feat: phase1 platform upgrade with moderation, dev payments, admin panel and landing updates

apps/api/src/enrollment/dto/submit-homework.dto.ts

@@ -1,14 +1,33 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsString, MaxLength, MinLength } from 'class-validator';
+import { HomeworkType } from '@coursecraft/database';
+import { IsEnum, IsOptional, IsString, MaxLength, MinLength } from 'class-validator';
 
 export class SubmitHomeworkDto {
   @ApiProperty({
     description: 'Written homework answer',
-    minLength: 50,
+    minLength: 1,
     maxLength: 20000,
   })
+  @IsOptional()
   @IsString()
-  @MinLength(50)
+  @MinLength(1)
   @MaxLength(20000)
-  content: string;
+  content?: string;
+
+  @ApiProperty({ enum: HomeworkType, default: HomeworkType.TEXT })
+  @IsOptional()
+  @IsEnum(HomeworkType)
+  type?: HomeworkType;
+
+  @ApiProperty({ required: false, description: 'File URL for FILE/PROJECT submission' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(1024)
+  attachmentUrl?: string;
+
+  @ApiProperty({ required: false, description: 'GitHub repository URL' })
+  @IsOptional()
+  @IsString()
+  @MaxLength(1024)
+  githubUrl?: string;
 }

apps/api/src/enrollment/enrollment.controller.ts

@@ -83,7 +83,7 @@ export class EnrollmentController {
     @Body() dto: SubmitHomeworkDto,
     @CurrentUser() user: User,
   ): Promise<any> {
-    return this.enrollmentService.submitHomework(user.id, courseId, lessonId, dto.content);
+    return this.enrollmentService.submitHomework(user.id, courseId, lessonId, dto);
   }
 
   @Post(':courseId/review')

apps/api/src/enrollment/enrollment.service.ts

@@ -6,7 +6,7 @@ import {
   NotFoundException,
 } from '@nestjs/common';
 import { PrismaService } from '../common/prisma/prisma.service';
-import { HomeworkReviewStatus } from '@coursecraft/database';
+import { HomeworkReviewStatus, HomeworkType } from '@coursecraft/database';
 
 const QUIZ_PASS_THRESHOLD = 70;
 
@@ -172,7 +172,12 @@ export class EnrollmentService {
     return { homework, submission };
   }
 
-  async submitHomework(userId: string, courseId: string, lessonId: string, content: string): Promise<any> {
+  async submitHomework(
+    userId: string,
+    courseId: string,
+    lessonId: string,
+    dto: { content?: string; type?: HomeworkType; attachmentUrl?: string; githubUrl?: string }
+  ): Promise<any> {
     const enrollment = await this.requireEnrollment(userId, courseId);
     await this.assertLessonUnlocked(userId, courseId, lessonId);
 
@@ -184,20 +189,36 @@ export class EnrollmentService {
     }
 
     const { homework } = await this.getHomework(userId, courseId, lessonId);
-    const aiResult = this.gradeHomeworkWithAI(content);
+    const submissionType = dto.type || homework.type || HomeworkType.TEXT;
+    const normalizedContent = (dto.content || '').trim();
+    if (!normalizedContent && !dto.attachmentUrl && !dto.githubUrl) {
+      throw new BadRequestException('Provide content, attachment URL, or GitHub URL');
+    }
+    const fallbackContent =
+      normalizedContent ||
+      dto.githubUrl ||
+      dto.attachmentUrl ||
+      `Submission type: ${submissionType}`;
+    const aiResult = this.gradeHomeworkWithAI(fallbackContent);
 
     const submission = await this.prisma.homeworkSubmission.upsert({
       where: { homeworkId_userId: { homeworkId: homework.id, userId } },
       create: {
         homeworkId: homework.id,
         userId,
-        content,
+        content: fallbackContent,
+        answerType: submissionType,
+        attachmentUrl: dto.attachmentUrl || null,
+        githubUrl: dto.githubUrl || null,
         aiScore: aiResult.score,
         aiFeedback: aiResult.feedback,
         reviewStatus: HomeworkReviewStatus.AI_REVIEWED,
       },
       update: {
-        content,
+        content: fallbackContent,
+        answerType: submissionType,
+        attachmentUrl: dto.attachmentUrl || null,
+        githubUrl: dto.githubUrl || null,
         aiScore: aiResult.score,
         aiFeedback: aiResult.feedback,
         reviewStatus: HomeworkReviewStatus.AI_REVIEWED,