feat(pdf): 添加PDF文件列表功能并优化报告页面

- 新增PDF文件列表页面，显示服务器上所有历史PDF报告
- 在报告页面添加"更早的"按钮链接到PDF列表
- 将历史PDF链接显示从30天改为7天
- 优化PDF生成错误处理和日志记录
- 更新按钮文字描述为"预览PDF模板"

core/templates/core/index.html

@@ -70,7 +70,7 @@
                             <a href="{% url 'today_records' %}" class="btn btn-outline-primary mb-2">添加今日信息</a>
                             <a href="{% url 'yesterday_records' %}" class="btn btn-outline-primary mb-2">追加昨日信息</a>
                             <a href="{% url 'today_plan' %}" class="btn btn-outline-primary mb-2">管理今日计划</a>
-                            <a href="{% url 'generate_report' %}" class="btn btn-outline-primary mb-2">查看今日报告</a>
+                            <a href="{% url 'generate_report' %}" class="btn btn-outline-primary mb-2">预览家庭日报PDF模板</a>
                             <a href="{% url 'send_email' %}" class="btn btn-outline-success">发送今日邮件</a>
                         </div>
                     </div>

core/templates/core/pdf_list.html

@@ -0,0 +1,43 @@
+{% extends 'core/base.html' %}
+
+{% block content %}
+<h2>PDF文件列表</h2>
+
+<div class="card">
+    <div class="card-header bg-primary text-white">
+        <h5 class="card-title mb-0">服务器上的PDF文件</h5>
+    </div>
+    <div class="card-body">
+        {% if pdf_files %}
+        <table class="table table-striped">
+            <thead>
+                <tr>
+                    <th>日期</th>
+                    <th>文件名</th>
+                    <th>操作</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for pdf in pdf_files %}
+                <tr>
+                    <td>{{ pdf.date }}</td>
+                    <td>{{ pdf.filename }}</td>
+                    <td>
+                        <a href="{% url 'generate_pdf_report' pdf.date_str %}" class="btn btn-primary btn-sm" target="_blank">
+                            <i class="bi bi-file-pdf"></i> 查看
+                        </a>
+                    </td>
+                </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+        {% else %}
+        <p class="text-muted">服务器上没有PDF文件</p>
+        {% endif %}
+    </div>
+</div>
+
+<a href="{% url 'generate_report' %}" class="btn btn-secondary mt-3">
+    <i class="bi bi-arrow-left"></i> 返回报告页面
+</a>
+{% endblock %}

core/templates/core/report.html

@@ -4,13 +4,13 @@
 <h2>家庭日报报告</h2>
 
 <div class="mb-4">
-    <a href="{% url 'generate_pdf_report' today|date:'Y-m-d' %}" class="btn btn-primary">
-        <i class="bi bi-file-pdf"></i> 生成PDF报告
-    </a>
-    <a href="{% url 'send_email' %}" class="btn btn-success">
-        <i class="bi bi-envelope"></i> 发送邮件
-    </a>
-</div>
+        <a href="{% url 'generate_pdf_report' today|date:'Y-m-d' %}" class="btn btn-primary" target="_blank">
+            <i class="bi bi-file-pdf"></i> 预览PDF模板
+        </a>
+        <a href="{% url 'send_email' %}" class="btn btn-success">
+            <i class="bi bi-envelope"></i> 发送邮件
+        </a>
+    </div>
 
 <div class="card">
     <div class="card-header bg-primary text-white">
@@ -182,6 +182,13 @@
                 </a>
             </div>
             {% endfor %}
+            {% if has_earlier_pdfs %}
+            <div class="col-md-3 mb-2">
+                <a href="{% url 'pdf_list' %}" class="btn btn-outline-secondary btn-sm btn-block">
+                    更早的
+                </a>
+            </div>
+            {% endif %}
         </div>
     </div>
 </div>

core/urls.py

@@ -46,4 +46,7 @@ urlpatterns = [
     
     # 手动发送邮件
     path('send-email/', views.send_email, name='send_email'),
+    
+    # PDF文件列表
+    path('pdf-list/', views.pdf_list, name='pdf_list'),
 ]

core/views.py

@@ -435,12 +435,27 @@ def generate_report(request):
     # 获取家庭事项统计
     family_task_stats = FamilyTask.objects.values('type').annotate(count=Count('id'))
     
-    # 获取过去30天的日期列表，用于生成历史PDF链接
+    # 获取最近7天的日期列表，用于生成历史PDF链接
     historical_dates = []
-    for i in range(1, 31):
+    for i in range(1, 8):
         historical_date = today - timedelta(days=i)
         historical_dates.append(historical_date)
     
+    # 检查是否有更早的PDF文件
+    has_earlier_pdfs = False
+    seven_days_ago = today - timedelta(days=7)
+    pdf_files = [f for f in os.listdir(settings.REPORTS_ROOT) if f.endswith('.pdf')]
+    for pdf_file in pdf_files:
+        try:
+            # 从文件名中提取日期
+            date_str = pdf_file.replace('report_', '').replace('.pdf', '')
+            file_date = datetime.strptime(date_str, '%Y-%m-%d').date()
+            if file_date < seven_days_ago:
+                has_earlier_pdfs = True
+                break
+        except Exception:
+            continue
+    
     context = {
         'today': today,
         'yesterday': yesterday,
@@ -449,6 +464,7 @@ def generate_report(request):
         'today_plan': today_plan,
         'family_task_stats': family_task_stats,
         'historical_dates': historical_dates,
+        'has_earlier_pdfs': has_earlier_pdfs,
     }
     
     return render(request, 'core/report.html', context)
@@ -487,47 +503,52 @@ def generate_pdf_report(request, date):
         return HttpResponse("PDF功能不可用，请检查WeasyPrint库是否正确安装", status=500)
     
     logger.info(f"用户生成PDF报告: {date}")
-    report_date = datetime.strptime(date, '%Y-%m-%d').date()
-    yesterday = report_date - timedelta(days=1)
     
