chore: organise frontend

frontend/src/components/Home.js

@@ -2,41 +2,25 @@ import React, { useState, useEffect } from 'react';
 import axios from 'axios';
 
 const Home = ({ setSessionId, setQuizStarted }) => {
-  const [files, setFiles] = useState([]); 
-  const [fileNames, setFileNames] = useState(''); 
-  const [settingsOpen, setSettingsOpen] = useState(true); 
-  const [setting1, setSetting1] = useState(false); 
-  const [setting2, setSetting2] = useState(false); 
+  const API_URL = process.env.REACT_APP_API_URL || 'http://localhost:8000';
+
+  // File state
+  const [files, setFiles] = useState([]);
+  const [fileNames, setFileNames] = useState('');
   const [isFileListVisible, setIsFileListVisible] = useState(false);
+
+  // Settings state
+  const [settingsOpen, setSettingsOpen] = useState(true);
+  const [setting1, setSetting1] = useState(false);
+  const [setting2, setSetting2] = useState(false);
   const [quizSettings, setQuizSettings] = useState({
     repeat_on_mistake: false,
     shuffle_answers: false,
     randomise_order: false,
     question_count_multiplier: 1,
   });
-  
-  // Backend API URL - use environment variable or default
-  const API_URL = process.env.REACT_APP_API_URL || 'http://localhost:8000';
-
-  // Add useEffect to handle file list visibility
-  useEffect(() => {
-    if (fileNames) {
-      // Slight delay to ensure smooth transition
-      const timer = setTimeout(() => {
-        setIsFileListVisible(true);
-      }, 50);
-      return () => clearTimeout(timer);
-    } else {
-      setIsFileListVisible(false);
-    }
-  }, [fileNames]);
-
-  const handleFileChange = (e) => {
-    const selectedFiles = Array.from(e.target.files);
-    setFiles(selectedFiles);
-    setFileNames(selectedFiles.map(file => file.name).join(', '));
-  };
 
+  // API functions
   const handleFileUpload = async () => {
     if (files.length === 0) return alert("Please select files");
 
@@ -68,6 +52,13 @@ const Home = ({ setSessionId, setQuizStarted }) => {
     }
   };
 
+  // Event handlers
+  const handleFileChange = (e) => {
+    const selectedFiles = Array.from(e.target.files);
+    setFiles(selectedFiles);
+    setFileNames(selectedFiles.map(file => file.name).join(', '));
+  };
+
   const toggleSettings = () => {
     setSettingsOpen(!settingsOpen);
   };
@@ -84,7 +75,27 @@ const Home = ({ setSessionId, setQuizStarted }) => {
     setQuizSettings({ ...quizSettings, shuffle_answers: newSetting });
   };
 
-  // Main container style with flexbox to position elements side by side
+  const handleRandomizeOrderToggle = () => {
+    setQuizSettings({ ...quizSettings, randomise_order: !quizSettings.randomise_order });
+  };
+
+  const handleQuestionCountChange = (e) => {
+    setQuizSettings({ ...quizSettings, question_count_multiplier: parseInt(e.target.value) });
+  };
+
+  // Effects
+  useEffect(() => {
+    if (fileNames) {
+      const timer = setTimeout(() => {
+        setIsFileListVisible(true);
+      }, 50);
+      return () => clearTimeout(timer);
+    } else {
+      setIsFileListVisible(false);
+    }
+  }, [fileNames]);
+
+  // Styles
   const containerStyle = {
     display: 'flex',
     justifyContent: 'center',
@@ -97,16 +108,14 @@ const Home = ({ setSessionId, setQuizStarted }) => {
     boxSizing: 'border-box',
   };
 
-  // Left side container for quiz setup
   const leftContainerStyle = {
     display: 'flex',
     flexDirection: 'column',
     alignItems: 'center',
     justifyContent: 'center',
-    marginRight: '30px', // Space between left and right containers
+    marginRight: '30px',
   };
 
