util.ts

/*
 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
 *  License: MS-RSL – see LICENSE.md for details
 */
import { SizeType } from "antd/lib/config-provider/SizeContext";
import { Map } from "immutable";
import { IntlShape } from "react-intl";

import {
  TypedMap,
  useEffect,
  useState,
  useWindowDimensions,
} from "@cocalc/frontend/app-framework";
import { IconName } from "@cocalc/frontend/components/icon";
import { labels } from "@cocalc/frontend/i18n";
import { KUCALC_COCALC_COM } from "@cocalc/util/db-schema/site-defaults";
import {
  cmp,
  defaults,
  merge,
  required,
  search_match,
  search_split,
  separate_file_extension,
} from "@cocalc/util/misc";
import { ProjectsStore } from "../projects/store";
import { UserMap } from "../todo-types";
import { StudentsMap } from "./store";
import { AssignmentCopyStep } from "./types";

// Pure functions used in the course manager
export function STEPS(peer: boolean): AssignmentCopyStep[] {
  if (peer) {
    return [
      "assignment",
      "collect",
      "peer_assignment",
      "peer_collect",
      "return_graded",
    ];
  } else {
    return ["assignment", "collect", "return_graded"];
  }
}

export function previous_step(
  step: AssignmentCopyStep,
  peer: boolean,
): AssignmentCopyStep {
  let prev: AssignmentCopyStep | undefined;
  for (const s of STEPS(peer)) {
    if (step === s) {
      if (prev === undefined) break;
      return prev;
    }
    prev = s;
  }
  throw Error(`BUG! previous_step('${step}, ${peer}')`);
}

export function step_direction(step: AssignmentCopyStep): "to" | "from" {
  switch (step) {
    case "assignment":
      return "to";
    case "collect":
      return "from";
    case "return_graded":
      return "to";
    case "peer_assignment":
      return "to";
    case "peer_collect":
      return "from";
    default:
      throw Error(`BUG! step_direction('${step}')`);
  }
}

export function step_verb(step: AssignmentCopyStep) {
  switch (step) {
    case "assignment":
      return "assign";
    case "collect":
      return "collect";
    case "return_graded":
      return "return";
    case "peer_assignment":
      return "assign";
    case "peer_collect":
      return "collect";
    default:
      throw Error(`BUG! step_verb('${step}')`);
  }
}

export function step_ready(step: AssignmentCopyStep, n) {
  switch (step) {
    case "assignment":
      return "";
    case "collect":
      if (n > 1) {
        return " who have already received it";
      } else {
        return " who has already received it";
      }
    case "return_graded":
      return " whose work you have graded";
    case "peer_assignment":
      return " for peer grading";
    case "peer_collect":
      return " who should have peer graded it";
  }
}

// Takes a student immutable.Map with key 'student_id'
// Returns a list of students `x` shaped like:
// {
//    first_name    : string
//    last_name     : string
//    last_active   : integer
//    hosting       : string
//    email_address : string
// }
export function parse_students(
  student_map: StudentsMap,
  user_map: UserMap,
  redux,
  intl: IntlShape,
) {
  const v = immutable_to_list(student_map, "student_id");
  for (const x of v) {
    if (x.account_id != null) {
      const user = user_map.get(x.account_id);
      if (x.first_name == null) {
        x.first_name = user == null ? "" : user.get("first_name", "");
      }
      if (x.last_name == null) {
        x.last_name = user == null ? "" : user.get("last_name", "");
      }
      if (x.project_id != null) {
        const projects_store = redux.getStore("projects");
        if (projects_store != null) {
          const last_active = projects_store.get_last_active(x.project_id);
          if (last_active != null) {
            x.last_active = last_active.get(x.account_id);
          }
        }
      }
    }
    const { description, state } = projectStatus(x.project_id, redux, intl);
    x.hosting = description + state;

    if (x.first_name == null) {
      x.first_name = "";
    }
    if (x.last_name == null) {
      x.last_name = "";
    }
    if (x.last_active == null) {
      x.last_active = 0;
    }
    if (x.email_address == null) {
      x.email_address = "";
    }
  }
  return v;
}

