feat: Add Line plugin (#1630)

* feat: add LINE plugin (#1630) (thanks @plum-dawg)

* feat: complete LINE plugin (#1630) (thanks @plum-dawg)

* chore: drop line plugin node_modules (#1630) (thanks @plum-dawg)

* test: mock /context report in commands test (#1630) (thanks @plum-dawg)

* test: limit macOS CI workers to avoid OOM (#1630) (thanks @plum-dawg)

* test: reduce macOS CI vitest workers (#1630) (thanks @plum-dawg)

---------

Co-authored-by: Peter Steinberger <steipete@gmail.com>

src/line/bot-message-context.test.ts

@@ -0,0 +1,82 @@
+import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import fs from "node:fs/promises";
+import os from "node:os";
+import path from "node:path";
+import type { MessageEvent, PostbackEvent } from "@line/bot-sdk";
+import type { ClawdbotConfig } from "../config/config.js";
+import type { ResolvedLineAccount } from "./types.js";
+import { buildLineMessageContext, buildLinePostbackContext } from "./bot-message-context.js";
+
+describe("buildLineMessageContext", () => {
+  let tmpDir: string;
+  let storePath: string;
+  let cfg: ClawdbotConfig;
+  const account: ResolvedLineAccount = {
+    accountId: "default",
+    enabled: true,
+    channelAccessToken: "token",
+    channelSecret: "secret",
+    tokenSource: "config",
+    config: {},
+  };
+
+  beforeEach(async () => {
+    tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), "clawdbot-line-context-"));
+    storePath = path.join(tmpDir, "sessions.json");
+    cfg = { session: { store: storePath } };
+  });
+
+  afterEach(async () => {
+    await fs.rm(tmpDir, {
+      recursive: true,
+      force: true,
+      maxRetries: 3,
+      retryDelay: 50,
+    });
+  });
+
+  it("routes group message replies to the group id", async () => {
+    const event = {
+      type: "message",
+      message: { id: "1", type: "text", text: "hello" },
+      replyToken: "reply-token",
+      timestamp: Date.now(),
+      source: { type: "group", groupId: "group-1", userId: "user-1" },
+      mode: "active",
+      webhookEventId: "evt-1",
+      deliveryContext: { isRedelivery: false },
+    } as MessageEvent;
+
+    const context = await buildLineMessageContext({
+      event,
+      allMedia: [],
+      cfg,
+      account,
+    });
+
+    expect(context.ctxPayload.OriginatingTo).toBe("line:group:group-1");
+    expect(context.ctxPayload.To).toBe("line:group:group-1");
+  });
+
+  it("routes group postback replies to the group id", async () => {
+    const event = {
+      type: "postback",
+      postback: { data: "action=select" },
+      replyToken: "reply-token",
+      timestamp: Date.now(),
+      source: { type: "group", groupId: "group-2", userId: "user-2" },
+      mode: "active",
+      webhookEventId: "evt-2",
+      deliveryContext: { isRedelivery: false },
+    } as PostbackEvent;
+
+    const context = await buildLinePostbackContext({
+      event,
+      cfg,
+      account,
+    });
+
+    expect(context?.ctxPayload.OriginatingTo).toBe("line:group:group-2");
+    expect(context?.ctxPayload.To).toBe("line:group:group-2");
+  });
+});