import gradio as gr from groq import Groq import os from PIL import Image, ImageDraw, ImageFont, ImageFilter from datetime import datetime import json import tempfile from typing import List, Dict, Tuple, Optional from dataclasses import dataclass import subprocess import re import random @dataclass class Question: question: str options: List[str] correct_answer: int @dataclass class QuizFeedback: is_correct: bool selected: Optional[str] correct_answer: str class QuizGenerator: def __init__(self, api_key: str): self.client = Groq(api_key=api_key) def generate_questions(self, text: str, num_questions: int) -> List[Question]: """Generate quiz questions using gemma2-9b-it""" prompt = self._create_prompt(text, num_questions) try: response = self.client.chat.completions.create( messages=[ { "role": "system", "content": "You are a quiz generator. Generate multiple choice questions that are clear and focused." }, { "role": "user", "content": prompt } ], model="gemma2-9b-it", temperature=0, max_tokens=6000 ) # Extract content safely content = response.choices[0].message.content if not content: raise ValueError("Empty response content") # Parse and validate questions questions = self._parse_response(content) validated = self._validate_questions(questions, num_questions) # Check if we have exactly the requested number of questions if len(validated) < num_questions: # Generate additional questions if needed additional_needed = num_questions - len(validated) additional_questions = self.generate_questions(text, additional_needed) validated.extend(additional_questions) elif len(validated) > num_questions: # Trim to exact number needed validated = validated[:num_questions] if len(validated) != num_questions: raise ValueError(f"Failed to generate exactly {num_questions} questions") return validated except Exception as e: print(f"Error in generate_questions: {str(e)}") if 'response' in locals(): print("Response content:", content if 'content' in locals() else None) raise QuizGenerationError(f"Failed to generate questions: {str(e)}") def _validate_questions(self, questions: List[Dict], num_questions: int) -> List[Question]: """Validate questions with strict checking and ensure correct number""" validated = [] for q in questions: try: # Skip invalid questions if not isinstance(q, dict): continue # Check required fields if not all(key in q for key in ['question', 'options', 'correct_answer']): continue # Validate options if not isinstance(q['options'], list) or len(q['options']) != 4: continue # Validate correct_answer try: correct_idx = int(q['correct_answer']) if not 0 <= correct_idx <= 3: continue except (ValueError, TypeError): continue # Validate question content if not q['question'].strip() or any(not opt.strip() for opt in q['options']): continue # Create validated Question object validated.append(Question( question=str(q['question']).strip(), options=[str(opt).strip() for opt in q['options']], correct_answer=correct_idx )) except Exception as e: print(f"Validation error: {str(e)}") continue # Stop if we have enough validated questions if len(validated) == num_questions: break return validated def _create_prompt(self, text: str, num_questions: int) -> str: """Create a simple, clear prompt optimized for gemma2-9b-it with emphasis on exact number""" return f"""Create exactly {num_questions} multiple choice questions about this text. Return only the JSON array in this exact format: [ {{ "question": "Write the question here?", "options": [ "First option", "Second option", "Third option", "Fourth option" ], "correct_answer": 0 }} ] Rules: 1. Return only the JSON array 2. Generate exactly {num_questions} questions 3. Each question must have exactly 4 options 4. correct_answer must be 0, 1, 2, or 3 5. No explanations or additional text Text to use: {text.strip()}""" def _parse_response(self, response_text: str) -> List[Dict]: """Parse response with improved error handling""" try: # Clean up the response text cleaned = response_text.strip() # Remove any markdown formatting cleaned = cleaned.replace('```json', '').replace('```', '').strip() # Find the JSON array start = cleaned.find('[') end = cleaned.rfind(']') + 1 if start == -1 or end == 0: raise ValueError("No JSON array found in response") json_str = cleaned[start:end] # Remove any trailing commas before closing brackets json_str = re.sub(r',(\s*})', r'\1', json_str) json_str = re.sub(r',(\s*])', r'\1', json_str) # Try to parse the cleaned JSON try: return