fix: block sending empty messages, also empty markdowns [WPB-10179]

[saleniuk]

WPB-10179 [Android] We can send empty messages, spaces or breaking lines

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Issues

We can send empty messages, spaces or breaking lines in the conversations.

Causes (Optional)

isNotEmpty() used instead of isNotBlank(), but that still does not block the user from sending messages with empty markdowns, like # .

Solutions

Check if the message that the user writes is not blank and is not "markdown blank" which means it doesn't contain any markdown with actual text. It uses our markdown helper so it should behave exactly the same as showing the message, messages that would appear empty will be blocked from being sent.

Testing

Test Coverage (Optional)

• I have added automated test to this contribution

How to Test

Enter message with only whitespaces or with markdowns containing only whitespaces and try to send that message - .

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

Built wire-android-staging-release-pr-3231.apk is available for download

[github-actions]

Built wire-android-internal-compat-pr-3231.apk is available for download