1
import { redux } from "@cocalc/frontend/app-framework";
2
import { field_cmp } from "@cocalc/util/misc";
3

4
export async function getRecentRegions(project_id): Promise<string[]> {
5
  const computeServers = redux
6
    .getProjectStore(project_id)
7
    .get("compute_servers");
8
  if (computeServers == null) {
9
    return [];
10
  }
11
  const v: { last_edited: Date; region: string }[] = [];
12
  for (const [, x] of computeServers) {
13
    const last_edited = x.get("last_edited");
14
    if (last_edited == null) continue;
15
    const region = x.getIn(["configuration", "region"]);
16
    if (region == null) continue;
17
    v.push({ last_edited, region });
18
  }
19
  const regions = v
20
    .sort(field_cmp("last_edited"))
21
    .map(({ region }) => region)
22
    .reverse();
23
  const w: string[] = [];
24
  for (const region of regions) {
25
    if (!w.includes(region)) {
26
      w.push(region);
27
    }
28
  }
29
  return w;
30
}
31

32