-  // Right side container for file names with improved fade transition
   const rightContainerStyle = {
     backgroundColor: '#333',
     padding: '20px',
@@ -123,31 +132,6 @@ const Home = ({ setSessionId, setQuizStarted }) => {
     position: 'relative',
   };
 
-  const fileNameHeaderStyle = {
-    fontWeight: 'bold', 
-    marginBottom: '10px',
-    position: 'sticky',
-    top: '0',
-    backgroundColor: '#333',
-    zIndex: 1,
-    paddingBottom: '10px',
-  };
-
-  const fileNamesScrollContainerStyle = {
-    overflowY: 'auto',
-    flexGrow: 1,
-  };
-
-  const fileNamesContainerStyle = {
-    backgroundColor: '#444',
-    borderRadius: '5px', 
-    padding: '10px',
-    marginTop: '10px',
-    fontSize: '0.9em',
-    color: 'white',
-    wordBreak: 'break-all',
-  };
-
   const uploadContainerStyle = {
     backgroundColor: '#333',
     padding: '20px',
@@ -265,6 +249,31 @@ const Home = ({ setSessionId, setQuizStarted }) => {
     marginLeft: '5px',
   };
 
+  const fileNameHeaderStyle = {
+    fontWeight: 'bold', 
+    marginBottom: '10px',
+    position: 'sticky',
+    top: '0',
+    backgroundColor: '#333',
+    zIndex: 1,
+    paddingBottom: '10px',
+  };
+
+  const fileNamesScrollContainerStyle = {
+    overflowY: 'auto',
+    flexGrow: 1,
+  };
+
+  const fileNamesContainerStyle = {
+    backgroundColor: '#444',
+    borderRadius: '5px', 
+    padding: '10px',
+    marginTop: '10px',
+    fontSize: '0.9em',
+    color: 'white',
+    wordBreak: 'break-all',
+  };
+
   return (
     <div style={containerStyle}>
       <div style={leftContainerStyle}>
@@ -284,7 +293,6 @@ const Home = ({ setSessionId, setQuizStarted }) => {
           </button>
         </div>
 
-        {/* Show/Hide Settings Button */}
         <div
           onClick={toggleSettings}
           style={{ 
@@ -297,7 +305,6 @@ const Home = ({ setSessionId, setQuizStarted }) => {
           <span>{settingsOpen ? 'Hide Settings' : 'Show Settings'}</span>
         </div>
 
-        {/* Settings Section */}
         <div style={settingsContainerStyle}>
           <div style={toggleStyle}>
             <span style={settingTextStyle}>Repeat on Mistake</span>
@@ -314,7 +321,7 @@ const Home = ({ setSessionId, setQuizStarted }) => {
           <div style={toggleStyle}>
             <span style={settingTextStyle}>Randomize Order</span>
             <div
-              onClick={() => setQuizSettings({ ...quizSettings, randomise_order: !quizSettings.randomise_order })}
+              onClick={handleRandomizeOrderToggle}
               style={toggleSwitchStyle(quizSettings.randomise_order)}
             >
               <div
@@ -327,16 +334,13 @@ const Home = ({ setSessionId, setQuizStarted }) => {
             <input
               type="number"
               value={quizSettings.question_count_multiplier}
-              onChange={(e) =>
-                setQuizSettings({ ...quizSettings, question_count_multiplier: parseInt(e.target.value) })
-              }
+              onChange={handleQuestionCountChange}
               style={{ ...inputStyle, ...hideSpinnerStyle }}
             />
           </div>
         </div>
       </div>
 
