Updates

modules/valid_invalid_numbers.py

@@ -1,48 +1,210 @@
-# modules/valid_invalid_numbers.py
+import streamlit as st
+import importlib
+import os
+from fpdf import FPDF
+import uuid
 
-title = "Validity of Numbers in Bases"
-description = "This module helps determine the validity of numbers in different bases like binary, octal, decimal, and hexadecimal."
+# Initialize session state variables
+if 'session_id' not in st.session_state:
+    st.session_state.session_id = str(uuid.uuid4())
 
-def generate_question():
-    import random
-    
-    base = random.choice([2, 8, 10, 16])
-    length = random.randint(3, 5)
-    
-    def generate_valid_number():
-        return ''.join([str(random.randint(0, base - 1)) for _ in range(length)])
-    
-    def generate_invalid_number():
-        valid_digits = ''.join([str(random.randint(0, base - 1)) for _ in range(length - 1)])
-        if base < 10:
-            invalid_digit = str(random.randint(base, 9))  # For bases < 10, pick an invalid digit from [base, 9]
-        else:
-            invalid_digit = random.choice('ABCDEF')  # For bases >= 10, pick a hex digit to make it invalid
-        return valid_digits + invalid_digit
+if 'questions' not in st.session_state:
+    st.session_state.questions = []
+if 'current_index' not in st.session_state:
+    st.session_state.current_index = 0
+if 'current_module' not in st.session_state:
+    st.session_state.current_module = None
+if 'correct_count' not in st.session_state:
+    st.session_state.correct_count = 0
+if 'module_correct_count' not in st.session_state:
+    st.session_state.module_correct_count = {}
+if 'module_question_count' not in st.session_state:
+    st.session_state.module_question_count = {}
+if 'pdf_data' not in st.session_state:
+    st.session_state.pdf_data = None
+if 'submit_disabled' not in st.session_state:
+    st.session_state.submit_disabled = True
+if 'next_disabled' not in st.session_state:
+    st.session_state.next_disabled = True
 
-    correct_answer = generate_invalid_number()
-    options = [correct_answer]
+def reset_pdf_cache():
+    st.session_state.pdf_data = None
 
-    # Generate valid options
-    while len(options) < 4:
-        valid_option = generate_valid_number()
-        if valid_option not in options:
-            options.append(valid_option)
+def generate_pdf_report():
+    pdf = FPDF()
+    pdf.add_page()
+    pdf.set_font("Arial", size=12)
     
