tutu/src/timelines/TootThread.tsx

import type { mastodon } from "masto";
import { Show, createResource, createSignal, type Component } from "solid-js";
import CompactToot from "./CompactToot";
import { useTimeSource } from "../platform/timesrc";
import RegularToot from "./RegularToot";
import cardStyle from "../material/cards.module.css";
import { css } from "solid-styled";

type TootThreadProps = {
  status: mastodon.v1.Status;
  client: mastodon.rest.Client;
  expanded?: 0 | 1 | 2;

  onBoost?(client: mastodon.rest.Client, status: mastodon.v1.Status): void;
  onBookmark?(client: mastodon.rest.Client, status: mastodon.v1.Status): void;
  onExpandChange?(level: 0 | 1 | 2): void;
};

const TootThread: Component<TootThreadProps> = (props) => {
  const status = () => props.status;
  const now = useTimeSource();
  const expanded = () => props.expanded ?? 0;

  const [inReplyTo] = createResource(
    () => [props.client, status().inReplyToId || null] as const,
    async ([client, replyToId]) => {
      if (!(client && replyToId)) return null;
      return await client.v1.statuses.$select(replyToId).fetch();
    },
  );

  const boost = (status: mastodon.v1.Status) => {
    props.onBoost?.(props.client, status);
  };

  const bookmark = (status: mastodon.v1.Status) => {
    props.onBookmark?.(props.client, status);
  };

  css`
    article {
      transition:
        margin 90ms var(--tutu-anim-curve-sharp),
        var(--tutu-transition-shadow);
      user-select: none;
      cursor: pointer;
    }

    .thread-line {
      position: relative;
      &::before {
        content: "";
        position: absolute;
        left: 36px;
        top: 16px;
        bottom: 0;
        background-color: var(--tutu-color-secondary);
        width: 2px;
        display: block;
      }
    }

    .expanded {
      margin-block: 20px;
      box-shadow: var(--tutu-shadow-e9);
    }
  `;

  const nextExpandLevel = [1, 2, 2] as const;

  return (
    <article
      classList={{ "thread-line": !!inReplyTo(), expanded: expanded() > 0 }}
      onClick={() => props.onExpandChange?.(nextExpandLevel[expanded()])}
    >
      <Show when={inReplyTo()}>
        <CompactToot
          status={inReplyTo()!}
          now={now()}
          class={[cardStyle.card, cardStyle.manualMargin].join(" ")}
        />
      </Show>
      <RegularToot
        status={status()}
        class={cardStyle.card}
        actionable={expanded() > 0}
        onBookmark={(s) => bookmark(s)}
        onRetoot={(s) => boost(s)}
      />
    </article>
  );
};

export default TootThread;