Add codemod script to remove empty usePresenter parameters

scripts/codemods/README.md

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+# Codegen Codemods
+
+This directory contains codemod scripts that can be used to automate code transformations using the Codegen SDK.
+
+## Available Codemods
+
+### Remove Empty usePresenter Parameters
+
+**Script**: `remove_empty_presenter_params.py`
+
+This codemod finds all usages of `usePresenter` where the second argument is an empty object (`{}`) and removes that parameter.
+
+#### Usage
+
+```bash
+# Navigate to your project root
+cd your-project-root
+
+# Run the script
+python scripts/codemods/remove_empty_presenter_params.py
+```
+
+#### What it does
+
+The script:
+
+1. Searches for all function calls to `usePresenter` in your codebase
+1. Identifies calls where the second argument is an empty object (`{}`)
+1. Removes the empty object parameter
+1. Commits the changes to your files
+
+#### Example Transformation
+
+Before:
+
+```javascript
+const presenter = usePresenter(someValue, {});
+```
+
+After:
+
+```javascript
+const presenter = usePresenter(someValue);
+```
+
+#### Configuration
+
+By default, the script is configured for TypeScript/JavaScript codebases. If your project uses a different language, you can modify the language parameter in the script:
+
+```python
+# Change "typescript" to your project's language
+codebase = Codebase("./", language="typescript")
+```

scripts/codemods/remove_empty_presenter_params.py

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+import re
+
+import codegen
+from codegen import Codebase
+
+
+@codegen.function("remove_empty_presenter_params")
+def run(codebase: Codebase):
+    """Find all usages of 'usePresenter' where the second argument is '{}' and remove that parameter.
+
+    This script handles various forms of empty objects:
+    - {}
+    - { }
+    - Object with whitespace
+    """
+    print("🔍 Searching for usePresenter calls with empty object as second parameter...")
+
+    modified_files = 0
+    modified_calls = 0
+
+    # Regular expression to match empty objects with possible whitespace
+    empty_obj_pattern = re.compile(r"^\s*{\s*}\s*$")
+
+    # Iterate through all files in the codebase
+    for file in codebase.files:
+        file_modified = False
+
+        # Look for function calls to usePresenter
+        for call in file.function_calls:
+            if call.name == "usePresenter" and len(call.arguments) >= 2:
+                # Check if the second argument is an empty object {}
+                second_arg = call.arguments[1]
+                if empty_obj_pattern.match(second_arg.source_code):
+                    print(f"🔧 Found usePresenter with empty object in {file.filepath}")
+                    print(f"   Original: {call.source_code}")
+
+                    # Remove the second argument
+                    call.remove_argument(1)
+                    file_modified = True
+                    modified_calls += 1
+
+                    print(f"   Modified: {call.source_code}")
+
+        # Commit changes if the file was modified
+        if file_modified:
+            modified_files += 1
+
+    # Commit all changes
+    if modified_files > 0:
+        codebase.commit()
+        print(f"✅ Modified {modified_calls} usePresenter calls across {modified_files} files")
+    else:
+        print("ℹ️ No usePresenter calls with empty object parameters found")
+
+
+if __name__ == "__main__":
+    print("🚀 Starting script to remove empty usePresenter parameters...")
+
+    # Initialize codebase with the appropriate language
+    # You can change this to match your project's primary language
+    codebase = Codebase("./", language="typescript")
+
+    run(codebase)
+    print("✅ Done! All empty usePresenter parameters have been removed!")