json.loads(json_str) except json.JSONDecodeError: # If that fails, try using ast.literal_eval as a fallback import ast return ast.literal_eval(json_str) except Exception as e: print(f"Parse error details: {str(e)}") print(f"Attempted to parse: {response_text}") # Last resort: try to fix the JSON manually try: # Remove any trailing commas and fix newlines fixed = re.sub(r',(\s*[}\]])', r'\1', response_text) fixed = fixed.replace('}\n{', '},{') fixed = fixed.strip() if not fixed.startswith('['): fixed = '[' + fixed if not fixed.endswith(']'): fixed = fixed + ']' return json.loads(fixed) except: raise ValueError(f"Failed to parse response: {str(e)}") def _validate_questions(self, questions: List[Dict], num_questions: int) -> List[Question]: """Validate questions with strict checking""" validated = [] for q in questions[:num_questions]: try: # Skip invalid questions if not isinstance(q, dict): continue # Check required fields if not all(key in q for key in ['question', 'options', 'correct_answer']): continue # Validate options if not isinstance(q['options'], list) or len(q['options']) != 4: continue # Validate correct_answer try: correct_idx = int(q['correct_answer']) if not 0 <= correct_idx <= 3: continue except (ValueError, TypeError): continue # Create validated Question object validated.append(Question( question=str(q['question']).strip(), options=[str(opt).strip() for opt in q['options']], correct_answer=correct_idx )) except Exception as e: print(f"Validation error: {str(e)}") continue return validated def _is_valid_json(self, json_str: str) -> bool: """Check if a string is valid JSON""" try: json.loads(json_str) return True except: return False class FontManager: """Manages font installation and loading for the certificate generator""" @staticmethod def install_fonts(): """Install required fonts if they're not already present""" try: # Install fonts package subprocess.run([ "apt-get", "update", "-y" ], check=True) subprocess.run([ "apt-get", "install", "-y", "fonts-liberation", # Liberation Sans fonts "fontconfig", # Font configuration "fonts-dejavu-core" # DejaVu fonts as fallback ], check=True) # Clear font cache subprocess.run(["fc-cache", "-f"], check=True) print("Fonts installed successfully") except subprocess.CalledProcessError as e: print(f"Warning: Could not install fonts: {e}") except Exception as e: print(f"Warning: Unexpected error installing fonts: {e}") @staticmethod def get_font_paths() -> Dict[str, str]: """Get the paths to the required fonts with multiple fallbacks""" standard_paths = [ "/usr/share/fonts", "/usr/local/share/fonts", "/usr/share/fonts/truetype", "~/.fonts" ] font_paths = { 'regular': None, 'bold': None } # Common font filenames to try fonts_to_try = { 'regular': [ 'LiberationSans-Regular.ttf', 'DejaVuSans.ttf', 'FreeSans.ttf' ], 'bold': [ 'LiberationSans-Bold.ttf', 'DejaVuSans-Bold.ttf', 'FreeSans-Bold.ttf' ] } def find_font(font_name: str) -> Optional[str]: """Search for a font file in standard locations""" for base_path in standard_paths: for root, _, files in os.walk(os.path.expanduser(base_path)): if font_name in files: return os.path.join(root, font_name) return None # Try to find each font for style in ['regular', 'bold']: for font_name in fonts_to_try[style]: font_path = find_font(font_name) if font_path: font_paths[style] = font_path break # If no fonts found, try using fc-match as fallback if not all(font_paths.values()): try: for style in ['regular', 'bold']: if not font_paths[style]: result = subprocess.run( ['fc-match', '-f', '%{file}', 'sans-serif:style=' + style], capture_output=True, text=True ) if result.returncode == 0 and result.stdout.strip(): font_paths[style] = result.stdout.strip() except Exception as e: print(f"Warning: Could not use fc-match to find fonts: {e}") return font_paths class QuizGenerationError(Exception): """Exception raised for errors in quiz generation""" pass class CertificateGenerator: def __init__(self): self.certificate_size = (1200, 800) self.background_color = '#FFFFFF' self.border_color = '#1C1D1F' # Install fonts if needed FontManager.install_fonts() self.font_paths = FontManager.get_font_paths() def _load_fonts(self) -> Dict[str, ImageFont.FreeTypeFont]: """Load fonts with fallbacks""" fonts = {} try: if self.font_paths['regular'] and self.font_paths['bold']: fonts['title'] = ImageFont.truetype(self.font_paths['bold'], 36) fonts['subtitle'] = ImageFont.truetype(self.font_paths['regular'], 14) fonts['text'] = ImageFont.truetype(self.font_paths['regular'], 