Feat 314 translate generate pdf to dart

dart/generate_pdf/.gitignore

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+# See https://www.dartlang.org/guides/libraries/private-files
+
+# Files and directories created by pub
+.dart_tool/
+.packages
+build/
+# If you're building an application, you may want to check-in your pubspec.lock
+pubspec.lock
+
+# Directory created by dartdoc
+# If you don't generate documentation locally you can remove this line.
+doc/api/
+
+# dotenv environment variables file
+.env*
+
+# Avoid committing generated Javascript files:
+*.dart.js
+*.info.json      # Produced by the --dump-info flag.
+*.js             # When generated by dart2js. Don't specify *.js if your
+                 # project includes source files written in JavaScript.
+*.js_
+*.js.deps
+*.js.map
+
+.flutter-plugins
+.flutter-plugins-dependencies
+
+# Directory used by Appwrite CLI for local development
+.appwrite

dart/generate_pdf/README.md

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+# 📄 Dart Generate PDF Function
+
+Generates a sample invoice in PDF.
+
+## 🧰 Usage
+
+### GET /
+
+Returns a PDF invoice.
+
+No parameters required.
+
+**Response**
+
+Sample `200` Response:
+
+Returns a binary stream of the generated PDF document. The `Content-Type` of the response will be set as `application/pdf`.
+
+## ⚙️ Configuration
+
+| Setting           | Value           |
+| ----------------- | --------------- |
+| Runtime           | Dart (3.5.0)     |
+| Entrypoint        | `lib/main.dart` |
+| Build Commands    | `dart pub get`  |
+| Permissions       | `any`           |
+| Timeout (Seconds) | 15              |
+
+## 🔒 Environment Variables
+
+No environment variables required.

dart/generate_pdf/analysis_options.yaml

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+include: package:lints/recommended.yaml

dart/generate_pdf/lib/faker.dart

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+import 'package:faker_dart/faker_dart.dart';
+
+Map<String, dynamic> generateFakeOrder() {
+  final faker = Faker.instance;
+  List<Map<String, dynamic>> items = List.generate(
+      faker.datatype.number(min: 1, max: 5),
+      (_) => {
+            'description': faker.commerce.productName(),
+            'quantity': faker.datatype.number(min: 1, max: 10),
+            'cost': double.parse(faker.commerce.price(symbol: ''))
+                .toStringAsFixed(2)
+          });
+
+  return {
+    'id': faker.datatype.uuid(),
+    'date': faker.date.past(DateTime.now(), rangeInYears: 25).toIso8601String(),
+    'name': faker.name.fullName(),
+    'items': items,
+    'total': items.fold<num>(0, (sum, item) {
+      return sum + double.parse(item['cost']);
+    })
+  };
+}

dart/generate_pdf/lib/main.dart

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+import 'dart:convert';
+import './pdf.dart';
+import './faker.dart';
+
+Future<List<int>> pdfHandler() async {
+  final fakeOrder = generateFakeOrder();
+  print(
+      'Generated fake order: ${JsonEncoder.withIndent('  ').convert(fakeOrder)}');
+
+  final pdfBuffer = await createPDF(fakeOrder);
+  print('PDF created');
+
+  return pdfBuffer;
+}
+
+Future main(final context) async {
+  try {
+    final pdfBuffer = await pdfHandler();
+    return context.res
+        .binary(pdfBuffer, 200, {'Content-Type': 'application/pdf'});
+  } catch (e) {
+    context.error('Error occurred while generating PDF: $e');
+    return context.res.text('Error occurred while generating PDF: $e', 500);
+  }
+}

dart/generate_pdf/lib/pdf.dart

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+import 'dart:typed_data';
+import 'package:pdf/pdf.dart';
+import 'package:pdf/widgets.dart' as pw;
+
+Future<Uint8List> createPDF(order) async {
+  final pdf = pw.Document();
+  final date = DateTime.parse(order['date']);
+
+  final String orderList = (order['items'] as List)
+      .map((item) =>
+          '${item['description']} x ${item['quantity']} = \$${item['cost']}')
+      .join('\n');
+
+  pdf.addPage(pw.Page(
+      pageFormat: PdfPageFormat.a4,
+      margin: pw.EdgeInsets.only(left: 50),
+      build: (pw.Context context) {
+        return pw.Stack(children: [
+          // Invoice title
+          pw.Positioned(
+              bottom: 750,
+              child:
+                  pw.Text('Sample Invoice', style: pw.TextStyle(fontSize: 20))),
+
+          // Order date
+          pw.Positioned(
+              left: 350,
+              bottom: 750,
+              child: pw.Text('${date.month}/${date.day}/${date.year}',
+                  style: pw.TextStyle(fontSize: 15))),
+
+          // Name
+          pw.Positioned(
+              bottom: 700,
+              child: pw.Text('Hello, ${order['name']}!',
+                  style: pw.TextStyle(fontSize: 30))),
+
+          // Order ID
+          pw.Positioned(
+              bottom: 650,
+              child: pw.Text('Order ID: ${order['id']}',
+                  style: pw.TextStyle(fontSize: 10))),
+
+          // Order total
+          pw.Positioned(
+              bottom: 600,
+              child: pw.Text('Total: \$${order['total'].toStringAsFixed(2)}',
+                  style: pw.TextStyle(fontSize: 15))),
+
+          // Order item list
+          pw.Positioned(
+              top: 841.89 - 565,
+              child: pw.Text(orderList,
+                  style: pw.TextStyle(fontSize: 15, lineSpacing: 8))),
+        ]);
+      }));
+
+  final Uint8List pdfBytes = await pdf.save();
+
+  return Uint8List.fromList(pdfBytes);
+}

dart/generate_pdf/pubspec.yaml

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+name: generate_pdf
+version: 1.0.0
+
+environment:
+  sdk: ^3.5.0
+
+dependencies:
+  dart_appwrite: ^13.0.0
+  faker_dart: ^0.2.2
+  pdf: ^3.11.3
+  shelf: ^1.4.2
+
+dev_dependencies:
+  lints: ^5.0.0
+  test: ^1.24.0