80 lines
2.2 KiB
Dart
80 lines
2.2 KiB
Dart
import 'dart:convert';
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import 'package:logger/logger.dart';
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class SimpleLogPrinter extends LogPrinter {
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final String className;
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static final _deviceStackTraceRegex = RegExp(r'#[0-9]+[\s]+(.+) \(([^\s]+)\)');
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static final _webStackTraceRegex = RegExp(r'^((packages|dart-sdk)\/[^\s]+\/)');
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SimpleLogPrinter(this.className);
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@override
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List<String> log(LogEvent event) {
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var level = event.level;
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var message = stringifyMessage(event.message);
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var error = event.error?.toString() ?? '';
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var color = PrettyPrinter.levelColors[level];
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var emoji = PrettyPrinter.levelEmojis[level];
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String stack;
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if (event.stackTrace == null) {
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stack = formatStackTrace(StackTrace.current, 2);
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} else {
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stack = formatStackTrace(event.stackTrace, 1);
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}
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print(color(' $emoji $message $error -> $stack '));
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return [];
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}
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String stringifyMessage(dynamic message) {
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if (message is Map || message is Iterable) {
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var encoder = JsonEncoder.withIndent(' ');
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return encoder.convert(message);
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} else {
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return message.toString();
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}
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}
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String formatStackTrace(StackTrace stackTrace, int methodPosition) {
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var lines = stackTrace.toString()?.split('\n');
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var formatted = <String>[];
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var count = 0;
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for (var line in lines) {
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if (_discardDeviceStacktraceLine(line) ||
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_discardWebStacktraceLine(line)) {
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continue;
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}
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formatted.add('${line.replaceFirst(RegExp(r'#\d+\s+'), '')}');
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if (++count == methodPosition) {
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break;
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}
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}
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if (formatted.isEmpty) {
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return null;
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} else {
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//return formatted.join('\n');
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return formatted.last;
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}
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}
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bool _discardDeviceStacktraceLine(String line) {
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var match = _deviceStackTraceRegex.matchAsPrefix(line);
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if (match == null) {
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return false;
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}
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return match.group(2).startsWith('package:logger');
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}
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bool _discardWebStacktraceLine(String line) {
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var match = _webStackTraceRegex.matchAsPrefix(line);
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if (match == null) {
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return false;
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}
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return match.group(1).startsWith('packages/logger') ||
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match.group(1).startsWith('dart-sdk/lib');
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}
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}
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Logger getLogger(String className) {
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return Logger(printer: SimpleLogPrinter(className));
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}
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