line / line/flutter_line_sdk

Inconsistent default bot prompt behavior between Android and iOS

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Dominant language
Dart
Stars
225
Forks
60
PR merge metrics
No merged PRs in 30d

Description

When calling LineSDK.instance.login() without a LoginOption, the plugin handles botPrompt differently across platforms:

- Android: Defaults to "normal".
- iOS: Leaves botPromptStyle as nil, omitting bot_prompt from the authorization request.

This can cause different add-friend prompt behavior for the same Flutter login call.

Expected behavior

Default to "normal" on both platforms when no value is provided, while preserving explicitly supplied "normal" and "aggressive" values.

Proposed fix

Apply the "normal" fallback when reading botPrompt in the iOS plugin.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start at the iOS plugin path used by LineSDK.instance.login() when no LoginOption is supplied, and trace how botPrompt is read before the authorization request. Verify that the fallback is "normal" while explicitly supplied "normal" and "aggressive" values remain unchanged; done means matching Android behavior for default and explicit values.

Written by the indexing model from the issue text.

Assessment

Tech stack
dart, flutter, ios
Domain
authentication, mobile
Issue type
Bug
Difficulty
2/5
Estimated time
1-3 hours
Activity status
Active
Clarity
Clearly specified
Newbie friendliness
78/100

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