseDirectories)
+    {
+        string? result = null;
+        if (exifBaseDirectories is not null)
+        {
+            string value;
+            foreach (ExifDirectoryBase exifDirectoryBase in exifBaseDirectories)
+            {
+                value = exifDirectoryBase?.Model is null ? string.Empty : exifDirectoryBase.Model.ToString().Trim();
+                if (string.IsNullOrEmpty(value))
+                    result = null;
+                else
+                {
+                    result = value;
+                    break;
+                }
+            }
+        }
+        return result;
+    }
+
+    internal static int? GetOrientation(ExifDirectoryBase[]? exifBaseDirectories)
+    {
+        int? result = null;
+        // public const int TagOrientation = 274;
+        if (exifBaseDirectories is not null)
+        {
+            foreach (ExifDirectoryBase exifDirectoryBase in exifBaseDirectories)
+            {
+                result = exifDirectoryBase?.OrientationValue;
+                if (result is not null)
+                    break;
+            }
+        }
+        return result;
+    }
+
+    internal static ReadOnlyCollection<string> GetKeywords(ExifDirectoryBase[]? exifBaseDirectories)
+    {
+        List<string> results = [];
+        if (exifBaseDirectories is not null)
+        {
+            string value;
+            foreach (ExifDirectoryBase exifDirectoryBase in exifBaseDirectories)
+            {
+                value = exifDirectoryBase?.WinKeywords is null ? string.Empty : exifDirectoryBase.WinKeywords.ToString().Trim();
+                if (string.IsNullOrEmpty(value))
+                    continue;
+                results.Add(value);
+            }
+        }
+        return results.AsReadOnly();
+    }
+
+}