port print-web-form app to nested flask structure

Replace stub print/ app with full PDF web print service from
~/print-web-form. Adapt UPLOAD_FOLDER to use Path(__file__).parent,
add pypdf dependency, port all tests (10 passing), remove unused static/.

print/app.py

@@ -0,0 +1,105 @@
+import os
+import subprocess
+from pathlib import Path
+
+import pypdf
+from flask import Flask, flash, redirect, render_template, request, url_for
+from werkzeug.utils import secure_filename
+
+UPLOAD_FOLDER = str(Path(__file__).parent / "uploads")
+ALLOWED_EXTENSIONS = {"pdf"}
+PRINTER_NAME = "HL-2270DW_series"
+MAX_PAGES = 10
+
+app = Flask(__name__)
+app.config["UPLOAD_FOLDER"] = UPLOAD_FOLDER
+app.config["SECRET_KEY"] = os.urandom(24)
+app.config["MAX_CONTENT_LENGTH"] = 16 * 1024 * 1024
+
+
+def allowed_file(filename):
+    return "." in filename and filename.rsplit(".", 1)[1].lower() in ALLOWED_EXTENSIONS
+
+
+def get_pdf_page_count(filepath):
+    try:
+        with open(filepath, "rb") as f:
+            reader = pypdf.PdfReader(f)
+            return len(reader.pages)
+    except Exception as e:
+        app.logger.error(f"Could not read PDF pages: {e}")
+        return None
+
+
+@app.route("/", methods=["GET", "POST"])
+def upload_and_print():
+    if request.method == "POST":
+        if "file" not in request.files:
+            flash("No file part in the request.", "error")
+            return redirect(request.url)
+
+        file = request.files["file"]
+
+        if file.filename == "":
+            flash("No file selected. Please choose a PDF to print.", "error")
+            return redirect(request.url)
+
+        if file and allowed_file(file.filename):
+            filename = secure_filename(file.filename)
+            os.makedirs(app.config["UPLOAD_FOLDER"], exist_ok=True)
+            filepath = os.path.join(app.config["UPLOAD_FOLDER"], filename)
+            file.save(filepath)
+
+            try:
+                page_count = get_pdf_page_count(filepath)
+                if page_count is None:
+                    flash(
+                        "Could not process the PDF file. It might be corrupt.", "error"
+                    )
+                    return redirect(request.url)
+
+                if page_count > MAX_PAGES:
+                    flash(
+                        f"Error: File has {page_count} pages. The maximum allowed is {MAX_PAGES}.",
+                        "error",
+                    )
+                    return redirect(request.url)
+
+                app.logger.info(
+                    f"Sending '{filename}' ({page_count} pages) to printer '{PRINTER_NAME}'"
+                )
+                command = ["lp", "-d", PRINTER_NAME, filepath]
+                result = subprocess.run(
+                    command, capture_output=True, text=True, check=True
+                )
+                app.logger.info(f"lp command stdout: {result.stdout}")
+                flash(f"Success! '{filename}' has been sent to the printer.", "success")
+
+            except subprocess.CalledProcessError as e:
+                app.logger.error(f"Error printing file: {e}")
+                app.logger.error(f"lp command stderr: {e.stderr}")
+                flash(
+                    "Error sending file to printer. The printer may be offline or misconfigured.",
+                    "error",
+                )
+
+            except Exception as e:
+                app.logger.error(f"An unexpected error occurred: {e}")
+                flash("An unexpected server error occurred.", "error")
+
+            finally:
+                if os.path.exists(filepath):
+                    os.remove(filepath)
+                    app.logger.info(f"Cleaned up temporary file: {filepath}")
+
+            return redirect(url_for("upload_and_print"))
+
+        else:
+            flash("Invalid file type. Please upload a PDF file.", "error")
+            return redirect(request.url)
+
+    return render_template("index.html", printer_name=PRINTER_NAME, max_pages=MAX_PAGES)
+
+
+if __name__ == "__main__":
+    app.run(host="127.0.0.1", port=57928, debug=False)

