feat(graphql_common): add common package that contains utils functions

Signed-off-by: Vincenzo Palazzo <[email protected]>

Author: vincenzopalazzo

packages/graphql_common/.gitignore

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+# Files and directories created by pub.
+.dart_tool/
+.packages
+
+# Conventional directory for build outputs.
+build/
+
+# Omit committing pubspec.lock for library packages; see
+# https://dart.dev/guides/libraries/private-files#pubspeclock.
+pubspec.lock

packages/graphql_common/CHANGELOG.md

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+## 1.0.0
+
+- Initial version.

packages/graphql_common/README.md

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+<!-- 
+This README describes the package. If you publish this package to pub.dev,
+this README's contents appear on the landing page for your package.
+
+For information about how to write a good package README, see the guide for
+[writing package pages](https://dart.dev/guides/libraries/writing-package-pages). 
+
+For general information about developing packages, see the Dart guide for
+[creating packages](https://dart.dev/guides/libraries/create-library-packages)
+and the Flutter guide for
+[developing packages and plugins](https://flutter.dev/developing-packages). 
+-->
+
+TODO: Put a short description of the package here that helps potential users
+know whether this package might be useful for them.
+
+## Features
+
+TODO: List what your package can do. Maybe include images, gifs, or videos.
+
+## Getting started
+
+TODO: List prerequisites and provide or point to information on how to
+start using the package.
+
+## Usage
+
+TODO: Include short and useful examples for package users. Add longer examples
+to `/example` folder. 
+
+```dart
+const like = 'sample';
+```
+
+## Additional information
+
+TODO: Tell users more about the package: where to find more information, how to 
+contribute to the package, how to file issues, what response they can expect 
+from the package authors, and more.

packages/graphql_common/analysis_options.yaml

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+# This file configures the static analysis results for your project (errors,
+# warnings, and lints).
+#
+# This enables the 'recommended' set of lints from `package:lints`.
+# This set helps identify many issues that may lead to problems when running
+# or consuming Dart code, and enforces writing Dart using a single, idiomatic
+# style and format.
+#
+# If you want a smaller set of lints you can change this to specify
+# 'package:lints/core.yaml'. These are just the most critical lints
+# (the recommended set includes the core lints).
+# The core lints are also what is used by pub.dev for scoring packages.
+
+include: package:lints/recommended.yaml
+
+# Uncomment the following section to specify additional rules.
+
+# linter:
+#   rules:
+#     - camel_case_types
+
+# analyzer:
+#   exclude:
+#     - path/to/excluded/files/**
+
+# For more information about the core and recommended set of lints, see
+# https://dart.dev/go/core-lints
+
+# For additional information about configuring this file, see
+# https://dart.dev/guides/language/analysis-options

packages/graphql_common/example/graphql_common_example.dart

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+void main() {}

packages/graphql_common/lib/graphql_common.dart

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+/// Support for doing something awesome.
+///
+/// More dartdocs go here.
+library graphql_common;
+
+export 'src/tracing/tracer.dart';
+export 'src/tracing/logger_tracer.dart';

packages/graphql_common/lib/src/tracing/logger_tracer.dart

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+import 'package:graphql_common/src/tracing/tracer.dart';
+import 'package:logger/logger.dart';
+
+class LoggerTracer extends Tracer {
+  late Logger _logger;
+
+  LoggerTracer(
+      {LogFilter? filter,
+      LogPrinter? printer,
+      LogOutput? output,
+      Level? level}) {
+    _logger =
+        Logger(filter: filter, printer: printer, output: output, level: level);
+  }
+
+  @override
+  Future<void> asyncTrace(String msg, {Map<String, dynamic>? opts}) {
+    return Future(() => _logger.d(msg));
+  }
+}

packages/graphql_common/lib/src/tracing/tracer.dart

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+/// Tracer is an abstract class that provide the basic blocs to
+/// build an application tracer (aka Logger).
+///
+/// author: Vincenzo Palazzo <[email protected]>
+abstract class Tracer {
+  /// Async function to start to tracing the library at runtime
+  /// useful when the user want log the information in an external
+  /// source, and it is required an async trace!
+  Future<void> asyncTrace(String msg, {Map<String, dynamic>? opts});
+}

packages/graphql_common/pubspec.yaml

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+name: graphql_common
+description: A starting point for Dart libraries or applications.
+version: 0.0.1
+# homepage: https://www.example.com
+
+environment:
+  sdk: '>=2.12.6 <3.0.0'
+
+dependencies:
+  logger: ^1.1.0
+
+
+dev_dependencies:
+  lints: ^2.0.0
+  test: ^1.16.0
+  graphql:
+    path: ../graphql

packages/graphql_common/test/graphql_common_test.dart

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+import 'package:test/test.dart';
+
+void main() {
+  group('A group of tests', () {
+    setUp(() {
+      // Additional setup goes here.
+    });
+
+    test('First Test', () {});
+  });
+}