functions.php

<?php

use PhpOffice\PhpWord\IOFactory;
use PhpOffice\PhpWord\PhpWord;
use PhpOffice\PhpWord\Shared\Converter;
use PhpOffice\PhpWord\Shared\Html;

add_action( 'wp_enqueue_scripts', 'vpresearch_theme_enqueue_styles' );
function vpresearch_theme_enqueue_styles() {

	// Enqueue parent stylesheet
	wp_enqueue_style( 'child-style', get_stylesheet_uri(),
		array( 'parenthandle' ),
		wp_get_theme()->get( 'Version' ) // this only works if you have Version in the style header
	);

	// Enqueue child stylesheet
	wp_enqueue_style( 'corral-style', get_stylesheet_uri() );

	if ( is_page_template( 'template-corral-vue.php' ) ) {
		// Local development
		// wp_register_script( 'vpr-corral-vue-app', get_home_url( 1 ) . ':8080/js/app.js', array(), false, true );

		// Production build
		wp_enqueue_script( 'vpr-corral-vue-app', get_stylesheet_directory_uri() . '/corral-vue/dist/js/app.js', array(), filemtime( get_template_directory() . '/corral-vue/dist/app.js' ), true );

		$object = array(
			'baseUrl'  => get_site_url(),
			'response' => json_decode( vpr_get_corral() )
		);
		wp_localize_script( 'vpr-corral-vue-app', 'wp_data', $object );
		wp_enqueue_script( 'vpr-corral-vue-app' );
	}
}

/**
 * Get all facilities with resources
 *
 * @return bool|string
 */
function vpr_get_corral() {
	$ch = curl_init();

	curl_setopt( $ch, CURLOPT_URL, 'https://ep2dev.orsc.utexas.edu/services/api/v1/core-facility/facilities' );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
	curl_setopt( $ch, CURLOPT_CUSTOMREQUEST, 'GET' );

	curl_setopt( $ch, CURLOPT_USERPWD, 'vpr01' . ':' . 'sTeputrupenu26Stakur88epEyanUth8' );

	$result = curl_exec( $ch );
	if ( curl_errno( $ch ) ) {
		echo 'Error:' . curl_error( $ch );
	}
	curl_close( $ch );

	return $result;
}

add_action( 'rest_api_init', 'vpr_get_corral_api_endpoints' );
function vpr_get_corral_api_endpoints() {
	register_rest_route(
		'corral-api',
		'/export',
		array(
			array(
				'methods'  => WP_REST_Server::ALLMETHODS,
				'callback' => 'export_file',
				'args'     => array(
					'data' => array(
						'default' => null,
					),
				),
			),
		)
	);
}

/**
 * Generate and save file for download
 *
 * @param $request
 *
 * @return false|string
 */
function export_file( $request ) {
	require_once( get_stylesheet_directory() . '/vendor/autoload.php' );
	require_once( ABSPATH . 'wp-admin/includes/file.php' );
	global $wp_filesystem;

	// Get posted data
	$method     = $request->get_param( 'method' );
	$content    = $request->get_param( 'editor' );
	$itemsArray = json_decode( $request->get_param( 'itemsArray' ) );
	$upload_dir = wp_upload_dir();
	$dir        = trailingslashit( $upload_dir['basedir'] ) . 'text-tool';
	$subdir     = "/tmp/";
	$filename   = "download-" . time();
	$filepath   = get_home_url( 1 ) . "/wp-content/uploads/sites/" . get_current_blog_id() . "/text-tool/tmp/";

	if ( ! is_file( $dir . $subdir . $filename ) ) {
		WP_Filesystem();

		// Create main folder within upload if not exist
		if ( ! $wp_filesystem->is_dir( $dir ) ) {
			$wp_filesystem->mkdir( $dir );
		}

		// Create a sub-folder in my new folder if not exist
		if ( ! $wp_filesystem->is_dir( $dir . $subdir ) ) {
			$wp_filesystem->mkdir( $dir . $subdir );
		}

		// Delete similar files
		// foreach ( glob( $dir . "/tmp/download-*.*" ) as $filename ) {
		// 	unlink( $filename );
		// }
	}

	switch ( $method ) {
		case ( 'word' ):
			try {
				// Initialize PHPWord
				$phpWord     = new PhpWord();
				$phpWordHTML = new Html();

				// Set default font size
				$phpWord->setDefaultFontName( "Helvetica" );
				$phpWord->setDefaultFontSize( 12 );
				$phpWord->setDefaultParagraphStyle(
					array(
						'spaceAfter' => Converter::pointToTwip( 12 ),
						'spacing'    => 80,
					)
				);

				// Create a new page section
				$section = $phpWord->addSection();

				// Add content to page section
				$phpWordHTML->addHtml( $section, $content );

				// Save file and set permission to 0644
				$filename  = $filename . ".docx";
				$objWriter = IOFactory::createWriter( $phpWord );
				$objWriter->save( $dir . $subdir . $filename );

				$response = array(
					'wp_upload_dir' => $upload_dir,
					'filepath'      => $filepath . $filename,
					'status'        => 'success'
				);
			} catch ( \PhpOffice\PhpWord\Exception\Exception $exception ) {
				$response = $exception;
			}
			break;
		case( 'excel' ):
			$data = [];

			foreach ( $itemsArray as $item ) :
				$data[] = [ $item->name, preg_replace( '/<[^>]*>/', '', $item->description ) ];

				foreach ( $item->resources as $resource ) :
					$data[] = [ $resource->name, preg_replace( '/<[^>]*>/', '', $resource->description ) ];
				endforeach;

				// Add separator between facilities
				$data[] = [''];
			endforeach;

			$filename = $filename . ".xlsx";
			SimpleXLSXGen::fromArray( $data )->saveAs( $dir . $subdir . $filename );

			$response = array(
				'wp_upload_dir' => $upload_dir,
				'filepath'      => $filepath . $filename,
				'status'        => 'success'
			);
			break;
		default:
			$response = true;
	}

	return json_encode( $response );
}