print/templates/index.html

@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Web Print Service</title>
+    <script src="https://cdn.tailwindcss.com"></script>
+    <link rel="preconnect" href="https://fonts.googleapis.com">
+    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+    <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap" rel="stylesheet">
+    <style>
+        body {
+            font-family: 'Inter', sans-serif;
+        }
+    </style>
+</head>
+<body class="bg-gray-100 text-gray-800 flex items-center justify-center min-h-screen">
+
+    <div class="w-full max-w-lg mx-auto p-4 md:p-8">
+        <div class="bg-white rounded-2xl shadow-lg p-8">
+            
+            <div class="text-center mb-8">
+                <svg xmlns="http://www.w3.org/2000/svg" class="w-16 h-16 mx-auto text-blue-500 mb-4" viewBox="0 0 24 24" fill="currentColor"><path d="M19 8H5c-1.66 0-3 1.34-3 3v6h4v4h12v-4h4v-6c0-1.66-1.34-3-3-3zm-3 11H8v-5h8v5zm3-7c-.55 0-1-.45-1-1s.45-1 1-1 1 .45 1 1-.45 1-1 1zm-1-9H6v4h12V3z"/></svg>
+                <h1 class="text-3xl font-bold text-gray-900">PDF Web Print</h1>
+                <p class="text-gray-500 mt-2">Upload a PDF to print to <strong>{{ printer_name }}</strong>.</p>
+                <p class="text-sm text-gray-500 mt-1">(Max {{ max_pages }} pages)</p>
+            </div>
+
+            {% with messages = get_flashed_messages(with_categories=true) %}
+                {% if messages %}
+                    <div class="mb-6 space-y-3">
+                    {% for category, message in messages %}
+                        <div class="p-4 rounded-lg text-sm {% if category == 'error' %} bg-red-100 text-red-800 {% else %} bg-green-100 text-green-800 {% endif %}" role="alert">
+                            <span class="font-medium">{% if category == 'error' %}Oops!{% else %}Success!{% endif %}</span> {{ message }}
+                        </div>
+                    {% endfor %}
+                    </div>
+                {% endif %}
+            {% endwith %}
+
+            <form action="/" method="post" enctype="multipart/form-data">
+                <div class="border-2 border-dashed border-gray-300 rounded-lg p-8 text-center bg-gray-50 hover:border-blue-500 transition-colors duration-300">
+                    <label for="file-upload" class="cursor-pointer">
+                        <svg xmlns="http://www.w3.org/2000/svg" class="w-12 h-12 mx-auto text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1">
+                          <path stroke-linecap="round" stroke-linejoin="round" d="M7 16a4 4 0 01-.88-7.903A5 5 0 1115.9 6L16 6a5 5 0 011 9.9M15 13l-3-3m0 0l-3 3m3-3v12" />
+                        </svg>
+                        <p id="file-name" class="mt-4 text-gray-600">
+                            <span class="font-semibold text-blue-600">Click to upload</span>
+                        </p>
+                        <p class="text-xs text-gray-500 mt-1">PDF only, max 16MB.</p>
+                    </label>
+                    <input id="file-upload" name="file" type="file" class="sr-only" accept=".pdf">
+                </div>
+                
+                <div class="mt-8">
+                    <button type="submit" class="w-full bg-blue-600 text-white font-bold py-3 px-4 rounded-lg hover:bg-blue-700 focus:outline-none focus:ring-4 focus:ring-blue-300 transition-all duration-300 transform hover:scale-105">
+                        Print File
+                    </button>
+                </div>
+            </form>
+        </div>
+
+        <footer class="text-center mt-6 text-sm text-gray-500">
+            <p>A simple Flask web app for local printing.</p>
+        </footer>
+    </div>
+
+    <script>
+        const fileUpload = document.getElementById('file-upload');
+        const fileNameDisplay = document.getElementById('file-name');
+        
+        fileUpload.addEventListener('change', () => {
+            if (fileUpload.files.length > 0) {
+                fileNameDisplay.innerHTML = `<span class="font-semibold text-gray-800">${fileUpload.files[0].name}</span>`;
+            } else {
+                fileNameDisplay.innerHTML = `<span class="font-semibold text-blue-600">Click to upload</span> or drag and drop.`;
+            }
+        });
+    </script>
+
+</body>
+</html>

