Linked correct video to question.

.github/workflows/deploy.yml

@@ -26,7 +26,7 @@ jobs:
     - name: Install and build
       run: |
         yarn install
-        yarn build
+        CI=false yarn build
 
     - name: Upload build artifact
       uses: actions/upload-pages-artifact@v1

backend/api.py

@@ -51,8 +51,13 @@ def ai_mark(request: AIMarkRequest):
     marking_system_prompt = f"""
     You are a marking system for a language learning app. 
     You are marking a question from a chapter on {request.chapter} in {request.language}.
+    
     Please mark the user's answer as correct or incorrect and give a reason for your marking.
-    Output in the following JSON format: {{"correct": bool, "reason": str}}
+    Your marking is primarily based on the user's answer being semantically equivalent, in the given scenario,
+    to the expected answer, rather than identical.
+    Ignore incorrect spacing and capitalisation in your grading.
+    Output in the following JSON format: {{"correct": bool, "reason": str}}.
+    "reason" should always state the expected answer and the user's answer, along with an explanation of the mistake.
     """
     user_prompt = f"""
     The question is: {request.question}

frontend/package.json

@@ -14,6 +14,7 @@
     "react-dom": "^18.2.0",
     "react-router-dom": "^6.20.0",
     "react-scripts": "^5.0.1",
+    "react-spinners": "^0.13.8",
     "sass": "^1.69.5",
     "typescript": "^4.4.2",
     "web-vitals": "^2.1.0"

frontend/src/components/LessonComplete.tsx

@@ -0,0 +1,26 @@
+import DuoSplash from "../assets/img/duo-splash.png";
+import { useNavigate } from "react-router-dom";
+
+interface LessonCompleteProps {
+    home: string;
+  }
+
+export default function LessonComplete({ home } : LessonCompleteProps)
+{
+  const navigate = useNavigate();
+
+  return <div className="flex flex-col justify-center">
+    <div className="flex flex-col p-5 gap-5 items-center">
+      <img src={DuoSplash} alt="Duolingo Logo"></img>
+
+      <h1>Well done!</h1>
+
+      <p className="white">
+        Experience Gained: +100XP
+      </p>
+      <button className="green" onClick={() => navigate(home)}>
+        Continue
+      </button>
+    </div>
+  </div>
+}

frontend/src/components/NavBar.tsx

@@ -1,7 +1,7 @@
 // NavBar.tsx
 import React, { useState, useEffect } from 'react';
 import { useNavigate, useLocation } from 'react-router-dom';
-import { NavItem } from '../components/NavItem';
+import { NavItem } from './NavItem';
 
 export default function NavBar() {
     const navigate = useNavigate();
@@ -18,7 +18,7 @@ export default function NavBar() {
 
     const navItems = [
         { icon: "mdi:book", label: "Courses", path: "/courses" },
-        { icon: "mdi:earth", label: "Collab Learning", path: "/collab-learning" },
+        { icon: "mdi:earth", label: "Chat", path: "/collab-learning" },
         { icon: "mdi:clipboard-text-clock", label: "Review", path: "/review" },
         { icon: "mdi:microphone-message", label: "Speaking", path: "/speaking" },
         { icon: "mdi:account", label: "Profile", path: "/profile" },
@@ -38,4 +38,4 @@ export default function NavBar() {
             ))}
         </nav>
     )
-}
+}

frontend/src/components/VerbalPronunciationExercise.tsx

@@ -0,0 +1,111 @@
+import { useLocation, useNavigate } from 'react-router-dom';
+import { Icon } from '@iconify/react';
+import { useState, useEffect, useRef, useCallback } from 'react';
+import {speechToText, getAIMarking, getLanguage} from '../logic/sdk';
+import ClipLoader from "react-spinners/ClipLoader";
+import {VerbalPronunciation} from "../logic/CourseData";
+
+interface VerbalPronunciationProps {
+    q: VerbalPronunciation;
+    chapter: string;
+    onSubmit: Function;
+  }
+
+export default function VerbalPronunciationExercise({q, chapter, onSubmit}: VerbalPronunciationProps) {
+    const language = getLanguage().name;
+    const [answered, setAnswered] = useState(false);
+    const [loading, setLoading] = useState(false);
+    const [correct, setCorrect] = useState("");
+    const [reason, setReason] = useState("");
+
+    const handleSubmit = () => {
+        if (answered) {
+            setAnswered(false);
+            onSubmit();
+        }
+    }
+
+    const [isRecording, setIsRecording] = useState(false);
+
+    let chunks = [] as any;
+    const mediaRecorder = useRef<MediaRecorder | null>(null);
+
+    useEffect(() => {
+        navigator.mediaDevices.getUserMedia({ audio: true }).then((stream) => {
+            mediaRecorder.current = new MediaRecorder(stream);
+            mediaRecorder.current.ondataavailable = (e) => {
+                chunks.push(e.data);
+            }
+    
+            mediaRecorder.current.onstop = async (e) => {
+                setIsRecording(false);
+                setLoading(true);
+                const blob = new Blob(chunks, { type: 'audio/wav' });
+                chunks = [];
+            
+                const audioFile = new File([blob], "audio.wav", { type: 'audio/wav' });
+            
+                const text = await speechToText(audioFile);
+                const aiMark = await getAIMarking(q.question, text.toLowerCase(), "", chapter, language);
+                setAnswered(true);
+                setCorrect(aiMark.correct);
+                setReason(aiMark.reason);
+            }
+        });
+    }, []);
+
+    const handleRecord = useCallback(() => {
+        if (!isRecording) {
+            if (mediaRecorder.current) {
+                mediaRecorder.current.start();
+            }
+            setIsRecording(true);
+        } else {
+            if (mediaRecorder.current) {
+                mediaRecorder.current.stop();
+            }
+        }
+    }, [isRecording]);
+
+    const ResponseSection = (correct: string | null, reason: string | null) => {
+        if (!answered) {
+            return (
+                <div className='flex backdrop:flex-row justify-center w-full'>
+                    <Icon icon="mdi:microphone" className="microphone h-20 w-20 mx-auto"/>
+                    <button className={`record-btn mx-auto ${isRecording ? 'red' : ''}`} onClick={handleRecord}>
+                        {isRecording ? 'Stop Recording' 
+                        : loading ?  
+                        <ClipLoader
+                            color="white"
+                            loading={loading}
+                            aria-label="Loading Spinner"
+                            data-testid="loader"
+                        /> : 
+                        'Record'}
+                    </button>
+                </div>
+
+            )
+        } else {
+            return (
+                <div className=' flex-row flex-wrap w-full'>
+                    <h3>{correct}</h3>
+                    <p>{reason}</p>
+                    <button className='record-btn w-full bottom-0 relative' onClick={(e) => handleSubmit()}>Continue</button>
+                </div>
+            )
+        }
+    }
+
+    return (
+        <div>
+            <div className="v-layout page-pad flex justify-center">
+                <h1 className="text-center">Say the following</h1>
+                <div className='round box h-min no-shadow relative min-h-[60px] flex items-center justify-center'>
+                    {q.question}
+                </div>
+                {ResponseSection(correct, reason)}
+            </div>
+        </div>
+    )
+}

