chore: revert __call() check in favor of constructor

Author: justlevine

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

@@ -297,35 +297,26 @@ 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 ) ) {
-			// 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 );
-			}
+			/**
+			 * 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',
-					$error_message,
+					__( 'Prompt execution was prevented by a filter.' ),
 					array(
 						'exception_class' => 'WP_AI_Client_Prompt_Prevented',
 					)

tests/phpunit/tests/ai-client/wpAiClientPromptBuilder.php

@@ -2395,6 +2395,19 @@ public function test_using_ability_method_chaining() {
 		$this->assertEquals( 500, $config->getMaxTokens() );
 	}
 
+	/**
+	 * Tests that is_supported returns false when prevent prompt filter returns true.
+	 *
+	 * @ticket 64591
+	 */
+	public function test_is_supported_returns_false_when_ai_not_supported() {
+		add_filter( 'wp_supports_ai', '__return_false' );
+
+		$builder = new WP_AI_Client_Prompt_Builder( AiClient::defaultRegistry(), 'Test prompt' );
+
+		$this->assertFalse( $builder->is_supported() );
+	}
+
 	/**
 	 * Tests that is_supported returns false when prevent prompt filter returns true.
 	 *
@@ -2407,7 +2420,6 @@ public function test_is_supported_returns_false_when_filter_prevents_prompt() {
 
 		$this->assertFalse( $builder->is_supported() );
 	}
-
 	/**
 	 * Tests that generate_result returns WP_Error when prevent prompt filter returns true.
 	 *