Initial commit — AI-powered coding tutor (Professor)

Next.js 16, React 19, Monaco editor, Anthropic SDK, multi-provider AI, Wandbox Python execution, iframe HTML preview, SQLite auth + session persistence. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-04 21:48:34 +00:00
commit f644937604
56 changed files with 14012 additions and 0 deletions
--- a/hooks/useAppState.ts
+++ b/hooks/useAppState.ts
@@ -0,0 +1,172 @@
+import { useReducer } from 'react';
+import type { AppState, AppAction } from '@/types';
+
+const initialState: AppState = {
+  phase: 'selecting',
+  appMode: 'homework',
+  topic: null,
+  task: null,
+  code: '',
+  messages: [],
+  classroomMessages: [],
+  lessonContent: null,
+  executionResult: null,
+  streamingContent: '',
+  isStreaming: false,
+  error: null,
+  responseMode: { hintMode: true, strict: false },
+};
+
+function reducer(state: AppState, action: AppAction): AppState {
+  switch (action.type) {
+    case 'SELECT_TOPIC':
+      return {
+        ...initialState,
+        phase: 'loading_task',
+        appMode: state.appMode,
+        topic: action.payload,
+        code: action.payload.starterCode,
+        isStreaming: true,
+        responseMode: state.responseMode,
+      };
+
+    case 'TASK_STREAM_START':
+      return { ...state, phase: 'loading_task', isStreaming: true, streamingContent: '' };
+
+    case 'TASK_STREAM_CHUNK':
+      return { ...state, streamingContent: state.streamingContent + action.payload };
+
+    case 'TASK_STREAM_DONE':
+      return {
+        ...state,
+        phase: 'ready',
+        task: action.payload,
+        code: action.payload.starterCode || state.code,
+        isStreaming: false,
+        streamingContent: '',
+        messages: [],
+      };
+
+    case 'CODE_CHANGE':
+      return { ...state, code: action.payload };
+
+    case 'EXECUTE_START':
+      return { ...state, phase: 'executing', executionResult: null, error: null };
+
+    case 'EXECUTE_DONE':
+      return { ...state, phase: 'ready', executionResult: action.payload };
+
+    case 'REVIEW_START':
+      return {
+        ...state,
+        phase: 'reviewing',
+        isStreaming: true,
+        streamingContent: '',
+        error: null,
+      };
+
+    case 'STREAM_CHUNK':
+      return { ...state, streamingContent: state.streamingContent + action.payload };
+
+    case 'STREAM_DONE':
+      return {
+        ...state,
+        phase: 'ready',
+        isStreaming: false,
+        streamingContent: '',
+        messages: [...state.messages, action.payload],
+      };
+
+    case 'SEND_USER_MESSAGE':
+      return {
+        ...state,
+        isStreaming: true,
+        streamingContent: '',
+        messages: [
+          ...state.messages,
+          {
+            id: crypto.randomUUID(),
+            role: 'user',
+            content: action.payload,
+            timestamp: Date.now(),
+            type: 'chat',
+          },
+        ],
+      };
+
+    case 'SET_APP_MODE':
+      return { ...state, appMode: action.payload };
+
+    case 'LESSON_STREAM_START':
+      return { ...state, isStreaming: true, streamingContent: '', error: null };
+
+    case 'LESSON_STREAM_DONE':
+      return {
+        ...state,
+        isStreaming: false,
+        streamingContent: '',
+        lessonContent: action.payload,
+      };
+
+    case 'SEND_CLASSROOM_MESSAGE':
+      return {
+        ...state,
+        isStreaming: true,
+        streamingContent: '',
+        classroomMessages: [
+          ...state.classroomMessages,
+          {
+            id: crypto.randomUUID(),
+            role: 'user',
+            content: action.payload,
+            timestamp: Date.now(),
+            type: 'chat',
+          },
+        ],
+      };
+
+    case 'CLASSROOM_MESSAGE_DONE':
+      return {
+        ...state,
+        isStreaming: false,
+        streamingContent: '',
+        classroomMessages: [...state.classroomMessages, action.payload],
+      };
+
+    case 'SET_ERROR':
+      return { ...state, phase: 'ready', isStreaming: false, streamingContent: '', error: action.payload };
+
+    case 'CLEAR_ERROR':
+      return { ...state, error: null };
+
+    case 'SET_RESPONSE_MODE':
+      return { ...state, responseMode: { ...state.responseMode, ...action.payload } };
+
+    case 'RESET':
+      return {
+        ...initialState,
+        appMode: state.appMode,
+        responseMode: state.responseMode,
+      };
+
+    case 'RESTORE_SESSION':
+      return {
+        ...initialState,
+        phase: 'ready',
+        appMode: state.appMode,
+        topic: action.payload.topic,
+        task: action.payload.task,
+        code: action.payload.code,
+        messages: action.payload.messages,
+        executionResult: action.payload.executionResult,
+        responseMode: state.responseMode,
+      };
+
+    default:
+      return state;
+  }
+}
+
+export function useAppState() {
+  return useReducer(reducer, initialState);
+}