-    random.shuffle(options)
-    
-    question = f"Which of the following is an invalid number in base {base}?"
-    explanation = f"The number {correct_answer} is invalid in base {base} because it contains a digit outside the range 0-{base-1}."
-    step_by_step_solution = [
-        "Step 1: Identify the valid digits for the base.",
-        "Step 2: Check each option to see if it contains any invalid digits.",
-        "Step 3: The correct answer will have a digit that is not allowed in the specified base."
-    ]
+    pdf.cell(200, 10, txt="Quiz Report", ln=True, align="C")
+    pdf.ln(10)
+
+    for module, data in st.session_state.module_question_count.items():
+        correct_count = st.session_state.module_correct_count.get(module, 0)
+        total_count = data
+        pdf.cell(200, 10, txt=f"Module: {module}", ln=True, align="L")
+        pdf.ln(5)
+        pdf.cell(200, 10, txt=f"Correct Answers: {correct_count}/{total_count}", ln=True, align="L")
+        pdf.ln(5)
+
+        for entry in st.session_state.questions:
+            if entry['module'] == module:
+                question, options, selected, correct, explanation, step_by_step_solution = (
+                    entry['question'], 
+                    entry['options'], 
+                    entry['selected'] if entry['selected'] is not None else "Not Answered",
+                    entry['correct_answer'], 
+                    entry['explanation'],
+                    entry['step_by_step_solution']
+                )
+                pdf.multi_cell(0, 10, f"Q: {question}")
+                for option in options:
+                    if option == correct:
+                        pdf.set_text_color(0, 128, 0)  # Green for correct
+                        pdf.multi_cell(0, 10, f"{option}")
+                    elif option == selected:
+                        pdf.set_text_color(255, 0, 0)  # Red for incorrect
+                        pdf.multi_cell(0, 10, f"{option}")
+                    else:
+                        pdf.set_text_color(0, 0, 0)  # Default color for others
+                        pdf.multi_cell(0, 10, f"   {option}")
+                pdf.set_text_color(0, 0, 0)  # Reset color
+                pdf.multi_cell(0, 10, f"Explanation: {explanation}")
+                pdf.ln(5)
+                pdf.multi_cell(0, 10, "Step-by-Step Solution:")
+                for step in step_by_step_solution:
+                    pdf.multi_cell(0, 10, step)
+                pdf.ln(10)
+
+        pdf.ln(10)  # Add space after each module
+
+    return pdf.output(dest='S').encode('latin1', 'replace')
+
+def load_modules():
+    modules = {}
+    module_dir = "modules"
+    for filename in os.listdir(module_dir):
+        if filename.endswith(".py") and filename != "__init__.py":
+            module_name = filename[:-3]
+            module = importlib.import_module(f"{module_dir}.{module_name}")
+            modules[module_name] = {
+                "title": getattr(module, "title", module_name),
+                "description": getattr(module, "description", "No description available."),
+                "generate_question": module.generate_question
+            }
+    return modules
+
+def generate_new_question(module_name, module):
+    question_data = module['generate_question']()
+    # Ensure 'answered' is initialized to False and add the 'module' and 'selected' keys
+    question_data['answered'] = False
+    question_data['module'] = module_name  # Add the module name to the question data
+    question_data['selected'] = None  # Initialize 'selected' to None
+    # Ensure there are exactly 4 options
+    if len(question_data['options']) != 4:
+        st.warning(f"Question in module '{module_name}' does not have 4 options. Found {len(question_data['options'])}.")
+    return question_data
+
+def navigate_question(direction):
+    if direction == "prev" and st.session_state.current_index > 0:
+        st.session_state.current_index -= 1
+    elif direction == "next":
+        new_question = generate_new_question(st.session_state.current_module, modules[st.session_state.current_module])
+        st.session_state.questions.append(new_question)
+        st.session_state.current_index = len(st.session_state.questions) - 1
+
+# Load all modules dynamically
+modules = load_modules()
+
+# Streamlit interface
+st.sidebar.title("Quiz Modules")
+module_name = st.sidebar.radio("Choose a module:", [modules[module]["title"] for module in modules], index=0)
+
+selected_module = None
+for module in modules:
+    if modules[module]["title"] == module_name:
+        selected_module = module
+        break
+
+if selected_module != st.session_state.current_module:
+    st.session_state.current_module = selected_module
+    st.session_state.current_index = 0
+    st.session_state.questions = [generate_new_question(selected_module, modules[selected_module])]
+    st.session_state.module_question_count[selected_module] = 0
+    st.session_state.module_correct_count[selected_module] = 0
+    st.session_state.submit_disabled = True
+    st.session_state.next_disabled = True
+
+# Load the current module's question
+current_question = st.session_state.questions[st.session_state.current_index]
+
+# Display module title and description
+st.title(modules[selected_module]["title"])
+st.write(modules[selected_module]["description"])
+
+# Navigation and PDF report buttons
+col1, col2, col3 = st.columns([1, 1, 2])
+with col1:
+    if st.button("⬅️ Prev", disabled=st.session_state.current_index == 0):
+        navigate_question("prev")
+with col2:
+    if st.button("➡️ Next", disabled=st.session_state.next_disabled):
+        st.session_state.submit_disabled = True
+        st.session_state.next_disabled = True
+        navigate_question("next")
+with col3:
+    if len(st.session_state.questions) > 0:
+        pdf = generate_pdf_report()
+        st.session_state.pdf_data = pdf  # Reset PDF cache
+        st.download_button(
+            label="Download PDF Report 📄",
+            data=st.session_state.pdf_data,
+            file_name="quiz_report.pdf",
+            mime="application/pdf"
+        )
+
+st.write(current_question["question"])
+
+# Use a form to prevent rerun on option selection
+with st.form(key=f'question_form_{st.session_state.current_index}'):
+    selected_answer = st.radio(
+        "Choose an answer:", 
+        options=current_question['options'], 
+        key=f"question_{st.session_state.current_index}_options",
+        index=None  # No pre-selection
+    )
+    submit_button = st.form_submit_button(label="Submit", disabled=st.session_state.submit_disabled)
+
+if selected_answer and st.session_state.submit_disabled:
+    st.session_state.submit_disabled = False
+
+if submit_button and not current_question.get('answered', False):
+    if selected_answer is None:
+        st.warning("Please select an answer before submitting.")
+    else:
+        # Process the answer
+        current_question['selected'] = selected_answer
+        current_question['answered'] = True
+        st.session_state.module_question_count[selected_module] += 1
+
+        if selected_answer == current_question['correct_answer']:
+            st.session_state.correct_count += 1
+            st.session_state.module_correct_count[selected_module] += 1
+
+        st.session_state.submit_disabled = True
+        st.session_state.next_disabled = False
+
+# Show correct/incorrect feedback after submission
+if current_question.get('answered', False):
+    for option in current_question['options']:
+        if option == current_question['correct_answer']:
+            st.markdown(f"<span style='color:green;'>{option} ✅</span>", unsafe_allow_html=True)
+        elif option == current_question['selected']:
+            st.markdown(f"<span style='color:red;'>{option} ❌</span>", unsafe_allow_html=True)
+        else:
+            st.markdown(f"{option}")
     
-    return {
-        "question": question,
-        "options": options,
-        "correct_answer": correct_answer,
-        "explanation": explanation,
-        "step_by_step_solution": step_by_step_solution
-    }
+    # Show explanation and step-by-step solution
+    st.write(f"**Explanation:** {current_question['explanation']}")
+    st.write("**Step-by-Step Solution:**")
+    for step in current_question['step_by_step_solution']:
+        st.write(step)