add missing template_validator.py to fix deployment error

template_validator.py

@@ -0,0 +1,320 @@
+"""
+Template Validator for HuggingFace Space Generator
+
+This module provides comprehensive validation of the space template
+to ensure it contains all required components and valid Python syntax.
+Used during development and before deployment package generation.
+"""
+
+import ast
+from typing import Dict, List, Any
+
+
+def validate_template(template_string: str = None) -> bool:
+    """
+    Comprehensive validation of the space template
+    
+    Args:
+        template_string: The template to validate. If None, imports from space_template.
+    
+    Returns:
+        bool: True if validation passes, raises ValueError if it fails
+    """
+    
+    # Import template if not provided
+    if template_string is None:
+        from space_template import SPACE_TEMPLATE
+        template_string = SPACE_TEMPLATE
+    
+    # Required placeholders that must exist in the template
+    required_placeholders = [
+        'name', 'description', 'system_prompt', 'temperature', 'max_tokens',
+        'model', 'api_key_var', 'theme', 'grounding_urls', 'enable_dynamic_urls', 
+        'enable_file_upload', 'examples', 'language'
+    ]
+    
+    validation_results = {
+        'placeholder_check': {'passed': True, 'missing': [], 'errors': []},
+        'syntax_check': {'passed': True, 'errors': []},
+        'structure_check': {'passed': True, 'errors': []},
+        'import_check': {'passed': True, 'errors': []},
+        'class_check': {'passed': True, 'errors': []},
+        'function_check': {'passed': True, 'errors': []}
+    }
+    
+    # 1. Check for required placeholders
+    print("🔍 Checking placeholders...")
+    missing = []
+    for placeholder in required_placeholders:
+        if f'{{{placeholder}}}' not in template_string:
+            missing.append(placeholder)
+    
+    if missing:
+        validation_results['placeholder_check']['passed'] = False
+        validation_results['placeholder_check']['missing'] = missing
+        validation_results['placeholder_check']['errors'].append(
+            f"Missing required placeholders: {', '.join(missing)}"
+        )
+    else:
+        print("✅ All required placeholders found")
+    
+    # 2. Validate Python syntax with sample values
+    print("🔍 Checking Python syntax...")
+    sample_values = {
+        'name': repr("Test Space"),
+        'description': repr("Test Description"),
+        'system_prompt': repr("You are a helpful assistant."),
+        'temperature': '0.7',
+        'max_tokens': '2000',
+        'model': repr("openai/gpt-4o-mini"),
+        'api_key_var': repr("API_KEY"),
+        'theme': repr("Default"),
+        'grounding_urls': '[]',
+        'enable_dynamic_urls': 'False',
+        'enable_file_upload': 'False',
+        'examples': '[]',
+        'language': repr("English")
+    }
+    
+    # Create test template with sample values
+    test_template = template_string
+    for key, value in sample_values.items():
+        test_template = test_template.replace(f'{{{key}}}', value)
+    
+    try:
+        # Parse the template as Python code
+        ast.parse(test_template)
+        print("✅ Python syntax is valid")
+    except SyntaxError as e:
+        validation_results['syntax_check']['passed'] = False
+        validation_results['syntax_check']['errors'].append(
+            f"Syntax error at line {e.lineno}: {e.msg}"
+        )
+        print(f"❌ Syntax error: {e}")
+    
+    # 3. Check for required imports
+    print("🔍 Checking required imports...")
+    required_imports = [
+        'import gradio as gr',
+        'import requests',
+        'import json',
+        'from datetime import datetime'
+    ]
+    
+    for imp in required_imports:
+        if imp not in template_string:
+            validation_results['import_check']['passed'] = False
+            validation_results['import_check']['errors'].append(f"Missing import: {imp}")
+    
+    if validation_results['import_check']['passed']:
+        print("✅ All required imports present")
+    
+    # 4. Check for required classes
+    print("🔍 Checking required classes...")
+    required_classes = ['ConfigurationManager']  # Only ConfigurationManager is a class in the template
+    
+    for cls in required_classes:
+        if f'class {cls}' not in template_string:
+            validation_results['class_check']['passed'] = False
+            validation_results['class_check']['errors'].append(f"Missing class: {cls}")
+    
+    if validation_results['class_check']['passed']:
+        print("✅ All required classes found")
+    
+    # 5. Check for required functions
+    print("🔍 Checking required functions...")
+    required_functions = [
+        'def respond',  # Main chat response function
+        'def process_file_upload',
+        'def fetch_url_content',
+        'def export_conversation',
+        'def create_interface'
+    ]
+    
+    for func in required_functions:
+        if func not in template_string:
+            validation_results['function_check']['passed'] = False
+            validation_results['function_check']['errors'].append(
+                f"Missing function: {func.replace('def ', '')}"
+            )
+    
+    if validation_results['function_check']['passed']:
+        print("✅ All required functions found")
+    
+    # 6. Structure validation
+    print("🔍 Checking template structure...")
+    
+    # Check for proper configuration section
+    if 'DEFAULT_CONFIG = {' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing DEFAULT_CONFIG dictionary")
+    
+    # Check for Gradio app launch
+    if 'demo.launch()' not in template_string and 'app.launch()' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing Gradio app launch")
+    
+    # Check for main execution block (with double quotes in template)
+    if 'if __name__ == "__main__":' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing main execution block")
+    
+    if validation_results['structure_check']['passed']:
+        print("✅ Template structure is valid")
+    
+    # Generate summary
+    all_passed = all(check['passed'] for check in validation_results.values())
+    
+    if all_passed:
+        print("\n✅ Template validation PASSED - All checks successful!")