-      {/* Right side container for selected files with improved fade transition */}
       {fileNames && (
         <div style={rightContainerStyle}>
           <div style={fileNameHeaderStyle}>Selected Files:</div>

frontend/src/components/Quiz.js

@@ -3,20 +3,184 @@ import axios from 'axios';
 
 const Quiz = ({ sessionId, onGoHome, onRetry }) => {
     const API_URL = process.env.REACT_APP_API_URL;
+    
+    // Quiz state
     const [questionData, setQuestionData] = useState(null);
-    const [selectedAnswers, setSelectedAnswers] = useState([]);
-    const [userAnswer, setUserAnswer] = useState('');
+    const [quizCompleted, setQuizCompleted] = useState(false);
     const [totalQuestions, setTotalQuestions] = useState(0);
     const [correctAnswerCount, setCorrectAnswersCount] = useState(0);
     const [incorrectAnswersCount, setIncorrectAnswersCount] = useState(0);
+    
+    // Answer state
+    const [selectedAnswers, setSelectedAnswers] = useState([]);
+    const [userAnswer, setUserAnswer] = useState('');
     const [correctAnswers, setCorrectAnswers] = useState('');
-    const [quizCompleted, setQuizCompleted] = useState(false);
-    const [timer, setTimer] = useState(0);
-    const [timerId, setTimerId] = useState(null);
+    
+    // UI state
     const [feedback, setFeedback] = useState('');
     const [isFeedbackVisible, setIsFeedbackVisible] = useState(false);
     const [fadeOut, setFadeOut] = useState(false);
     const [showResults, setShowResults] = useState(false);
+    
+    // Timer state
+    const [timer, setTimer] = useState(0);
+    const [timerId, setTimerId] = useState(null);
+
+    // API functions
+    const fetchQuestion = async () => {
+        try {
+            const response = await axios.get(`${API_URL}/next-question/?session_id=${sessionId}`);
+            console.log("Fetched Question Data:", response.data);
+
+            if (response.data.message === 'Quiz complete!') {
+                setFadeOut(true);
+                setTimeout(() => {
+                    setQuizCompleted(true);
+                    setQuestionData(null);
+                    setTimeout(() => {
+                        setShowResults(true);
+                    }, 100);
+                }, 500);
+            } else {
+                setQuestionData(response.data);
+                setSelectedAnswers([]);
+                setUserAnswer('');
+                setFeedback('');
+                setIsFeedbackVisible(false);
+            }
+        } catch (error) {
+            alert('Error fetching question: ' + (error.response?.data?.error || error.message));
+        }
+    };
+
+    const fetchQuizStats = async () => {
+        try {
+            const response = await axios.get(`${API_URL}/quiz-stats/?session_id=${sessionId}`);
+            setTotalQuestions(response.data.total_questions);
+            setCorrectAnswersCount(response.data.correct_answers);
+            setIncorrectAnswersCount(response.data.incorrect_answers);
+        } catch (error) {
+            console.error('Error fetching quiz stats:', error);
+        }
+    };
+
+    const handleSubmit = async () => {
+        let submissionData;
+        if (questionData.options.length > 1) {
+            submissionData = {
+                session_id: sessionId,
+                selected_answers: selectedAnswers,
+            };
+        } else {
+            submissionData = {
+                session_id: sessionId,
