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feat: 用户行为信誉分系统

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- User 新增 credit_score 字段（0-200，默认100）
- 信誉分影响检测阈值系数：高分降低敏感度，低分提高敏感度
- 发布成功+1分，被拦截-2分；申诉通过+10分，驳回-5分
- 新增手动调整和批量重算信誉分接口
- admin-users 页面显示信誉分进度条，支持编辑调整

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
刘正航
2026-04-21 23:52:47 +08:00
parent 5279816452
commit 6d62120443
8 changed files with 166 additions and 10 deletions
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2
backend/app/models.py
View File

@@ -16,6 +16,7 @@ class User(db.Model):
title = db.Column(db.String(64), default="")
phone = db.Column(db.String(32), default="")
is_admin = db.Column(db.Boolean, default=False)
credit_score = db.Column(db.Integer, default=100) # 信誉分 0-200，默认100
created_at = db.Column(db.DateTime, default=datetime.utcnow)
updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
@@ -40,6 +41,7 @@ class User(db.Model):
"title": self.title,
"phone": self.phone,
"is_admin": self.is_admin,
"credit_score": self.credit_score,
"created_at": self.created_at.isoformat() if self.created_at else None,
"updated_at": self.updated_at.isoformat() if self.updated_at else None,
}

82
backend/app/routes/admin_routes.py
View File

@@ -309,11 +309,17 @@ def process_appeal(post_id: int):
row.prediction = "ham"
row.manual_review_status = "approved_ham"
_upsert_manual_sample(row.text, "ham", admin.id if admin else None)
# 申诉通过，增加用户信誉分
if row.author:
row.author.credit_score = min(200, (row.author.credit_score or 100) + 10)
else:
row.status = "blocked"
row.prediction = "spam"
row.manual_review_status = "confirmed_spam"
_upsert_manual_sample(row.text, "spam", admin.id if admin else None)
# 申诉驳回，减少用户信誉分
if row.author:
row.author.credit_score = max(0, (row.author.credit_score or 100) - 5)
db.session.commit()
return ok(_serialize_post(row), "申诉处理完成")
@@ -404,6 +410,12 @@ def update_user(user_id: int):
user.phone = (payload.get("phone") or "").strip()
if "is_admin" in payload:
user.is_admin = bool(payload.get("is_admin"))
if "credit_score" in payload:
try:
credit = int(payload.get("credit_score", 100))
user.credit_score = max(0, min(200, credit))
except Exception:
pass
if payload.get("password"):
if len(payload["password"]) < 6:
return fail("密码至少6位", 400)
@@ -427,3 +439,73 @@ def delete_user(user_id: int):
db.session.commit()
return ok({}, "用户已删除")
@admin_bp.put("/users/<int:user_id>/credit")
@admin_required
def update_user_credit(user_id: int):
"""手动调整用户信誉分"""
user = User.query.get(user_id)
if not user:
return fail("用户不存在", 404)
payload = request.get_json(silent=True) or {}
try:
credit = int(payload.get("credit_score", user.credit_score or 100))
credit = max(0, min(200, credit))
except Exception:
return fail("信誉分必须是0-200之间的整数", 400)
user.credit_score = credit
db.session.commit()
return ok(user.to_dict(), "信誉分已更新")
@admin_bp.post("/users/recalculate-credit")
@admin_required
def recalculate_all_credit():
"""根据用户发布历史和申诉通过率重新计算信誉分"""
users = User.query.filter_by(is_admin=False).all()
updated_count = 0
for user in users:
posts = ContentPost.query.filter_by(user_id=user.id).all()
if not posts:
continue
# 计算发布成功率
published_count = sum(1 for p in posts if p.status == "published")
blocked_count = sum(1 for p in posts if p.status == "blocked")
total_count = len(posts)
if total_count == 0:
continue
publish_ratio = published_count / total_count
# 计算申诉通过率
appeals = [p for p in posts if p.appeal_status != "none"]
approved_appeals = sum(1 for p in appeals if p.appeal_status == "approved")
appeal_ratio = approved_appeals / len(appeals) if appeals else 0
# 基础信誉分：发布成功率贡献
base_score = 100
if publish_ratio >= 0.9:
base_score += 30 # 90%以上发布成功，+30
elif publish_ratio >= 0.7:
base_score += 15 # 70%以上，+15
elif publish_ratio < 0.5:
base_score -= 20 # 低于50%，-20
# 申诉通过率贡献
if appeal_ratio >= 0.8 and len(appeals) >= 3:
base_score += 20 # 80%以上申诉通过且有3次以上申诉，+20
elif appeal_ratio >= 0.5 and len(appeals) >= 2:
base_score += 10
# 限制范围
user.credit_score = max(0, min(200, base_score))
updated_count += 1
db.session.commit()
return ok({"updated_count": updated_count}, "信誉分批量重算完成")

