platform/angel_serialize_generator/lib/context.dart
2018-12-30 20:18:44 -05:00

73 lines
2.5 KiB
Dart

import 'package:analyzer/dart/constant/value.dart';
import 'package:analyzer/dart/element/element.dart';
import 'package:angel_serialize/angel_serialize.dart';
import 'package:code_builder/code_builder.dart';
import 'package:recase/recase.dart';
import 'package:source_gen/source_gen.dart';
/// A base context for building serializable classes.
class BuildContext {
ReCase _modelClassNameRecase;
TypeReference _modelClassType;
/// A map of fields that are absolutely required, and error messages for when they are absent.
final Map<String, String> requiredFields = {};
/// A map of field names to resolved names from `@Alias()` declarations.
final Map<String, String> aliases = {};
/// A map of field names to their default values.
final Map<String, DartObject> defaults = {};
/// A map of fields that have been marked as to be excluded from serialization.
final Map<String, Exclude> excluded = {};
/// A map of "synthetic" fields, i.e. `id` and `created_at` injected automatically.
final Map<String, bool> shimmed = {};
final bool autoIdAndDateFields, autoSnakeCaseNames;
final String originalClassName, sourceFilename;
/// The fields declared on the original class.
final List<FieldElement> fields = [];
final List<ParameterElement> constructorParameters = [];
final ConstantReader annotation;
final ClassElement clazz;
/// The name of the field that identifies data of this model type.
String primaryKeyName = 'id';
BuildContext(this.annotation, this.clazz,
{this.originalClassName,
this.sourceFilename,
this.autoSnakeCaseNames,
this.autoIdAndDateFields});
/// The name of the generated class.
String get modelClassName => originalClassName.startsWith('_')
? originalClassName.substring(1)
: originalClassName;
/// A [ReCase] instance reflecting on the [modelClassName].
ReCase get modelClassNameRecase =>
_modelClassNameRecase ??= new ReCase(modelClassName);
TypeReference get modelClassType =>
_modelClassType ??= new TypeReference((b) => b.symbol = modelClassName);
/// The [FieldElement] pointing to the primary key.
FieldElement get primaryKeyField =>
fields.firstWhere((f) => f.name == primaryKeyName);
bool get importsPackageMeta {
return clazz.library.imports.any((i) => i.uri == 'package:meta/meta.dart');
}
/// Get the aliased name (if one is defined) for a field.
String resolveFieldName(String name) =>
aliases.containsKey(name) ? aliases[name] : name;
}