<?php

namespace Flow\Api;

use Flow\Block\Block;
use Flow\Model\Anchor;
use Flow\Model\UUID;
use Message;

abstract class ApiFlowBaseGet extends ApiFlowBase {
	public function execute() {
		$loader = $this->getLoader();
		$blocks = $loader->getBlocks();
		$context = $this->getContext();
		$action = $this->getAction();
		$passedParams = $this->getBlockParams();

		$output = [ $action => [
			'result' => [],
			'status' => 'ok',
		] ];

		/** @var Block $block */
		foreach ( $blocks as $block ) {
			$block->init( $context, $action );

			if ( $block->canRender( $action ) ) {
				$blockParams = [];
				if ( isset( $passedParams[$block->getName()] ) ) {
					$blockParams = $passedParams[$block->getName()];
				}

				$output[$action]['result'][$block->getName()] = $block->renderApi( $blockParams );
			}
		}

		// See if any of the blocks generated an error (in which case the
		// request will terminate with an the error message)
		$this->processError( $blocks );

		// If nothing could render, we'll consider that an error (at least some
		// block should've been able to render a GET request)
		if ( !$output[$action]['result'] ) {
			$this->dieWithError( 'flow-error-no-render', 'no-render' );
		}

		$blocks = array_keys( $output[$action]['result'] );
		$this->getResult()->setIndexedTagName( $blocks, 'block' );

		// Required until php5.4 which has the JsonSerializable interface
		array_walk_recursive( $output, function ( &$value ) {
			if ( $value instanceof Anchor ) {
				$value = $value->toArray();
			} elseif ( $value instanceof Message ) {
				$value = $value->text();
			} elseif ( $value instanceof UUID ) {
				$value = $value->getAlphadecimal();
			}
		} );

		$this->getResult()->addValue( null, $this->apiFlow->getModuleName(), $output );
	}

	/**
	 * @inheritDoc
	 */
	public function mustBePosted() {
		return false;
	}

	/**
	 * @inheritDoc
	 */
	public function needsToken() {
		return false;
	}
}