20) fonts['name'] = ImageFont.truetype(self.font_paths['bold'], 32) else: raise ValueError("No suitable fonts found") except Exception as e: print(f"Font loading error: {e}. Using default font.") default = ImageFont.load_default() fonts = { 'title': default, 'subtitle': default, 'text': default, 'name': default } return fonts def _add_professional_border(self, draw: ImageDraw.Draw): """Add professional border with improved corners""" padding = 40 border_width = 2 corner_radius = 10 # Draw rounded rectangle border x0, y0 = padding, padding x1, y1 = self.certificate_size[0] - padding, self.certificate_size[1] - padding # Draw corners draw.arc((x0, y0, x0 + corner_radius * 2, y0 + corner_radius * 2), 180, 270, '#1C1D1F', border_width) draw.arc((x1 - corner_radius * 2, y0, x1, y0 + corner_radius * 2), 270, 0, '#1C1D1F', border_width) draw.arc((x0, y1 - corner_radius * 2, x0 + corner_radius * 2, y1), 90, 180, '#1C1D1F', border_width) draw.arc((x1 - corner_radius * 2, y1 - corner_radius * 2, x1, y1), 0, 90, '#1C1D1F', border_width) # Draw lines draw.line((x0 + corner_radius, y0, x1 - corner_radius, y0), '#1C1D1F', border_width) # Top draw.line((x0 + corner_radius, y1, x1 - corner_radius, y1), '#1C1D1F', border_width) # Bottom draw.line((x0, y0 + corner_radius, x0, y1 - corner_radius), '#1C1D1F', border_width) # Left draw.line((x1, y0 + corner_radius, x1, y1 - corner_radius), '#1C1D1F', border_width) # Right def _add_content( self, draw: ImageDraw.Draw, fonts: Dict[str, ImageFont.FreeTypeFont], name: str, course_name: str, score: float, y_offset: int = 140 ): """Add content with adjusted vertical positioning""" # Add "CERTIFICATE OF COMPLETION" text draw.text((60, y_offset), "CERTIFICATE OF COMPLETION", font=fonts['subtitle'], fill='#666666') # Add course name (large and bold) course_name = course_name.strip() or "Assessment" draw.text((60, y_offset + 60), course_name, font=fonts['title'], fill='#1C1D1F') # Add instructor info draw.text((60, y_offset + 160), "Instructor", font=fonts['subtitle'], fill='#666666') draw.text((60, y_offset + 190), "CertifyMe AI", font=fonts['text'], fill='#1C1D1F') # Add participant name (large) name = name.strip() or "Participant" draw.text((60, y_offset + 280), name, font=fonts['name'], fill='#1C1D1F') # Add date and score info date_str = datetime.now().strftime("%b. %d, %Y") # Date section draw.text((60, y_offset + 360), "Date", font=fonts['subtitle'], fill='#666666') draw.text((60, y_offset + 390), date_str, font=fonts['text'], fill='#1C1D1F') # Score section draw.text((300, y_offset + 360), "Score", font=fonts['subtitle'], fill='#666666') draw.text((300, y_offset + 390), f"{float(score):.1f}%", font=fonts['text'], fill='#1C1D1F') # Footer section certificate_id = f"Certificate no: {datetime.now().strftime('%Y%m%d')}-{abs(hash(name)) % 10000:04d}" ref_number = f"Reference Number: {abs(hash(name + date_str)) % 10000:04d}" draw.text((60, 720), certificate_id, font=fonts['subtitle'], fill='#666666') draw.text((1140, 720), ref_number, font=fonts['subtitle'], fill='#666666', anchor="ra") def _add_logo(self, certificate: Image.Image, logo_path: str): try: logo = Image.open(logo_path) # Resize logo to appropriate size logo.thumbnail((150, 80)) # Position in top-left corner with padding certificate.paste(logo, (60, 50), mask=logo if 'A' in logo.getbands() else None) except Exception as e: print(f"Error adding logo: {e}") def _add_photo(self, certificate: Image.Image, photo_path: str): """Add a clear circular profile photo in the top-right corner with adjusted position""" try: if not photo_path or not os.path.exists(photo_path): print(f"Photo path does not exist: {photo_path}") return # Open and process photo photo = Image.open(photo_path) # Define size for circular photo size = (120, 120) # Convert to RGB if not already if photo.mode not in ('RGB', 'RGBA'): photo = photo.convert('RGB') # Create high-quality circular mask mask = Image.new('L', size, 0) draw = ImageDraw.Draw(mask) draw.ellipse((0, 0, size[0], size[1]), fill=255) # Resize photo maintaining aspect ratio aspect = photo.width / photo.height if aspect > 1: new_height = size[1] new_width = int(new_height * aspect) else: new_width = size[0] new_height = int(new_width / aspect) photo = photo.resize((new_width, max(new_height, 1)), Image.Resampling.LANCZOS) # Center crop if aspect > 1: left = (new_width - size[0]) // 2 photo = photo.crop((left, 0, left + size[0], size[1])) else: top = (new_height - size[1]) // 