export hpgl load from folder

webui/app.py

@@ -29,6 +29,7 @@ app.secret_key = webui_secret_key()
 app.config['MAX_CONTENT_LENGTH'] = webui_max_upload_mb() * 1024 * 1024
 UPLOAD_DIR = os.path.join(ROOT, 'webui', 'uploads')
 os.makedirs(UPLOAD_DIR, exist_ok=True)
+OUTPUT_HPGL_DIR = os.path.join(ROOT, 'output', 'hpgl')
 FONT_DIRS = [
     os.path.join(ROOT, 'font'),
     os.path.join(ROOT, '.git', 'font'),
@@ -119,6 +120,45 @@ def api_text_to_hpgl():
     return jsonify({'ok': True, 'filename': session['upload_filename'], 'preview_url': '/api/svg'})
 
 
+@app.route('/api/hpgl_files')
+def list_hpgl_files():
+    """List HPGL filenames in output/hpgl/."""
+    if not os.path.isdir(OUTPUT_HPGL_DIR):
+        return jsonify({'files': []})
+    files = []
+    for name in sorted(os.listdir(OUTPUT_HPGL_DIR)):
+        if name.startswith('.'):
+            continue
+        path = os.path.join(OUTPUT_HPGL_DIR, name)
+        if not os.path.isfile(path):
+            continue
+        low = name.lower()
+        if low.endswith('.hpgl') or low.endswith('.plt') or '.' not in name:
+            files.append(name)
+    return jsonify({'files': files})
+
+
+@app.route('/api/load_hpgl', methods=['POST'])
+def load_hpgl_from_folder():
+    """Set current program from a file in output/hpgl/."""
+    data = request.get_json() or {}
+    filename = (data.get('filename') or '').strip()
+    if not filename:
+        return jsonify({'error': 'No filename'}), 400
+    if os.path.basename(filename) != filename or '..' in filename:
+        return jsonify({'error': 'Invalid filename'}), 400
+    path = os.path.join(OUTPUT_HPGL_DIR, filename)
+    if not os.path.isfile(path):
+        return jsonify({'error': 'File not found'}), 404
+    try:
+        Program.parsefile(path)
+    except Exception as e:
+        return jsonify({'error': 'Invalid HPGL: {}'.format(str(e))}), 400
+    session['upload_path'] = path
+    session['upload_filename'] = filename
+    return jsonify({'ok': True, 'filename': filename, 'preview_url': '/api/svg'})
+
+
 @app.route('/api/upload', methods=['POST'])
 def upload():
     if 'file' not in request.files:
@@ -144,6 +184,25 @@ def upload():
     })
 
 
+@app.route('/api/download_hpgl')
+def download_hpgl():
+    """Return current program as downloadable HPGL file."""
+    p = _get_program()
+    if p is None:
+        return jsonify({'error': 'No file loaded'}), 404
+    filename = (session.get('upload_filename') or 'export').strip()
+    if not filename.lower().endswith('.hpgl') and not filename.lower().endswith('.plt'):
+        filename = filename + '.hpgl'
+    return (
+        str(p),
+        200,
+        {
+            'Content-Type': 'application/octet-stream',
+            'Content-Disposition': 'attachment; filename="{}"'.format(filename),
+        },
+    )
+
+
 @app.route('/api/dimensions')
 def dimensions():
     """Return current program size in plotter units (e.g. 0.025 mm per unit)."""