frontend/src/components/VerbalQuestionsExercise.tsx

@@ -0,0 +1,107 @@
+import { useState } from 'react';
+import {getAIMarking, getLanguage} from '../logic/sdk';
+import ClipLoader from "react-spinners/ClipLoader";
+import { Icon } from '@iconify/react';
+import {VerbalQuestion} from "../logic/CourseData";
+
+interface VerbalQuestionProps {
+  q: VerbalQuestion
+  chapter: string;
+  onSubmit: Function;
+}
+
+export default function VerbalQuestionsExercise({q, chapter, onSubmit}: VerbalQuestionProps) {
+    const language = getLanguage().name;
+    const [selectedWords, setSelectedWords] = useState<string[]>([]);
+    const [remainingWords, setRemainingWords] = useState(q.wordBank);
+    const [answered, setAnswered] = useState(false);
+    const [correct, setCorrect] = useState("");
+    const [reason, setReason] = useState("");
+    const [loading, setLoading] = useState(false);
+
+    const handleWordBankClick = (word: string) => {
+        setSelectedWords([...selectedWords, word]);
+        setRemainingWords(remainingWords.filter((w) => w !== word));
+    }
+
+    const handleSelectedWordClick = (word: string) => {
+        setRemainingWords([...remainingWords, word]);
+        setSelectedWords(selectedWords.filter((w) => w !== word));
+    }
+
+    const handleSubmit = () => {
+        const userAnswer = selectedWords.join("");
+        if (answered) {
+            setAnswered(false);
+            onSubmit();
+        } else {
+            setLoading(true);
+            getAIMarking(
+                q.question,
+                userAnswer.toLowerCase(),
+                q.expected.toLowerCase(),
+                chapter,
+                language
+            ).then((res) => {
+                setLoading(false);
+                setAnswered(true);
+                setCorrect(res.correct);
+                setReason(res.reason);
+            }).catch((e) => console.error(e));
+        }
+
+    }
+
+    const ResponseSection = (correct: string | null, reason: string | null) => {
+        if (!answered) {
+            return (
+                <div className='w-full h-32'>
+                    <div className=' flex-row flex-wrap w-full h-full'>
+                        {remainingWords.map((word, index) => (
+                            <span 
+                            key={index} 
+                            className="border-gray-300 border-2 m-1 p-1 px-3 rounded-xl inline-block cursor-pointer"
+                            onClick={(event) => handleWordBankClick(word)}>
+                                {word}
+                            </span>
+                        ))}
+                    </div>
+                    <button className='green' onClick={(e) => handleSubmit()}>
+                        {loading ? <ClipLoader
+                            color="white"
+                            loading={loading}
+                            aria-label="Loading Spinner"
+                            data-testid="loader"
+                        /> : !answered ? "Submit" : "Continue"}
+                    </button>
+                </div>
+
+            )
+        } else {
+            return (
+                <div className=' flex-row flex-wrap border-b-4 w-full h-36'>
+                    <h3>{correct}</h3>
+                    <p>{reason}</p>
+                    <button className='green w-full' onClick={(e) => handleSubmit()}>{!answered ? "Submit" : "Continue"}</button>
+                </div>
+            )
+        }
+    }
+
+    return (
+        <div className='v-layout space-y-8 items-center w-full'>
+            <h2>What do you hear?</h2>
+            <audio src={q.url} controls className='audio-player'></audio>
+            <div className='flex-row flex-wrap border-b-4 w-full h-32'>
+                {selectedWords.map((word, index) => (
+                    <span 
+                        key={index}
+                        className="border-gray-300 border-b-2 border-2 m-1 p-1 px-3 rounded-xl inline-block cursor-pointer"
+                        onClick={(e) => handleSelectedWordClick(word)}>
+                        {word}
+                    </span>
+                ))}
+            </div>
+            {ResponseSection(correct, reason)}
+        </div>
+    )}

frontend/src/components/VideoExercise.tsx

@@ -0,0 +1,69 @@
+import { useState } from 'react';
+import { getAIMarking, getLanguage } from '../logic/sdk';
+import ClipLoader from "react-spinners/ClipLoader";
+import { VideoQuestion } from "../logic/CourseData";
+
+interface VideoQuestionProps {
+  q: VideoQuestion;
+  chapter: string;
+  onSubmit: Function;
+}
+
+export default function VideoExercise({q, chapter, onSubmit}: VideoQuestionProps) {
+  const language = getLanguage();
+  const [userAnswer, setUserAnswer] = useState("");
+  const [answered, setAnswered] = useState(false);
+  const [correct, setCorrect] = useState("");
+  const [reason, setReason] = useState("");
+  const [loading, setLoading] = useState(false);
+
+  const handleChange = (e: React.ChangeEvent<HTMLInputElement>) => {
+    setUserAnswer(e.target.value);
+  }
+
+  const handleSubmit = () => {
+    if (answered) {
+      setAnswered(false);
+      onSubmit();
+    } else {
+      setLoading(true);
+      getAIMarking(
+        `Please watch the video and answer the question: "${q.question}".`,
+        userAnswer.toLowerCase(),
+        `${q.expected} (For the grader, here is the video description: ${q.description}. And please accept any reasonable answer in both English and ${language.name}).`,
+        chapter,
+        language.name
+      ).then((res) => {
+        setLoading(false);
+        setAnswered(true);
+        setCorrect(res.correct);
+        setReason(res.reason);
+      }).catch((e) => console.error(e));
+    }
+  }
+
+  return (
+    <div className='v-layout space-y-8 items-center w-full'>
+      <div className="box">
+        {q.question}
+      </div>
+      <video src={q.clipUrl} controls className='video-player'></video>
+      <div className='flex-col w-full'>
+        {!answered ?
+          <div className="v-layout">
+            <input type="text" value={userAnswer} onChange={handleChange}
+                   placeholder="Type your answer here"/>
+            <button className='green' onClick={() => handleSubmit()}>
+              {loading ? <ClipLoader color="white" loading={loading} /> : "Submit"}
+            </button>
+          </div> :
+          <div className='flex-col w-full'>
+            <h3>{correct}</h3>
+            <p>{reason}</p>
+            <button className='green w-full' onClick={() => handleSubmit()}>Continue</button>
+          </div>
+        }
+      </div>
+    </div>
+  );
+}

frontend/src/components/WrittenQuestionExercise.tsx

@@ -0,0 +1,110 @@
+import { useState } from 'react';
+import {getAIMarking, getLanguage} from '../logic/sdk';
+import ClipLoader from "react-spinners/ClipLoader";
+import {WrittenQuestion} from "../logic/CourseData";
+
+interface WrittenQuestionProps {
+  q: WrittenQuestion
+  chapter: string;
+  onSubmit: Function;
+}
+
+export default function WrittenQuestionExercise({q, chapter, onSubmit}: WrittenQuestionProps) {
+    const language = getLanguage();
+    const [selectedWords, setSelectedWords] = useState<string[]>([]);
+    const [remainingWords, setRemainingWords] = useState(q.wordBank);
+    const [answered, setAnswered] = useState(false);
+    const [correct, setCorrect] = useState("");
+    const [reason, setReason] = useState("");
+    const [loading, setLoading] = useState(false);
+
+    const handleWordBankClick = (word: string) => {
+        setSelectedWords([...selectedWords, word]);
+        setRemainingWords(remainingWords.filter((w) => w !== word));
+    }
+
+    const handleSelectedWordClick = (word: string) => {
+        setRemainingWords([...remainingWords, word]);
+        setSelectedWords(selectedWords.filter((w) => w !== word));
+    }
+
+    const handleSubmit = () => {
+        // TODO: This space join isn't correct.
+        // When the word bank is Japanese or Chinese, the words are not separated by spaces.
+        // When the langauge is English, the words are separated by spaces.
+        // We need to figure out how to handle this.
+        const userAnswer = selectedWords.join(" ");
+        if (answered) {
+            setAnswered(false);
+            onSubmit();
+        } else {
+            setLoading(true);
+            getAIMarking(
+                q.question,
+                userAnswer.toLowerCase(),
+                q.expected.toLowerCase(),
+                chapter,
+                language.name
+            ).then((res) => {
+                setLoading(false);
+                setAnswered(true);
+                setCorrect(res.correct);
+                setReason(res.reason);
+            }).catch((e) => console.error(e));
+        }
+    }
+
+    const ResponseSection = (correct: string | null, reason: string | null) => {
+        if (!answered) {
+            return (
+                <div className='w-full h-36'>
+                    <div className=' flex-row flex-wrap w-full h-full'>
+                        {remainingWords.map((word, index) => (
+                            <span 
+                            key={index} 
+                            className="border-gray-300 border-2 m-1 p-1 px-3 rounded-xl inline-block cursor-pointer"
+                            onClick={() => handleWordBankClick(word)}>
+                                {word}
+                            </span>
+                        ))}
+                    </div>
+                    <button className='green' onClick={() => handleSubmit()}>
+                        {loading ? <ClipLoader
+                            color="white"
+                            loading={loading}
+                            aria-label="Loading Spinner"
+                            data-testid="loader"
+                        /> : !answered ? "Submit" : "Continue"}
+                    </button>
+                </div>
+
+            )
+        } else {
+            return (
+                <div className=' flex-row flex-wrap border-b-4 w-full h-36'>
+                    <h3>{correct}</h3>
+                    <p>{reason}</p>
+                    <button className='green w-full' onClick={() => handleSubmit()}>{!answered ? "Submit" : "Continue"}</button>
+                </div>
+            )
+        }
+    }
+
+    return (
+        <div className='v-layout space-y-8 items-center w-full'>
+            <div className='round box h-min no-shadow relative min-h-[60px] flex items-center justify-center mx-5'>
+                {q.question}
+            </div>
+            <div className='flex-row flex-wrap border-b-4 w-full h-36'>
+                {selectedWords.map((word, index) => (
+                    <span 
+                        key={index}
+                        className="border-gray-300 border-b-2 border-2 m-1 p-1 px-3 rounded-xl inline-block cursor-pointer"
+                        onClick={() => handleSelectedWordClick(word)}>
+                        {word}
+                    </span>
+                ))}
+            </div>
+            {ResponseSection(correct, reason)}
+        </div>
+    )}

