fix: render error messages for invalid templates

apps/remix/app/components/general/direct-template/direct-template-invalid-page.tsx

@@ -0,0 +1,23 @@
+import { Trans } from '@lingui/react/macro';
+import { AlertTriangleIcon } from 'lucide-react';
+
+export const DirectTemplateInvalidPageView = () => {
+  return (
+    <div className="mx-auto flex h-[70vh] w-full max-w-md flex-col items-center justify-center">
+      <div>
+        <AlertTriangleIcon className="h-10 w-10 text-destructive" />
+
+        <h1 className="mt-4 font-semibold text-3xl">
+          <Trans>Invalid direct link template</Trans>
+        </h1>
+
+        <p className="mt-2 text-muted-foreground text-sm">
+          <Trans>
+            This direct link template cannot be used because one or more signers do not have a signature field assigned.
+            Please contact the sender to update the template.
+          </Trans>
+        </p>
+      </div>
+    </div>
+  );
+};

apps/remix/app/components/general/envelope-editor/envelope-editor-fields-page.tsx

@@ -54,6 +54,7 @@ import { useCurrentTeam } from '~/providers/team';
 
 import { EnvelopeEditorFieldDragDrop } from './envelope-editor-fields-drag-drop';
 import { EnvelopeEditorFieldsPageRenderer } from './envelope-editor-fields-page-renderer';
+import { EnvelopeEditorInvalidDirectTemplateAlert } from './envelope-editor-invalid-direct-template-alert';
 import { EnvelopeRendererFileSelector } from './envelope-file-selector';
 import { EnvelopeRecipientSelector } from './envelope-recipient-selector';
 
@@ -238,6 +239,8 @@ export const EnvelopeEditorFieldsPage = () => {
           }
         />
 
+        <EnvelopeEditorInvalidDirectTemplateAlert />
+
         {/* Document View */}
         <div className="mt-4 flex h-full flex-col items-center justify-center">
           {envelope.recipients.length === 0 && (

apps/remix/app/components/general/envelope-editor/envelope-editor-invalid-direct-template-alert.tsx

@@ -0,0 +1,55 @@
+import { useCurrentEnvelopeEditor } from '@documenso/lib/client-only/providers/envelope-editor-provider';
+import { getRecipientsWithMissingFields } from '@documenso/lib/utils/recipients';
+import { cn } from '@documenso/ui/lib/utils';
+import { Alert, AlertDescription, AlertTitle } from '@documenso/ui/primitives/alert';
+import { Trans } from '@lingui/react/macro';
+import { useMemo } from 'react';
+
+export type EnvelopeEditorInvalidDirectTemplateAlertProps = {
+  className?: string;
+};
+
+/**
+ * Warns that a direct link template cannot be used because one or more signers
+ * are missing a signature field.
+ */
+export const EnvelopeEditorInvalidDirectTemplateAlert = ({
+  className,
+}: EnvelopeEditorInvalidDirectTemplateAlertProps) => {
+  const { envelope, isTemplate } = useCurrentEnvelopeEditor();
+
+  const signersMissingSignatureFields = useMemo(() => {
+    if (!isTemplate || !envelope.directLink?.enabled) {
+      return [];
+    }
+
+    return getRecipientsWithMissingFields(envelope.recipients, envelope.fields);
+  }, [isTemplate, envelope.directLink, envelope.recipients, envelope.fields]);
+
+  if (signersMissingSignatureFields.length === 0) {
+    return null;
+  }
+
+  return (
+    <Alert
+      variant="destructive"
+      className={cn('mx-auto w-full max-w-[800px] flex-row items-start gap-3 rounded-sm', className)}
+    >
+      <AlertTitle>
+        <Trans>Invalid direct link template</Trans>
+      </AlertTitle>
+
+      <AlertDescription>
+        <Trans>
+          Recipients cannot use this direct link template because the following signers are missing a signature field
+        </Trans>
+
+        <ul className="list-disc pl-5">
+          {signersMissingSignatureFields.map((recipient, i) => (
+            <li key={i}>{recipient.email || recipient.name || `Recipient ${i + 1}`}</li>
+          ))}
+        </ul>
+      </AlertDescription>
+    </Alert>
+  );
+};

apps/remix/app/components/general/envelope-editor/envelope-editor-preview-page.tsx

@@ -22,6 +22,7 @@ import { match } from 'ts-pattern';
 import { EnvelopeGenericPageRenderer } from '~/components/general/envelope-editor/envelope-generic-page-renderer';
 import { EnvelopePdfViewer } from '~/components/general/pdf-viewer/envelope-pdf-viewer';
 
+import { EnvelopeEditorInvalidDirectTemplateAlert } from './envelope-editor-invalid-direct-template-alert';
 import { EnvelopeRendererFileSelector } from './envelope-file-selector';
 
 export const EnvelopeEditorPreviewPage = () => {
@@ -228,6 +229,8 @@ export const EnvelopeEditorPreviewPage = () => {
           {/* Horizontal envelope item selector */}
           <EnvelopeRendererFileSelector className="px-0" fields={editorFields.localFields} />
 
+          <EnvelopeEditorInvalidDirectTemplateAlert className="mb-4" />
+
           <Alert variant="warning" className="mx-auto max-w-[800px]">
             <AlertTitle>
               <Trans>Preview Mode</Trans>