Add functionality to save set images

Program.cs

@@ -94,6 +94,41 @@ if (args.Length >= 1)
 		Console.WriteLine("File saved.");
 	}
 
+	if (args.Any(a => a.StartsWith("images"))) {
+		var sets = args.First(a => a.StartsWith("images")).Split(":").Skip(1);
+
+		if (sets.Any()) {
+			using var httpClient = new HttpClient();
+
+			foreach (var set in sets) {
+				var setCards = interestedCards.Where(c => c.Set == set).ToList();
+				if (!setCards.Any()) {
+					continue;
+				}
+				Console.WriteLine($"Downloading images from set {set}.");
+				var setImagesPath = Path.Combine("images", set);
+
+				Directory.CreateDirectory(setImagesPath);
+				Console.WriteLine();
+				string cardName = "";
+				foreach (var setCard in setCards) {
+					// TODO this doesn't work
+					Console.Write(new string('\b', cardName.Length));
+					cardName = setCard.Name;
+					Console.Write(cardName);
+					if (!string.IsNullOrWhiteSpace(setCard.ImageUris?.Normal)) {
+						using var stream = httpClient.GetStreamAsync(setCard.ImageUris?.Normal);
+						using var fileStream = new FileStream(Path.Combine(setImagesPath, $"{setCard.Id}.jpg"), FileMode.Create);
+						stream.Result.CopyTo(fileStream);
+						// Add a short delay between image downloads.
+						Thread.Sleep(2000);
+					}
+				}
+				Console.WriteLine($"Card images saved: {setCards.Count}");
+			}
+		}
+	}
+
 
 	var randomCard = interestedCards[new Random().Next(interestedCards.Count)];
 

README.md

@@ -11,6 +11,8 @@ Downloads card images from Scryfall.
 	- Optional arguments:
 		- `sets` to get a listing of sets (identifier, name, and release date)
 		- `save` will save interested cards to a **cards.json** file in the current directory.
+		- `images` will pull and save the normal (JPG) images for the sets listed after, using a `:` separator.
+			- For example, `images:3ed:ice` downloads the 3rd Edition and Ice Age card images.
 
 ## Pending Improvements
 - Allow sets to download to be passed via argument or via configuration.