✨(print) add "Print" button in messages context menu

src/frontend/public/locales/common/en-US.json

@@ -349,6 +349,7 @@
   "Please enter a valid email address.": "Please enter a valid email address.",
   "Prefix can only contain letters, numbers, dots, underscores and hyphens.": "Prefix can only contain letters, numbers, dots, underscores and hyphens.",
   "Prefix is required.": "Prefix is required.",
+  "Print": "Print",
   "Read": "Read",
   "Read state": "Read state",
   "Recurring": "Recurring",

src/frontend/public/locales/common/fr-FR.json

@@ -349,6 +349,7 @@
   "Please enter a valid email address.": "Veuillez saisir une adresse email valide.",
   "Prefix can only contain letters, numbers, dots, underscores and hyphens.": "Le préfixe ne peut contenir que des lettres, chiffres, points, tirets bas et tirets.",
   "Prefix is required.": "Le préfixe est requis.",
+  "Print": "Imprimer",
   "Read": "Lu",
   "Read state": "État de lecture",
   "Recurring": "Récurrent",

src/frontend/public/locales/common/nl-NL.json

@@ -274,6 +274,7 @@
   "Please enter a valid email address.": "Vul een correct email-adres in.",
   "Prefix can only contain letters, numbers, dots, underscores and hyphens.": "Voorvoegsel kan alleen letters, cijfers, punten, onderstrepingstekens en koppeltekens bevatten.",
   "Prefix is required.": "Voorvoegsel is vereist.",
+  "Print": "Afdrukken",
   "Read": "Lees",
   "Read state": "Lees status",
   "Redirection": "Omleiding",

src/frontend/src/features/layouts/components/thread-view/components/thread-message/thread-message-actions.tsx

@@ -5,6 +5,7 @@ import { DropdownMenu, Icon, IconType } from "@gouvfr-lasuite/ui-kit";
 import { getMessagesEmlRetrieveUrl } from "@/features/api/gen/messages/messages";
 import { getRequestUrl } from "@/features/api/utils";
 import { useMailboxContext } from "@/features/providers/mailbox";
+import usePrint from "@/features/message/use-print";
 import useRead from "@/features/message/use-read";
 import useTrash from "@/features/message/use-trash";
 import { ThreadMessageActionsProps } from "./types";
@@ -25,6 +26,7 @@ const ThreadMessageActions = ({
     const { unselectThread, selectedThread, messages } = useMailboxContext();
     const { markAsUnread, markAsRead } = useRead();
     const { markAsTrashed } = useTrash();
+    const { print } = usePrint();
 
     const hasSiblingMessages = useMemo(() => {
         if (!selectedThread) return false;
@@ -80,6 +82,11 @@ const ThreadMessageActions = ({
             icon: <Icon type={IconType.FILLED} name="mark_email_unread" />,
             callback: () => toggleReadStateFrom(true)
         }]),
+        {
+            label: t('Print'),
+            icon: <Icon type={IconType.FILLED} name="print" />,
+            callback: () => print(message)
+        },
         {
             label: t('Download raw email'),
             icon: <Icon type={IconType.FILLED} name="download" />,

src/frontend/src/features/message/use-print.tsx

@@ -0,0 +1,77 @@
+import { useCallback } from "react";
+import { renderToStaticMarkup } from "react-dom/server";
+import { useTranslation } from "react-i18next";
+import { Message } from "@/features/api/gen/models";
+
+const formatContact = (c: { name?: string | null; email: string }) =>
+    c.name ? `${c.name} <${c.email}>` : c.email;
+
+/**
+ * Hook to print a message in a new browser window
+ */
+const usePrint = () => {
+    const { t, i18n } = useTranslation();
+
+    const print = useCallback((message: Message) => {
+        const iframe = document
+            .querySelector(`#thread-message-${message.id} .thread-message__body`) as HTMLIFrameElement | null;
+        const bodyHtml = iframe?.contentDocument?.body?.innerHTML;
+        if (!bodyHtml) return;
+
+        const date = new Date(message.sent_at ?? message.created_at);
+        const formattedDate = date.toLocaleString(i18n.resolvedLanguage, {
+            dateStyle: 'full',
+            timeStyle: 'short',
+        });
+
+        const headers = [
+            { label: t('From'), value: formatContact(message.sender) },
+            { label: t('To'), value: message.to.map((r) => formatContact(r.contact)).join(', ') },
+            ...(message.cc.length ? [{ label: t('Cc'), value: message.cc.map((r) => formatContact(r.contact)).join(', ') }] : []),
+            ...(message.bcc.length ? [{ label: t('Bcc'), value: message.bcc.map((r) => formatContact(r.contact)).join(', ') }] : []),
+            { label: t('Date'), value: formattedDate },
+            { label: t('Subject'), value: message.subject ?? '' },
+        ];
+
+        const html = '<!DOCTYPE html>' + renderToStaticMarkup(
+            <html>
+                <head>
+                    <meta charSet="utf-8" />
+                    <title>{message.subject ?? ''}</title>
+                    <style>{`
+                        body { font-family: system-ui, -apple-system, sans-serif; margin: 2em; color: #000; }
+                        table { font-size: 14px; border-collapse: collapse; }
+                        hr { border: none; border-top: 1px solid #ccc; margin: 16px 0; }
+                        .body { font-size: 14px; }
+                        .body img { max-width: 100%; }
+                        @media print { body { margin: 0; } }
+                    `}</style>
+                </head>
+                <body>
+                    <table>
+                        {headers.map((h, i) => (
+                            <tr key={i}>
+                                <td style={{ fontWeight: 'bold', padding: '2px 12px 2px 0', whiteSpace: 'nowrap', verticalAlign: 'top' }}>{h.label}</td>
+                                <td style={{ padding: '2px 0' }}>{h.value}</td>
+                            </tr>
+                        ))}
+                    </table>
+                    <hr />
+                    <div className="body" dangerouslySetInnerHTML={{ __html: bodyHtml }} />
+                </body>
+            </html>
+        );
+
+        const printWindow = window.open('');
+        if (!printWindow) return;
+
+        printWindow.document.write(html);
+        printWindow.document.close();
+        printWindow.addEventListener('afterprint', () => printWindow.close());
+        printWindow.onload = () => printWindow.print();
+    }, [t, i18n.resolvedLanguage]);
+
+    return { print };
+};
+
+export default usePrint;