Threema Gateway

src/components/channel-users/channel-users.tsx

@@ -8,12 +8,26 @@ import { useRouter } from "next/navigation";
 const CHANNEL_ID_HELP: Record<string, string> = {
   telegram: "telegramIdHelp",
   discord: "discordIdHelp",
+  threema: "threemaIdHelp",
   // email entry dropped in the Phase A rework — IMAP/SMTP is handled by
   // the `mail` skill (category=skill, not channel), so it never appears
   // in `enabledChannels`. If a future channel is added to the catalog,
   // give it an entry here so the help blurb renders.
 };
 
+/**
+ * Channels whose user list is managed through a dedicated endpoint
+ * instead of the generic PATCH /api/tenants/:name flow.
+ *
+ * Threema is the only one today — adding/removing a Threema ID has to
+ * synchronise with the central pieced-threema-gateway relay's `routes`
+ * table (uniqueness enforced there, not in K8s). The
+ * /api/tenants/:name/threema/routes endpoint owns that two-step
+ * coordination (relay first, then K8s, with compensation on K8s
+ * failure). Other channels just patch the K8s spec directly.
+ */
+const RELAY_MANAGED_CHANNELS = new Set(["threema"]);
+
 interface ChannelUsersProps {
   tenantName: string;
   /** Currently enabled channel packages (e.g. ["telegram", "discord"]) */
@@ -63,6 +77,70 @@ export function ChannelUsers({
     [tenantName, router]
   );
 
+  /**
+   * Threema (and any future relay-managed channel) uses a dedicated
+   * endpoint that synchronises the central relay's routes table with
+   * the K8s spec atomically. We call it per-ID rather than sending the
+   * whole array because uniqueness is enforced ID-by-ID at the relay,
+   * and the error UX of "this ID is taken" is per-add.
+   */
+  const addToRelayChannel = useCallback(
+    async (channel: string, threemaId: string) => {
+      setSaving(true);
+      setError("");
+      try {
+        const res = await fetch(
+          `/api/tenants/${tenantName}/${channel}/routes`,
+          {
+            method: "POST",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ threemaId }),
+          }
+        );
+        if (!res.ok) {
+          const data = await res.json().catch(() => ({}));
+          throw new Error(data.error || `Add failed (HTTP ${res.status})`);
+        }
+        setChannelUsers((prev) => {
+          const current = prev[channel] ?? [];
+          if (current.includes(threemaId)) return prev;
+          return { ...prev, [channel]: [...current, threemaId] };
+        });
+        router.refresh();
+      } catch (e: any) {
+        setError(e.message);
+      } finally {
+        setSaving(false);
+      }
+    },
+    [tenantName, router]
+  );
+
+  const removeFromRelayChannel = useCallback(
+    async (channel: string, threemaId: string) => {
+      setSaving(true);
+      setError("");
+      try {
+        const url = `/api/tenants/${tenantName}/${channel}/routes?threemaId=${encodeURIComponent(threemaId)}`;
+        const res = await fetch(url, { method: "DELETE" });
+        if (!res.ok) {
+          const data = await res.json().catch(() => ({}));
+          throw new Error(data.error || `Remove failed (HTTP ${res.status})`);
+        }
+        setChannelUsers((prev) => {
+          const current = prev[channel] ?? [];
+          return { ...prev, [channel]: current.filter((id) => id !== threemaId) };
+        });
+        router.refresh();
+      } catch (e: any) {
+        setError(e.message);
+      } finally {
+        setSaving(false);
+      }
+    },
+    [tenantName, router]
+  );
+
   const handleAdd = useCallback(
     (channel: string) => {
       const userId = inputValues[channel]?.trim();
@@ -74,18 +152,27 @@ export function ChannelUsers({
         return;
       }
 
-      const updated = {
-        ...channelUsers,
-        [channel]: [...current, userId],
-      };
       setInputValues((prev) => ({ ...prev, [channel]: "" }));
-      updateChannelUsers(updated);
+
+      if (RELAY_MANAGED_CHANNELS.has(channel)) {
+        void addToRelayChannel(channel, userId);
+      } else {
+        const updated = {
+          ...channelUsers,
+          [channel]: [...current, userId],
+        };
+        updateChannelUsers(updated);
+      }
     },
-    [channelUsers, inputValues, updateChannelUsers, t]
+    [channelUsers, inputValues, updateChannelUsers, addToRelayChannel, t]
   );
 
   const handleRemove = useCallback(
     (channel: string, userId: string) => {
+      if (RELAY_MANAGED_CHANNELS.has(channel)) {
+        void removeFromRelayChannel(channel, userId);
+        return;
+      }
       const current = channelUsers[channel] || [];
       const updated = {
         ...channelUsers,
@@ -93,7 +180,7 @@ export function ChannelUsers({
       };
       updateChannelUsers(updated);
     },
-    [channelUsers, updateChannelUsers]
+    [channelUsers, updateChannelUsers, removeFromRelayChannel]
   );
 
   if (enabledChannels.length === 0) return null;