29
backend/app/routes/content_routes.py
View File

@@ -77,12 +77,22 @@ def _resolve_recipient(payload: dict, visibility: str, current_user_id: int):
return recipient, None
def _predict_and_decide(text: str) -> tuple[dict, float, bool]:
def _predict_and_decide(text: str, user_credit: int = 100) -> tuple[dict, float, bool]:
"""根据用户信誉分调整阈值系数。信誉分越高，阈值越高（降低敏感度）"""
clf = _ensure_ready()
result = clf.predict(text)
threshold = float(_get_config().spam_threshold)
blocked = float(result["spam_probability"]) >= threshold
return result, threshold, blocked
base_threshold = float(_get_config().spam_threshold)
# 信誉分影响阈值系数：credit 0-200，默认100
# credit > 100：阈值提高（降低敏感度，减少误判）
# credit < 100：阈值降低（提高敏感度，加强拦截）
# 系数范围：0.85 - 1.15
credit_factor = 1.0 + (user_credit - 100) * 0.0015 # 每10分变化1.5%
credit_factor = max(0.85, min(1.15, credit_factor))
adjusted_threshold = base_threshold * credit_factor
blocked = float(result["spam_probability"]) >= adjusted_threshold
return result, adjusted_threshold, blocked
@content_bp.post("/publish")
@@ -103,7 +113,7 @@ def publish_text():
if err:
return fail(err, 400)
result, threshold, blocked = _predict_and_decide(text)
result, threshold, blocked = _predict_and_decide(text, user.credit_score or 100)
post = ContentPost(
user_id=user.id,
@@ -134,6 +144,13 @@ def publish_text():
db.session.add(post)
db.session.add(detect_log)
# 发布成功（未被拦截），小幅增加信誉分；被拦截则小幅减少
if not blocked:
user.credit_score = min(200, (user.credit_score or 100) + 1)
else:
user.credit_score = max(0, (user.credit_score or 100) - 2)
db.session.commit()
feedback = "发布成功" if not blocked else "疑似垃圾信息，系统已拦截，可提交申诉"
@@ -171,7 +188,7 @@ def edit_post(post_id: int):
if err:
return fail(err, 400)
result, threshold, blocked = _predict_and_decide(text)
result, threshold, blocked = _predict_and_decide(text, user.credit_score or 100)
post.text = result["text"]
post.visibility = visibility

13
backend/app/routes/spam_routes.py
View File

@@ -32,6 +32,15 @@ def _threshold() -> float:
return float(row.spam_threshold) if row else 0.75
def _adjusted_threshold(user_credit: int = 100) -> float:
"""根据用户信誉分调整阈值"""
base_threshold = _threshold()
# 系数范围：0.85 - 1.15
credit_factor = 1.0 + (user_credit - 100) * 0.0015
credit_factor = max(0.85, min(1.15, credit_factor))
return base_threshold * credit_factor
@spam_bp.post("/predict")
@jwt_required()
def predict_one():
@@ -46,7 +55,7 @@ def predict_one():
clf = _ensure_ready()
result = clf.predict(text)
threshold = _threshold()
threshold = _adjusted_threshold(user.credit_score or 100)
blocked = float(result["spam_probability"]) >= threshold
row = SpamPredictionLog(
@@ -82,7 +91,7 @@ def predict_batch():
clf = _ensure_ready()
rows = []
results = []
threshold = _threshold()
threshold = _adjusted_threshold(user.credit_score or 100)
for text in items:
content = (text or "").strip()

