Migrate frontend to TypeScript with Deno-based tooling (#206)

Compiles assets/*.ts via sensiolabs/typescript-bundle (standalone SWC binary) and adds Deno for formatting, linting, type-checking, and tests, keeping the project's no-Node/npm approach intact. Wires all four into CI, the Justfile, and the pre-commit hook.
2026-07-12 21:05:19 +02:00 · 2026-07-12 19:08:21 +02:00
parent 8382900b9e
commit a4f8340b04
40 changed files with 1391 additions and 498 deletions
@@ -0,0 +1,129 @@
+const nameCheck = /^[-_a-zA-Z0-9]{4,22}$/;
+const tokenCheck = /^[-_/+a-zA-Z0-9]{24,}$/;
+
+interface TurboSubmitEventDetail {
+    formSubmission: {
+        formElement: HTMLFormElement;
+        fetchRequest: { headers: Record<string, string> };
+    };
+}
+
+const CSRF_FIELD_SELECTOR =
+    'input[data-controller="csrf-protection"], input[name="_csrf_token"]';
+
+// Generate and double-submit a CSRF token in a form field and a cookie, as defined by Symfony's SameOriginCsrfTokenManager
+// Use `form.requestSubmit()` to ensure that the submit event is triggered. Using `form.submit()` will not trigger the event
+// and thus this event-listener will not be executed.
+document.addEventListener('submit', function (event) {
+    generateCsrfToken(event.target as HTMLFormElement);
+}, true);
+
+// When @hotwired/turbo handles form submissions, send the CSRF token in a header in addition to a cookie
+// The `framework.csrf_protection.check_header` config option needs to be enabled for the header to be checked
+document.addEventListener('turbo:submit-start', function (event) {
+    const detail = (event as CustomEvent<TurboSubmitEventDetail>).detail;
+    const h = generateCsrfHeaders(detail.formSubmission.formElement);
+    Object.keys(h).forEach(function (k) {
+        detail.formSubmission.fetchRequest.headers[k] = h[k];
+    });
+});
+
+// When @hotwired/turbo handles form submissions, remove the CSRF cookie once a form has been submitted
+document.addEventListener('turbo:submit-end', function (event) {
+    const detail = (event as CustomEvent<TurboSubmitEventDetail>).detail;
+    removeCsrfToken(detail.formSubmission.formElement);
+});
+
+export function generateCsrfToken(formElement: HTMLFormElement): void {
+    const csrfField = formElement.querySelector<HTMLInputElement>(
+        CSRF_FIELD_SELECTOR,
+    );
+
+    if (!csrfField) {
+        return;
+    }
+
+    let csrfCookie = csrfField.getAttribute(
+        'data-csrf-protection-cookie-value',
+    );
+    let csrfToken = csrfField.value;
+
+    if (!csrfCookie && nameCheck.test(csrfToken)) {
+        csrfField.setAttribute(
+            'data-csrf-protection-cookie-value',
+            csrfCookie = csrfToken,
+        );
+        csrfField.defaultValue = csrfToken = btoa(
+            String.fromCharCode.apply(
+                null,
+                Array.from(
+                    (window.crypto ||
+                        (window as unknown as { msCrypto: Crypto }).msCrypto)
+                        .getRandomValues(new Uint8Array(18)),
+                ),
+            ),
+        );
+    }
+    csrfField.dispatchEvent(new Event('change', { bubbles: true }));
+
+    if (csrfCookie && tokenCheck.test(csrfToken)) {
+        const cookie = csrfCookie + '_' + csrfToken + '=' + csrfCookie +
+            '; path=/; samesite=strict';
+        document.cookie = window.location.protocol === 'https:'
+            ? '__Host-' + cookie + '; secure'
+            : cookie;
+    }
+}
+
+export function generateCsrfHeaders(
+    formElement: HTMLFormElement,
+): Record<string, string> {
+    const headers: Record<string, string> = {};
+    const csrfField = formElement.querySelector<HTMLInputElement>(
+        CSRF_FIELD_SELECTOR,
+    );
+
+    if (!csrfField) {
+        return headers;
+    }
+
+    const csrfCookie = csrfField.getAttribute(
+        'data-csrf-protection-cookie-value',
+    );
+
+    if (
+        tokenCheck.test(csrfField.value) && nameCheck.test(String(csrfCookie))
+    ) {
+        headers[String(csrfCookie)] = csrfField.value;
+    }
+
+    return headers;
+}
+
+export function removeCsrfToken(formElement: HTMLFormElement): void {
+    const csrfField = formElement.querySelector<HTMLInputElement>(
+        CSRF_FIELD_SELECTOR,
+    );
+
+    if (!csrfField) {
+        return;
+    }
+
+    const csrfCookie = csrfField.getAttribute(
+        'data-csrf-protection-cookie-value',
+    );
+
+    if (
+        tokenCheck.test(csrfField.value) && nameCheck.test(String(csrfCookie))
+    ) {
+        const cookie = String(csrfCookie) + '_' + csrfField.value +
+            '=0; path=/; samesite=strict; max-age=0';
+
+        document.cookie = window.location.protocol === 'https:'
+            ? '__Host-' + cookie + '; secure'
+            : cookie;
+    }
+}
+
+/* stimulusFetch: 'lazy' */
+export default 'csrf-protection-controller';