[go_router] New feature improve debug full path

[hashirshoaeb]

This PR fixes flutter/flutter#148121

• Replaced => with | , ├─ and └─ to improve readability
• It prints the Widget name for easy referencing
• Shell routes does not have their own paths for it is presented as (Shell route) in the tree
• Prints the widget name of the routes it is building.

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[chunhtai]

This is so so much better than the previous, Thanks a lot!!

[chunhtai]

Wouldn't this always be Widget?

maybe just use GoRoute and GoRoute(redirectOnly)

[hashirshoaeb]

screenName is the name of the widget. it will not always print Widget. Otherwise it was for no use.
Just like in the logging_test.dart test it logs / (Text)

Example from my app:

[GoRouter] Full paths for routes:
           ├─/ (SplashScreen)
           ├─/intro (IntroScreen)
           ├─ (ShellRoute)
           │ ├─/main/year ()
           │ │ └─/main/year/month (HomeScreen)
           │ └─/main/profile (ProfileScreen)
           │   ├─/main/profile/analytics (AnalyticsScreen)
           │   └─/main/profile/settings (SettingsScreen)
           │     └─/main/profile/settings/license (LicenseAgreementScreen)
           └─/journal (JournalsListScreen)
             ├─/journal/new (JournalCreateScreen)
             └─/journal/:id (JournalDetailScreen)
               └─/journal/:id/edit (JournalEditScreen)

There are edge cases:

• screenName is only get printed, when user uses GoRouter.builder
• It does not print for GoRouter.pageBuilder
• It prints (Never) when GoRouter.builder throws Unimplemented Error

[hashirshoaeb]

instead of using magic strings

    final String newDecoration =
        parentDecoration.replaceAll('├─', '│ ').replaceAll('└─', '  ');

we can treat String as list of enum

    final newDecoration = parentDecoration.map((e) {
      switch (e) {
        case DecorType.branch:
          return DecorType.parentBranch;
        case DecorType.leaf:
          return DecorType.none;
        default:
          return e;
      }
    });

where DecorType is

enum DecorType {
  parentBranch('| '),
  branch('├─'),
  leaf('└─'),
  none('  '),
  ;

  final String value;
  const DecorType(this.value);

  @override
  String toString() => value;
}

@chunhtai What are your thoughts, is it worth changing?

[chunhtai]

yup that sounds better

[chunhtai]

LGTM

[hashirshoaeb]

Just checking. If anything is pending on my side, just let me know. @chunhtai @hangyujin. Looking forward to the merge. 🙈

[hangyujin]

LGTM, this looks very helpful!

[hangyujin]

LGTM