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/*
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 *  This file is part of CoCalc: Copyright © 2020 Sagemath, Inc.
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 *  License: MS-RSL – see LICENSE.md for details
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 */
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import { SortedPatchList } from "./sorted-patch-list";
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import { Patch } from "./types";
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export interface HistoryEntry {
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  time_utc: Date;
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  account_id: string;
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  patch?: any[];
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  patch_length?: number;
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}
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export interface HistoryExportOptions {
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  patches?: boolean;
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  patch_lengths?: boolean; // length of each patch (some measure of amount changed)
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}
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export function export_history(
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  account_ids: string[],
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  patch_list: SortedPatchList,
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  options: HistoryExportOptions,
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): HistoryEntry[] {
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  const patches: Patch[] = patch_list.export();
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  const entries: HistoryEntry[] = [];
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  for (const x of patches) {
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    const time_utc = new Date(x.time);
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    let account_id = account_ids[x.user_id];
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    if (account_id == null) {
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      account_id = "unknown"; // should never happen...
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    }
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    const entry: HistoryEntry = { time_utc, account_id };
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    if (options.patches) {
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      entry.patch = x.patch;
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    }
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    if (options.patch_lengths) {
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      entry.patch_length = JSON.stringify(x.patch).length;
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    }
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    entries.push(entry);
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  }
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  return entries;
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}
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