Add AI translation for comments and video descriptions

Comments get a Translate button that calls the active LLM provider in Admin → AI
settings. Each commenter shows a small country flag inferred from their
video_views + profile_visits history (falls back to users.nationality); that
inferred country drives the language hint passed to the LLM so Portuguese
"Linda, linda, linda" translates to "Beautiful" instead of pass-through.

Description boxes get a line-paired translation grid: a shared Translate button
flips #vdbDescSplit into a two-column CSS grid where every source line sits
next to its translation on the same row. Backend splits by newline and asks
the LLM for a JSON map keyed by index so counts always match.

LlmLyricsService now has translate() + translateLines() with echo-retry (if the
model returns the input unchanged while source != target, retry once with a
stronger directive) and keeps the Ollama model resident via keep_alive=1h.

Co-Authored-By: Claude Opus 4.7 (1M context) <[email protected]>
This commit is contained in:
ghassanandClaude Opus 4.7 committed 2026-10-02 12:18:20 +03:00
1 parent 20c8fdcdf3
commit 2d33e39b9b
8 files changed
+749 -22

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@@ -4,6 +4,12 @@
use App\Models\CommentLike;
$currentUserId = Auth::id() ?? 0;
$llmEnabled = app(\App\Services\LlmLyricsService::class)->isEnabled();
// Flag per commenter: most-frequent access country, falling back to the
// user's nationality. Batched so the comments list stays a single query.
$commenterIds = $video->comments()->pluck('user_id')->filter()->unique()->values()->all();
$commenterCountry = \App\Models\User::topCountriesFor($commenterIds);
$topComments = $video->comments()->whereNull('parent_id')->with('user', 'replies.user')->latest()->get();
$commentCount = $topComments->sum(fn($c) => 1 + $c->replies->count());
@@ -89,11 +95,16 @@
</a>
<div class="ytc-body-wrap">
<div class="ytc-meta">
@php $cFlag = $commenterCountry[$comment->user_id] ?? null; @endphp
@if($cFlag)<span class="ytc-flag fi fi-{{ strtolower($cFlag) }}" title="{{ $cFlag }}"></span>@endif
<a href="{{ $comment->user ? route('channel', $comment->user->channel) : '#' }}" class="ytc-author">{{ $comment->user->name ?? 'User' }}</a>
<span class="ytc-time">{{ ytcTime($comment->created_at) }}</span>
</div>
<div class="ytc-text _comment-body" data-_comment-enhanced="0">{{ $comment->body }}</div>
@if($llmEnabled)
<div class="ytc-translation" id="translation-{{ $comment->id }}" style="display:none"></div>
@endif
{{-- Edit form --}}
@if($isOwn)
@@ -120,6 +131,12 @@
@auth
<button class="ytc-reply-btn _comment-reply-trigger" data-comment-id="{{ $comment->id }}">Reply</button>
@endauth
@if($llmEnabled)
<button class="ytc-translate-btn _comment-translate-trigger" data-comment-id="{{ $comment->id }}" title="Translate this comment">
<svg viewBox="0 0 24 24"><path d="M12.87 15.07l-2.54-2.51.03-.03c1.74-1.94 2.98-4.17 3.71-6.53H17V4h-7V2H8v2H1v1.99h11.17C11.5 7.92 10.44 9.75 9 11.35 8.07 10.32 7.3 9.19 6.69 8h-2c.73 1.63 1.73 3.17 2.98 4.56l-5.09 5.02L4 19l5-5 3.11 3.11.76-2.04zM18.5 10h-2L12 22h2l1.12-3h4.75L21 22h2l-4.5-12zm-2.62 7l1.62-4.33L19.12 17h-3.24z"/></svg>
<span class="ytc-translate-label">Translate</span>
</button>
@endif
@if($isOwn)
<div class="ytc-more-wrap">
<button class="ytc-more-btn" title="More actions">
@@ -172,10 +189,15 @@
</a>
<div class="ytc-body-wrap">
<div class="ytc-meta">
@php $rFlag = $commenterCountry[$reply->user_id] ?? null; @endphp
@if($rFlag)<span class="ytc-flag fi fi-{{ strtolower($rFlag) }}" title="{{ $rFlag }}"></span>@endif
<a href="{{ $reply->user ? route('channel', $reply->user->channel) : '#' }}" class="ytc-author">{{ $reply->user->name ?? 'User' }}</a>
<span class="ytc-time">{{ ytcTime($reply->created_at) }}</span>
</div>