2 photo = photo.crop((0, top, size[0], top + size[1])) # Create circular photo output = Image.new('RGBA', size, (0, 0, 0, 0)) output.paste(photo, (0, 0)) output.putalpha(mask) # Adjusted position - moved down from top photo_x = certificate.width - size[0] - 60 # 60px from right photo_y = 50 # Increased from 40 to 50px from top # Add white background circle bg = Image.new('RGBA', size, (255, 255, 255, 255)) certificate.paste(bg, (photo_x, photo_y), mask=mask) # Paste the photo certificate.paste(output, (photo_x, photo_y), mask=output) print(f"Successfully added photo at position ({photo_x}, {photo_y})") except Exception as e: print(f"Error adding photo: {str(e)}") import traceback traceback.print_exc() def generate( self, score: float, name: str, course_name: str, company_logo: Optional[str] = None, participant_photo: Optional[str] = None ) -> str: """Generate certificate with improved photo handling""" try: # Create base certificate certificate = Image.new('RGB', self.certificate_size, self.background_color) draw = ImageDraw.Draw(certificate) # Add border self._add_professional_border(draw) # Load fonts fonts = self._load_fonts() # Add company logo if provided if company_logo and os.path.exists(company_logo): self._add_logo(certificate, company_logo) # Add participant photo if provided if participant_photo: print(f"Processing photo: {participant_photo}") # Debug info self._add_photo(certificate, participant_photo) # Add content self._add_content(draw, fonts, str(name), str(course_name), float(score)) # Save certificate return self._save_certificate(certificate) except Exception as e: print(f"Error generating certificate: {str(e)}") import traceback traceback.print_exc() return None def _create_base_certificate(self) -> Image.Image: """Create base certificate with improved background""" # Create base image certificate = Image.new('RGB', self.certificate_size, self.background_color) # Add subtle gradient background (optional) draw = ImageDraw.Draw(certificate) # Add very subtle grain texture for professional look (optional) width, height = certificate.size for x in range(0, width, 4): for y in range(0, height, 4): if random.random() > 0.5: draw.point((x, y), fill=(250, 250, 250)) return certificate def _save_certificate(self, certificate: Image.Image) -> str: """Save certificate with improved error handling""" try: temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.png') certificate.save(temp_file.name, 'PNG', quality=95) print(f"Certificate saved to: {temp_file.name}") # Debug info return temp_file.name except Exception as e: print(f"Error saving certificate: {str(e)}") return None class QuizApp: def __init__(self, api_key: str): self.quiz_generator = QuizGenerator(api_key) self.certificate_generator = CertificateGenerator() self.current_questions: List[Question] = [] self.logo_path = "Logo.png" self.selected_level = "Basic" # Default level # Map difficulty levels to number of questions self.difficulty_levels = { "Basic": 5, "Intermediate": 10, "Advanced": 20 } # Add fixed content here self.fixed_content = """# Power BI: A Comprehensive Learning Guide ## Introduction to Power BI Power BI represents Microsoft's flagship business intelligence platform, offering a comprehensive suite of tools for data analysis and visualization. This guide will walk you through the essential concepts, from basic data connectivity to advanced implementations, helping you master this powerful platform. ## Understanding Data Connectivity and Management The foundation of any Power BI solution begins with data connectivity. Power BI offers two primary methods for connecting to data sources: Import mode and DirectQuery mode. Import mode loads data directly into Power BI's memory, providing faster performance and offline access capabilities. In contrast, DirectQuery maintains a live connection to your data source, ensuring real-time data access albeit with potentially slower performance due to query execution time. When working with data sources, Power BI supports a vast array of connections including SQL Server databases, Excel spreadsheets, CSV files, web services, and SharePoint lists. Understanding how to effectively use these connections is crucial for building robust solutions. For instance, when working with Excel data, you can import not only basic tables but also Power Pivot Data Models and Power View Reports, providing flexibility in how you structure your data imports. ## Mastering Data Modeling Data modeling in