import { join } from "path";
import { Alpine } from "./alpine.js";

export type Mount = {
  path: string;
  username: string;
};
function getPersistPath(mount: Mount): string {
  return join("/persist", mount.path);
}

export class Persist {
  private alpine: Alpine;
  private mounts: Mount[] = [];
  constructor(alpine: Alpine) {
    this.alpine = alpine;
  }

  async addMount(mount: Mount) {
    await this.alpine.symlink(getPersistPath(mount), mount.path);
    this.mounts.push(mount);
    await this.write();
  }
  async write() {
    await this.alpine.mkdirP("/persist");
    let script = "#!/bin/sh -e\n";
    script += this.mounts
      .flatMap((m) => [
        `mkdir -p '${getPersistPath(m)}'`,
        `chown '${m.username}:${m.username}' '${getPersistPath(m)}'`,
        `chmod 700 '${m.path}'`,
      ])
      .join("\n");
    await this.alpine.writeExecutable(
      // runit/scripts/03-filesystems.sh
      "/usr/local/sbin/set-persist-permissions",
      script
    );
  }
}