takeone-youtube-clone/resources/views/videos/partials/description-box.blade.php

{{--
    Tabbed description + insights box.
    Expects: $video (Video model)
    Optionally accepts: $descriptionSlot — raw HTML to show in the About tab body
--}}
@php
    $isVideoOwner  = Auth::check() && Auth::id() === $video->user_id;
    $renderedDescription = \App\Support\HtmlSanitizer::render($video->description ?? '');
    $hasDesc       = $renderedDescription !== '' || isset($descriptionSlot);
    $showBox       = $hasDesc || $isVideoOwner;
@endphp
@if ($showBox)
<style>
/* ── Description box ─────────────────────────────────── */
.vdb-wrap { background:var(--bg-secondary); border-radius:12px; margin-top:12px; overflow:hidden; border:1px solid var(--border-color); }
.vdb-tabs { display:flex; border-bottom:1px solid var(--border-color); padding:0 4px; }
.vdb-tab { background:none; border:none; color:var(--text-secondary); font-size:13px; font-weight:600; padding:0 16px; height:44px; cursor:pointer; position:relative; transition:color .15s; white-space:nowrap; display:flex; align-items:center; gap:6px; }
.vdb-tab:hover { color:var(--text-primary); }
.vdb-tab.active { color:var(--text-primary); }
.vdb-tab.active::after { content:''; position:absolute; bottom:0; left:0; right:0; height:2px; background:#ef4444; border-radius:2px 2px 0 0; }
.vdb-panel { display:none; padding:14px 16px 16px; }
.vdb-panel.active { display:block; }
.vdb-meta { font-size:13px; font-weight:600; color:var(--text-secondary); margin-bottom:10px; display:flex; gap:10px; flex-wrap:wrap; }
.vdb-desc-text { font-size:14px; line-height:1.6; color:var(--text-primary); word-break:break-word; }
.vdb-desc-text p { margin:0 0 8px; }
.vdb-desc-text p:last-child { margin-bottom:0; }
.vdb-desc-text h2 { font-size:19px; font-weight:700; margin:6px 0 8px; }
.vdb-desc-text h3 { font-size:16px; font-weight:700; margin:6px 0 6px; }
.vdb-desc-text ul, .vdb-desc-text ol { margin:0 0 8px; padding-left:22px; }
.vdb-desc-text blockquote { margin:0 0 8px; padding-left:12px; border-left:3px solid var(--border-color); color:var(--text-secondary); }
.vdb-desc-text a { color:#3ea6ff; }
.vdb-desc-text a.action-btn { display:inline-flex; margin:4px 6px 4px 0; color:inherit; text-decoration:none; vertical-align:middle; }
.vdb-desc-text.vdb-clamp { max-height:130px; overflow:hidden; -webkit-mask-image:linear-gradient(180deg,#000 70%,transparent); mask-image:linear-gradient(180deg,#000 70%,transparent); }
.vdb-desc-text.vdb-clamp.vdb-expanded { max-height:none; -webkit-mask-image:none; mask-image:none; }
.vdb-show-more { display:flex; align-items:center; justify-content:center; gap:6px; margin:12px auto 0; background:var(--bg-secondary); border:1px solid var(--border-color); color:var(--text-primary); font-weight:700; font-size:13px; cursor:pointer; padding:7px 16px; border-radius:18px; transition:background .15s ease, border-color .15s ease; }
.vdb-show-more:hover { background:var(--bg-hover, rgba(127,127,127,.12)); }
.vdb-show-more i { font-size:14px; transition:transform .2s ease; }
.vdb-show-more.expanded i { transform:rotate(180deg); }
</style>

<div class="vdb-wrap" id="vdbWrap">
    <div class="vdb-tabs">
        <button class="vdb-tab active" data-panel="vdb-about" onclick="switchVdbTab('vdb-about',this)">
            <i class="bi bi-card-text"></i> About
        </button>
        @if($isVideoOwner)
        <button class="vdb-tab" data-panel="vdb-insights" onclick="switchVdbTab('vdb-insights',this)">
            <i class="bi bi-bar-chart-line-fill"></i> Insights
        </button>
        @endif
    </div>

    <div class="vdb-panel active" id="vdb-about">
        <div class="vdb-meta">
            <span><i class="bi bi-eye" style="margin-right:4px;"></i>{{ number_format($video->view_count) }} views</span>
            <span>•</span>
            <span>{{ $video->created_at->format('M d, Y') }}</span>
            @if($video->duration)<span>•</span><span><i class="bi bi-clock" style="margin-right:4px;"></i>{{ $video->formatted_duration }}</span>@endif
        </div>
        @if(isset($descriptionSlot))
            {!! $descriptionSlot !!}
        @elseif($renderedDescription !== '')
            <div id="vdbDescShort" class="vdb-desc-text vdb-clamp">{!! $renderedDescription !!}</div>
            <button id="vdbShowMore" class="vdb-show-more" style="display:none;" onclick="toggleVdbDesc(this)"><span>Show more</span> <i class="bi bi-chevron-down"></i></button>
        @else
            <p style="font-size:13px;color:var(--text-secondary);margin:0;">No description added.</p>
        @endif
    </div>

    @if($isVideoOwner)
    <x-video-insights :video="$video" />
    @endif
</div>

<script>
// Remember which tab the user opened so SPA navigation between videos keeps it active.
window._vdbActiveTab = window._vdbActiveTab || 'vdb-about';