// Transforms Iterable<K, M<i, m>> to [M<i + primary_key, m + K>] where primary_key maps to K
// Dunno if either of these is readable...
// Turns Map(Keys -> Objects{...}) into [Objects{primary_key : Key, ...}]
// TODO: Type return array better
export function immutable_to_list(x: undefined): undefined;
export function immutable_to_list<T, P>(
  x: Map<string, T>,
  primary_key: P,
): T extends TypedMap<infer S>
  ? S[]
  : T extends Map<string, infer S>
  ? S[]
  : any;
export function immutable_to_list(x: any, primary_key?): any {
  if (x == null || x == undefined) {
    return;
  }
  const v: any[] = [];
  x.map((val, key) => v.push(merge(val.toJS(), { [primary_key]: key })));
  return v;
}

// Returns a list of matched objects and the number of objects
// which were in the original list but omitted in the returned list
export function compute_match_list(opts: {
  list: any[];
  search_key: string;
  search: string;
}) {
  opts = defaults(opts, {
    list: required, // list of objects<M>
    search_key: required, // M.search_key property to match over
    search: required, // matches to M.search_key
  });
  let { list, search, search_key } = opts;
  if (!search) {
    // why are you even calling this..
    return { list, num_omitted: 0 };
  }

  const words = search_split(search);
  const matches = (x) =>
    search_match(x[search_key]?.toLowerCase?.() ?? "", words);
  const n = list.length;
  list = list.filter(matches);
  const num_omitted = n - list.length;
  return { list, num_omitted };
}

// Returns
// `list` partitioned into [not deleted, deleted]
// where each partition is sorted based on the given `compare_function`
// deleted is not included by default
export function order_list<T extends { deleted: boolean }>(opts: {
  list: T[];
  compare_function: (a: T, b: T) => number;
  reverse: boolean;
  include_deleted: boolean;
}) {
  opts = defaults(opts, {
    list: required,
    compare_function: required,
    reverse: false,
    include_deleted: false,
  });
  let { list, compare_function, include_deleted } = opts;

  const x = list.filter((x) => x.deleted);
  const sorted_deleted = x.sort(compare_function);

  const y = list.filter((x) => !x.deleted);
  list = y.sort(compare_function);

  if (opts.reverse) {
    list.reverse();
  }

  if (include_deleted) {
    list = list.concat(sorted_deleted);
  }

  return { list, deleted: x, num_deleted: sorted_deleted.length };
}

const cmp_strings = (a, b, field) => {
  return cmp(a[field]?.toLowerCase() ?? "", b[field]?.toLowerCase() ?? "");
};

// first sort by domain, then address at that domain... since there will be many students
// at same domain, and '[email protected]' > '[email protected]' > '[email protected]' is true but not helpful
const cmp_email = (a, b) => {
  const v = a.split("@");
  const w = b.split("@");
  const c = cmp(v[1], w[1]);
  if (c) {
    return c;
  }
  return cmp(v[0], w[0]);
};

const sort_on_string_field = (field, field2) => (a, b) => {
  const c =
    field == "email_address"
      ? cmp_email(a[field], b[field])
      : cmp_strings(a, b, field);
  return c != 0 ? c : cmp_strings(a, b, field2);
};

const sort_on_numerical_field = (field, field2) => (a, b) => {
  const c = cmp((a[field] ?? 0) * -1, (b[field] ?? 0) * -1);
  return c != 0 ? c : cmp_strings(a, b, field2);
};

type StudentField =
  | "email"
  | "first_name"
  | "last_name"
  | "last_active"
  | "hosting";