-    # 获取指定日期的记录
-    yesterday_reading = ReadingRecord.objects.filter(date=yesterday)
-    yesterday_insight = InsightRecord.objects.filter(date=yesterday)
-    today_plan = TodayPlan.objects.filter(date=report_date)
-    
-    # 获取家庭事项统计
-    family_task_stats = FamilyTask.objects.values('type').annotate(count=Count('id'))
-    
-    context = {
-        'today': report_date,
-        'yesterday': yesterday,
-        'yesterday_reading': yesterday_reading,
-        'yesterday_insight': yesterday_insight,
-        'today_plan': today_plan,
-        'family_task_stats': family_task_stats,
-    }
-    
-    # 渲染HTML模板
-    html_string = render(request, 'core/report_pdf.html', context).content.decode('utf-8')
-    
-    # 生成PDF
-    pdf_file = f"report_{date}.pdf"
-    pdf_path = os.path.join(settings.REPORTS_ROOT, pdf_file)
-    
-    # 确保报告目录存在
-    os.makedirs(settings.REPORTS_ROOT, exist_ok=True)
-    
-    # 动态导入WeasyPrint
-    from weasyprint import HTML
-    HTML(string=html_string).write_pdf(pdf_path)
-    
-    logger.info(f"PDF报告生成成功: {pdf_path}")
-    
-    # 返回PDF文件
-    with open(pdf_path, 'rb') as f:
-        response = HttpResponse(f.read(), content_type='application/pdf')
-        response['Content-Disposition'] = f'attachment; filename="{pdf_file}"'
-        return response
+    try:
+        report_date = datetime.strptime(date, '%Y-%m-%d').date()
+        yesterday = report_date - timedelta(days=1)
+        
+        # 获取指定日期的记录
+        yesterday_reading = ReadingRecord.objects.filter(date=yesterday)
+        yesterday_insight = InsightRecord.objects.filter(date=yesterday)
+        today_plan = TodayPlan.objects.filter(date=report_date)
+        
+        # 获取家庭事项统计
+        family_task_stats = FamilyTask.objects.values('type').annotate(count=Count('id'))
+        
+        context = {
+            'today': report_date,
+            'yesterday': yesterday,
+            'yesterday_reading': yesterday_reading,
+            'yesterday_insight': yesterday_insight,
+            'today_plan': today_plan,
+            'family_task_stats': family_task_stats,
+        }
+        
+        # 渲染HTML模板
+        html_string = render(request, 'core/report_pdf.html', context).content.decode('utf-8')
+        
+        # 生成PDF
+        pdf_file = f"report_{date}.pdf"
+        pdf_path = os.path.join(settings.REPORTS_ROOT, pdf_file)
+        
+        # 确保报告目录存在
+        os.makedirs(settings.REPORTS_ROOT, exist_ok=True)
+        
+        # 动态导入WeasyPrint
+        from weasyprint import HTML
+        HTML(string=html_string).write_pdf(pdf_path)
+        
+        logger.info(f"PDF报告生成成功: {pdf_path}")
+        
+        # 返回PDF文件
+        with open(pdf_path, 'rb') as f:
+            response = HttpResponse(f.read(), content_type='application/pdf')
+            response['Content-Disposition'] = f'attachment; filename="{pdf_file}"'
+            return response
+    except Exception as e:
+        logger.error(f"生成PDF报告失败: {str(e)}")
+        return HttpResponse(f"生成PDF报告失败: {str(e)}", status=500)
 
 # 系统配置
 def system_settings(request):
@@ -625,3 +646,36 @@ def send_email_view(request):
 def send_email(request):
     """发送邮件别名"""
     return send_email_view(request)
+
+# PDF文件列表
+def pdf_list(request):
+    """显示服务器上已有的PDF文件列表"""
+    logger.info("用户访问PDF文件列表页面")
+    
+    # 获取所有PDF文件
+    pdf_files = [f for f in os.listdir(settings.REPORTS_ROOT) if f.endswith('.pdf')]
+    
+    # 解析文件名，提取日期，并按日期降序排序
+    pdf_info = []
+    for pdf_file in pdf_files:
+        try:
+            # 从文件名中提取日期
+            date_str = pdf_file.replace('report_', '').replace('.pdf', '')
+            file_date = datetime.strptime(date_str, '%Y-%m-%d').date()
+            pdf_info.append({
+                'filename': pdf_file,
+                'date': file_date,
+                'date_str': date_str
+            })
+        except Exception as e:
+            logger.error(f"解析PDF文件名失败: {pdf_file}, 错误: {str(e)}")
+            continue
+    
+    # 按日期降序排序
+    pdf_info.sort(key=lambda x: x['date'], reverse=True)
+    
+    context = {
+        'pdf_files': pdf_info
+    }
+    
+    return render(request, 'core/pdf_list.html', context)