BRETT/app/components/CommentContent.vue

<script setup lang="ts">
import { mentionParts } from '~~/shared/utils/mentions'
import { getYoutubeId, youtubeEmbedUrl } from '~~/shared/utils/youtube'
import { getTwitchTarget, serializeTwitchTarget, twitchEmbedUrl } from '~~/shared/utils/twitch'

interface Part {
  type: 'text' | 'link' | 'youtube' | 'twitch' | 'image'
  text: string
  href?: string
  videoId?: string
  twitchTarget?: string
}

const props = defineProps<{
  content: string
  compact?: boolean
}>()

// Twitch-Embeds brauchen den Hostname als parent-Parameter
const requestHost = useRequestURL().hostname

const URL_RE = /https?:\/\/[^\s<>"']+/g
const TRAILING_PUNCT = /[.,;:!?)\]]+$/

const IMAGE_EXT = /\.(avif|bmp|gif|jpe?g|png|svg|webp)$/i

function isImageUrl(href: string): boolean {
  try {
    return IMAGE_EXT.test(new URL(href).pathname)
  }
  catch {
    return false
  }
}

function hostnameFor(part: Part): string {
  const raw = part.href ?? part.text
  try {
    return new URL(raw).hostname.replace(/^www\./, '')
  }
  catch {
    return raw
  }
}

const { data: mentionUsers } = useMentionUsers()
const parts = computed<Part[]>(() => {
  const result: Part[] = []
  let last = 0
  for (const match of props.content.matchAll(URL_RE)) {
    const raw = match[0]
    const href = raw.replace(TRAILING_PUNCT, '')
    const trailing = raw.slice(href.length)
    if (match.index > last) {
      result.push({ type: 'text', text: props.content.slice(last, match.index) })
    }
    const videoId = getYoutubeId(href)
    const twitchTarget = videoId ? null : serializeTwitchTarget(getTwitchTarget(href))
    if (videoId) {
      result.push({ type: 'youtube', text: href, videoId })
    }
    else if (twitchTarget) {
      result.push({ type: 'twitch', text: href, twitchTarget })
    }
    else if (isImageUrl(href)) {
      result.push({ type: 'image', text: href, href })
    }
    else {
      result.push({ type: 'link', text: href, href })
    }
    if (trailing) {
      result.push({ type: 'text', text: trailing })
    }
    last = match.index + raw.length
  }
  if (last < props.content.length) {
    result.push({ type: 'text', text: props.content.slice(last) })
  }
  return result
})
</script>

<template>
  <div class="whitespace-pre-wrap break-words text-sm">
    <template v-for="(part, index) in parts" :key="index">
      <template v-if="part.type === 'text'">
        <template v-for="(segment, segmentIndex) in mentionParts(part.text, mentionUsers)" :key="segmentIndex">
          <UserHoverCard v-if="segment.user" :user-id="segment.user.id" :user-name="segment.user.name" :user-color="segment.user.color">
            <NuxtLink :to="`/user/${segment.user.id}`" class="rounded-sm bg-accent px-0.5 font-medium text-accent-foreground hover:underline" @click.stop>{{ segment.text }}</NuxtLink>
          </UserHoverCard>
          <template v-else>{{ segment.text }}</template>
        </template>
      </template>
      <!-- Kompakt-Modus (Sidebar): Icon + Hostname statt Embed/Card -->
      <span
        v-else-if="compact && part.type !== 'text'"
        class="mx-0.5 inline-flex items-center gap-1 rounded-sm bg-muted px-1.5 py-0.5 align-middle text-xs text-muted-foreground"
      >
        <Icon v-if="part.type === 'youtube'" name="simple-icons:youtube" class="size-3.5" />
        <Icon v-else-if="part.type === 'twitch'" name="simple-icons:twitch" class="size-3.5" />
        <Icon name="ph:image-fill" v-else-if="part.type === 'image'" class="size-3.5" />
        <Icon name="ph:link-fill" v-else class="size-3.5" />
        {{ hostnameFor(part) }}
      </span>
      <template v-else-if="!compact">
        <LinkPreviewCard
          v-if="part.type === 'link'"
          :url="part.href!"
        />
        <div v-else-if="part.type === 'youtube'" class="mt-2 aspect-video overflow-hidden rounded-md">
          <iframe
            :src="youtubeEmbedUrl(part.videoId!)"
            :title="part.text"
            loading="lazy"
            allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture"
            allowfullscreen
            class="h-full w-full"
          />
        </div>
        <div v-else-if="part.type === 'twitch'" class="mt-2 aspect-video overflow-hidden rounded-md">
          <iframe
            :src="twitchEmbedUrl(part.twitchTarget!, requestHost) ?? ''"
            :title="part.text"
            loading="lazy"
            allowfullscreen
            class="h-full w-full"
          />
        </div>
        <a
          v-else-if="part.type === 'image'"
          :href="part.href"
          target="_blank"
          rel="noopener noreferrer"
          class="mt-2 block"
        >
          <NuxtImg
            :src="part.href"
            :alt="part.text"
            loading="lazy"
            class="max-h-60 rounded-md"
          />
        </a>
        <template v-else>{{ part.text }}</template>
      </template>
      <template v-else>{{ part.text }}</template>
    </template>
  </div>
</template>