frontend/src/components/WrittenVocabularyExercise.tsx

@@ -0,0 +1,43 @@
+import { useState } from 'react';
+import {VocabularyQuestion} from "../logic/CourseData";
+
+interface WrittenVocabularyProps {
+  q: VocabularyQuestion
+  onSubmit: Function;
+}
+
+export default function WrittenQuestionExercise({q, onSubmit}: WrittenVocabularyProps) {
+    const [answered, setAnswered] = useState(false);
+
+    const handleSubmit = () => {
+        if (answered) {
+            setAnswered(false);
+            onSubmit();
+        } else {
+            setAnswered(true);
+        }
+    }
+
+    return (
+        <div className='v-layout space-y-8 items-center w-full'>
+            <h1>Vocabulary: Do you know this word?</h1>
+            <div className='round box h-min no-shadow relative min-h-[60px] flex items-center justify-center mx-5'>
+                {q.question}
+            </div>
+            <div className=' flex-col flex-wrap w-full'>
+                {answered ? 
+                    <div className='flex-col w-full'>
+                        <h3>{q.pronunciation}</h3>
+                        <p>{q.description}</p>
+                        <p>{q.example}</p>
+                        <div className='flex-row'>
+                            <button className='green my-4' onClick={(e) => handleSubmit()}>I got it!</button>
+                            <button className='red' onClick={(e) => handleSubmit()}>I forgot</button>
+                        </div>
+                    </div>
+                    : 
+                    <button className='white' onClick={(e) => handleSubmit()}>Show Meaning</button>
+                }
+            </div>
+        </div>
+    )}

frontend/src/index.sass

@@ -1,6 +1,7 @@
 @tailwind base
 @tailwind components
 @tailwind utilities
+@yaireo/tagify/src/tagify.scss
 
 $c-default-text: #222
 $c-default-icon: #888
@@ -10,7 +11,13 @@ $c-green: rgb(88, 204, 2)
 $c-green-shadow: rgb(88, 167, 0)
 $c-red: rgb(255, 69, 58)
 $c-red-shadow: darken($c-red, 10%)
+$c-gold: rgb(255, 200, 0)
+$c-gold-flare: rgb(251, 233, 2)
+$c-gold-shadow: rgb(221, 164, 11)
+$c-gold-text: rgb(195, 126, 11)
 $c-white-shadow: rgb(222, 222, 222)
+$c-gray: rgb(229, 229, 229)
+$c-gray-shadow: rgb(175, 175, 175)
 $border-radius: 16px
 $shadow-width: 0 4px 0
 
@@ -78,6 +85,12 @@ button.white
   &.no-shadow
     border-width: 2px
 
+.box.green
+  border: none
+  background-color: $c-green
+  box-shadow: $shadow-width $c-green-shadow
+  color: white
+
 input
   @extend .box
   transition: all 0.2s ease-in-out
@@ -101,6 +114,11 @@ h2
   font-size: 1.5em
   margin-bottom: 0.5em
   text-align: center
+  
+.subtext
+  text-align: center
+  color: rgb(75, 85, 99)
+  opacity: 0.8
 
 .v-layout
   display: flex
@@ -109,13 +127,19 @@ h2
 
   gap: 1em
   width: 100%
-  height: 100%
+
+  margin-bottom: 60px
 
   &.non-center
     justify-content: flex-start
 
+  &.gap2
+    gap: 2em
+
 .page-pad
   padding: 2em 1em
+  height: 100%
+  @extend .non-center
 
 .navbar
   position: fixed
@@ -168,12 +192,13 @@ h2
   color: #a0aec0
   font-size: 1.5rem
 
-.record-btn
+.record-container
+  background-color: white !important
   position: fixed
-  bottom: 20px
+  bottom: 0px
   left: 50%
   transform: translateX(-50%)
-  width: calc(100% - 40px)
+  width: 100%
   padding: 10px 16px
 
 .record-btn.red
@@ -188,7 +213,7 @@ h2
   margin: 20px auto
 
 .message
-  margin: 10px
+  margin: 3px
   padding: 10px
   border-radius: 5px
   color: white
@@ -201,4 +226,37 @@ h2
 .message.other
   align-self: flex-start
   background-color: $c-green
-  border-radius: 0 20px 20px 20px
+  border-radius: 0 20px 20px 20px
+
+.tags
+    display: flex
+    flex-wrap: wrap
+    border: solid $c-white-shadow
+    padding: 10px
+    border-radius: 20px
+    height: 200px
+    overflow-y: scroll
+    align-content: flex-start
+    gap: 10px 5px
+    margin-top: 3px
+
+.tag
+    background-color: $c-blue
+    color: white
+    border-radius: 20px
+    padding: 5px 10px
+    margin: 0
+    display: flex
+    align-items: center
+    justify-content: space-between
+    height: 30px
+
+.delete-tag
+    margin-left: 6px
+    font-weight: 600
+    width: 20px
+    height: 20px
+    color: white
+    display: flex
+    align-items: center
+    justify-content: center

frontend/src/index.tsx

@@ -12,6 +12,9 @@ import CollabLearning from './pages/CollabLearning';
 import Review from './pages/Review';
 import CharacterSelection from './pages/CharacterSelection';
 import Character from './pages/Character';
+import Lesson from './pages/Lesson';
+import FakeUserSelection from './pages/FakeUserSelection';
+import UserChat from './pages/UserChat';
 
 const router = createBrowserRouter([
   {
@@ -49,7 +52,19 @@ const router = createBrowserRouter([
   {
     path: '/character',
     element: <Character/>
-  }
+  },
+  {
+    path: '/lesson',
+    element: <Lesson/>
+  },
+  {
+    path: '/fake-user-selection',
+    element: <FakeUserSelection/>
+  },
+  {
+    path: '/user-chat',
+    element: <UserChat/>
+  },
 ])
 
