Replace safeFilename with sha1

Author: kean

ios/Sources/GutenbergKit/Sources/Extensions/String+Extensions.swift

@@ -0,0 +1,23 @@
+import Foundation
+import CryptoKit
+
+extension String {
+    /// Calculates SHA1 from the given string and returns its hex representation.
+      ///
+      /// ```swift
+      /// print("http://test.com".sha1)
+      /// // prints "50334ee0b51600df6397ce93ceed4728c37fee4e"
+      /// ```
+      var sha1: String {
+          guard let input = self.data(using: .utf8) else {
+              assertionFailure("Failed to generate data for the string")
+              return "" // The conversion to .utf8 should never fail
+          }
+          let digest = Insecure.SHA1.hash(data: input)
+          var output = ""
+          for byte in digest {
+              output.append(String(format: "%02x", byte))
+          }
+          return output
+      }
+}

ios/Sources/GutenbergKit/Sources/Helpers/String+SafeDirectoryName.swift

@@ -44,7 +44,7 @@ actor EditorService {
 
         self.storeURL = URL.applicationDirectory
             .appendingPathComponent("GutenbergKit", isDirectory: true)
-            .appendingPathComponent(siteURL.safeFilename, isDirectory: true)
+            .appendingPathComponent(siteURL.sha1, isDirectory: true)
     }
 
     /// Set up the editor for the given site.
@@ -356,10 +356,7 @@ actor EditorService {
 
     /// Generates a cached filename from an asset URL using SHA256 hash
     private func cachedFilename(for urlString: String) -> String {
-        let hash = SHA256.hash(data: Data(urlString.utf8))
-            .compactMap { String(format: "%02x", $0) }
-            .joined()
-
+        let hash = urlString.sha1
         // Preserve file extension if present
         if let url = URL(string: urlString) {
             let ext = url.pathExtension

ios/Sources/GutenbergKit/Sources/Service/EditorService.swift

@@ -61,7 +61,7 @@ public final class HTMLPreviewManager: ObservableObject {
         // for caching purposes. This way, if you make any changes to the template,
         // it will automatically invaliate the previous caches.
         let template = makePatternHTML(content: "", viewportWidth: 0, editorStyles: gutenbergCSS, themeStyles: themeStyles)
-        self.templateHash = template.sha256
+        self.templateHash = template.sha1
 
         self.urlCache = HTMLPreviewManager.makeCache()
     }
@@ -247,7 +247,7 @@ public final class HTMLPreviewManager: ObservableObject {
 // MARK: - Private Helper Functions
 
 private func makeDiskCacheKey(content: String, viewportWidth: Int, templateHash: String) -> String {
-    "\(content)-\(viewportWidth)-\(templateHash)".sha256
+    "\(content)-\(viewportWidth)-\(templateHash)".sha1
 }
 
 /// Creates the HTML for rendering the pattern preview.
@@ -324,11 +324,3 @@ private func encode(_ image: UIImage) -> Data? {
     return data as Data
 }
 
-private extension String {
-    /// Creates a SHA256 hash of the string
-    var sha256: String {
-        let data = Data(self.utf8)
-        let hash = SHA256.hash(data: data)
-        return hash.compactMap { String(format: "%02x", $0) }.joined()
-    }
-}