+        return True
+    else:
+        print("\n❌ Template validation FAILED:")
+        for check_name, result in validation_results.items():
+            if not result['passed']:
+                print(f"\n  {check_name.replace('_', ' ').title()}:")
+                for error in result['errors']:
+                    print(f"    - {error}")
+                if result.get('missing'):
+                    print(f"    Missing items: {', '.join(result['missing'])}")
+        
+        raise ValueError("Template validation failed. See details above.")
+    
+    return all_passed
+
+
+def validate_silently(template_string: str = None) -> tuple[bool, Dict[str, Any]]:
+    """
+    Silent validation that returns results without printing
+    
+    Args:
+        template_string: The template to validate. If None, imports from space_template.
+    
+    Returns:
+        tuple: (success: bool, results: dict with validation details)
+    """
+    
+    # Import template if not provided
+    if template_string is None:
+        from space_template import SPACE_TEMPLATE
+        template_string = SPACE_TEMPLATE
+    
+    # Required placeholders that must exist in the template
+    required_placeholders = [
+        'name', 'description', 'system_prompt', 'temperature', 'max_tokens',
+        'model', 'api_key_var', 'theme', 'grounding_urls', 'enable_dynamic_urls', 
+        'enable_file_upload', 'examples', 'language'
+    ]
+    
+    validation_results = {
+        'placeholder_check': {'passed': True, 'missing': [], 'errors': []},
+        'syntax_check': {'passed': True, 'errors': []},
+        'structure_check': {'passed': True, 'errors': []},
+        'import_check': {'passed': True, 'errors': []},
+        'class_check': {'passed': True, 'errors': []},
+        'function_check': {'passed': True, 'errors': []}
+    }
+    
+    # 1. Check for required placeholders
+    missing = []
+    for placeholder in required_placeholders:
+        if f'{{{placeholder}}}' not in template_string:
+            missing.append(placeholder)
+    
+    if missing:
+        validation_results['placeholder_check']['passed'] = False
+        validation_results['placeholder_check']['missing'] = missing
+        validation_results['placeholder_check']['errors'].append(
+            f"Missing required placeholders: {', '.join(missing)}"
+        )
+    
+    # 2. Validate Python syntax with sample values
+    sample_values = {
+        'name': repr("Test Space"),
+        'description': repr("Test Description"),
+        'system_prompt': repr("You are a helpful assistant."),
+        'temperature': '0.7',
+        'max_tokens': '2000',
+        'model': repr("openai/gpt-4o-mini"),
+        'api_key_var': repr("API_KEY"),
+        'theme': repr("Default"),
+        'grounding_urls': '[]',
+        'enable_dynamic_urls': 'False',
+        'enable_file_upload': 'False',
+        'examples': '[]',
+        'language': repr("English")
+    }
+    
+    # Create test template with sample values
+    test_template = template_string
+    for key, value in sample_values.items():
+        test_template = test_template.replace(f'{{{key}}}', value)
+    
+    try:
+        # Parse the template as Python code
+        ast.parse(test_template)
+    except SyntaxError as e:
+        validation_results['syntax_check']['passed'] = False
+        validation_results['syntax_check']['errors'].append(
+            f"Syntax error at line {e.lineno}: {e.msg}"
+        )
+    
+    # 3. Check for required imports
+    required_imports = [
+        'import gradio as gr',
+        'import requests',
+        'import json',
+        'from datetime import datetime'
+    ]
+    
+    for imp in required_imports:
+        if imp not in template_string:
+            validation_results['import_check']['passed'] = False
+            validation_results['import_check']['errors'].append(f"Missing import: {imp}")
+    
+    # 4. Check for required classes
+    required_classes = ['ConfigurationManager']
+    
+    for cls in required_classes:
+        if f'class {cls}' not in template_string:
+            validation_results['class_check']['passed'] = False
+            validation_results['class_check']['errors'].append(f"Missing class: {cls}")
+    
+    # 5. Check for required functions
+    required_functions = [
+        'def respond',
+        'def process_file_upload',
+        'def fetch_url_content',
+        'def export_conversation',
+        'def create_interface'
+    ]
+    
+    for func in required_functions:
+        if func not in template_string:
+            validation_results['function_check']['passed'] = False
+            validation_results['function_check']['errors'].append(
+                f"Missing function: {func.replace('def ', '')}"
+            )
+    
+    # 6. Structure validation
+    if 'DEFAULT_CONFIG = {' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing DEFAULT_CONFIG dictionary")
+    
+    if 'demo.launch()' not in template_string and 'app.launch()' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing Gradio app launch")
+    
+    if 'if __name__ == "__main__":' not in template_string:
+        validation_results['structure_check']['passed'] = False
+        validation_results['structure_check']['errors'].append("Missing main execution block")
+    
+    # Generate summary
+    all_passed = all(check['passed'] for check in validation_results.values())
+    
+    return all_passed, validation_results
+
+
+if __name__ == "__main__":
+    # Run validation when module is executed directly
+    validate_template()