feat: convert tmux monitoring into a plugin (B10)

src/backend/tests/utils/tmux-monitor-settings-migration.test.ts

@@ -0,0 +1,149 @@
+/**
+ * The tmux monitor host-column migration.
+ *
+ * An upgrade must be lossless: a host with the monitor on must keep it on
+ * once the ssh_data column is dropped. Running it twice must not duplicate
+ * or clobber what it moved.
+ */
+
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+interface HostRow {
+  id: number;
+  enable_tmux_monitor: boolean;
+}
+
+interface SettingsRow {
+  pluginId: string;
+  scope: string;
+  scopeId: string | null;
+  key: string;
+  value: string | null;
+}
+
+const hostRows: HostRow[] = [];
+const settingsRows: SettingsRow[] = [];
+
+const find = (
+  pluginId: string,
+  scope: string,
+  scopeId: string | null,
+  key: string,
+) =>
+  settingsRows.find(
+    (row) =>
+      row.pluginId === pluginId &&
+      row.scope === scope &&
+      row.scopeId === scopeId &&
+      row.key === key,
+  );
+
+const pluginSettingsRepository = {
+  get: async (
+    pluginId: string,
+    scope: string,
+    scopeId: string | null,
+    key: string,
+  ) => find(pluginId, scope, scopeId, key) ?? null,
+  set: async (
+    pluginId: string,
+    scope: string,
+    scopeId: string | null,
+    key: string,
+    value: string | null,
+  ) => {
+    const existing = find(pluginId, scope, scopeId, key);
+    if (existing) {
+      existing.value = value;
+      return;
+    }
+    settingsRows.push({ pluginId, scope, scopeId, key, value });
+  },
+};
+
+vi.mock("../../database/repositories/factory.js", () => ({
+  createCurrentPluginSettingsRepository: () => pluginSettingsRepository,
+}));
+
+vi.mock("../../database/db/index.js", () => ({
+  getDb: () => ({
+    all: async () => hostRows.filter((row) => row.enable_tmux_monitor),
+  }),
+}));
+
+const { runTmuxMonitorSettingsMigration } =
+  await import("../../utils/crypto-migration/tmux-monitor-settings-migration.js");
+
+function storedValue(hostId: number, key: string): unknown {
+  const row = settingsRows.find(
+    (entry) => entry.scopeId === String(hostId) && entry.key === key,
+  );
+  return row?.value === null || row?.value === undefined
+    ? undefined
+    : JSON.parse(row.value);
+}
+
+beforeEach(() => {
+  hostRows.length = 0;
+  settingsRows.length = 0;
+});
+
+describe("runTmuxMonitorSettingsMigration", () => {
+  it("moves a host's enabled switch into plugin settings", async () => {
+    hostRows.push({ id: 1, enable_tmux_monitor: true });
+
+    const result = await runTmuxMonitorSettingsMigration();
+
+    expect(result.moved).toBe(1);
+    expect(storedValue(1, "enableTmuxMonitor")).toBe(true);
+    expect(settingsRows.every((row) => row.pluginId === "tmux-monitor")).toBe(
+      true,
+    );
+    expect(settingsRows.every((row) => row.scope === "host")).toBe(true);
+  });
+
+  it("leaves a disabled host untouched", async () => {
+    hostRows.push({ id: 3, enable_tmux_monitor: false });
+
+    const result = await runTmuxMonitorSettingsMigration();
+
+    expect(result.moved).toBe(0);
+    expect(storedValue(3, "enableTmuxMonitor")).toBeUndefined();
+  });
+
+  it("does nothing on a fresh install", async () => {
+    const result = await runTmuxMonitorSettingsMigration();
+
+    expect(result.moved).toBe(0);
+    expect(settingsRows).toEqual([]);
+  });
+
+  it("is idempotent: a second run changes nothing", async () => {
+    hostRows.push({ id: 2, enable_tmux_monitor: true });
+
+    await runTmuxMonitorSettingsMigration();
+    const afterFirst = JSON.parse(JSON.stringify(settingsRows));
+
+    const second = await runTmuxMonitorSettingsMigration();
+
+    expect(second.moved).toBe(0);
+    expect(second.skipped).toBe(1);
+    expect(settingsRows).toEqual(afterFirst);
+  });
+
+  it("does not overwrite a value the plugin already saved", async () => {
+    hostRows.push({ id: 5, enable_tmux_monitor: true });
+    await pluginSettingsRepository.set(
+      "tmux-monitor",
+      "host",
+      "5",
+      "enableTmuxMonitor",
+      "false",
+    );
+
+    const result = await runTmuxMonitorSettingsMigration();
+
+    expect(result.skipped).toBe(1);
+    expect(storedValue(5, "enableTmuxMonitor")).toBe(false);
+  });
+});