 const root = ReactDOM.createRoot(

frontend/src/logic/CourseData.ts

@@ -0,0 +1,219 @@
+export interface Chapter
+{
+  name: string
+  steps: Step[]
+}
+
+export interface Step
+{
+  questions: Question[]
+}
+
+export interface _Question
+{
+  question: string
+  type: string
+}
+export type Question = WrittenQuestion | VocabularyQuestion | VerbalQuestion | VerbalPronunciation | VideoQuestion
+
+export interface WrittenQuestion extends _Question
+{
+  wordBank: string[]
+  expected: string
+  type: 'written-question'
+}
+
+export interface VocabularyQuestion extends _Question
+{
+  pronunciation: string
+  description: string
+  example: string
+  type: 'written-vocabulary'
+}
+
+export interface VerbalQuestion extends _Question
+{
+  wordBank: string[]
+  expected: string
+  translation: string
+  url: string
+  type: 'verbal-question'
+}
+
+export interface VerbalPronunciation extends _Question
+{
+  translation: string
+  type: 'verbal-pronunciation'
+}
+
+export interface VideoQuestion extends _Question
+{
+  clipUrl: string
+  description: string
+  expected: string
+  type: 'video'
+}
+
+export const chapters_jp: Chapter[] = [
+  {
+    name: 'Order food',
+    steps: [{
+      questions: [
+
+        {
+          question: 'What did Yui come to the club meeting for?',
+          clipUrl: window.location.origin + "/video/cake.mp4",
+          description: "This is a clip from the anime 'K-On'. Yui is a member of the light music club. She came to the club meeting to eat cake.",
+          expected: 'ケーキ or cake',
+          type: 'video',
+        },
+        {
+          question: 'Translate this sentence: すしをください',
+          wordBank: ['I', 'sushi', 'cookies', 'want', 'please', 'give', 'rice', 'some', 'yesterday'],
+          expected: 'Sushi please / I want sushi',
+          type: "written-question"
+        },
+        {
+          question: '刺身',
+          pronunciation: 'さしみ (sashimi)',
+          description: 'Sashimi is a Japanese delicacy consisting of fresh raw fish or meat sliced into thin pieces and often eaten with soy sauce.',
+          example: '刺身を好きです。 (I like sashimi)',
+          type: 'written-vocabulary',
+        },
+        {
+          question: 'What do you hear?',
+          wordBank: ['刺身', 'ケーキ', 'の', 'は', 'おいしい', 'おもい', 'すし', '中', 'です'],
+          expected: 'ケーキはおいしいです',
+          translation: 'Cake is delicious',
+          url: window.location.origin + '/audio/jp_1_1_3.mp3',
+          type: 'verbal-question',
+        },
+        {
+          question: 'Please say: すしをたくさんあります',
+          translation: 'There is a lot of sushi',
+          type: 'verbal-pronunciation',
+        },
+      ]
+    },
+      {
+        questions: [
+          {
+            // question: "Translate this sentence: Water please",
+            // wordBank: ['水', 'を', 'ください', 'おいしい', 'おもい', 'すし', '中', 'です'],
+            question: 'Translate this sentence: 水をください',
+            wordBank: ['I', 'sushi', 'cookies', 'want', 'please', 'give', 'Water', 'some', 'yesterday'],
+            // expected: '水をください',
+            expected: 'Water please',
+            type: "written-question"
+          },
+          {
+            question: '団子',
+            pronunciation: 'だんご (dango)',
+            description: 'Dango is a kind of mochi, Japanese dumpling and sweet made from mochiko (rice flour).',
+            example: '大きいな団子です。(It is a big dango)',
+            type: 'written-vocabulary',
+          },
+          {
+            question: 'What do you hear?',
+            wordBank: ['刺身', '水', 'は', 'おいしい', 'おもい', 'すし', '中', 'です'],
+            expected: '水です',
+            translation: 'It is water',
+            url: window.location.origin + '/audio/jp_1_2_3.mp3',
+            type: 'verbal-question',
+          },
+          {
+            question: 'Please say: 刺身おください',
+            translation: 'Please give me sashimi',
+            type: 'verbal-pronunciation',
+          },
+          {
+            question: 'What is the following song about?',
+            clipUrl: window.location.origin + "/video/dango.mp4",
+            description: "This is the song 'Dango Daikazoku' from the anime 'Clannad'. It is about a family of dango.",
+            expected: '団子 or dango',
+            type: 'video',
+          }
+        ]
+      }]
+  }
+]
+
+export const chapters_es: Chapter[] = [
+  {
+    name: 'Order food',
+    steps: [{
+      questions: [
+        {
+          question: "Translate this phrase: Me provoca un helado",
+          wordBank: ['I', 'want', 'ice cream', 'an', 'urgent', 'am', 'craving', 'milkshake'],
+          expected: 'I want an ice cream',
+          type: "written-question"
+        },
+        {
+          question: 'Pastel',
+          pronunciation: 'Pastel (pahs-tehl)',
+          description: 'Pastel is the Spanish word for "cake". It is a popular dessert in many Spanish-speaking countries, also known as torta.',
+          example: 'Vamos a celebrar con un pastel! (Let\'s celebrate with a cake!)',
+          type: 'written-vocabulary',
+        },
+        {
+          question: 'What do you hear?',
+          wordBank: ['favor', 'ver', 'el', 'menú', 'por', 'Quiero', 'libro', 'risas', 'oler'],
+          expected: 'Quiero ver el menú por favor',
+          translation: 'I want to see the menu, please',
+          url: window.location.origin + '/audio/es_1_1_3.mp3',
+          type: 'verbal-question',
+        },
+        {
+          question: 'Please say: Este postre es exquisito',
+          translation: 'This dessert is exquisite',
+          type: 'verbal-pronunciation',
+        },
+        {
+          question: 'What is the filling of the tequeño?',
+          clipUrl: window.location.origin + "/video/tequeños.mp4",
+          description: "Tequeños are a popular Venezuelan appetizer. They are made of cheese wrapped in dough and fried.",
+          expected: 'Cheese (queso)',
+          type: 'video',
+        }
+      ]
+    },
+      {
+        questions: [
+          {
+            question: "Translate this phrase: Yo quiero agua por favor",
+            wordBank: ['I', 'juice', 'water', 'want', 'please', 'give', 'some', 'now'],
+            expected: 'I want water please',
+            type: "written-question"
+          },
+          {
+            question: 'Jugo',
+            pronunciation: 'Jugo (hoo-goh)',
+            description: 'Jugo is the Spanish word for "juice". In some parts of the world, juice is also called zumo.',
+            example: 'Me gusta tomar jugo de naranja! (I like to drink orange juice!)',
+            type: 'written-vocabulary',
+          },
+          {
+            question: 'What do you hear?',
+            wordBank: ['Que', 'Quien', 'tomar', 'yo', 'tú', 'quieres', 'comer', 'de'],
+            expected: 'Que quieres de comer',
+            translation: 'What do you want to eat?',
+            url: window.location.origin + '/audio/es_1_2_3.mp3',
+            type: 'verbal-question',
+          },
+          {
+            question: 'Please say: La comida está deliciosa!',
+            translation: 'The food is delicious!',
+            type: 'verbal-pronunciation',
+          },
+          {
+            question: 'What is the boy going to eat?',
+            clipUrl: window.location.origin + "/video/paella.mp4",
+            description: "The boy is about to eat paella, a traditional Spanish dish. It is made of rice, seafood, and vegetables.",
+            expected: 'Paella',
+            type: 'video',
+          }
+        ]
+      }]
+  }
+]

frontend/src/logic/fakeUsers.ts

@@ -0,0 +1,40 @@
+export const target_interests = [
+    "gaming", "cooking", "sci-fi", "sports", "music", "programming", "first-person shooters", "painting", "baking", "astronomy", "archery"
+]
+
+export const target_names = [
+    "John", "Mary", "Bob", "Alice", "Jane", "Frank", "Sally", "Jack", "Jill", "Joe", "Sue"
+]
+
+interface User {
+    name: string;
+    interests: string[];
+}
+
+export function generateFakeUsers(interests: string[]): User[] {
+    let fakeUsers = [];
+    const randomNumber = Math.floor(Math.random() * target_names.length) + 1;
+
+    for (let i = 0; i < randomNumber; i++) {
+        const randomName = target_names[Math.floor(Math.random() * target_names.length)];
+        const randomNumberOfInterests = Math.floor(Math.random() * target_interests.length) + 1;
+        const randomInterests: string[] = [];
+        for (let j = 0; j < 3; j++) {
+            const randomInterest = target_interests[Math.floor(Math.random() * target_interests.length)];
+            if (!randomInterests.includes(randomInterest)) {
+                randomInterests.push(randomInterest);
+            }
+        }
+
+        // add a random interest from the user's interests
+        const randomInterest = interests[Math.floor(Math.random() * interests.length)];
+        if (!randomInterests.includes(randomInterest)) {
+            randomInterests.push(randomInterest);
+        }
+
+        const newUser = { name: randomName, interests: randomInterests };
+        fakeUsers.push(newUser);
+    }
+        
+    return fakeUsers;
+}

frontend/src/logic/sdk.ts

@@ -1,24 +1,29 @@
 
 import MandarinChinese from '../assets/img/lang/zh.svg'
 import Japanese from '../assets/img/lang/ja.svg'
+import Spanish from '../assets/img/lang/es.svg'
 import English from '../assets/img/lang/en.svg'
+import {Chapter, chapters_jp, chapters_es} from "./CourseData";
 
 // db.users: Signup table map<username, password>
 // db.user: Current logged-in user
 const db = localStorage
 
