chore: import upstream snapshot with attribution

server/utils/middleware/validWorkspace.js

@@ -0,0 +1,53 @@
+const { Workspace } = require("../../models/workspace");
+const { WorkspaceThread } = require("../../models/workspaceThread");
+const { userFromSession, multiUserMode } = require("../http");
+
+// Will pre-validate and set the workspace for a request if the slug is provided in the URL path.
+async function validWorkspaceSlug(request, response, next) {
+  const { slug } = request.params;
+  const user = await userFromSession(request, response);
+  const workspace = multiUserMode(response)
+    ? await Workspace.getWithUser(user, { slug })
+    : await Workspace.get({ slug });
+
+  if (!workspace) {
+    response.status(404).send("Workspace does not exist.");
+    return;
+  }
+
+  response.locals.workspace = workspace;
+  next();
+}
+
+// Will pre-validate and set the workspace AND a thread for a request if the slugs are provided in the URL path.
+async function validWorkspaceAndThreadSlug(request, response, next) {
+  const { slug, threadSlug } = request.params;
+  const user = await userFromSession(request, response);
+  const workspace = multiUserMode(response)
+    ? await Workspace.getWithUser(user, { slug })
+    : await Workspace.get({ slug });
+
+  if (!workspace) {
+    response.status(404).send("Workspace does not exist.");
+    return;
+  }
+
+  const thread = await WorkspaceThread.get({
+    slug: threadSlug,
+    user_id: user?.id || null,
+    workspace_id: workspace.id,
+  });
+  if (!thread) {
+    response.status(404).send("Workspace thread does not exist.");
+    return;
+  }
+
+  response.locals.workspace = workspace;
+  response.locals.thread = thread;
+  next();
+}
+
+module.exports = {
+  validWorkspaceSlug,
+  validWorkspaceAndThreadSlug,
+};