<div class="ytc-text _comment-body" data-_comment-enhanced="0">{{ $reply->body }}</div>
@if($llmEnabled)
<div class="ytc-translation" id="translation-{{ $reply->id }}" style="display:none"></div>
@endif
@if($replyIsOwn)
<div class="ytc-edit-form" id="commentEditWrap{{ $reply->id }}" style="display:none">
@@ -197,6 +219,12 @@
<button class="ytc-dislike-btn" data-id="{{ $reply->id }}" title="Dislike">
<svg viewBox="0 0 24 24"><path d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L10.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2zm4 0v12h4V3h-4z"/></svg>
</button>
@if($llmEnabled)
<button class="ytc-translate-btn _comment-translate-trigger" data-comment-id="{{ $reply->id }}" title="Translate this comment">
<svg viewBox="0 0 24 24"><path d="M12.87 15.07l-2.54-2.51.03-.03c1.74-1.94 2.98-4.17 3.71-6.53H17V4h-7V2H8v2H1v1.99h11.17C11.5 7.92 10.44 9.75 9 11.35 8.07 10.32 7.3 9.19 6.69 8h-2c.73 1.63 1.73 3.17 2.98 4.56l-5.09 5.02L4 19l5-5 3.11 3.11.76-2.04zM18.5 10h-2L12 22h2l1.12-3h4.75L21 22h2l-4.5-12zm-2.62 7l1.62-4.33L19.12 17h-3.24z"/></svg>
<span class="ytc-translate-label">Translate</span>
</button>
@endif
@if($replyIsOwn)
<div class="ytc-more-wrap">
<button class="ytc-more-btn">
@@ -498,6 +526,57 @@
}
.ytc-reply-btn:hover { background: rgba(255,255,255,.1); }
/* ── Translate ── */
.ytc-translate-btn {
display: inline-flex;
align-items: center;
gap: 6px;
background: none;
border: none;
color: var(--text-secondary);
font-size: 13px;
font-weight: 500;
cursor: pointer;
padding: 6px 10px;
border-radius: 18px;
transition: background .15s, color .15s;
font-family: inherit;
}
.ytc-translate-btn:hover { background: rgba(255,255,255,.1); color: var(--text-primary); }
.ytc-translate-btn svg { width: 16px; height: 16px; fill: currentColor; }
.ytc-translate-btn.loading { opacity: .6; cursor: wait; }
.ytc-translate-btn.active { color: #3ea6ff; }
.ytc-flag {
display: inline-block;
width: 18px;
height: 13px;
border-radius: 2px;
box-shadow: 0 0 0 1px rgba(255,255,255,.08);
vertical-align: middle;
transform: translateY(-1px);
flex-shrink: 0;
}
.ytc-translation {
margin-top: 6px;
padding: 10px 12px;
background: rgba(62,166,255,.08);
border-left: 2px solid #3ea6ff;
border-radius: 4px;
font-size: 14px;
line-height: 1.6;
color: var(--text-primary);
white-space: pre-wrap;
word-break: break-word;
}
.ytc-translation-meta {
display: block;
font-size: 11px;
color: var(--text-secondary);
margin-bottom: 4px;
text-transform: uppercase;
letter-spacing: .4px;
}
/* ── Three-dot menu ── */
.ytc-more-wrap {
position: relative;
@@ -695,9 +774,16 @@ const YTC = {
videoId: '{{ $video->getRouteKey() }}',
csrf: '{{ csrf_token() }}',
userId: {{ $currentUserId }},
llmEnabled: {{ $llmEnabled ? 'true' : 'false' }},
meCountry: @json($currentUserId && isset($commenterCountry[$currentUserId]) ? strtolower($commenterCountry[$currentUserId]) : null),
deleteId: null,
toastTimer: null,
};
const YTC_TRANSLATE_SVG = '<svg viewBox="0 0 24 24"><path d="M12.87 15.07l-2.54-2.51.03-.03c1.74-1.94 2.98-4.17 3.71-6.53H17V4h-7V2H8v2H1v1.99h11.17C11.5 7.92 10.44 9.75 9 11.35 8.07 10.32 7.3 9.19 6.69 8h-2c.73 1.63 1.73 3.17 2.98 4.56l-5.09 5.02L4 19l5-5 3.11 3.11.76-2.04zM18.5 10h-2L12 22h2l1.12-3h4.75L21 22h2l-4.5-12zm-2.62 7l1.62-4.33L19.12 17h-3.24z"/></svg>';
function targetLang() {
const l = (navigator.language || 'en').toLowerCase().split('-')[0];
return l || 'en';
}
// ── Helpers ──────────────────────────────────────────
function esc(s) {
@@ -904,8 +990,78 @@ document.getElementById('ytcList')?.addEventListener('click', e => {
// Dislike btn
const db = e.target.closest('.ytc-dislike-btn');
if (db) { e.stopPropagation(); toggleDislike(db); return; }
});
// Translate — bound at `document` level once, dispatches to the LATEST
// IIFE's handler via window.__ytcToggleTranslate. SPA video-to-video swaps
