From 2780e8de22c9134b2241006d092d9226587489b0 Mon Sep 17 00:00:00 2001
From: Mykola Borchuk <mykola.borchuk@automat-it.com>
Date: Sun, 26 Apr 2026 15:34:39 +0200
Subject: [PATCH] feat: sign report PDFs with visual/digital signatures
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Reports page shows signing checkboxes when pdf_sign capabilities are
available (from pdf_signature module). After PDF generation, selected
signatures are applied before download/ZIP.

Uses existing pdf_sign capability contract — reports module doesn't
know about pdf_signature module directly.
---
 modules/reports/index.py               | 15 +++++++++++++++
 modules/reports/templates/reports.html | 17 +++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/modules/reports/index.py b/modules/reports/index.py
index d403d6f..f554c52 100644
--- a/modules/reports/index.py
+++ b/modules/reports/index.py
@@ -286,6 +286,21 @@ def _generate_report(self):
             buffer = io.BytesIO()
             template_module.generate_report(buffer, report_data, settings)
 
+            # Apply PDF signatures if requested
+            if mgr:
+                signers = mgr.find_capabilities('pdf_sign')
+                selected_signers = [i for i in range(len(signers))
+                                    if request.form.get(f'sign_cap_{i}')]
+                if selected_signers:
+                    pdf_bytes = buffer.getvalue()
+                    for idx in selected_signers:
+                        try:
+                            pdf_bytes = signers[idx]['action'](pdf_bytes)
+                        except Exception as e:
+                            self.logger.error('Report signing failed (%s): %s',
+                                              signers[idx].get('name', '?'), e)
+                    buffer = io.BytesIO(pdf_bytes)
+
             # Check if any section requested file inclusion
             include_files = {}
             if mgr:
diff --git a/modules/reports/templates/reports.html b/modules/reports/templates/reports.html
index 7b9cf4b..e0976d3 100644
--- a/modules/reports/templates/reports.html
+++ b/modules/reports/templates/reports.html
@@ -124,6 +124,23 @@ <h4 style="margin-bottom: 15px; color: #333;">Additional Options</h4>
                 <label class="check-label"><input type="checkbox" name="include_cancelled" value="1"> Include cancelled invoices</label>
                 <label class="check-label"><input type="checkbox" name="detailed_view" value="1" checked> Detailed view (show all transactions)</label>
             </div>
+            <!-- PDF Signing -->
+            {% if module_manager %}
+                {% set signers = module_manager.find_capabilities('pdf_sign') %}
+                {% if signers %}
+                <div style="margin-top: 15px;">
+                    <label style="margin-bottom: 8px;">Sign Report PDF</label>
+                    <div style="display: flex; flex-direction: column; gap: 6px; margin-left: 2px;">
+                        {% for cap in signers %}
+                        <label class="check-label">
+                            <input type="checkbox" name="sign_cap_{{ loop.index0 }}" value="1">
+                            ✍️ {{ cap.name }}
+                        </label>
+                        {% endfor %}
+                    </div>
+                </div>
+                {% endif %}
+            {% endif %}
         </div>
 
         <!-- Submit Button -->