+                selected_answers: [userAnswer.trim()],
+            };
+        }
+    
+        try {
+            const response = await axios.post(`${API_URL}/submit-answer/`, submissionData);
+            const result = response.data.result;
+            setFeedback(result);
+            setIsFeedbackVisible(true);
+    
+            if (result === 'Correct') {
+                fetchQuestion();
+            } else {
+                setCorrectAnswers(response.data.correct_answers.join(', '));
+                await moveQuestionToBottom();
+            }
+    
+            fetchQuizStats();
+        } catch (error) {
+            alert('Error submitting answer: ' + (error.response?.data?.error || error.message));
+        }
+    };
+
+    const moveQuestionToBottom = async () => {
+        try {
+            const questionIndex = questionData.question_index;
+            await axios.post(`${API_URL}/move-question-to-bottom/`, {
+                session_id: sessionId,
+                question_index: questionIndex,
+            });
+        } catch (error) {
+            alert('Error moving question to bottom: ' + (error.response?.data?.error || error.message));
+        }
+    };
+
+    // Event handlers
+    const handleMultipleAnswerChange = (answerText) => {
+        setSelectedAnswers((prev) => {
+            if (prev.includes(answerText)) {
+                return prev.filter((answer) => answer !== answerText);
+            }
+            return [...prev, answerText];
+        });
+    };
+
+    const handleAnswerChange = (answerText) => {
+        setSelectedAnswers([answerText]);
+    };
+
+    const handleUserAnswerChange = (event) => {
+        setUserAnswer(event.target.value);
+    };
+
+    const handleContinueClick = () => {
+        setIsFeedbackVisible(false);
+        setFeedback('');
+        fetchQuestion();
+    };
+
+    const handleKeyPress = (event) => {
+        if (event.key === 'Enter') {
+            if (isFeedbackVisible) {
+                handleContinueClick();
+            } else {
+                const canSubmit = questionData.options.length > 1 
+                    ? selectedAnswers.length > 0 
+                    : userAnswer.trim() !== '';
+                
+                if (canSubmit) {
+                    handleSubmit();
+                }
+            }
+        }
+    };
+
+    // Utility functions
+    const formatTime = (totalSeconds) => {
+        const hours = String(Math.floor(totalSeconds / 3600)).padStart(2, '0');
+        const minutes = String(Math.floor((totalSeconds % 3600) / 60)).padStart(2, '0');
+        const seconds = String(totalSeconds % 60).padStart(2, '0');
+        return `${hours}:${minutes}:${seconds}`;
+    };
+
+    // Effects
+    useEffect(() => {
+        document.addEventListener('keypress', handleKeyPress);
+        return () => {
+            document.removeEventListener('keypress', handleKeyPress);
+        };
+    }, [isFeedbackVisible, selectedAnswers, userAnswer, questionData]);
+
+    useEffect(() => {
+        fetchQuestion();
+        fetchQuizStats();
+        const id = setInterval(() => setTimer((prev) => prev + 1), 1000);
+        setTimerId(id);
+
+        return () => {
+            clearInterval(id);
+        };
+    }, [sessionId]);
+
+    useEffect(() => {
+        if (quizCompleted) {
+            clearInterval(timerId);
+        }
+    }, [quizCompleted, timerId]);
 
