129 lines
4.0 KiB
Dart
129 lines
4.0 KiB
Dart
/* MIT License
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*
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* Copyright (C) 2019, 2020, 2021 Famedly GmbH
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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import 'dart:core';
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import 'package:matrix/matrix_api_lite/utils/logs.dart';
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abstract class TryGet {
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void call(String key, Type expected, Type actual);
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static const TryGet required = _RequiredLog();
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static const TryGet optional = _OptionalLog();
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/// This is helpful if you have a field that can mean multiple things on purpose.
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static const TryGet silent = _SilentLog();
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}
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class _RequiredLog implements TryGet {
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const _RequiredLog();
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@override
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void call(String key, Type expected, Type actual) => Logs().w(
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'Expected required "$expected" in event content for the Key "$key" but got "$actual" at ${StackTrace.current.firstLine}',
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);
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}
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class _OptionalLog implements TryGet {
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const _OptionalLog();
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@override
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void call(String key, Type expected, Type actual) {
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if (actual != Null) {
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Logs().w(
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'Expected optional "$expected" in event content for the Key "$key" but got "$actual" at ${StackTrace.current.firstLine}',
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);
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}
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}
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}
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class _SilentLog implements TryGet {
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const _SilentLog();
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@override
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void call(String key, Type expected, Type actual) {}
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}
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extension TryGetMapExtension on Map<String, Object?> {
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T? tryGet<T extends Object>(String key, [TryGet log = TryGet.optional]) {
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final Object? value = this[key];
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if (value is! T) {
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log(key, T, value.runtimeType);
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return null;
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}
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return value;
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}
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List<T>? tryGetList<T>(String key, [TryGet log = TryGet.optional]) {
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final Object? value = this[key];
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if (value is! List) {
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log(key, T, value.runtimeType);
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return null;
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}
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try {
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// copy entries to ensure type check failures here and not an access
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return value.cast<T>().toList();
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} catch (_) {
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Logs().v(
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'Unable to create "List<$T>" in event content for the key "$key" at ${StackTrace.current.firstLine}',
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);
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return null;
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}
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}
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Map<A, B>? tryGetMap<A, B>(String key, [TryGet log = TryGet.optional]) {
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final Object? value = this[key];
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if (value is! Map) {
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log(key, <A, B>{}.runtimeType, value.runtimeType);
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return null;
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}
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try {
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// copy map to ensure type check failures here and not an access
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return Map.from(value.cast<A, B>());
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} catch (_) {
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Logs().v(
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'Unable to create "Map<$A,$B>" in event content for the key "$key" at ${StackTrace.current.firstLine}',
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);
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return null;
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}
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}
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A? tryGetFromJson<A>(
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String key,
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A Function(Map<String, Object?>) fromJson, [
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TryGet log = TryGet.optional,
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]) {
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final value = tryGetMap<String, Object?>(key, log);
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return value != null ? fromJson(value) : null;
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}
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}
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extension on StackTrace {
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String get firstLine {
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final lines = toString().split('\n');
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return lines.length >= 3
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? lines[2].replaceFirst('#2 ', '')
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: lines.isNotEmpty
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? lines.first
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: '(unknown position)';
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}
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}
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