Power BI follows best practices from dimensional modeling, with the star schema being a fundamental concept. In a star schema, you organize your data around a central fact table connected to multiple dimension tables. This structure optimizes query performance and creates clear, intuitive relationships between your data elements. A critical distinction in Power BI modeling is understanding the difference between calculated columns and measures. Calculated columns compute values for each row and store them in memory, making them ideal for values that need to be filtered or grouped. Measures, on the other hand, calculate results at query time based on user interactions, making them perfect for aggregations and complex calculations that need to respond to different filter contexts. ## DAX: The Language of Data Analysis Data Analysis Expressions (DAX) serves as the formula language in Power BI, enabling you to create sophisticated calculations and data analyses. Beginning with basic functions, you'll learn to create fundamental calculations like total sales or year-to-date values. For example, a simple year-to-date sales calculation might look like: ``` YTD Sales = TOTALYTD(SUM(Sales[Amount]), 'Date'[Date]) ``` As you advance, you'll encounter more complex scenarios requiring advanced DAX concepts. Time intelligence functions allow you to create period-over-period comparisons, while context transition helps you navigate between row and filter contexts effectively. Understanding these concepts becomes crucial when building sophisticated financial or sales analysis solutions. ## Advanced Analysis and Visualization Power BI's visualization capabilities extend far beyond basic charts and graphs. The platform offers a rich set of visualization tools, from standard bar and line charts to sophisticated custom visuals available through the marketplace. Learning to choose the right visualization for your data story becomes crucial for effective communication. Consider a sales analysis scenario: you might combine a line chart showing trends over time with a map visualization displaying regional performance, while using drill-through capabilities to provide detailed product-level analysis. These interactive features allow users to explore data naturally, moving from high-level overviews to detailed insights seamlessly. ## Security and Administration Security in Power BI operates at multiple levels. Row-level security (RLS) allows you to control data access at a granular level, ensuring users see only the data they're authorized to view. For example, regional managers might only see sales data for their specific territories, while executive leadership sees all regions. Administration extends beyond security to include workspace management, sharing permissions, and gateway configuration. The Enterprise Gateway facilitates secure data refresh from on-premises sources, while Personal Gateway serves individual users' needs. Understanding these components helps you build a secure and efficient BI environment. ## Performance Optimization and Best Practices Optimizing Power BI solutions requires attention to several key areas. Data model optimization involves choosing the right storage mode, implementing appropriate relationships, and creating efficient measures. Query performance can be enhanced through proper use of variables in DAX, implementing query folding in Power Query, and utilizing aggregations for large datasets. For large-scale implementations, consider incremental refresh strategies to manage data loading efficiently. This might involve setting up refresh windows to load only the most recent data while maintaining historical information in a static form. ## Real-World Implementation Scenarios Practical application of Power BI often involves complex scenarios combining multiple concepts. Consider a financial reporting solution that requires: - Integration with multiple data sources - Implementation of security roles - Automated refresh schedules - Excel integration for detailed analysis Or a sales performance dashboard featuring: - Real-time data tracking - Predictive analytics integration - Mobile optimization - Automated alerting systems These scenarios require combining technical knowledge with business understanding to create effective solutions. ## Conclusion Mastering Power BI requires understanding not just individual components but how they work together to create effective business intelligence solutions. From