fix(imessage): normalize messaging targets (#1708)

Co-authored-by: Aaron Ng <1653630+aaronn@users.noreply.github.com>

src/imessage/targets.test.ts

@@ -28,6 +28,27 @@ describe("imessage targets", () => {
     expect(normalizeIMessageHandle(" +1 (555) 222-3333 ")).toBe("+15552223333");
   });
 
+  it("normalizes chat_id prefixes case-insensitively", () => {
+    expect(normalizeIMessageHandle("CHAT_ID:123")).toBe("chat_id:123");
+    expect(normalizeIMessageHandle("Chat_Id:456")).toBe("chat_id:456");
+    expect(normalizeIMessageHandle("chatid:789")).toBe("chat_id:789");
+    expect(normalizeIMessageHandle("CHAT:42")).toBe("chat_id:42");
+  });
+
+  it("normalizes chat_guid prefixes case-insensitively", () => {
+    expect(normalizeIMessageHandle("CHAT_GUID:abc-def")).toBe("chat_guid:abc-def");
+    expect(normalizeIMessageHandle("ChatGuid:XYZ")).toBe("chat_guid:XYZ");
+    expect(normalizeIMessageHandle("GUID:test-guid")).toBe("chat_guid:test-guid");
+  });
+
+  it("normalizes chat_identifier prefixes case-insensitively", () => {
+    expect(normalizeIMessageHandle("CHAT_IDENTIFIER:iMessage;-;chat123")).toBe(
+      "chat_identifier:iMessage;-;chat123",
+    );
+    expect(normalizeIMessageHandle("ChatIdentifier:test")).toBe("chat_identifier:test");
+    expect(normalizeIMessageHandle("CHATIDENT:foo")).toBe("chat_identifier:foo");
+  });
+
   it("checks allowFrom against chat_id", () => {
     const ok = isAllowedIMessageSender({
       allowFrom: ["chat_id:9"],

src/imessage/targets.ts

@@ -34,6 +34,27 @@ export function normalizeIMessageHandle(raw: string): string {
   if (lowered.startsWith("imessage:")) return normalizeIMessageHandle(trimmed.slice(9));
   if (lowered.startsWith("sms:")) return normalizeIMessageHandle(trimmed.slice(4));
   if (lowered.startsWith("auto:")) return normalizeIMessageHandle(trimmed.slice(5));
+
+  // Normalize chat_id/chat_guid/chat_identifier prefixes case-insensitively
+  for (const prefix of CHAT_ID_PREFIXES) {
+    if (lowered.startsWith(prefix)) {
+      const value = trimmed.slice(prefix.length).trim();
+      return `chat_id:${value}`;
+    }
+  }
+  for (const prefix of CHAT_GUID_PREFIXES) {
+    if (lowered.startsWith(prefix)) {
+      const value = trimmed.slice(prefix.length).trim();
+      return `chat_guid:${value}`;
+    }
+  }
+  for (const prefix of CHAT_IDENTIFIER_PREFIXES) {
+    if (lowered.startsWith(prefix)) {
+      const value = trimmed.slice(prefix.length).trim();
+      return `chat_identifier:${value}`;
+    }
+  }
+
   if (trimmed.includes("@")) return trimmed.toLowerCase();
   const normalized = normalizeE164(trimmed);
   if (normalized) return normalized;