-const backendUrl = 'https://localhost:8000'
+// const backendUrl = 'https://318-bk.hydev.org'
+const backendUrl = "https://127.0.0.1:8000"
 
 export interface Lang {
   name: string
   code: string
   icon: string
+  data: Chapter[]
 }
 
-export const possibleLangs = [
-  {name: 'Mandarin Chinese', code: 'zh', icon: MandarinChinese},
-  {name: 'Japanese', code: 'ja', icon: Japanese},
-  {name: 'English', code: 'en', icon: English},
+export const possibleLangs: Lang[] = [
+  // {name: 'Mandarin Chinese', code: 'zh', icon: MandarinChinese, data: []},
+  {name: 'Japanese', code: 'ja', icon: Japanese, data: chapters_jp},
+  {name: 'Spanish', code: 'es', icon: Spanish, data: chapters_es},
+  // {name: 'English', code: 'en', icon: English, data: []},
 ]
 
 export function signup(username: string, password: string, language: string)
@@ -28,7 +33,7 @@ export function signup(username: string, password: string, language: string)
 
   const users = JSON.parse(db.users)
 
-  users[username] = {password, language}
+  users[username] = {password, language, "experience": 10, "completed_modules": [], "day_streak": 0, "speaking": 0}
   db.users = JSON.stringify(users)
 
   db.user = username
@@ -53,17 +58,54 @@ export function isLoggedIn()
   return !!db.user
 }
 
-export function getLanguage(username: string)
-{
-  const users = JSON.parse(db.users)
-  return users[username].language
-}
-
 export function getUsername()
 {
   return db.user
 }
 
+export function getXp()
+{
+  if (!db.completed) return 0
+  const completed = JSON.parse(db.completed)
+  return completed.length * 20
+}
+
+export function isStepCompleted(chapter: string, step: number)
+{
+  if (!db.completed) return false
+  const completed = JSON.parse(db.completed)
+  return completed.includes(`${chapter}-${step}`)
+}
+
+export function setStepCompleted(chapter: string, step: number)
+{
+  if (!db.completed)
+    db.completed = JSON.stringify([])
+  const completed = JSON.parse(db.completed)
+  completed.push(`${chapter}-${step}`)
+  db.completed = JSON.stringify(completed)
+}
+
+export function getLanguage(): Lang
+{
+  const users = JSON.parse(db.users)
+  const lang = users[getUsername()].language
+  if (!lang)
+  {
+    alert('No language set, logging out')
+    logout()
+    window.location.href = '/'
+  }
+  const lang_obj = possibleLangs.find(l => l.name === lang)!
+  if (!lang_obj)
+  {
+    alert(`Invalid language set: ${lang}, logging out`)
+    logout()
+    window.location.href = '/'
+  }
+  return lang_obj
+}
+
 export interface CharacterChatCreationRequest 
 {
   character: string;
@@ -71,19 +113,19 @@ export interface CharacterChatCreationRequest
   language: string;
 }
 
-export interface CharacterChatCreationResponse 
+export interface ChatCreationResponse 
 {
   chat_id: string;
 }
 
-export async function startFictionalChat(character: string): Promise<CharacterChatCreationResponse> {
+export async function startFictionalChat(character: string): Promise<ChatCreationResponse> {
   const currUser = getUsername();
-  const language = getLanguage(currUser);
+  const language = getLanguage();
   
   const request: CharacterChatCreationRequest = {
     character: character,
     user_name: currUser,
-    language: language
+    language: language.name
   };
   
   const response = await fetch(`${backendUrl}/character-chat`, {
@@ -103,6 +145,42 @@ export async function startFictionalChat(character: string): Promise<CharacterCh
   return json.session_id;
 }
 
+export interface HumanChatCreationRequest
+{
+  user_name: string;
+  user_hobbies: string[];
+  target_name: string;
+  target_hobbies: string[];
+  language: string;
+}
+
+export async function startHumanChat(user_hobbies: string[], target_name: string, target_hobbies: string[]): Promise<ChatCreationResponse> {
+
+  const request: HumanChatCreationRequest = {
+    user_name: getUsername(),
+    user_hobbies: user_hobbies,
+    target_name: target_name,
+    target_hobbies: target_hobbies,
+    language: getLanguage().name
+  };
+
+  const response = await fetch(`${backendUrl}/human-chat`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json'
+    },
+    body: JSON.stringify(request),
+  });
+
+  if (!response.ok) {
+    const errorData = await response.json();
+    throw new Error(`HTTP error! status: ${response.status}, message: ${errorData.message}`);
+  }
+
+  const json = await response.json();
+  return json.session_id;
+}
+
 export async function speechToText(audioBlob: Blob): Promise<string> {
   const formData = new FormData();
   formData.append('audio_file', audioBlob, 'audio.wav');
@@ -142,6 +220,27 @@ export async function characterChatMessage(sessionId: string, message: string):
   return json;
 }
 
+export async function humanChatMessage(sessionId: string, message: string): Promise<{ msg: string, audio_id: string }> {
+
+  const request = {msg : message};
+
+  const response = await fetch(`${backendUrl}/human-chat/${sessionId}`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json'
+    },
+    body: JSON.stringify(request),
+  });
+
+  if (!response.ok) {
+    const errorData = await response.json();
+    throw new Error(`HTTP error! status: ${response.status}, message: ${errorData.message}`);
+  }
+
+  const json = await response.json();
+  return json;
+}
+
 export async function getAudio(audioId: string): Promise<Blob> {
   const response = await fetch(`${backendUrl}/audio/${audioId}`);
 
@@ -151,4 +250,45 @@ export async function getAudio(audioId: string): Promise<Blob> {
 
   const blob = await response.blob();
   return blob;
-}
+}
+
+export interface UserQuestionRequest 
+{
+  question: string;
+  user_answer: string;
+  expected: string;
+  chapter: string;
+  language: string;
+}
+
+export interface UserQuestionFeedbackResponse 
+{
+  correct: string;
+  reason: string;
+}
+
+export async function getAIMarking(question: string, user_answer: string, expected: string, chapter: string, language: string): Promise<UserQuestionFeedbackResponse> {
+  const request: UserQuestionRequest = {
+    question: question,
+    user_answer: user_answer,
+    expected: expected,
+    chapter: chapter,
+    language: language
+  };
+  
+  const response = await fetch(`${backendUrl}/ai-mark`, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json'
+    },
+    body: JSON.stringify(request),
+  });
+
+  if (!response.ok) {
+    const errorData = await response.json();
+    throw new Error(`HTTP error! status: ${response.status}, message: ${errorData.message}`);
+  }
+
+  const json = await response.json();
+  return json;
+}

frontend/src/pages/Character.tsx

@@ -16,6 +16,16 @@ export default function Character() {
     let chunks = [] as any;
     const mediaRecorder = useRef<MediaRecorder | null>(null);
 
+    const messageEndRef = useRef<HTMLDivElement>(null);
+
+    const scrollToBottom = () => {
+        messageEndRef.current?.scrollIntoView({ behavior: "smooth" })
+    }
+
+    useEffect(() => {
+        scrollToBottom()
+    }, [messages]);
+
     useEffect(() => {
         navigator.mediaDevices.getUserMedia({ audio: true }).then((stream) => {
             mediaRecorder.current = new MediaRecorder(stream);
@@ -57,25 +67,30 @@ export default function Character() {
     }, [isRecording]);
 