basic data connectivity through advanced DAX calculations to security implementation, each element plays a crucial role in building robust, scalable BI systems. Regular practice with real-world scenarios helps reinforce these concepts and builds the experience needed to handle complex business requirements effectively. Continue your learning journey by experimenting with different features, challenging yourself with complex scenarios, and staying updated with the platform's evolving capabilities. Remember that effective BI solutions balance technical capability with business needs, creating insights that drive meaningful business decisions.""" def get_certificate_title(self, base_title: str) -> str: """Get certificate title with difficulty level""" return f"{base_title} - {self.selected_level} Level" def generate_questions(self, text: str, num_questions: int) -> Tuple[bool, List[Question]]: """ Generate quiz questions using the QuizGenerator Returns (success, questions) tuple """ try: questions = self.quiz_generator.generate_questions(text, num_questions) self.current_questions = questions return True, questions except Exception as e: print(f"Error generating questions: {e}") return False, [] def calculate_score(self, answers: List[Optional[str]]) -> Tuple[float, bool, List[QuizFeedback]]: """ Calculate the quiz score and generate feedback Returns (score, passed, feedback) tuple """ if not answers or not self.current_questions: return 0, False, [] feedback = [] correct = 0 for question, answer in zip(self.current_questions, answers): if answer is None: feedback.append(QuizFeedback(False, None, question.options[question.correct_answer])) continue try: selected_index = question.options.index(answer) is_correct = selected_index == question.correct_answer if is_correct: correct += 1 feedback.append(QuizFeedback( is_correct, answer, question.options[question.correct_answer] )) except ValueError: feedback.append(QuizFeedback(False, answer, question.options[question.correct_answer])) score = (correct / len(self.current_questions)) * 100 return score, score >= 80, feedback def update_questions(self, text: str, num_questions: int) -> Tuple[gr.update, gr.update, List[gr.update], List[Question], gr.update]: """ Event handler for generating new questions """ if not text.strip(): return ( gr.update(value=""), gr.update(value="⚠️ Please enter some text content to generate questions."), *[gr.update(visible=False, choices=[]) for _ in range(5)], [], gr.update(selected=1) ) success, questions = self.generate_questions(text, num_questions) if not success or not questions: return ( gr.update(value=""), gr.update(value="❌ Failed to generate questions. Please try again."), *[gr.update(visible=False, choices=[]) for _ in range(5)], [], gr.update(selected=1) ) # Create question display questions_html = "# 📝 Assessment Questions\n\n" questions_html += "> Please select one answer for each question.\n\n" # Update radio buttons updates = [] for i, q in enumerate(questions): questions_html += f"### Question {i+1}\n{q.question}\n\n" updates.append(gr.update( visible=True, choices=q.options, value=None, label=f"Select your answer:" )) # Hide unused radio buttons for i in range(len(questions), 5): updates.append(gr.update(visible=False, choices=[])) return ( gr.update(value=questions_html), gr.update(value=""), *updates, questions, gr.update(selected=1) ) def submit_quiz(self, q1: Optional[str], q2: Optional[str], q3: Optional[str], q4: Optional[str], q5: Optional[str], questions: List[Question] ) -> Tuple[gr.update, List[gr.update], float, str, gr.update]: """ Event handler for quiz submission """ answers = [q1, q2, q3, q4, q5][:len(questions)] if not all(a is not None for a in answers): return ( gr.update(value="⚠️ Please answer all questions before submitting."), *[gr.update() for _ in range(5)], 0, "", gr.update(selected=1) ) score, passed, feedback = self.calculate_score(answers) # Create feedback HTML feedback_html = "# Assessment Results\n\n" for i, (q, f) in enumerate(zip(self.current_questions, feedback)): color = "green" if f.is_correct else "red" symbol = "✅" if f.is_correct else "❌" feedback_html += f""" ### Question {i+1} {q.question}
You passed the assessment with a score of {score:.1f}%
Your certificate has been generated.
Your score: {score:.1f}%
You need 80% or higher to pass and receive a certificate.
This assessment evaluates your understanding of Power BI.
Unanswered Questions: {', '.join(map(str, unanswered))}