10
backend/sql/update_credit_score.sql Normal file
View File

@@ -0,0 +1,10 @@
-- 用户信誉分字段
-- 执行方式：mysql -u root -p database_name < update_credit_score.sql
-- 新增用户信誉分字段（范围 0-200，默认 100）
ALTER TABLE users
ADD COLUMN credit_score INT DEFAULT 100 COMMENT '用户信誉分（0-200，默认100）'
AFTER is_admin;
-- 更新索引（可选，便于按信誉分排序查询）
-- ALTER TABLE users ADD INDEX idx_credit_score (credit_score);

26
miniprogram/app.wxss
View File

@@ -460,6 +460,32 @@ button.btn::after {
color: var(--sub);
}
/* 信誉分进度条 */
.credit-score-bar {
position: relative;
width: 180rpx;
height: 28rpx;
border-radius: 14rpx;
background: rgba(85, 123, 166, 0.25);
overflow: hidden;
}
.credit-fill {
height: 100%;
border-radius: inherit;
background: linear-gradient(90deg, var(--success), var(--accent));
}
.credit-value {
position: absolute;
right: 8rpx;
top: 50%;
transform: translateY(-50%);
font-size: 22rpx;
font-weight: 600;
color: #f2f7ff;
}
.chip-group {
display: flex;
flex-wrap: wrap;

6
miniprogram/pages/admin-users/index.js
View File

@@ -12,7 +12,8 @@ Page({
title: '',
phone: '',
is_admin: false,
password: ''
password: '',
credit_score: 100
},
importText: '[{"username":"operator01","password":"123456","nickname":"运营同学","company":"示例科技公司"}]'
},
@@ -60,7 +61,8 @@ Page({
title: row.title || '',
phone: row.phone || '',
is_admin: !!row.is_admin,
password: ''
password: '',
credit_score: row.credit_score || 100
}
})
},

8
miniprogram/pages/admin-users/index.wxml
View File

@@ -27,6 +27,13 @@
<view class="list-item" wx:for="{{users}}" wx:key="id">
<view class="item-title">{{item.nickname}}（{{item.username}}）</view>
<view class="item-sub">{{item.company || '未填写公司'}} · {{item.title || '未填写岗位'}} · {{item.is_admin ? '管理员' : '普通用户'}}</view>
<view class="row">
<text class="label">信誉分</text>
<view class="credit-score-bar">
<view class="credit-fill" style="width: {{(item.credit_score || 100) / 2}}%;"></view>
<text class="credit-value">{{item.credit_score || 100}}</text>
</view>
</view>
<view wx:if="{{editUserId === item.id}}">
<input class="input" placeholder="昵称" value="{{editForm.nickname}}" data-field="nickname" bindinput="onEditInput" />
@@ -34,6 +41,7 @@
<input class="input" placeholder="岗位" value="{{editForm.title}}" data-field="title" bindinput="onEditInput" />
<input class="input" placeholder="手机号" value="{{editForm.phone}}" data-field="phone" bindinput="onEditInput" />
<input class="input" placeholder="新密码（可选）" password value="{{editForm.password}}" data-field="password" bindinput="onEditInput" />
<input class="input" placeholder="信誉分（0-200）" type="number" value="{{editForm.credit_score}}" data-field="credit_score" bindinput="onEditInput" />
<view class="row">
<text class="label">管理员权限</text>