print/tests/conftest.py

@@ -0,0 +1,59 @@
+import io
+import tempfile
+
+import pypdf
+import pytest
+
+from app import app as flask_app, get_pdf_page_count
+
+
+@pytest.fixture
+def app():
+    flask_app.config["TESTING"] = True
+    flask_app.config["UPLOAD_FOLDER"] = tempfile.mkdtemp()
+    flask_app.config["SECRET_KEY"] = "test-secret"
+    yield flask_app
+
+
+@pytest.fixture
+def client(app):
+    return app.test_client()
+
+
+def _make_pdf(num_pages=3):
+    writer = pypdf.PdfWriter()
+    for _ in range(num_pages):
+        writer.add_blank_page(width=612, height=792)
+    buf = io.BytesIO()
+    writer.write(buf)
+    buf.seek(0)
+    return buf
+
+
+@pytest.fixture
+def sample_pdf():
+    return _make_pdf(3).read()
+
+
+@pytest.fixture
+def large_pdf():
+    return _make_pdf(15).read()
+
+
+@pytest.fixture
+def corrupt_file():
+    return b"This is not a PDF at all"
+
+
+@pytest.fixture
+def sample_pdf_path(tmp_path):
+    path = tmp_path / "test.pdf"
+    path.write_bytes(_make_pdf(3).read())
+    return str(path)
+
+
+@pytest.fixture
+def corrupt_file_path(tmp_path):
+    path = tmp_path / "corrupt.pdf"
+    path.write_bytes(b"not a pdf")
+    return str(path)

print/tests/test_pdf_utils.py

@@ -0,0 +1,13 @@
+from app import get_pdf_page_count
+
+
+def test_page_count_valid_pdf(sample_pdf_path):
+    assert get_pdf_page_count(sample_pdf_path) == 3
+
+
+def test_page_count_corrupt_file(corrupt_file_path):
+    assert get_pdf_page_count(corrupt_file_path) is None
+
+
+def test_page_count_nonexistent_file():
+    assert get_pdf_page_count("/nonexistent/file.pdf") is None

print/tests/test_routes.py

@@ -0,0 +1,69 @@
+import io
+import os
+from unittest.mock import patch
+
+
+def test_get_index(client):
+    resp = client.get("/")
+    assert resp.status_code == 200
+    assert b"printer" in resp.data.lower() or b"upload" in resp.data.lower()
+
+
+def test_post_no_file(client):
+    resp = client.post("/", data={}, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"No file part" in resp.data
+
+
+def test_post_empty_filename(client):
+    resp = client.post("/", data={"file": (io.BytesIO(b""), "")}, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"No file selected" in resp.data
+
+
+def test_post_invalid_extension(client):
+    data = {"file": (io.BytesIO(b"hello"), "document.txt")}
+    resp = client.post("/", data=data, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"Invalid file type" in resp.data
+
+
+@patch("app.subprocess.run")
+def test_post_valid_pdf(mock_run, client, app, sample_pdf):
+    mock_run.return_value.stdout = "request-id-123"
+    mock_run.return_value.stderr = ""
+    mock_run.return_value.returncode = 0
+
+    data = {"file": (io.BytesIO(sample_pdf), "test.pdf")}
+    resp = client.post("/", data=data, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"Success" in resp.data
+
+    upload_dir = app.config["UPLOAD_FOLDER"]
+    remaining = os.listdir(upload_dir)
+    assert len(remaining) == 0
+
+    mock_run.assert_called_once()
+    cmd = mock_run.call_args[0][0]
+    assert cmd[0] == "lp"
+
+
+@patch("app.subprocess.run")
+def test_post_pdf_exceeds_max_pages(mock_run, client, large_pdf):
+    data = {"file": (io.BytesIO(large_pdf), "big.pdf")}
+    resp = client.post("/", data=data, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"maximum allowed" in resp.data.lower()
+
+    mock_run.assert_not_called()
+
+
+def test_post_corrupt_pdf(client, app, corrupt_file):
+    data = {"file": (io.BytesIO(corrupt_file), "bad.pdf")}
+    resp = client.post("/", data=data, follow_redirects=True)
+    assert resp.status_code == 200
+    assert b"corrupt" in resp.data.lower()
+
+    upload_dir = app.config["UPLOAD_FOLDER"]
+    remaining = os.listdir(upload_dir)
+    assert len(remaining) == 0