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feat: deterministic image composer - OG + square variants, branding, baked caption (v0.17.0) (#152)

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Composer slots between provider bytes and sideload: corner-marked featured,
branded 1200x630 OG + 1080x1080 square with baked clamped caption, capability
ladder (Imagick -> resize-only -> pass-through, never blocks publish).
Alt-text bug fix (caption, not model name). Vendored brand PNGs + OFL Poppins.

QA: APPROVE-WITH-P2-NOTES @ 6f76df1 (qa-reviews/prautoblogger/2026-06-11-6f76df1.md)
CEO greenlight: 2026-06-11 in chat.

Agent-Session: cto-image-composer-merge-20260611
This commit is contained in:
peptiderepo
2026-06-11 15:27:48 +07:00
committed by GitHub
parent d559fc58ab
commit 6de8cf2031
26 changed files with 2424 additions and 128 deletions
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66
tests/unit/Core/ImagePipelineTest.php
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@@ -18,6 +18,11 @@ class ImagePipelineTest extends BaseTestCase {
protected function setUp(): void {
parent::setUp();
// v0.17.0: the composer caches its capability probe via update_option
// and keeps a once-per-run warning flag that must not leak between tests.
\PRAutoBlogger_Image_Composer::reset_run_state();
Functions\when( 'update_option' )->justReturn( true );
// Mock WordPress functions used by the pipeline and its dependencies.
Functions\when( 'is_wp_error' )->alias( function ( $thing ) {
return $thing instanceof \WP_Error;
@@ -346,6 +351,67 @@ class ImagePipelineTest extends BaseTestCase {
$this->assertNotEmpty( $result['errors'] );
}
/**
* v0.17.0: composed OG/square variants are sideloaded and meta-linked —
* role + base-attachment meta on the variant attachments, role-specific
* image ID meta on the post, and the featured attachment tagged with its
* role. Composition adds no cost-tracker rows beyond the primary image.
*/
public function test_composed_variants_are_sideloaded_and_meta_linked(): void {
$image_result = [
'bytes' => 'fake_image_data',
'mime_type' => 'image/png',
'width' => 1200,
'height' => 632,
'model' => 'test-model',
'cost_usd' => 0.05,
'latency_ms' => 2000,
];
$provider = $this->createMock( \PRAutoBlogger_Image_Provider_Interface::class );
$provider->method( 'estimate_cost' )->willReturn( 0.05 );
$provider->method( 'generate_image_batch' )->willReturn( [ 'image_a' => $image_result ] );
$cost_tracker = $this->createMock( \PRAutoBlogger_Cost_Tracker::class );
$cost_tracker->method( 'would_exceed_budget' )->willReturn( false );
// Exactly one cost row: the primary image. Variants are $0 local renders.
$cost_tracker->expects( $this->exactly( 1 ) )->method( 'log_image_generation' );
$composer = new class() implements \PRAutoBlogger_Image_Composer_Interface {
public function compose( array $image_data, array $context ): array {
return [
[ 'bytes' => 'marked', 'mime_type' => 'image/png', 'width' => 1200, 'height' => 632, 'role' => 'featured' ],
[ 'bytes' => 'og_png', 'mime_type' => 'image/png', 'width' => 1200, 'height' => 630, 'role' => 'og' ],
[ 'bytes' => 'sq_png', 'mime_type' => 'image/png', 'width' => 1080, 'height' => 1080, 'role' => 'square' ],
];
}
};
Functions\when( 'get_temp_dir' )->justReturn( '/tmp/' );
$next_id = 41;
Functions\when( 'media_handle_sideload' )->alias( function () use ( &$next_id ) {
return ++$next_id; // 42 featured, 43 og, 44 square.
} );
$meta_calls = [];
Functions\when( 'update_post_meta' )->alias( function ( $object_id, $key, $value ) use ( &$meta_calls ) {
$meta_calls[] = [ $object_id, $key, $value ];
return true;
} );
$pipeline = new \PRAutoBlogger_Image_Pipeline( $provider, $cost_tracker, null, $composer );
$result = $pipeline->generate_and_attach_images( 1, [ 'post_title' => 'Test' ], null );
$this->assertSame( 42, $result['image_a_id'] );
$this->assertContains( [ 42, '_prautoblogger_image_role', 'featured' ], $meta_calls );
$this->assertContains( [ 43, '_prautoblogger_image_role', 'og' ], $meta_calls );
$this->assertContains( [ 43, '_prautoblogger_base_attachment_id', 42 ], $meta_calls );
$this->assertContains( [ 1, '_prautoblogger_og_image_id', 43 ], $meta_calls );
$this->assertContains( [ 44, '_prautoblogger_image_role', 'square' ], $meta_calls );
$this->assertContains( [ 44, '_prautoblogger_base_attachment_id', 42 ], $meta_calls );
$this->assertContains( [ 1, '_prautoblogger_square_image_id', 44 ], $meta_calls );
}
/**
* Test graceful handling when one image in the batch returns an error.
*/