#748 - Implement methods for processing various media types and prepa… (#772)

* #748 - Implement methods for processing various media types and preparing them for upload

* Various tweaks following code review:
- added blurhash generation
- changed thumbnails to jpeg
- throwing if file size cannot be retrieved
- move MediaProvider files to separate folder so they can cleanly be imported in the NSE
- added audio file processing
- switched all image resizing methods to ImageIO
- various renames

* Fix blurhash formatting issues, `swift-format-ignore-file` doesn't work

* Processing all media within unique folders to avoid conflicts

* Fix various warnings

* Rename `sizeForItemAt(_ url: URL)` to `sizeForItem(at url: URL)`

* Remove unnecessary resizeImage(UIImage) method, start by copying not moving the file to the unique location

* Add back warning for roomDetails.avatarURL

ElementX/Sources/Other/Extensions/FileManager.swift

@@ -16,6 +16,10 @@
 
 import Foundation
 
+enum FileManagerError: Error {
+    case invalidFileSize
+}
+
 extension FileManager {
     func directoryExists(at url: URL) -> Bool {
         var isDirectory: ObjCBool = false
@@ -32,7 +36,7 @@ extension FileManager {
         try createDirectory(at: url, withIntermediateDirectories: withIntermediateDirectories)
     }
     
-    func copyFileToTemporaryDirectory(url: URL) throws -> URL {
+    func copyFileToTemporaryDirectory(file url: URL) throws -> URL {
         let newURL = URL.temporaryDirectory.appendingPathComponent(url.lastPathComponent)
         
         try? removeItem(at: newURL)
@@ -48,4 +52,17 @@ extension FileManager {
         
         return newURL
     }
+    
+    /// Retrieve a file's disk size
+    /// - Parameter url: the file URL
+    /// - Returns: the size in bytes
+    func sizeForItem(at url: URL) throws -> Double {
+        let attributes = try attributesOfItem(atPath: url.path())
+        
+        guard let size = attributes[FileAttributeKey.size] as? Double else {
+            throw FileManagerError.invalidFileSize
+        }
+        
+        return size
+    }
 }