Added 3D Preview URL property to CSMScreenshot

Sources/CSFloatKit/Model/CSM/CSMScreenshot.swift

@@ -47,3 +47,22 @@ import Foundation
         self.init(status: status, cached: cached, imageURL: imageURL, previewURL: previewURL, error: error)
     }
 }
+
+extension CSMScreenshot {
+    var preview3D: String? {
+        let regex = "(?:https:\\/\\/s1.cs.money\\/)([A-Za-z0-9_\\-]{7})"
+        guard let imageURL = self.imageURL else {
+            return nil
+        }
+        let idNsRange = NSRange(location: 0, length: imageURL.utf16.count)
+        do {
+            let expression = try NSRegularExpression(pattern: regex)
+            let firstMatch = expression.firstMatch(in: imageURL, options: [], range: idNsRange)
+            guard let nsRange = firstMatch?.range(at: 1),
+                  let range = Range(nsRange, in: imageURL) else { return nil }
+            return "https://3d.cs.money/item/\(imageURL[range])"
+        } catch {
+            return nil
+        }
+    }
+}

Tests/CSFloatKitTests/CSFloatKitTests.swift

@@ -57,4 +57,26 @@ final class CSFloatKitTests: XCTestCase {
             XCTAssertNotNil(screenshot)
         }
     }
+    
+    func testPreview3D() {
+        let exp = expectation(description: "CSM Screenshot")
+        var previewURL: String?
+        guard let config = CSMConfiguration(inspectLink: "steam://rungame/730/76561202255233023/+csgo_econ_action_preview%20S76561199043158336A20517916623D14133434752320963923") else {
+            XCTFail("Invalid inspect link for CSM Service")
+            return
+        }
+        let request = CSMRequester(configuration: config, completion: { (fetchedScreenshot, error) in
+            XCTAssertEqual(error, .noError)
+            XCTAssertNotNil(fetchedScreenshot)
+            guard let actualScreenshot = fetchedScreenshot else { return }
+            previewURL = actualScreenshot.preview3D
+            XCTAssertEqual(previewURL, "https://3d.cs.money/item/TWXUyFZ")
+            exp.fulfill()
+        })
+        request.start()
+        
+        waitForExpectations(timeout: 10) { (error) in
+            XCTAssertNotNil(previewURL)
+        }
+    }
 }