Refactor EditPostActivity by extracting helper classes

[nbradbury]

Summary

Refactors EditPostActivity by extracting cohesive responsibilities into smaller, testable helper classes.

Phase 1 (Initial commit):

• MediaUploadCoordinator - Coordinates media upload events between FluxC and the editor
• PostLoadingStateManager - Manages post loading states and progress dialogs
• EditorIntentProcessor - Processes editor intents and determines post setup actions

Phase 2:

• EditorMediaPickerHandler - Handles media picker launching for the post editor
• EditorActivityResultHandler - Handles activity result processing
• ShareContentHandler - Handles setting post content from share intents

Phase 3:

• EditorModeHandler - Manages editor mode switching (HTML/Visual/Gutenberg)
• EditorNavigationManager - Manages ViewPager navigation and UI updates for destinations

Phase 4:

• PostPublishingCoordinator - Handles post publishing workflow, email verification, and upload validation

Each handler follows the existing @Reusable Dagger pattern with callback interfaces for Activity-level operations. This approach:

• Improves testability through dependency injection
• Reduces EditPostActivity complexity
• Creates clear separation of concerns
• Enables independent unit testing of each component

Test plan

Build verification:

• ./gradlew assembleWordPressVanillaDebug passes
• ./gradlew detekt passes
• ./gradlew checkstyle passes
• ./gradlew :WordPress:testWordPressVanillaDebugUnitTest passes

Manual testing:

Media upload flow:

1. Create a new post
2. Add images/videos from device, WP media library, stock photos, and GIFs

• Verify upload progress shows correctly
• Verify uploads complete successfully
• Verify retry works on failed uploads

Activity result handling:

1. Add media from various sources (camera, gallery, stock media, GIFs)

• Verify media is added to post correctly
• Verify cancellation is handled properly

Share content:

1. Share text/images to WordPress from another app

• Verify shared content appears in new post

Editor mode switching:

1. Open a post in the editor
2. Toggle HTML mode via the menu

• Verify mode switches and notice appears
• Verify toggling back to visual mode works

Navigation:

1. Open post settings

• Verify title changes appropriately
• Verify navigation between Editor/Settings/PublishSettings/History works

Publishing flow:

1. Create a new post with content
2. Tap the publish button

• Verify prepublishing bottom sheet appears
• Verify publishing workflow completes successfully

🤖 Generated with Claude Code

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

Generated by 🚫 Danger

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack by scanning the QR code below to install the corresponding build.

	App Name	Jetpack
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr22492-f866f81
	Commit	f866f81
	Direct Download	jetpack-prototype-build-pr22492-f866f81.apk

Note: Google Login is not supported on these builds.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress by scanning the QR code below to install the corresponding build.

	App Name	WordPress
	Flavor	Jalapeno
	Build Type	Debug
	Version	pr22492-f866f81
	Commit	f866f81
	Direct Download	wordpress-prototype-build-pr22492-f866f81.apk

Note: Google Login is not supported on these builds.

[codecov]

Codecov Report

❌ Patch coverage is 51.92630% with 287 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.12%. Comparing base (19696a3) to head (f866f81).
⚠️ Report is 20 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...droid/ui/posts/editor/PostPublishingCoordinator.kt	21.95%	61 Missing and 3 partials ⚠️
...oid/ui/posts/editor/EditorActivityResultHandler.kt	39.36%	37 Missing and 20 partials ⚠️
...ndroid/ui/posts/editor/EditorMediaPickerHandler.kt	47.36%	17 Missing and 33 partials ⚠️
...s/android/ui/posts/editor/EditorIntentProcessor.kt	68.60%	19 Missing and 8 partials ⚠️
...id/ui/posts/editor/media/MediaUploadCoordinator.kt	52.94%	14 Missing and 10 partials ⚠️
...ess/android/ui/posts/editor/ShareContentHandler.kt	45.00%	12 Missing and 10 partials ⚠️
...press/android/ui/posts/editor/EditorModeHandler.kt	48.71%	17 Missing and 3 partials ⚠️
...android/ui/posts/editor/PostLoadingStateManager.kt	79.68%	9 Missing and 4 partials ⚠️
...android/ui/posts/editor/EditorNavigationManager.kt	78.26%	1 Missing and 9 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk   #22492      +/-   ##
==========================================
+ Coverage   38.93%   39.12%   +0.19%     
==========================================
  Files        2190     2199       +9     
  Lines      105425   106022     +597     
  Branches    14952    15164     +212     
==========================================
+ Hits        41052    41486     +434     
- Misses      60940    60997      +57     
- Partials     3433     3539     +106     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[sonarqubecloud]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.5% Duplication on New Code

See analysis details on SonarQube Cloud

[nbradbury]

Closing this as it was just an experiment.