refactor(imessage): dedupe outbound media limit resolve

src/channels/plugins/outbound/imessage.ts

@@ -3,6 +3,19 @@ import { chunkText } from "../../../auto-reply/chunk.js";
 import { sendMessageIMessage } from "../../../imessage/send.js";
 import { resolveChannelMediaMaxBytes } from "../media-limits.js";
 
+function resolveIMessageMaxBytes(params: {
+  cfg: Parameters<typeof resolveChannelMediaMaxBytes>[0]["cfg"];
+  accountId?: string | null;
+}) {
+  return resolveChannelMediaMaxBytes({
+    cfg: params.cfg,
+    resolveChannelLimitMb: ({ cfg, accountId }) =>
+      cfg.channels?.imessage?.accounts?.[accountId]?.mediaMaxMb ??
+      cfg.channels?.imessage?.mediaMaxMb,
+    accountId: params.accountId,
+  });
+}
+
 export const imessageOutbound: ChannelOutboundAdapter = {
   deliveryMode: "direct",
   chunker: chunkText,
@@ -10,13 +23,7 @@ export const imessageOutbound: ChannelOutboundAdapter = {
   textChunkLimit: 4000,
   sendText: async ({ cfg, to, text, accountId, deps }) => {
     const send = deps?.sendIMessage ?? sendMessageIMessage;
-    const maxBytes = resolveChannelMediaMaxBytes({
+    const maxBytes = resolveIMessageMaxBytes({ cfg, accountId });
-      cfg,
-      resolveChannelLimitMb: ({ cfg, accountId }) =>
-        cfg.channels?.imessage?.accounts?.[accountId]?.mediaMaxMb ??
-        cfg.channels?.imessage?.mediaMaxMb,
-      accountId,
-    });
     const result = await send(to, text, {
       maxBytes,
       accountId: accountId ?? undefined,
@@ -25,13 +32,7 @@ export const imessageOutbound: ChannelOutboundAdapter = {
   },
   sendMedia: async ({ cfg, to, text, mediaUrl, mediaLocalRoots, accountId, deps }) => {
     const send = deps?.sendIMessage ?? sendMessageIMessage;
-    const maxBytes = resolveChannelMediaMaxBytes({
+    const maxBytes = resolveIMessageMaxBytes({ cfg, accountId });
-      cfg,
-      resolveChannelLimitMb: ({ cfg, accountId }) =>
-        cfg.channels?.imessage?.accounts?.[accountId]?.mediaMaxMb ??
-        cfg.channels?.imessage?.mediaMaxMb,
-      accountId,
-    });
     const result = await send(to, text, {
       mediaUrl,
       maxBytes,