     // Styles
     const pageStyle = {
@@ -118,160 +282,7 @@ const Quiz = ({ sessionId, onGoHome, onRetry }) => {
         transition: 'opacity 0.5s ease-out, transform 0.5s ease-out',
     };
 
-    // Keyboard event handler
-    const handleKeyPress = (event) => {
-        if (event.key === 'Enter') {
-            if (isFeedbackVisible) {
-                handleContinueClick();
-            } else {
-                const canSubmit = questionData.options.length > 1 
-                    ? selectedAnswers.length > 0 
-                    : userAnswer.trim() !== '';
-                
-                if (canSubmit) {
-                    handleSubmit();
-                }
-            }
-        }
-    };
-
-    // Event listeners
-    useEffect(() => {
-        document.addEventListener('keypress', handleKeyPress);
-        return () => {
-            document.removeEventListener('keypress', handleKeyPress);
-        };
-    }, [isFeedbackVisible, selectedAnswers, userAnswer, questionData]);
-
-    const fetchQuestion = async () => {
-        try {
-            const response = await axios.get(`${API_URL}/next-question/?session_id=${sessionId}`);
-            console.log("Fetched Question Data:", response.data);
-
-            if (response.data.message === 'Quiz complete!') {
-                setFadeOut(true);
-                setTimeout(() => {
-                    setQuizCompleted(true);
-                    setQuestionData(null);
-                    setTimeout(() => {
-                        setShowResults(true);
-                    }, 100);
-                }, 500);
-            } else {
-                setQuestionData(response.data);
-                setSelectedAnswers([]);
-                setUserAnswer('');
-                setFeedback('');
-                setIsFeedbackVisible(false);
-            }
-        } catch (error) {
-            alert('Error fetching question: ' + (error.response?.data?.error || error.message));
-        }
-    };
-
-    const fetchQuizStats = async () => {
-        try {
-            const response = await axios.get(`${API_URL}/quiz-stats/?session_id=${sessionId}`);
-            setTotalQuestions(response.data.total_questions);
-            setCorrectAnswersCount(response.data.correct_answers);
-            setIncorrectAnswersCount(response.data.incorrect_answers);
-        } catch (error) {
-            console.error('Error fetching quiz stats:', error);
-        }
-    };
-
-    const handleMultipleAnswerChange = (answerText) => {
-        setSelectedAnswers((prev) => {
-            if (prev.includes(answerText)) {
-                return prev.filter((answer) => answer !== answerText);
-            }
-            return [...prev, answerText];
-        });
-    };
-
-    const handleAnswerChange = (answerText) => {
-        setSelectedAnswers([answerText]);
-    };
-
-    const handleUserAnswerChange = (event) => {
-        setUserAnswer(event.target.value);
-    };
-
-    const handleContinueClick = () => {
-        setIsFeedbackVisible(false);
-        setFeedback('');
-        fetchQuestion();
-    };
-
-    const handleSubmit = async () => {
-        let submissionData;
-        if (questionData.options.length > 1) {
-            submissionData = {
-                session_id: sessionId,
-                selected_answers: selectedAnswers,
-            };
-        } else {
-            submissionData = {
-                session_id: sessionId,
-                selected_answers: [userAnswer.trim()],
-            };
-        }
-    
-        try {
-            const response = await axios.post(`${API_URL}/submit-answer/`, submissionData);
-            const result = response.data.result;
-            setFeedback(result);
-            setIsFeedbackVisible(true);
-    
-            if (result === 'Correct') {
-                fetchQuestion();
-            } else {
-                setCorrectAnswers(response.data.correct_answers.join(', '));
-                await moveQuestionToBottom();
-            }
-    
-            fetchQuizStats();
-        } catch (error) {
-            alert('Error submitting answer: ' + (error.response?.data?.error || error.message));
-        }
-    };
-
-    const moveQuestionToBottom = async () => {
-        try {
-            const questionIndex = questionData.question_index;
-            await axios.post(`${API_URL}/move-question-to-bottom/`, {
-                session_id: sessionId,
-                question_index: questionIndex,
-            });
-        } catch (error) {
-            alert('Error moving question to bottom: ' + (error.response?.data?.error || error.message));
-        }
-    };
-
-    useEffect(() => {
-        fetchQuestion();
-        fetchQuizStats();
-        const id = setInterval(() => setTimer((prev) => prev + 1), 1000);
-        setTimerId(id);
-
-        return () => {
-            clearInterval(id);
-        };
-    }, [sessionId]);
-
-    useEffect(() => {
-        if (quizCompleted) {
-            clearInterval(timerId);
-        }
-    }, [quizCompleted, timerId]);
-
-    const formatTime = (totalSeconds) => {
-        const hours = String(Math.floor(totalSeconds / 3600)).padStart(2, '0');
-        const minutes = String(Math.floor((totalSeconds % 3600) / 60)).padStart(2, '0');
-        const seconds = String(totalSeconds % 60).padStart(2, '0');
-        return `${hours}:${minutes}:${seconds}`;
-    };
-
+    // Render quiz completion screen
     if (quizCompleted) {
         const totalAnswered = correctAnswerCount + (totalQuestions - correctAnswerCount);
         const percentageCorrect = totalAnswered > 0 ? (correctAnswerCount / (correctAnswerCount + incorrectAnswersCount)) * 100 : 0;
@@ -306,8 +317,10 @@ const Quiz = ({ sessionId, onGoHome, onRetry }) => {
         );
     }
 
+    // Loading state
     if (!questionData) return <div style={{ color: 'white', textAlign: 'center', paddingTop: '50px' }}>Loading...</div>;
 
+    // Quiz question rendering
     const hasMultipleOptions = questionData.options.length > 1;
     const hasMultipleCorrectAnswers = questionData.multiple_choice;