tutu/src/masto/toot.ts

import { cache } from "@solidjs/router";
import type { mastodon } from "masto";
import { createRenderEffect, createResource, type Accessor } from "solid-js";

const CUSTOM_EMOJI_REGEX = /:(\S+):/g;

/**
 * Resolve the custom emojis in string to HTML.
 */
export function resolveCustomEmoji(
  content: string,
  emojis: mastodon.v1.CustomEmoji[],
) {
  return content.replace(CUSTOM_EMOJI_REGEX, (original, shortcode: string) => {
    const emoji = emojis.find((x) => x.shortcode === shortcode);
    if (!emoji) {
      return original;
    }
    return `<img src="${emoji.url}" class="custom-emoji" alt="${shortcode}"/>`;
  });
}

export function appliedCustomEmoji(
  target: { innerHTML: string },
  content: string,
  emojis?: mastodon.v1.CustomEmoji[],
) {
  createRenderEffect(() => {
    const result = emojis ? resolveCustomEmoji(content, emojis) : content;
    target.innerHTML = result;
  });
}

export function hasCustomEmoji(s: string) {
  return CUSTOM_EMOJI_REGEX.test(s);
}