Add post_type_support to decouple RSVP functionality from the gatherpress_event post type, enabling any post type to opt into RSVPs

[mauteri]

Description:

Adds gatherpress-rsvp as a registered post type support on gatherpress_event, decoupling RSVP functionality from the hardcoded post type. Any post type can now opt into the full RSVP system via add_post_type_support('my_cpt', 'gatherpress-rsvp').

Changes include:

• Replacing Event::POST_TYPE === get_post_type() checks with post_type_supports( get_post_type(), 'gatherpress-rsvp' ) across all RSVP-related PHP classes and blocks
• get_rsvps() now queries all post types with gatherpress-rsvp support instead of hardcoding gatherpress_event
• save_post_gatherpress_event hook replaced with save_post + support check for waiting list processing
• Adds isPostTypeSupporting( support, postType ) generic JS helper; isEventPostType() becomes a thin wrapper around it; RSVP blocks use it to check gatherpress-rsvp for editor dimming context
• Adds developer documentation

Scope: Covers gatherpress-rsvp only. Venue and online-event supports are planned for future PRs.

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Ways to test:

1. Existing events work unchanged — Create/edit a gatherpress_event post, confirm RSVP blocks render in the editor and on the frontend, RSVP form submissions work, waiting list processes correctly
2. Custom post type opt-in — Register a CPT with gatherpress-rsvp support, confirm RSVP blocks render and are not dimmed in the editor, and RSVP form submissions work on the frontend
3. Non-supported post types are blocked — Confirm RSVP blocks dim in the editor on a regular post or page, and RSVP form submissions are rejected with a 400 error
4. RSVP token emails — Confirm anonymous RSVP email verification links still work for gatherpress_event
5. Waiting list — Set a max attendance limit, fill it up, confirm waiting list triggers on save for gatherpress_event
6. PHP unit tests — npm run test:unit:php
7. JS unit tests — npm run test:unit:js

Changelog Entry

Added - New feature
Changed - Existing functionality

Credits

Props @mauteri

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[github-actions]

✅ WordPress Plugin Check Report

✅ Status: Passed

📊 Report

All checks passed! No errors or warnings found.

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[github-actions]

Test Coverage Report

✅ All coverage checks passed!

✅ PHP Coverage

=== PR Coverage Check ===

Configuration loaded:
  Minimum coverage: 100%
  Exclude patterns: 42 patterns
  Low coverage exceptions: 2 files

Checking coverage for files changed from origin/develop...

Found 11 changed PHP file(s):
  - includes/core/classes/blocks/class-rsvp-form.php
  - includes/core/classes/blocks/class-rsvp-response.php
  - includes/core/classes/blocks/class-rsvp-template.php
  - includes/core/classes/blocks/class-rsvp.php
  - includes/core/classes/class-event-setup.php
  - includes/core/classes/class-rsvp-form.php
  - includes/core/classes/class-rsvp-query.php
  - includes/core/classes/class-rsvp-setup.php
  - includes/core/classes/class-rsvp-token.php
  - includes/core/classes/class-rsvp.php
  - test/unit/php/includes/tests/core/classes/class-test-event-setup.php

Files requiring coverage check: 10
  - includes/core/classes/blocks/class-rsvp-form.php
  - includes/core/classes/blocks/class-rsvp-response.php
  - includes/core/classes/blocks/class-rsvp-template.php
  - includes/core/classes/blocks/class-rsvp.php
  - includes/core/classes/class-event-setup.php
  - includes/core/classes/class-rsvp-form.php
  - includes/core/classes/class-rsvp-query.php
  - includes/core/classes/class-rsvp-setup.php
  - includes/core/classes/class-rsvp-token.php
  - includes/core/classes/class-rsvp.php

✅ Loaded coverage.xml
✅ Loaded coverage-multisite.xml

✅ includes/core/classes/blocks/class-rsvp-form.php - 100% coverage (266/266 lines)
✅ includes/core/classes/blocks/class-rsvp-response.php - 100% coverage (123/123 lines)
✅ includes/core/classes/blocks/class-rsvp-template.php - 100% coverage (92/92 lines)
✅ includes/core/classes/blocks/class-rsvp.php - 100% coverage (131/131 lines)
⚠️  includes/core/classes/class-event-setup.php - 99.85% coverage (668/669 lines) - Exception allowed
✅ includes/core/classes/class-rsvp-form.php - 100% coverage (249/249 lines)
✅ includes/core/classes/class-rsvp-query.php - 100% coverage (75/75 lines)
✅ includes/core/classes/class-rsvp-setup.php - 100% coverage (132/132 lines)
✅ includes/core/classes/class-rsvp-token.php - 100% coverage (126/126 lines)
✅ includes/core/classes/class-rsvp.php - 100% coverage (264/264 lines)

=== Summary ===
✅ Passed: 9 file(s)
⏭️  Excluded: 1 file(s)
❌ Failed: 0 file(s)

✅ All changed files meet the minimum coverage requirement of 100%

✅ JavaScript Coverage

=== PR JavaScript Coverage Check ===

Configuration loaded:
  Minimum coverage: 100%
  Exclude patterns: 42 patterns

Checking coverage for JavaScript files changed from origin/develop...

Found 4 changed JavaScript file(s):
  - src/blocks/rsvp-count/edit.js
  - src/blocks/rsvp-response/edit.js
  - src/blocks/rsvp/edit.js
  - src/helpers/event.js

Files requiring coverage check: 1
  - src/helpers/event.js

✅ src/helpers/event.js - 100% coverage (62/62 statements)

=== Summary ===
✅ Passed: 1 file(s)
⏭️  Excluded: 3 file(s)
❌ Low coverage: 0 file(s)
❌ Missing coverage: 0 file(s)

✅ All changed JavaScript files meet the minimum coverage requirement of 100%

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[github-actions]

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