feat: add question bank schema

Made-with: Cursor

src/db/schema/index.ts

@@ -4,3 +4,6 @@ export * from './sessions.js';
 export * from './subscriptions.js';
 export * from './tests.js';
 export * from './testQuestions.js';
+export * from './questionBank.js';
+export * from './questionCacheMeta.js';
+export * from './questionReports.js';

src/db/schema/questionBank.ts

@@ -0,0 +1,22 @@
+import { pgTable, uuid, text, integer, timestamp } from 'drizzle-orm/pg-core';
+import { jsonb } from 'drizzle-orm/pg-core';
+import { stackEnum, levelEnum, questionTypeEnum, questionStatusEnum, questionSourceEnum } from './enums.js';
+
+export const questionBank = pgTable('question_bank', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  stack: stackEnum('stack').notNull(),
+  level: levelEnum('level').notNull(),
+  type: questionTypeEnum('type').notNull(),
+  questionText: text('question_text').notNull(),
+  options: jsonb('options').$type<Array<{ key: string; text: string }>>(),
+  correctAnswer: jsonb('correct_answer').$type<string | string[]>().notNull(),
+  explanation: text('explanation').notNull(),
+  status: questionStatusEnum('status').notNull().default('pending'),
+  source: questionSourceEnum('source').notNull(),
+  usageCount: integer('usage_count').notNull().default(0),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  approvedAt: timestamp('approved_at', { withTimezone: true }),
+});
+
+export type QuestionBank = typeof questionBank.$inferSelect;
+export type NewQuestionBank = typeof questionBank.$inferInsert;

src/db/schema/questionCacheMeta.ts

@@ -0,0 +1,18 @@
+import { pgTable, uuid, varchar, integer, timestamp } from 'drizzle-orm/pg-core';
+import { jsonb } from 'drizzle-orm/pg-core';
+import { questionBank } from './questionBank.js';
+
+export const questionCacheMeta = pgTable('question_cache_meta', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  questionBankId: uuid('question_bank_id')
+    .notNull()
+    .references(() => questionBank.id, { onDelete: 'cascade' }),
+  llmModel: varchar('llm_model', { length: 100 }).notNull(),
+  promptHash: varchar('prompt_hash', { length: 64 }).notNull(),
+  generationTimeMs: integer('generation_time_ms').notNull(),
+  rawResponse: jsonb('raw_response').$type<unknown>(),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+});
+
+export type QuestionCacheMeta = typeof questionCacheMeta.$inferSelect;
+export type NewQuestionCacheMeta = typeof questionCacheMeta.$inferInsert;

src/db/schema/questionReports.ts

@@ -0,0 +1,21 @@
+import { pgTable, uuid, text, timestamp } from 'drizzle-orm/pg-core';
+import { reportStatusEnum } from './enums.js';
+import { questionBank } from './questionBank.js';
+import { users } from './users.js';
+
+export const questionReports = pgTable('question_reports', {
+  id: uuid('id').primaryKey().defaultRandom(),
+  questionBankId: uuid('question_bank_id')
+    .notNull()
+    .references(() => questionBank.id, { onDelete: 'cascade' }),
+  userId: uuid('user_id')
+    .notNull()
+    .references(() => users.id, { onDelete: 'cascade' }),
+  reason: text('reason').notNull(),
+  status: reportStatusEnum('status').notNull().default('open'),
+  createdAt: timestamp('created_at', { withTimezone: true }).notNull().defaultNow(),
+  resolvedAt: timestamp('resolved_at', { withTimezone: true }),
+});
+
+export type QuestionReport = typeof questionReports.$inferSelect;
+export type NewQuestionReport = typeof questionReports.$inferInsert;