refactor: reorganize src structure

src/server/db.test.ts

@@ -0,0 +1,138 @@
+import { afterEach, describe, expect, test } from "bun:test";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import { createDrawingStore } from "./db";
+
+const cleanup: string[] = [];
+
+afterEach(() => {
+  while (cleanup.length > 0) {
+    const dir = cleanup.pop();
+    if (dir) {
+      rmSync(dir, { recursive: true, force: true });
+    }
+  }
+});
+
+function createTempStore() {
+  const dir = mkdtempSync(join(tmpdir(), "excali-"));
+  cleanup.push(dir);
+  return createDrawingStore(join(dir, "test.sqlite"));
+}
+
+describe("drawing store", () => {
+  test("creates, updates, lists, and deletes drawings", () => {
+    const store = createTempStore();
+    const created = store.createDrawing();
+
+    expect(created.title).toBe("Untitled");
+    expect(created.revision).toBe(0);
+    expect(created.scene.appState.theme).toBe("dark");
+    expect(store.listDrawings()).toHaveLength(1);
+    expect(store.listDrawings()[0]?.revision).toBe(0);
+
+    const updated = store.updateDrawing(created.id, {
+      title: "Flow",
+      scene: {
+        elements: [{ id: "one" }],
+        appState: { gridSize: 20 },
+        files: {},
+      },
+    });
+
+    expect(updated.ok).toBe(true);
+    expect(updated.ok ? updated.drawing.title : null).toBe("Flow");
+    expect(updated.ok ? updated.drawing.revision : null).toBe(1);
+    expect(updated.ok ? updated.drawing.scene.elements : []).toHaveLength(1);
+
+    const removed = store.deleteDrawing(created.id);
+    expect(removed.deleted).toBe(true);
+    expect(store.listDrawings()).toHaveLength(1);
+    expect(removed.next?.id).not.toBe(created.id);
+  });
+
+  test("rejects stale expected revisions without overwriting the scene", () => {
+    const store = createTempStore();
+    const created = store.createDrawing();
+
+    const first = store.updateDrawing(created.id, {
+      expectedRevision: 0,
+      scene: {
+        elements: [{ id: "first" }],
+        appState: {},
+        files: {},
+      },
+    });
+
+    expect(first.ok).toBe(true);
+
+    const stale = store.updateDrawing(created.id, {
+      expectedRevision: 0,
+      scene: {
+        elements: [{ id: "stale" }],
+        appState: {},
+        files: {},
+      },
+    });
+
+    expect(stale.ok).toBe(false);
+    expect(stale.ok ? null : stale.reason).toBe("conflict");
+    expect(store.getDrawing(created.id)?.revision).toBe(1);
+    expect(store.getDrawing(created.id)?.scene.elements).toEqual([{ id: "first" }]);
+  });
+
+  test("keeps the revision unchanged when the scene is already stored", () => {
+    const store = createTempStore();
+    const created = store.createDrawing();
+    const scene = {
+      elements: [{ id: "same" }],
+      appState: {},
+      files: {},
+    };
+
+    const first = store.updateDrawing(created.id, { scene });
+    expect(first.ok ? first.drawing.revision : null).toBe(1);
+
+    const repeated = store.updateDrawing(created.id, { scene });
+    expect(repeated.ok).toBe(true);
+    expect(repeated.ok ? repeated.drawing.revision : null).toBe(1);
+    expect(store.getDrawing(created.id)?.revision).toBe(1);
+  });
+
+  test("accepts stale expected revisions when the scene is already stored", () => {
+    const store = createTempStore();
+    const created = store.createDrawing();
+    const scene = {
+      elements: [{ id: "same" }],
+      appState: {},
+      files: {},
+    };
+
+    const first = store.updateDrawing(created.id, { expectedRevision: 0, scene });
+    expect(first.ok ? first.drawing.revision : null).toBe(1);
+
+    const repeated = store.updateDrawing(created.id, { expectedRevision: 0, scene });
+    expect(repeated.ok).toBe(true);
+    expect(repeated.ok ? repeated.drawing.revision : null).toBe(1);
+    expect(store.getDrawing(created.id)?.scene.elements).toEqual([{ id: "same" }]);
+  });
+
+  test("increments the revision when the title changes but the scene does not", () => {
+    const store = createTempStore();
+    const created = store.createDrawing();
+    const scene = {
+      elements: [{ id: "same" }],
+      appState: {},
+      files: {},
+    };
+
+    const first = store.updateDrawing(created.id, { expectedRevision: 0, scene });
+    expect(first.ok ? first.drawing.revision : null).toBe(1);
+
+    const renamed = store.updateDrawing(created.id, { expectedRevision: 1, title: "Renamed", scene });
+    expect(renamed.ok).toBe(true);
+    expect(renamed.ok ? renamed.drawing.title : null).toBe("Renamed");
+    expect(renamed.ok ? renamed.drawing.revision : null).toBe(2);
+  });
+});