Add patterned rename and Move to, and keep settings, selection, and queue speed from resetting.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/Explorer.Application.Tests/FilenamePatternTests.cs

@@ -0,0 +1,106 @@
+using Explorer.Application;
+using Explorer.Domain;
+
+namespace Explorer.Application.Tests;
+
+public class FilenamePatternTests
+{
+    [Fact]
+    public void Formats_artist_title_and_dates()
+    {
+        var tags = new MediaTagFields
+        {
+            Artist = "Pink Floyd",
+            Title = "Comfortably Numb",
+            Track = 6,
+            Created = new DateTimeOffset(new DateTime(2024, 8, 26, 12, 0, 0, DateTimeKind.Local)),
+            Stem = "clip",
+            Extension = "mp3",
+            Width = 1920
+        };
+        Assert.Equal(
+            "Pink Floyd - Comfortably Numb",
+            FilenamePattern.Expand("{Artist} - {Title}", tags));
+        Assert.Equal("06", FilenamePattern.Expand("{Track:00}", tags));
+        Assert.Equal("2024-08-26", FilenamePattern.Expand("{CreatedDate}", tags));
+        Assert.Equal("1920_clip", FilenamePattern.Expand("{Width}_{Name}", tags));
+    }
+
+    [Fact]
+    public void Parses_filename_into_tags()
+    {
+        Assert.True(FilenamePattern.TryParse(
+            "{Artist} - {Title}",
+            "AC/DC - Hells Bells",
+            out var tags,
+            out _));
+        Assert.Equal("AC/DC", tags.Artist);
+        Assert.Equal("Hells Bells", tags.Title);
+    }
+
+    [Fact]
+    public void Parse_fails_when_the_name_does_not_match()
+    {
+        Assert.False(FilenamePattern.TryParse("{Artist} - {Title}", "JustOneName", out _, out var error));
+        Assert.Contains("match", error, StringComparison.OrdinalIgnoreCase);
+    }
+
+    [Fact]
+    public void Unknown_tokens_stay_in_the_name()
+    {
+        Assert.Equal("{Foo}_a", FilenamePattern.Expand("{Foo}_{Name}", new MediaTagFields { Stem = "a" }));
+    }
+
+    [Fact]
+    public void Sanitizes_illegal_filename_characters_from_tags()
+    {
+        var name = FilenamePattern.Expand("{Title}", new MediaTagFields { Title = @"a:b/c" });
+        Assert.Equal("a-b-c", name);
+    }
+
+    [Fact]
+    public void Taken_date_and_project_expand()
+    {
+        var tags = new MediaTagFields
+        {
+            Taken = new DateTimeOffset(new DateTime(2024, 8, 26, 15, 30, 0, DateTimeKind.Local)),
+            Created = new DateTimeOffset(new DateTime(2020, 1, 1, 0, 0, 0, DateTimeKind.Local)),
+            Stem = "DSC_001",
+            Project = "Explorer",
+            Parent = "photos"
+        };
+        Assert.Equal("20240826_DSC_001", FilenamePattern.Expand("{TakenDate:yyyyMMdd}_{Name}", tags));
+        Assert.Equal("2024-08-26", FilenamePattern.Expand("{CreatedDate}", tags));
+        Assert.Equal("Explorer_DSC_001", FilenamePattern.Expand("{Project}_{Name}", tags));
+    }
+
+    [Fact]
+    public void Parses_taken_date_from_filename()
+    {
+        Assert.True(FilenamePattern.TryParse(
+            "{TakenDate:yyyyMMdd}_{Name}",
+            "20240826_DSC_001",
+            out var tags,
+            out _));
+        Assert.Equal(2024, tags.Taken?.Year);
+        Assert.Equal(8, tags.Taken?.Month);
+        Assert.Equal(26, tags.Taken?.Day);
+        Assert.Equal(2024, tags.Year);
+    }
+
+    [Fact]
+    public void WithProject_uses_repo_folder_then_parent()
+    {
+        var fields = new MediaTagFields { Parent = "photos" };
+        Assert.Equal("Explorer", FilenamePattern.WithProject(fields, @"C:\src\Explorer").Project);
+        Assert.Equal("photos", FilenamePattern.WithProject(fields, null).Project);
+    }
+
+    [Fact]
+    public void TakenDate_is_media_content_CreatedDate_and_Project_are_not()
+    {
+        Assert.True(FilenamePattern.UsesMediaContent("{TakenDate}_{Name}"));
+        Assert.False(FilenamePattern.UsesMediaContent("{CreatedDate}_{Name}"));
+        Assert.False(FilenamePattern.UsesMediaContent("{Project}_{Name}"));
+    }
+}