export function pick_student_sorter<T extends { column_name: StudentField }>(
  sort: T,
) {
  switch (sort.column_name) {
    case "email":
      return sort_on_string_field("email_address", "last_name");
    case "first_name":
      return sort_on_string_field("first_name", "last_name");
    case "last_name":
      return sort_on_string_field("last_name", "first_name");
    case "last_active":
      return sort_on_numerical_field("last_active", "last_name");
    case "hosting":
      return sort_on_string_field("hosting", "email_address");
  }
}

export function assignment_identifier(
  assignment_id: string,
  student_id: string,
): string {
  return assignment_id + student_id;
}

export function autograded_filename(filename: string): string {
  const { name, ext } = separate_file_extension(filename);
  return name + "_autograded." + ext;
}

interface ProjectStatus {
  description: string;
  icon: IconName;
  state: string;
  tip?: string;
}

export function projectStatus(
  project_id: string | undefined,
  redux,
  intl: IntlShape,
): ProjectStatus {
  if (!project_id) {
    return { description: "(not created)", icon: "hourglass-half", state: "" };
  }
  const store = redux.getStore("projects");
  const state = ` (${store.get_state(project_id)})`;
  const kucalc = redux.getStore("customize").get("kucalc");
  if (kucalc === KUCALC_COCALC_COM) {
    return projectStatusCoCalcCom({ project_id, state, store, intl });
  } else {
    const tip = intl.formatMessage({
      id: "course.util.project_status.ready",
      defaultMessage: "Project exists and is ready.",
    });
    return {
      icon: "exclamation-triangle",
      description: intl.formatMessage(labels.ready),
      tip,
      state,
    };
  }
}

function projectStatusCoCalcCom({
  project_id,
  state,
  store,
  intl,
}: {
  project_id: string;
  state: string;
  store: ProjectsStore;
  intl: IntlShape;
}): ProjectStatus {
  const upgrades = store.get_total_project_quotas(project_id);
  if (upgrades == null) {
    // user opening the course, but isn't a collaborator on
    // this student project for some reason.  This will get fixed
    // when configure all projects runs.
    const description = intl.formatMessage({
      id: "course.util.status-cocalc-com.project_not_available",
      defaultMessage: "(not available)",
    });
    return {
      description,
      icon: "question-circle",
      state: "",
    };
  }

  if (upgrades.member_host) {
    return {
      icon: "check",
      description: "Members-only hosting",
      tip: "Projects is on a members-only server, which is much more robust and has priority support.",
      state,
    };
  }
  const licenses = store.get_site_license_ids(project_id);
  if (licenses.length > 0) {
    const description = intl.formatMessage({
      id: "course.util.status-cocalc-com.licensed.description",
      defaultMessage: "Licensed",
    });
    const tip = intl.formatMessage({
      id: "course.util.status-cocalc-com.licensed.tooltip",
      defaultMessage:
        "Project is properly licensed and should work well. Thank you!",
    });
    return { description, icon: "check", state, tip };
  } else {
    const description = intl.formatMessage({
      id: "course.util.status-cocalc-com.free.description",
      defaultMessage: "Free Trial",
    });
    const tip = intl.formatMessage({
      id: "course.util.status-cocalc-com.free.tooltip",
      defaultMessage: `Project is a trial project hosted on a free server,
      so it may be overloaded and will be rebooted frequently.
      Please upgrade in course configuration.`,
    });
    return {
      description,
      icon: "exclamation-triangle",
      state,
      tip,
    };
  }
}

// the list of assignments, in particular with peer grading, has a large number of buttons
// in a single row. We mitigate this by rendering the buttons smaller if the screen is narrower.
export function useButtonSize(): SizeType {
  const [size, setSize] = useState<SizeType>("small");
  const { width } = useWindowDimensions();
  useEffect(() => {
    const next = width < 1024 ? "small" : "middle";
    if (next != size) {
      setSize(next);
    }
  });
  return size;
}