完成一个基本的弹幕功能

activity/models.py

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+from django.db import models
+
+# Create your models here.
+
+class ActivitySetting(models.Model):
+    """活动设置模型"""
+    BACKGROUND_POSITION_CHOICES = (
+        ('top-left', '左上角'),
+        ('top-right', '右上角'),
+        ('bottom-left', '左下角'),
+        ('bottom-right', '右下角'),
+        ('center', '居中'),
+    )
+    
+    background_image = models.ImageField(upload_to='activity_media/', verbose_name='背景图片', blank=True, null=True)
+    background_video = models.FileField(upload_to='activity_media/', verbose_name='背景视频', blank=True, null=True)
+    qr_code_image = models.ImageField(upload_to='activity_media/', verbose_name='二维码图片', blank=True, null=True)
+    qr_code_position = models.CharField(max_length=20, choices=BACKGROUND_POSITION_CHOICES, default='bottom-right', verbose_name='二维码位置')
+    qr_code_margin_top = models.IntegerField(default=20, verbose_name='距离上边距(px)')
+    qr_code_margin_left = models.IntegerField(default=20, verbose_name='距离左边距(px)')
+    qr_code_margin_bottom = models.IntegerField(default=20, verbose_name='距离下边距(px)')
+    qr_code_margin_right = models.IntegerField(default=20, verbose_name='距离右边距(px)')
+    danmu_font_color = models.CharField(max_length=7, default='#FFFFFF', verbose_name='弹幕字体颜色')
+    danmu_bg_color = models.CharField(max_length=7, default='#000000', verbose_name='弹幕背景颜色')
+    global_bg_color = models.CharField(max_length=7, default='#F0F0F0', verbose_name='全局背景颜色')
+    
+    class Meta:
+        verbose_name = '活动设置'
+        verbose_name_plural = '活动设置'
+    
+    def __str__(self):
+        return '活动设置'
+
+class Blessing(models.Model):
+    """祝福语模型"""
+    content = models.TextField(verbose_name='祝福语内容')
+    
+    class Meta:
+        verbose_name = '祝福语'
+        verbose_name_plural = '祝福语'
+    
+    def __str__(self):
+        return self.content[:20]
+
+class Danmu(models.Model):
+    """弹幕消息模型"""
+    name = models.CharField(max_length=50, verbose_name='姓名')
+    content = models.TextField(verbose_name='祝福语', blank=True, null=True)
+    image = models.ImageField(upload_to='danmu_media/', verbose_name='图片', blank=True, null=True)
+    is_approved = models.BooleanField(default=False, verbose_name='审核状态')
+    created_at = models.DateTimeField(auto_now_add=True, verbose_name='创建时间')
+    
+    class Meta:
+        verbose_name = '弹幕消息'
+        verbose_name_plural = '弹幕消息'
+        ordering = ['-created_at']
+    
+    def __str__(self):
+        return f'{self.name}: {self.content[:20]}'