chore: move support check to __call()

Author: justlevine

src/wp-includes/ai-client/class-wp-ai-client-prompt-builder.php

@@ -178,11 +178,6 @@ class WP_AI_Client_Prompt_Builder {
 	 */
 	public function __construct( ProviderRegistry $registry, $prompt = null ) {
 		try {
-			if ( ! wp_supports_ai() ) {
-				// The catch block will convert this to a WP_Error.
-				throw new \RuntimeException( __( 'AI features are not supported in this environment.' ) );
-			}
-
 			$this->builder = new PromptBuilder( $registry, $prompt );
 		} catch ( Exception $e ) {
 			$this->builder = new PromptBuilder( $registry );
@@ -297,26 +292,35 @@ public function __call( string $name, array $arguments ) {
 
 		// Check if the prompt should be prevented for is_supported* and generate_*/convert_text_to_speech* methods.
 		if ( self::is_support_check_method( $name ) || self::is_generating_method( $name ) ) {
-			/**
-			 * Filters whether to prevent the prompt from being executed.
-			 *
-			 * @since 7.0.0
-			 *
-			 * @param bool                        $prevent Whether to prevent the prompt. Default false.
-			 * @param WP_AI_Client_Prompt_Builder $builder A clone of the prompt builder instance (read-only).
-			 */
-			$prevent = (bool) apply_filters( 'wp_ai_client_prevent_prompt', false, clone $this );
+			// If AI is not supported, then there's no need to apply the filter as the prompt will be prevented anyway.
+			$is_ai_disabled = ! wp_supports_ai();
+			$prevent        = $is_ai_disabled;
+			if ( ! $prevent ) {
+				/**
+				 * Filters whether to prevent the prompt from being executed.
+				 *
+				 * @since 7.0.0
+				 *
+				 * @param bool                        $prevent Whether to prevent the prompt. Default false.
+				 * @param WP_AI_Client_Prompt_Builder $builder A clone of the prompt builder instance (read-only).
+				 */
+				$prevent = (bool) apply_filters( 'wp_ai_client_prevent_prompt', false, clone $this );
+			}
 
 			if ( $prevent ) {
 				// For is_supported* methods, return false.
 				if ( self::is_support_check_method( $name ) ) {
 					return false;
 				}
 
+				$error_message = $is_ai_disabled
+					? __( 'AI features are not supported in this environment.' )
+					: __( 'Prompt execution was prevented by a filter.' );
+
 				// For generate_* and convert_text_to_speech* methods, create a WP_Error.
 				$this->error = new WP_Error(
 					'prompt_prevented',
-					__( 'Prompt execution was prevented by a filter.' ),
+					$error_message,
 					array(
 						'exception_class' => 'WP_AI_Client_Prompt_Prevented',
 					)