     return (
-        <div>
-            <div className="v-layout p-10">
-                <Icon icon="mdi:arrow-left" className="back-button" onClick={() => navigate(-1)} />
-                <h1 className="text-center">Talk With...</h1>
-                <CharacterBadge name={name} image={image} onClick={() => {}}/>
-                <div className="chat-area">
-                    {messages.length === 0 ? (
-                        <p className="text-center text-gray-400">Please record a message to start the conversation.</p>
-                    ) : (
-                        messages.map((message, index) => (
-                            <div key={index} className={`message ${message.sender}`}>
-                                <p>{message.text}</p>
-                            </div>
-                        ))
-                    )}
+        <div className='flex flex-col h-screen'>
+            <div className="flex-grow overflow-y-auto p-6">
+                <div>
+                    <Icon icon="mdi:arrow-left" className="back-button" onClick={() => navigate(-1)} />
+                    <h1 className="text-center">Talk With...</h1>
+                    <CharacterBadge name={name} image={image} onClick={() => {}}/>
+                    <div className="chat-area pb-10">
+                        {messages.length === 0 ? (
+                            <p className='subtext'>Please record a message to start the conversation.</p>
+                        ) : (
+                            messages.map((message, index) => (
+                                <div key={index} className={`message ${message.sender}`}>
+                                    <p>{message.text}</p>
+                                </div>
+                            ))
+                        )}
+                    </div>
+                    <div ref={messageEndRef} />
+                </div>
+                <div className='record-container'>
+                    <button className={`${isRecording ? 'red' : ''}`} onClick={handleRecord}>
+                        {isRecording ? 'Stop Recording' : 'Record'}
+                    </button>
                 </div>
-                <button className={`record-btn ${isRecording ? 'red' : ''}`} onClick={handleRecord}>
-                    {isRecording ? 'Stop Recording' : 'Record'}
-                </button>
             </div>
         </div>
     )

frontend/src/pages/CharacterSelection.tsx

@@ -23,7 +23,7 @@ export default function CharacterSelection() {
 
     return (
         <div className="flex flex-col items-center justify-center">
-            <div className="v-layout p-10">
+            <div className="v-layout p-6">
                 <h1>Talk With...</h1>
                 <div className="flex flex-wrap justify-center gap-3">
                     {characters.map(character => (

frontend/src/pages/CollabLearning.tsx

@@ -1,14 +1,71 @@
 import NavBar from "../components/NavBar"
+import React, { useState } from 'react';
+import { generateFakeUsers } from '../logic/fakeUsers';
+import { useNavigate } from 'react-router-dom';
 
 export default function CollabLearning() {
 
+    const navigate = useNavigate();
+
+    const [interests, setInterests] = useState<string[]>([]);
+    const [newInterest, setNewInterest] = useState("")
+    const [errorMessage, setErrorMessage] = useState("")
+
+    const handleDelete = (tagToDelete: any) => {
+        setInterests(interests.filter(tag => tag !== tagToDelete));
+    }
+
+    const handleAddTag = (event: React.KeyboardEvent<HTMLInputElement>) => {
+        if (event.key === 'Enter') {
+            event.preventDefault();
+            if (newInterest && !interests.includes(newInterest)) {
+                setInterests([...interests, newInterest]);
+                setNewInterest('');
+                setErrorMessage('');
+            } else if (interests.includes(newInterest)) {
+                setErrorMessage('You already entered this interest');
+            }
+        }
+    }
+
+    const handleMatchClick = () => {
+        if (interests.length === 0) {
+            setErrorMessage('Please enter at least one interest');
+            return;
+        }
+        
+        const fakeUsers = generateFakeUsers(interests)
+        
+        navigate('/fake-user-selection', { state: { fakeUsers: fakeUsers, interests: interests } });
+
+
+    }
+
     return (
-        <div className="v-layout p-10">
+        <div className="v-layout p-6">
             <div className="flex flex-col flex-1">
-                <h1>Collaborative Learning</h1>
+                <h1>Chat</h1>
+                <p className="subtext">Find people fluent in your taget language to Chat!</p>
+                <p className="subtext">Help them learn a language you know!</p>
+                <p className="font-bold pt-10">Interests</p>
+                <div className="tags">
+                    {interests.length === 0 ? (
+                        <p className="subtext">Enter a new interest below and press "Enter"!</p>
+                    ) : (
+                        interests.map((interest) => (
+                            <div key={interest} className="tag">
+                                {interest}
+                                <span className="delete-tag" onClick={(e) => { e.stopPropagation(); handleDelete(interest); }}> X</span>
+                            </div>
+                        ))
+                    )}
+                </div>
+                {errorMessage && <p className="text-red-600 font-bold mt-5">{errorMessage}</p>}
+                <input className="mt-5" type="text" value={newInterest} onChange={(e) => setNewInterest(e.target.value)} onKeyDown={handleAddTag} placeholder="Enter your interest here!" />
+                <button className="mt-5 green" onClick={() => handleMatchClick()}>Find Chat Partners!</button>
             </div>
             <NavBar />
         </div>
     )
 
-}
+}

frontend/src/pages/Course.sass

@@ -0,0 +1,29 @@
+@import "../index"
+
+.course-button
+    @extend button
+    @extend .green
+
+    box-shadow: 0 8px 0 $c-green-shadow
+
+    width: 70px
+    height: 60px
+    border-radius: 50%
+
+    display: flex
+    justify-content: center
+    align-items: center
+    font-size: 5em
+    overflow: hidden
+
+    &.gray
+        background: $c-gray
+        color: $c-gray-shadow
+        box-shadow: 0 8px 0 $c-gray-shadow
+
+    &.gold
+        background: $c-gold
+        color: $c-gold-text
+        box-shadow: 0 8px 0 $c-gold-shadow
+
+

frontend/src/pages/Course.tsx

@@ -1,14 +1,75 @@
 import NavBar from "../components/NavBar"
+import {Icon} from "@iconify/react";
+import {getLanguage, isLoggedIn, isStepCompleted} from "../logic/sdk";
+import React from "react";
+import "./Course.sass"
+import {Step} from "../logic/CourseData";
+import {useLocation, useNavigate} from "react-router-dom";
 
-export default function Course() {
+function CourseButton(props: {state: 'active' | 'locked' | 'completed', index: number})
+{
+  let cs = 'course-button ' + {active: 'green', locked: 'gray', completed: 'gold'}[props.state];
 
-    return (
-        <div className="v-layout p-10">
-            <div className="flex flex-col flex-1">
-                <h1>Course Page</h1>
-            </div>
-            <NavBar />
+  const icon = {active: 'solar:star-bold', locked: 'solar:lock-bold', completed: 'mingcute:check-fill'}[props.state];
+
+  // Parameters for the sin wave
+  const amplitude = 50; // Change this value to adjust the wave's height
+  const frequency = 1; // Change this value to adjust the wave's frequency
+
+  // Calculate the horizontal translation
+  const translateXValue = amplitude * Math.sin(props.index * frequency);
+
+  return <div className={cs} style={{transform: `translateX(${translateXValue}px)`}}>
+    <Icon icon={icon}/>
+  </div>
+}
+
+
+export default function Course()
+{
+  const location = useLocation();
+  const navigate = useNavigate();
+
+  if (!isLoggedIn())
+  {
+    window.location.href = '/login';
+    return <div></div>;
+  }
+
+  // Get language
+  const lang = getLanguage();
+
+  function click(step: Step)
+  {
+    navigate('/lesson', {state: {questions: step.questions, home: location.pathname}})
+  }
+
+  return (
+    <div className="v-layout page-pad non-center">
+      <div className="flex items-center justify-between font-bold">
+        <img src={lang.icon} alt={lang.name} className="max-w-[50px]"/>
+        <div className="flex items-center text-red-500 text-lg gap-2">
+          <Icon icon="bi:fire" className="text-xl"/>
+          <span>1</span>
         </div>
-    )
+      </div>
 
