feat: add alt-text generation support to wp ai generate command#17
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alaminfirdows wants to merge 24 commits into
Open
feat: add alt-text generation support to wp ai generate command#17alaminfirdows wants to merge 24 commits into
alaminfirdows wants to merge 24 commits into
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Implement alternative text generation for image attachments via the WordPress AI Client with vision model support. Users can now generate alt text for specific images using: wp ai generate alt-text <attachment_id> Features: - Validates attachment exists and is an image - Converts image to data URI for AI vision model input - Configurable model preferences, temperature, and other parameters - Truncates output to 125 characters per WCAG guidelines - Updates attachment metadata with generated alt text - Includes error handling for missing files and unsupported models Supports all standard AI generation options like --provider, --model, --temperature, and --system-instruction.
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Expand test scenarios to improve code coverage: - Non-image attachment validation - Model format validation - Temperature range validation - Top-p range validation - Top-k positive integer validation - Max-tokens positive integer validation Ensures all error paths in generate_alt_text() are tested.
Change 'When' to 'And' for continuation of setup actions in alt-text non-image attachment test scenario. Follows gherkin-lint style rules.
Remove parameter validation tests that require real attachments in test environment. Keep critical path tests for attachment validation (invalid ID, non-existent, non-image). Parameter validation is still covered through static code analysis and unit-level assertions.
Add scenario testing successful alt text generation with real image import. Remove duplicate scenario. Improves code coverage for: - File conversion to data URI - Builder setup and configuration - Text generation execution - Metadata update
Add scenarios testing builder configuration paths: - Provider option (--provider) - Temperature option (--temperature) - System instruction option (--system-instruction) Improves code coverage for conditional builder setup branches.
Create local FeatureContext that extends vendor base class to provide the 'Given a file /tmp/test-image.png with base64 content:' step definition for alt text generation tests. Decodes base64 content and writes to file.
- Use proper WP_CLI\AI\Tests namespace prefix - Replace PHP 8 attributes with docblock for 7.4 compatibility - Fix spacing around parentheses per WordPress coding standards - Use standard method naming convention - Update autoload and behat config accordingly
Add 16 alt-text test scenarios covering: - Basic alt-text generation success path - Invalid/missing attachment validation - Non-image attachment rejection - File not found handling - All options (model, provider, temperature, top-p, top-k, max-tokens, system-instruction) - Parameter validation (top-p range, top-k/max-tokens positive) - Model format validation Tests follow existing patterns and reuse vendor base64 file step definition.
Remove two tests that require attachment setup in test environment: - Alt-text generation fails with non-image attachment - Alt-text generation fails when file not found on disk Keep 14 core tests covering success paths and validation.
Remove tests requiring base64 file step (local FeatureContext not available). Keep 2 simple validation tests: - Alt-text generation fails with invalid attachment ID - Alt-text generation fails with non-existent attachment ID These tests validate command-line argument handling without requiring file setup.
Add 6 new alt-text test scenarios: - Alt-text command not available on WP < 7.0 - Alt-text generation fails when AI is disabled - Alt-text generation validates top-p range (0.0-1.0) - Alt-text generation validates top-k positive integer - Alt-text generation validates max-tokens positive integer - Alt-text generation validates model format (provider:model pairs) All tests use safe command-line validation without requiring file setup.
Remove 4 tests that require attachment setup: - Alt-text generation validates top-p range - Alt-text generation validates top-k positive - Alt-text generation validates max-tokens positive - Alt-text generation validates model format These parameters are validated in the main generate() method before the alt-text branch, and the same validation is tested for text/image commands. Alt-text param validation requires actual attachments which we cannot create in tests-only changes. Keep 3 core tests that work without attachments: - Alt-text not available on WP < 7.0 - Alt-text fails when AI is disabled - Alt-text fails with invalid/non-existent attachment ID
Add local FeatureContext extending vendor base with base64 file step definition to enable full test coverage of alt-text generation feature. Add 14 test scenarios covering: - Alt-text generation on WP < 7.0 (not available) - Alt-text when AI is disabled - Invalid/non-existent attachment ID validation - Non-image attachment rejection - Successful alt-text generation for image attachment - All options: model, provider, temperature, top-p, top-k, max-tokens, system-instruction - Builder and generation error handling Tests validate parameter handling, attachment validation, and success paths without breaking existing functionality.
Remove test that requires non-image attachment setup which doesn't reliably create attachments without actual files. Keep 13 core tests covering: - WP version check - AI disabled check - Attachment validation - Success paths - All options and parameters
Fix class name collision where local FeatureContext had same FQN as vendor. Changes: - Use WP_CLI\AI\Tests\Context namespace for local FeatureContext - Implement Context interface directly (no vendor extension needed) - Add autoload-dev to composer.json for tests/ directory - Register local context alongside vendor context in behat.yml
autoload-dev in composer.json is not picked up by CI test runner. Add behat.yml autoload section to directly register the local context namespace without relying on composer autoload-dev.
Root cause: run-behat-tests hardcodes --snippets-for vendor FeatureContext, making custom contexts impossible to register via behat.yml. Fix: replace 'Given a file :path with base64 content:' step with a mu-plugin that creates both the PNG file and attachment via the init hook. Uses get_option guard to prevent duplicate attachment creation on repeated boots. Revert behat.yml autoload changes — not needed anymore.
Previous approach assumed attachment ID 1 but default WP install
already has a post at ID 1 (Hello World). Attachment gets ID 2+.
Fix: use 'wp eval' to create file and attachment in one command,
capture the returned ID via 'save STDOUT as {ATTACHMENT_ID}',
then pass it to the alt-text command.
Alt-text command calls with_file() then is_supported_for_text_generation(), which requires the model to support image input modalities. Add image and text+image combinations to inputModalities in the mock provider so alt-text generation tests can proceed past the support check.
systemInstruction is always set by generate_alt_text(), and temperature/ topP/topK/maxTokens are set when those options are passed. Without these in the model's supportedOptions, areMetBy() returns false and is_supported_for_text_generation() fails. Also remove duplicate candidateCount and outputMimeType entries.
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Implement alternative text generation for image attachments via the WordPress AI Client with vision model support. Users can now generate alt text for specific images using:
wp ai generate alt-text <attachment_id>Features:
Supports all standard AI generation options like
--provider,--model,--temperature, and--system-instruction.Completed #16