autonomous.contact/public/js/smartforms.js

document.addEventListener("DOMContentLoaded", () => {
	/* make all forms semi-smart */
	const forms = document.querySelectorAll("form[data-smart]");
	for (const form of forms) {
		async function on_submit(event) {
			event.preventDefault();
			form.disabled = true;

			if (form.on_submit) {
				const result = await form.on_submit(event);
				if (result === false) {
					form.disabled = false;
					return;
				}
			}

			const url = form.action;
			const method = form.dataset.method ?? "POST";

			const json = {};

			const form_data = new FormData(form);
			for (const [key, value] of form_data.entries()) {
				const elements = key.split(".");
				let current = json;
				for (const element of elements.slice(0, elements.length - 1)) {
					current[element] = current[element] ?? {};
					current = current[element];
				}

				current[elements.slice(elements.length - 1).shift()] = value;
			}

			if (form.on_parsed) {
				await form.on_parsed(json);
			}

			try {
				const options = {
					method,
					headers: {
						Accept: "application/json",
					},
				};

				if (["POST", "PUT", "PATCH"].includes(method)) {
					options.json = json;
				}

				const response = await api.fetch(url, options);

				if (!response.ok) {
					const error_body = await response.json();
					const error = error_body?.error;

					if (form.on_error) {
						return form.on_error(error);
					}

					alert(error.message ?? "Unknown error!");
					return;
				}

				if (form.on_response) {
					await form.on_response(response);
				}

				const response_body = await response.json();
				if (form.on_reply) {
					return form.on_reply(response_body);
				}
			} catch (error) {
				console.dir({
					error,
				});

				if (form.on_error) {
					return form.on_error(error);
				}

				alert(error);
			} finally {
				form.disabled = false;
			}
		}

		form.addEventListener("submit", on_submit);
		//form.onsubmit = on_submit;
	}
});