EntryPage

tcmts.share.EntryPage · #uvaeoqkc · term · runs on the server

is an async component

One history entry: what it's for (its message, if it has one), when and how it was made, and what it changed, each definition with its lines (as a contribution's changes show), what only re-hashed folded away.

import { keyPath } from "#codebase/tcmts/cli/diff";
import { shortHash } from "#codebase/tcmts/core/hash";
import {
  at, ChangeBox, codeHref, contributionHref, DiffMode, EntryBadges, entryChanges, entrySummary, Fold, Frame,
  MoreChanges, shareNow, Trail,
} from "#codebase/tcmts/share";
import { entryTitle } from "#codebase/tcmts/store";

export async function EntryPage({ hash: asked }: { hash: string }) {
  const s = shareNow();
  if (!s.signedIn) return <Frame tab="history" title="Sign in" children={null} />;
  // (a hash's start will do, as `tcm history` shows it, `#` or not)
  const prefixed = s.cb.store.causal(asked)
    ? []
    : s.cb.store.causalsWithPrefix(asked.replace(/^#/, ""));
  const hash = prefixed.length === 1 ? prefixed[0]! : asked;
  const c = s.cb.store.causal(hash);
  if (!c)
    return (
      <Frame tab="history" title="Not found">
        <div className="empty">
          {prefixed.length > 1
            ? `${asked} starts ${prefixed.length} history entries' hashes: give more of it.`
            : "No such history entry."}
        </div>
      </Frame>
    );
  const e = entrySummary(s, hash);
  const changes = s.cache.atHead(s.cb, `entry ${hash}`, () => entryChanges(s, hash));
  const d = changes?.diff;
  // (the first twenty changes come with the page; a big merge's others as they're scrolled to)
  const first = 20;
  const items = changes?.items ?? [];
  const contribution = s.cb.store.contributions().find((x) => x.mergedAs === hash);
  // (a message's lines after its first: what the title says, said at more length)
  const body = c.message?.split("\n").slice(1).join("\n").trim();
  return (
    <Frame tab="history" title={entryTitle(c)}>
      <div className="narrow">
        <div className="crumbs">
          <Trail items={[{ label: "History", href: at("/history") }, { label: shortHash(hash) }]} />
        </div>
        <h2 className="title">{entryTitle(c)}</h2>
        {body && <p style={{ whiteSpace: "pre-wrap" }}>{body}</p>}
        {c.message && <div className="muted">{c.command}</div>}
        <div className="facts">
          <span className="hash">{shortHash(hash)}</span>
          <span>{new Date(c.ts).toISOString().replace("T", " ").slice(0, 16)}</span>
          {c.parents.map((p) => (
            <span key={p}>
              after{" "}
              <a className="hash" href={at(`/history/${p}`)}>
                {shortHash(p)}
              </a>
            </span>
          ))}
          {contribution && (
            <a href={contributionHref(contribution.id)}>contribution #{contribution.id}</a>
          )}
          {items.some((i) => i.lines.length) && (
            <span className="right">
              <DiffMode />
            </span>
          )}
        </div>
        <div className="badges" style={{ marginBottom: 16 }}>
          <EntryBadges e={e} />
        </div>
        {items.slice(0, first).map((i) => (
          <ChangeBox key={i.path} item={i} />
        ))}
        {items.length > first && <MoreChanges hash={hash} from={first} total={items.length} />}
        {d && d.propagated.length > 0 && (
          <div className="box">
            <Fold
              head={
                <>
                  <span className="badge b-prop">re-hashed</span>
                  <span className="muted">{d.propagated.length}: their code is the same</span>
                </>
              }
            >
              {d.propagated.slice(0, 100).map((x) => (
                <div className="drow full" key={x.path}>
                  <span />
                  <a className="mono" href={codeHref(keyPath(x.path))}>
                    {keyPath(x.path)}
                  </a>
                  <span />
                </div>
              ))}
              {d.propagated.length > 100 && (
                <div className="drow full">
                  <span />
                  <span className="muted">and {d.propagated.length - 100} more</span>
                </div>
              )}
            </Fold>
          </div>
        )}
      </div>
    </Frame>
  );
}

uses

used by