validate countrycodes, lat, lon fields even when hidden (#109)

[nominatim-ui.git] / src / components / UrlSubmitForm.svelte

diff --git a/src/components/UrlSubmitForm.svelte b/src/components/UrlSubmitForm.svelte
index 019fa8c9f007b1932bc3ac8d42e365a75d150e8c..975e79fc2fa61780e367acbecd1e5516bffc2a9a 100644 (file)
--- a/src/components/UrlSubmitForm.svelte
+++ b/src/components/UrlSubmitForm.svelte
@@ -17,8 +17,32 @@
 
     return params;
   }
+
+  // https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/HTML5/Constraint_validation
+  // doesn't support hidden fields, so we check those in an extra step
+  function validate_field(field) {
+    if (field.type === 'hidden') {
+      if (field.pattern && !field.value.match(field.pattern)) return false;
+    }
+    return field.checkValidity(); // for hidden field always true
+  }
+
+  function handle_submit(event) {
+    let form = event.target;
+
+    let allow_submit = true;
+
+    Array.prototype.slice.call(form.elements).forEach(function (field) {
+      if (!validate_field(field)) {
+        alert('Invalid input in ' + field.name);
+        allow_submit = false;
+      }
+    });
+
+    if (allow_submit) refresh_page(page, serialize_form(form));
+  }
 </script>
 
-<form on:submit|preventDefault={(e) => refresh_page(page, serialize_form(e.target))} class="form-inline" role="search" accept-charset="UTF-8" action="">
+<form on:submit|preventDefault={handle_submit} class="form-inline" role="search" accept-charset="UTF-8" action="">
   <slot></slot>
 </form>