feat: add tlon channel plugin

extensions/tlon/src/targets.ts

@@ -0,0 +1,79 @@
+export type TlonTarget =
+  | { kind: "dm"; ship: string }
+  | { kind: "group"; nest: string; hostShip: string; channelName: string };
+
+const SHIP_RE = /^~?[a-z-]+$/i;
+const NEST_RE = /^chat\/([^/]+)\/([^/]+)$/i;
+
+export function normalizeShip(raw: string): string {
+  const trimmed = raw.trim();
+  if (!trimmed) return trimmed;
+  return trimmed.startsWith("~") ? trimmed : `~${trimmed}`;
+}
+
+export function parseChannelNest(raw: string): { hostShip: string; channelName: string } | null {
+  const match = NEST_RE.exec(raw.trim());
+  if (!match) return null;
+  const hostShip = normalizeShip(match[1]);
+  const channelName = match[2];
+  return { hostShip, channelName };
+}
+
+export function parseTlonTarget(raw?: string | null): TlonTarget | null {
+  const trimmed = raw?.trim();
+  if (!trimmed) return null;
+  const withoutPrefix = trimmed.replace(/^tlon:/i, "");
+
+  const dmPrefix = withoutPrefix.match(/^dm[/:](.+)$/i);
+  if (dmPrefix) {
+    return { kind: "dm", ship: normalizeShip(dmPrefix[1]) };
+  }
+
+  const groupPrefix = withoutPrefix.match(/^(group|room)[/:](.+)$/i);
+  if (groupPrefix) {
+    const groupTarget = groupPrefix[2].trim();
+    if (groupTarget.startsWith("chat/")) {
+      const parsed = parseChannelNest(groupTarget);
+      if (!parsed) return null;
+      return {
+        kind: "group",
+        nest: `chat/${parsed.hostShip}/${parsed.channelName}`,
+        hostShip: parsed.hostShip,
+        channelName: parsed.channelName,
+      };
+    }
+    const parts = groupTarget.split("/");
+    if (parts.length === 2) {
+      const hostShip = normalizeShip(parts[0]);
+      const channelName = parts[1];
+      return {
+        kind: "group",
+        nest: `chat/${hostShip}/${channelName}`,
+        hostShip,
+        channelName,
+      };
+    }
+    return null;
+  }
+
+  if (withoutPrefix.startsWith("chat/")) {
+    const parsed = parseChannelNest(withoutPrefix);
+    if (!parsed) return null;
+    return {
+      kind: "group",
+      nest: `chat/${parsed.hostShip}/${parsed.channelName}`,
+      hostShip: parsed.hostShip,
+      channelName: parsed.channelName,
+    };
+  }
+
+  if (SHIP_RE.test(withoutPrefix)) {
+    return { kind: "dm", ship: normalizeShip(withoutPrefix) };
+  }
+
+  return null;
+}
+
+export function formatTargetHint(): string {
+  return "dm/~sampel-palnet | ~sampel-palnet | chat/~host-ship/channel | group:~host-ship/channel";
+}