// Scroll back up to the video player on every SPA video-to-video swap.
// On mobile the window is locked (see CLAUDE.md mobile scroll model) and `.yt-main`
// (id="main") is the real scroll container, so we scroll that instead.
window._spaScrollToVideo = window._spaScrollToVideo || function () {
    const main = document.getElementById('main');
    if (window.innerWidth <= 768 && main) {
        main.scrollTo({ top: 0, behavior: 'smooth' });
    } else {
        window.scrollTo({ top: 0, behavior: 'smooth' });
    }
};

// ── Tab switching ──────────────────────────────────────
function switchVdbTab(panelId, btn) {
    window._vdbActiveTab = panelId;
    document.querySelectorAll('.vdb-tab').forEach(b => b.classList.remove('active'));
    document.querySelectorAll('.vdb-panel').forEach(p => p.classList.remove('active'));
    btn.classList.add('active');
    document.getElementById(panelId).classList.add('active');
    // About just became visible — re-measure now that its panel is laid out, since
    // a measurement taken while it was display:none would have read 0.
    if (panelId === 'vdb-about' && window._vdbScheduleOverflowCheck) window._vdbScheduleOverflowCheck();
    if (panelId === 'vdb-insights') {
        const panel      = document.getElementById('vdb-insights');
        const currentUrl = panel && panel.dataset.insightsBase;
        if (currentUrl && currentUrl !== window._insLoadedUrl) loadInsights();
    }
}

// Re-apply the remembered tab after an SPA swap replaces #vdbWrap's contents.
// If the remembered tab doesn't exist on the new video (e.g. Insights when the
// viewer isn't the owner), fall back to About so nothing is left blank.
function _vdbApplyActiveTab() {
    const wrap = document.getElementById('vdbWrap');
    if (!wrap) return;
    let target = window._vdbActiveTab || 'vdb-about';
    let btn = wrap.querySelector('.vdb-tab[data-panel="' + target + '"]');
    if (!btn) { target = 'vdb-about'; btn = wrap.querySelector('.vdb-tab[data-panel="vdb-about"]'); }
    if (!btn) return;
    wrap.querySelectorAll('.vdb-tab').forEach(b => b.classList.remove('active'));
    wrap.querySelectorAll('.vdb-panel').forEach(p => p.classList.remove('active'));
    btn.classList.add('active');
    const panel = document.getElementById(target);
    if (panel) panel.classList.add('active');
    if (target === 'vdb-insights') {
        const ip = document.getElementById('vdb-insights');
        const currentUrl = ip && ip.dataset.insightsBase;
        if (currentUrl && currentUrl !== window._insLoadedUrl && typeof loadInsights === 'function') loadInsights();
    }
}
// Observe #vdbWrap so the active tab is re-applied whenever the SPA layer
// rewrites its innerHTML during a video-to-video transition.
(function _vdbWatchSwaps() {
    const wrap = document.getElementById('vdbWrap');
    if (!wrap || wrap._vdbTabObserver) return;
    const obs = new MutationObserver(() => {
        _vdbApplyActiveTab();
        // The swap replaced the description markup — re-evaluate the "Show more"
        // button once layout/fonts/images settle. Central here so every SPA swap
        // path is covered, not just the ones that remember to call it themselves.
        if (window._vdbScheduleOverflowCheck) window._vdbScheduleOverflowCheck();
    });
    obs.observe(wrap, { childList: true, subtree: false });
    wrap._vdbTabObserver = obs;
})();
function toggleVdbDesc(btn) {
    const d = document.getElementById('vdbDescShort');
    if (!d) return;
    const expanded = d.classList.toggle('vdb-expanded');
    btn.classList.toggle('expanded', expanded);
    const label = btn.querySelector('span');
    if (label) label.textContent = expanded ? 'Show less' : 'Show more';
}
// Reveal "Show more" only when the description overflows the clamp. Compare the
// natural content height to the clamp limit (130px) rather than clientHeight,
// which is unreliable right after a content swap.
function _vdbCheckOverflow() {
    const d = document.getElementById('vdbDescShort'), b = document.getElementById('vdbShowMore');
    if (!d || !b) return;
    if (d.classList.contains('vdb-expanded')) { b.style.display = 'flex'; return; }
    // If the About panel isn't laid out yet (e.g. Insights tab active, or mid-swap),
    // scrollHeight reads 0 — don't hide the button on a bogus zero measurement.
    if (d.scrollHeight === 0) return;
    b.style.display = (d.scrollHeight > 138) ? 'flex' : 'none';
}
// A single measurement right after an SPA swap is unreliable: web-fonts, images
// inside the description, and panel layout can all change the height a beat later,
// each of which flips whether the clamp overflows. Re-check at every settling point.
window._vdbScheduleOverflowCheck = window._vdbScheduleOverflowCheck || function () {
    requestAnimationFrame(_vdbCheckOverflow);
    setTimeout(_vdbCheckOverflow, 120);
    setTimeout(_vdbCheckOverflow, 400);
    if (document.fonts && document.fonts.ready) document.fonts.ready.then(_vdbCheckOverflow);
    const d = document.getElementById('vdbDescShort');
    if (d) d.querySelectorAll('img').forEach(function (img) {
        if (!img.complete) img.addEventListener('load', _vdbCheckOverflow, { once: true });
    });
};
document.addEventListener('DOMContentLoaded', window._vdbScheduleOverflowCheck);
window.addEventListener('load', window._vdbScheduleOverflowCheck);
</script>
@endif