woocommerce-paypal-payments/modules/ppcp-button/resources/js/VaultV2/FreeTrialHandler.js

class FreeTrialHandler {
	/**
	 * @param                      config
	 * @param                      formSelector
	 * @param {FormSaver}          formSaver
	 * @param {FormValidator|null} formValidator
	 * @param {Spinner}            spinner
	 * @param {ErrorHandler}       errorHandler
	 */
	constructor(
		config,
		formSelector,
		formSaver,
		formValidator,
		spinner,
		errorHandler
	) {
		this.config = config;
		this.formSelector = formSelector;
		this.formSaver = formSaver;
		this.formValidator = formValidator;
		this.spinner = spinner;
		this.errorHandler = errorHandler;
	}

	async handle() {
		this.spinner.block();

		try {
			await this.formSaver.save(
				document.querySelector( this.formSelector )
			);
		} catch ( error ) {
			console.error( error );
		}

		try {
			if ( this.formValidator ) {
				try {
					const errors = await this.formValidator.validate(
						document.querySelector( this.formSelector )
					);
					if ( errors.length > 0 ) {
						this.spinner.unblock();
						this.errorHandler.messages( errors );

						// fire WC event for other plugins
						jQuery( document.body ).trigger( 'checkout_error', [
							this.errorHandler.currentHtml(),
						] );

						return;
					}
				} catch ( error ) {
					console.error( error );
				}
			}

			const res = await fetch( this.config.ajax.vault_paypal.endpoint, {
				method: 'POST',
				headers: {
					'Content-Type': 'application/json',
				},
				credentials: 'same-origin',
				body: JSON.stringify( {
					nonce: this.config.ajax.vault_paypal.nonce,
					return_url: location.href,
				} ),
			} );

			const data = await res.json();

			if ( ! data.success ) {
				throw Error( data.data.message );
			}

			location.href = data.data.approve_link;
		} catch ( error ) {
			this.spinner.unblock();
			console.error( error );
			this.errorHandler.message( data.data.message );
		}
	}
}
export default FreeTrialHandler;