Feat: Show diff view before uploading to Gist (#508)

fix_sync_diff.py

@@ -0,0 +1,52 @@
+import re
+
+path = 'src/sync.ts'
+with open(path, 'r') as f:
+    content = f.read()
+
+# Add a new private method to handle showing the diff
+new_diff_method = """
+    private async showDiff(file: File, remoteContent: string) {
+        const local = vscode.Uri.file(file.filePath);
+        const remote = vscode.Uri.file(file.filePath + ".remote");
+        await G.fs.writeFile(remote.fsPath, remoteContent);
+
+        await vscode.commands.executeCommand(
+            "vscode.diff",
+            remote,
+            local,
+            `Gist ↔ Local`
+        );
+    }
+"""
+
+# Inject the method into the class
+content = content.replace('public async Upload()', f'{new_diff_method}\\n\\n    public async Upload()')
+
+# Modify the Upload method to call this new diff logic
+# I will find the part where it prepares the files and insert my logic
+upload_logic_search = r"const files = await this.GetFiles();"
+upload_logic_replace = r"""
+        const files = await this.GetFiles();
+
+        const remoteContent = await this.GetGist();
+        if (remoteContent) {
+            for (const file of files) {
+                if (remoteContent.data.files[file.gistName]) {
+                    const remoteFileContent = remoteContent.data.files[file.gistName].content;
+                    if (file.content !== remoteFileContent) {
+                        await this.showDiff(file, remoteFileContent);
+                    }
+                }
+            }
+        }
+
+"""
+
+content = content.replace(upload_logic_search, upload_logic_search + upload_logic_replace)
+
+
+with open(path, 'w') as f:
+    f.write(content)
+
+print("Injected diff logic into src/sync.ts")