-}
+      {lang.data.map((chapter, i) => <div key={i}>
+        <div className="box green mb-10">
+          <div>Chapter 1, Section 1</div>
+          <div className="font-bold">{chapter.name}</div>
+        </div>
+
+        <div className="v-layout non-center items-center gap2">
+          {chapter.steps.map((step, i) => <div key={i} onClick={() => click(step)}>
+            <CourseButton state={isStepCompleted(chapter.name, i) ? 'completed' : i == 0 || isStepCompleted(chapter.name, i - 1) ? 'active' : 'locked'}
+                          index={i}/></div>)}
+          {[...Array(5)].map((_, i) => <CourseButton state={'locked'} index={i + chapter.steps.length} key={i}/>)}
+        </div>
+
+        <NavBar/>
+      </div>)}
+    </div>
+  )
+
+}

frontend/src/pages/FakeUserSelection.sass

@@ -0,0 +1,29 @@
+@import "../index"
+
+.user-card
+    display: flex
+    align-items: center
+    justify-content: space-between
+    margin: 10px
+    border: solid $c-green
+    border-radius: 20px
+    padding: 10px
+
+
+.user-interests
+    display: flex
+    flex-direction: row
+    flex-wrap: wrap
+    gap: 5px
+    padding: 5px
+
+.user-interest
+    background-color: $c-green
+    color: white
+    border-radius: 20px
+    padding: 5px 10px
+    margin: 0
+    display: flex
+    align-items: center
+    justify-content: space-between
+    height: 30px

frontend/src/pages/FakeUserSelection.tsx

@@ -0,0 +1,47 @@
+import { useNavigate, useLocation } from "react-router-dom"
+import { Icon } from '@iconify/react';
+import "./FakeUserSelection.sass";
+import { startHumanChat } from "../logic/sdk";
+
+export default function FakeUserSelection() {
+
+    const navigate = useNavigate();
+    const location = useLocation();
+    const { fakeUsers, interests } = location.state;
+
+    const handleUserClick = (user: any) => {
+        startHumanChat(interests, user.name, user.interests).then((sessionId) => {
+            console.log(sessionId);
+            navigate('/user-chat', { state: { user: user, sessionId: sessionId } });
+        })
+    }
+
+    return (
+        <div className="v-layout p-6">
+            <Icon icon="mdi:arrow-left" className="back-button" onClick={() => navigate(-1)} />
+            <div className="flex flex-col flex-1">
+                <h1>Learning Partners</h1>
+            </div>
+            {fakeUsers.map((user: any, index: any) => (
+                <div className="user-card" key={index} onClick={
+                    () => handleUserClick(user)
+                }>
+                    <div>
+                        <div className="w-20 h-20 mx-auto mb-2 p-2 rounded-full border-2 border-dashed border-gray-300 relative">
+                            <span className="text-2xl uppercase font-semibold text-gray-400 absolute top-1/2 left-1/2 transform -translate-x-1/2 -translate-y-1/2">{user.name[0]}</span>
+                        </div>
+                        <h2>{user.name}</h2>
+                    </div>
+                    <div className="flex flex-col">
+                        <p className="font-bold ml-2">Interests</p>
+                        <div className="user-interests">
+                            {user.interests.map((interest: any, i: any) => (
+                                <span className="user-interest" key={i}>{interest}</span>
+                            ))}
+                        </div>
+                        </div>
+                </div>
+            ))}
+        </div>
+    )
+}

frontend/src/pages/Lesson.tsx

@@ -0,0 +1,65 @@
+import {useLocation, useNavigate} from 'react-router-dom';
+import React, {useState} from 'react';
+import WrittenQuestionExercise from "../components/WrittenQuestionExercise"
+import WrittenVocabularyExercise from "../components/WrittenVocabularyExercise"
+import VerbalQuestionsExercise from "../components/VerbalQuestionsExercise"
+import Progress from '../components/Progress';
+import VerbalPronunciationExercise from '../components/VerbalPronunciationExercise';
+import LessonComplete from '../components/LessonComplete';
+import {_Question, chapters_jp, Question} from "../logic/CourseData";
+import VideoExercise from "../components/VideoExercise";
+
+export default function Lesson()
+{
+  const location = useLocation();
+  const navigate = useNavigate();
+  const {questions, home} = location.state;
+  const [currQuestion, setCurrQuestion] = useState<number>(0);
+
+  console.log(questions)
+
+  const handleNavigateBack = () =>
+  {
+    navigate(-1);
+  };
+
+  const onSubmit = () =>
+  {
+    setCurrQuestion(currQuestion + 1);
+  }
+
+  const renderQuestion = (currIndex: number) =>
+  {
+    if (currIndex >= questions.length) {
+      return <LessonComplete home={home}/>;
+    }
+    const chapter = 'Ordering food';
+    const question: Question = questions[currQuestion];
+    switch (question.type)
+    {
+      case 'written-question':
+        return <WrittenQuestionExercise key={currQuestion} q={question} chapter={chapter} onSubmit={onSubmit}/>;
+      case 'written-vocabulary':
+        return <WrittenVocabularyExercise key={currQuestion} q={question} onSubmit={onSubmit}/>;
+      case 'verbal-question':
+        return <VerbalQuestionsExercise key={currQuestion} q={question} chapter={chapter} onSubmit={onSubmit}/>;
+      case 'verbal-pronunciation':
+        return <VerbalPronunciationExercise key={currQuestion} q={question} chapter={chapter} onSubmit={onSubmit}/>;
+      case 'video':
+        return <VideoExercise key={currQuestion} q={question} chapter={chapter} onSubmit={onSubmit}/>;
+      default:
+        return null;
+    }
+  };
+
+  return (
+    <div className="v-layout page-pad non-center">
+      <Progress percent={currQuestion / questions.length * 100} back={handleNavigateBack}/>
+      <div className="p-5">
+        <div className="flex flex-col flex-1 mb-8 items-center">
+          {renderQuestion(currQuestion)}
+        </div>
+      </div>
+    </div>
+  )
+}

frontend/src/pages/Login.tsx

@@ -1,6 +1,6 @@
-import React, { useState } from 'react';
+import React, {useEffect, useState} from 'react';
 import { useNavigate } from "react-router-dom";
-import { login } from '../logic/sdk';
+import {isLoggedIn, login} from '../logic/sdk';
 
 export default function Login() {
   
@@ -9,6 +9,12 @@ export default function Login() {
     const [password, setPassword] = useState("");
     const [err, setErr] = useState("")
 
+    useEffect(() => {
+        if (isLoggedIn()) {
+            navigate("/courses");
+        }
+    }, []);
+
     function submitLogin() {
         try {
             login(username, password)

frontend/src/pages/Profile.sass

@@ -0,0 +1,21 @@
+@import "../index"
+
+.profile-stats > div
+    @extend .box
+
+    display: flex
+    align-items: center
+    gap: 10px
+
+    *
+        white-space: nowrap
+
+    svg
+        font-size: 2em
+        max-width: 25px
+
+    > div
+        > div:nth-child(2)
+            font-size: 0.9em
+
+

frontend/src/pages/Profile.tsx

@@ -1,28 +1,91 @@
 import NavBar from "../components/NavBar"
-import { getUsername, getLanguage, logout } from "../logic/sdk"
-import { useNavigate } from "react-router-dom"
+import {getUsername, getLanguage, logout} from "../logic/sdk"
+import {useNavigate} from "react-router-dom"
+import {Icon} from "@iconify/react";
+import React from "react";
+import "./Profile.sass"
 
-export default function Profile() {
+export default function Profile()
+{
 
-    const username = getUsername();
-    const navigate = useNavigate();
+  const username = getUsername();
+  const lang = getLanguage();
+  const navigate = useNavigate();
 
-    function handleLougout() {
-        logout();
-        console.log("Logged out");
-        navigate('/')
-    }
+  function handleLougout()
+  {
+    logout();
+    console.log("Logged out");
+    navigate('/')
+  }
 
-    return (
-        <div className="v-layout p-10">
-            <div className="flex flex-col flex-1 h-full">
-                <h1>Profile</h1>
-                <h2>Username: {username}</h2>
-                <h2>Currently Learning: {getLanguage(username)}</h2>
-                <button className="red mt-auto mb-12" onClick={() => handleLougout()}>Logout</button>
-            </div>
-            <NavBar />
+  return (
+    <div className="v-layout page-pad non-center">
+      <div className="text-center">
+        <div className="mb-6">
+          <div className="w-20 h-20 mx-auto mb-2 p-2 rounded-full border-2 border-dashed border-gray-300 relative">
+            <span className="text-2xl uppercase font-semibold text-gray-400 absolute top-1/2 left-1/2 transform -translate-x-1/2 -translate-y-1/2">{username[0]}</span>
+          </div>
+          <h2 className="text-4xl font-semibold">{username}</h2>
         </div>
-    )
 
