删除无用代码并且新增流程图相关内容

flowchart/models.py

@@ -0,0 +1,65 @@
+from django.db import models
+from django.contrib.auth import get_user_model
+from utils.shortcuts import rand_str
+from problem.models import Problem
+
+User = get_user_model()
+
+class FlowchartSubmissionStatus:
+    PENDING = 0      # 等待AI评分
+    PROCESSING = 1   # AI评分中
+    COMPLETED = 2    # 评分完成
+    FAILED = 3       # 评分失败
+
+class FlowchartSubmission(models.Model):
+    """流程图提交模型"""
+    id = models.TextField(default=rand_str, primary_key=True, db_index=True)
+    
+    # 基础信息
+    user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='flowchart_submissions')
+    problem = models.ForeignKey(Problem, on_delete=models.CASCADE, related_name='flowchart_submissions')
+    
+    # 提交内容
+    mermaid_code = models.TextField()  # Mermaid代码
+    flowchart_data = models.JSONField(default=dict)  # 流程图元数据
+    
+    # 状态信息
+    status = models.IntegerField(default=FlowchartSubmissionStatus.PENDING)
+    create_time = models.DateTimeField(auto_now_add=True)
+    
+    # AI评分结果
+    ai_score = models.FloatField(null=True, blank=True)  # AI评分 (0-100)
+    ai_grade = models.CharField(max_length=10, null=True, blank=True)  # 等级 (S/A/B/C)
+    ai_feedback = models.TextField(null=True, blank=True)  # AI反馈
+    ai_suggestions = models.TextField(null=True, blank=True)  # AI建议
+    ai_criteria_details = models.JSONField(default=dict)  # 详细评分标准
+    
+    # 处理信息
+    ai_provider = models.CharField(max_length=50, default='deepseek')
+    ai_model = models.CharField(max_length=50, default='deepseek-chat')
+    processing_time = models.FloatField(null=True, blank=True)  # AI处理耗时(秒)
+    evaluation_time = models.DateTimeField(null=True, blank=True) # 评分完成时间
+    
+    
+    class Meta:
+        db_table = 'flowchart_submission'
+        ordering = ['-create_time']
+        indexes = [
+            models.Index(fields=['user', 'create_time'], name='flowchart_user_time_idx'),
+            models.Index(fields=['problem', 'create_time'], name='flowchart_problem_time_idx'),
+            models.Index(fields=['status'], name='flowchart_status_idx'),
+        ]
+    
+    def __str__(self):
+        return f"FlowchartSubmission {self.id}"
+    
+    def check_user_permission(self, user, check_share=True):
+        """检查用户权限"""
+        if (
+            self.user_id == user.id
+            or not user.is_regular_user()
+            or self.problem.created_by_id == user.id
+        ):
+            return True
+        
+        return False