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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 | /** * Classroom Manager Module * * CRUD operations for classrooms: * - Create classroom (one per teacher) * - Get classroom by teacher * - Get classroom by code * - Update classroom settings * - Delete classroom */ import { createId } from '@paralleldrive/cuid2' import { eq } from 'drizzle-orm' import { db } from '@/db' import { classrooms, generateClassroomCode, type Classroom, type NewClassroom, type User, users, } from '@/db/schema' // ============================================================================ // Create Classroom // ============================================================================ export interface CreateClassroomParams { teacherId: string name: string } export interface CreateClassroomResult { success: boolean classroom?: Classroom error?: string } /** * Create a classroom for a teacher * * Each teacher can have exactly one classroom (enforced by unique constraint). * Returns error if teacher already has a classroom. */ export async function createClassroom( params: CreateClassroomParams ): Promise<CreateClassroomResult> { const { teacherId, name } = params // Check if teacher already has a classroom const existing = await db.query.classrooms.findFirst({ where: eq(classrooms.teacherId, teacherId), }) if (existing) { return { success: false, error: 'Teacher already has a classroom' } } // Generate unique code with collision handling let code = generateClassroomCode() let attempts = 0 const maxAttempts = 10 while (attempts < maxAttempts) { const codeExists = await db.query.classrooms.findFirst({ where: eq(classrooms.code, code), }) if (!codeExists) break code = generateClassroomCode() attempts++ } if (attempts >= maxAttempts) { return { success: false, error: 'Failed to generate unique classroom code', } } // Create classroom const [classroom] = await db .insert(classrooms) .values({ id: createId(), teacherId, name, code, }) .returning() return { success: true, classroom } } // ============================================================================ // Read Classroom // ============================================================================ /** * Get a classroom by ID */ export async function getClassroom(classroomId: string): Promise<Classroom | null> { const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.id, classroomId), }) return classroom ?? null } /** * Get a teacher's classroom * * Returns null if the user doesn't have a classroom (not a teacher). */ export async function getTeacherClassroom(teacherId: string): Promise<Classroom | null> { const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.teacherId, teacherId), }) return classroom ?? null } /** * Check if a user is a teacher (has a classroom) */ export async function isTeacher(userId: string): Promise<boolean> { const classroom = await getTeacherClassroom(userId) return classroom !== null } export interface ClassroomWithTeacher extends Classroom { teacher?: User } /** * Get a classroom by join code * * Used when a parent wants to enroll their child using the code. */ export async function getClassroomByCode(code: string): Promise<ClassroomWithTeacher | null> { const normalizedCode = code.toUpperCase().trim() const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.code, normalizedCode), }) if (!classroom) return null const teacher = await db.query.users.findFirst({ where: eq(users.id, classroom.teacherId), }) return { ...classroom, teacher } } // ============================================================================ // Update Classroom // ============================================================================ export interface UpdateClassroomParams { name?: string /** Entry prompt expiry time in minutes. Null = use system default (30 min) */ entryPromptExpiryMinutes?: number | null } /** * Update classroom settings * * Only the teacher can update their classroom. */ export async function updateClassroom( classroomId: string, teacherId: string, updates: UpdateClassroomParams ): Promise<Classroom | null> { // Verify ownership const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.id, classroomId), }) if (!classroom || classroom.teacherId !== teacherId) { return null } const [updated] = await db .update(classrooms) .set(updates) .where(eq(classrooms.id, classroomId)) .returning() return updated } /** * Regenerate classroom join code * * Use this if a teacher wants to invalidate the old code. */ export async function regenerateClassroomCode( classroomId: string, teacherId: string ): Promise<string | null> { // Verify ownership const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.id, classroomId), }) if (!classroom || classroom.teacherId !== teacherId) { return null } // Generate unique code let code = generateClassroomCode() let attempts = 0 const maxAttempts = 10 while (attempts < maxAttempts) { const codeExists = await db.query.classrooms.findFirst({ where: eq(classrooms.code, code), }) if (!codeExists) break code = generateClassroomCode() attempts++ } if (attempts >= maxAttempts) { return null } await db.update(classrooms).set({ code }).where(eq(classrooms.id, classroomId)) return code } // ============================================================================ // Delete Classroom // ============================================================================ /** * Delete a classroom * * Only the teacher can delete their classroom. * All enrollments, requests, and presence records will be cascade deleted. */ export async function deleteClassroom(classroomId: string, teacherId: string): Promise<boolean> { // Verify ownership const classroom = await db.query.classrooms.findFirst({ where: eq(classrooms.id, classroomId), }) if (!classroom || classroom.teacherId !== teacherId) { return false } await db.delete(classrooms).where(eq(classrooms.id, classroomId)) return true } // Re-export code generation function export { generateClassroomCode } from '@/db/schema' |