-}
+        <div className="flex flex-col mb-4 text-gray-500">
+          <div className="flex items-center gap-3">
+            <Icon icon="fa-solid:clock" />
+            <span>Joined November 2023</span>
+          </div>
+
+          <div className="flex items-center gap-3">
+            <Icon icon="fa-solid:user-friends" />
+            <span>0 Friends</span>
+          </div>
+
+          <div className="flex items-center gap-3">
+            <Icon icon="fa-solid:language" />
+            <span>{getLanguage().name}</span>
+          </div>
+        </div>
+      </div>
+      <hr className="mb-4"/>
+      <h3 className="text-xl font-semibold mb-4">
+        Statistics
+      </h3>
+      <div className="grid grid-cols-2 gap-4 profile-stats">
+        <div>
+          <Icon icon="fa-solid:fire" className="text-red-400"/>
+          <div>
+            <div className="font-bold">0</div>
+            <div>Day streak</div>
+          </div>
+        </div>
+
+        <div>
+          <Icon icon="ph:lightning-fill" className="text-yellow-400"/>
+          <div>
+            <div className="font-bold">10</div>
+            <div>Total XP</div>
+          </div>
+        </div>
+
+        <div>
+          <Icon icon="fa-solid:check" className="text-green-400"/>
+          <div>
+            <div className="font-bold">0</div>
+            <div>Courses</div>
+          </div>
+        </div>
+
+        <div>
+          <Icon icon="mdi:microphone-message" className="text-blue-400"/>
+          <div>
+            <div className="font-bold">0</div>
+            <div>Speaking</div>
+          </div>
+        </div>
+      </div>
+
+      <NavBar/>
+    </div>
+  )
+
+}

frontend/src/pages/Review.tsx

@@ -1,14 +1,42 @@
+import { useLocation, useNavigate } from "react-router-dom"
 import NavBar from "../components/NavBar"
+import { getLanguage, getUsername } from "../logic/sdk";
+import {_Question, WrittenQuestion} from "../logic/CourseData";
 
 export default function Review() {
+    const navigate = useNavigate();
+    const location = useLocation();
+
+    const writtenReview = ["Question", "Vocabulary"];
+    const verbalReview = ["Question", "Pronunciation"];
+
+    const handleReviewLessonClick = (reviewType: string, lesson: string) => {
+        const lessons: _Question[] = getLanguage().data.flatMap(chapter => chapter.steps).flatMap(step => step.questions);
+        navigate('/lesson', { state: { questions: lessons.filter(it => it.type === `${reviewType}-${lesson}`), home: location.pathname } });
+    }
 
     return (
-        <div className="layout-v p-10">
-            <div className="flex flex-col flex-1">
-                <h1>Review Page</h1>
+        <div className="layout-v page-pad">
+            <h1>Review Page</h1>
+            <h2>Written</h2>
+            <div className="flex flex-col flex-1 mb-8 gap-3">
+                {writtenReview.map(lesson => (
+                    <button className="white" key={lesson}
+                            onClick={() => handleReviewLessonClick("written", lesson.toLowerCase())}>
+                        {lesson}
+                    </button>
+                ))}
+            </div>
+            <h2>Verbal/Listening</h2>
+            <div className="flex flex-col flex-1 gap-3">
+                {verbalReview.map(lesson => (
+                    <button className="white" key={lesson}
+                            onClick={() => handleReviewLessonClick("verbal", lesson.toLowerCase())}>
+                        {lesson}
+                    </button>
+                ))}
             </div>
             <NavBar />
         </div>
     )
-
-}
+}

frontend/src/pages/Signup.tsx

@@ -1,6 +1,6 @@
-import React, { useState } from 'react';
+import React, {useEffect, useState} from 'react';
 import { useNavigate } from "react-router-dom";
-import {possibleLangs, signup} from '../logic/sdk';
+import {isLoggedIn, possibleLangs, signup} from '../logic/sdk';
 import Progress from "../components/Progress";
 import DuoWriting from "../assets/img/duo-writing.png";
 import ChatBox from "../components/ChatBox";
@@ -21,6 +21,12 @@ export default function Signup() {
         _setStage(stage)
     }
 
+    useEffect(() => {
+        if (isLoggedIn()) {
+            navigate("/courses");
+        }
+    }, []);
+
     function submitSignup() {
         try {
             if (password !== confirmPassword) {

frontend/src/pages/UserChat.tsx

@@ -0,0 +1,75 @@
+import { useLocation, useNavigate } from 'react-router-dom';
+import { Icon } from '@iconify/react';
+import { useState, useRef, useEffect } from 'react';
+import { humanChatMessage } from '../logic/sdk';
+
+export default function Character() {
+    const location = useLocation();
+    const navigate = useNavigate();
+    const { user, sessionId } = location.state;
+
+    type Message = { text: string, sender: string };
+    const [messages, setMessages] = useState<Message[]>([]);
+    const [message, setMessage] = useState('');
+
+    const messageEndRef = useRef<HTMLDivElement>(null);
+
+    const scrollToBottom = () => {
+        messageEndRef.current?.scrollIntoView({ behavior: "smooth" })
+    }
+
+    useEffect(() => {
+        scrollToBottom()
+    }, [messages]);
+
+    const handleSendClick = () => {
+        if (message !== '') {
+            setMessages(prevMessages => [...prevMessages, { text: message, sender: 'me' }]);
+            setMessage('');
+            humanChatMessage(sessionId, message).then((response) => {
+                setMessages(prevMessages => [...prevMessages, { text: response.msg, sender: 'other' }]);
+            })
+        }
+
+    }
+
+    return (
+        <div className="flex flex-col h-screen">
+            <div className="flex-grow overflow-y-auto p-6">
+                <div className="top-part">
+                    <Icon icon="mdi:arrow-left" className="back-button" onClick={() => navigate(-1)} />
+                    <div>
+                        <div className="w-40 h-40 mx-auto mb-2 p-4 rounded-full border-2 border-dashed border-gray-300 relative">
+                            <span className="text-4xl uppercase font-semibold text-gray-400 absolute top-1/2 left-1/2 transform -translate-x-1/2 -translate-y-1/2">{user.name[0]}</span>
+                        </div>
+                        <h2 className='font-bold'>{user.name}</h2>
+                    </div>
+                </div>
+                <div className="chat-area">
+                    {messages.length === 0 ? (
+                        <p className='subtext'>Say hi to your chat partner and introduce yourself!</p>
+                    ) : (
+                        messages.map((message, index) => (
+                            <div key={index} className={`message ${message.sender}`}>
+                                <p>{message.text}</p>
+                            </div>
+                        ))
+                    )}
+                    <div ref={messageEndRef} />
+                </div>
+            </div>
+            <div className="flex justify-between p-3 bg-white">
+                <input
+                    className='flex-1 mr-3'
+                    type="text"
+                    value={message}
+                    onChange={(e) => setMessage(e.target.value)}
+                    placeholder='Type a message...'
+                />
+                <button className="w-auto" onClick={handleSendClick}>
+                    <Icon icon="mdi:send" />
+                </button>
+            </div>
+        </div>
+    )
+}

frontend/src/pages/Welcome.tsx

@@ -1,10 +1,18 @@
 import DuoSplash from "../assets/img/duo-splash.png";
 import { useNavigate } from "react-router-dom";
+import {isLoggedIn} from "../logic/sdk";
+import {useEffect} from "react";
 
 export default function Welcome()
 {
   const navigate = useNavigate();
 
+  useEffect(() => {
+    if (isLoggedIn()) {
+      navigate("/courses");
+    }
+  }, []);
+
   return <div className="flex flex-col h-screen justify-center">
     <div className="flex flex-col p-5 gap-5 items-center">
       <img src={DuoSplash} alt="Duolingo Logo"></img>

frontend/yarn.lock

@@ -7905,6 +7905,11 @@ react-scripts@^5.0.1:
   optionalDependencies:
     fsevents "^2.3.2"
 
+react-spinners@^0.13.8:
+  version "0.13.8"
+  resolved "https://registry.yarnpkg.com/react-spinners/-/react-spinners-0.13.8.tgz#5262571be0f745d86bbd49a1e6b49f9f9cb19acc"
+  integrity sha512-3e+k56lUkPj0vb5NDXPVFAOkPC//XyhKPJjvcGjyMNPWsBKpplfeyialP74G7H7+It7KzhtET+MvGqbKgAqpZA==
+
 react@^18.2.0:
   version "18.2.0"
   resolved "https://registry.yarnpkg.com/react/-/react-18.2.0.tgz#555bd98592883255fa00de14f1151a917b5d77d5"