// replace #ytcSection and re-run this script; the new IIFE overwrites
// window.__ytcToggleTranslate so it keeps using fresh state (YTC.csrf etc.).
window.__ytcToggleTranslate = function (btn) { toggleTranslate(btn); };
if (!window.__ytcTranslateDelegated) {
window.__ytcTranslateDelegated = true;
document.addEventListener('click', e => {
const tb = e.target.closest('._comment-translate-trigger');
if (!tb) return;
e.stopPropagation();
if (typeof window.__ytcToggleTranslate === 'function') window.__ytcToggleTranslate(tb);
});
}
// ── Translate ─────────────────────────────────────────
async function toggleTranslate(btn) {
const id = btn.dataset.commentId;
const panel = document.getElementById('translation-' + id);
const label = btn.querySelector('.ytc-translate-label');
if (!panel) return;
// Toggle off if already shown.
if (panel.style.display !== 'none' && panel.dataset.loaded === '1') {
panel.style.display = 'none';
btn.classList.remove('active');
if (label) label.textContent = 'Translate';
return;
}
// Already loaded — just reveal.
if (panel.dataset.loaded === '1') {
panel.style.display = 'block';
btn.classList.add('active');
if (label) label.textContent = 'Show original';
return;
}
btn.classList.add('loading');
if (label) label.textContent = 'Translating…';
try {
const r = await fetch('/comments/' + id + '/translate', {
method: 'POST',
headers: { 'Content-Type': 'application/json', 'X-CSRF-TOKEN': YTC.csrf, 'Accept': 'application/json' },
body: JSON.stringify({ target: targetLang() })
});
const d = await r.json();
if (!r.ok || !d.success) throw new Error(d.error || 'Translation failed');
panel.innerHTML = '';
const meta = document.createElement('span');
meta.className = 'ytc-translation-meta';
meta.textContent = 'Translated → ' + (d.target || targetLang()).toUpperCase();
const body = document.createElement('div');
body.textContent = d.translated;
panel.appendChild(meta);
panel.appendChild(body);
panel.dataset.loaded = '1';
panel.style.display = 'block';
btn.classList.add('active');
if (label) label.textContent = 'Show original';
} catch (err) {
toast(err.message || 'Translation failed', 'error');
if (label) label.textContent = 'Translate';
} finally {
btn.classList.remove('loading');
}
}
// ── Reply form ────────────────────────────────────────
function toggleReplyForm(commentId) {
const form = document.getElementById('replyForm' + commentId);
@@ -970,10 +1126,12 @@ async function saveEdit(commentId) {
// ── Post comment ──────────────────────────────────────
async function postComment() {
if (postComment._busy) return; // guard against double-submit (fast dbl-click, Enter+click, duplicate listeners after SPA swap)
const ta = document.getElementById('ytcTextarea');
if (!ta) return;
const text = ta.value.trim();
if (!text) { toast('Write something first', 'error'); return; }
postComment._busy = true;
submitBtn.disabled = true;
submitBtn.textContent = 'Posting…';
try {
@@ -1000,6 +1158,7 @@ async function postComment() {
} catch (err) {
toast(err.message, 'error');
} finally {
postComment._busy = false;
submitBtn.disabled = false;
submitBtn.textContent = 'Comment';
}
@@ -1012,7 +1171,12 @@ async function postReply(vid, parentId) {
const text = input.value.trim();
if (!text) { toast('Write something first', 'error'); return; }
const btn = input.closest('.ytc-reply-form')?.querySelector('._comment-submit-reply-trigger');
if (btn) { btn.disabled = true; btn.textContent = 'Posting…'; }
if (btn) {
if (btn.dataset.busy === '1') return; // guard against double-submit
btn.dataset.busy = '1';
btn.disabled = true;
btn.textContent = 'Posting…';
}
try {
const r = await fetch('/videos/' + vid + '/comments', {
method: 'POST',
@@ -1035,7 +1199,7 @@ async function postReply(vid, parentId) {
} catch (err) {
toast(err.message, 'error');
} finally {
if (btn) { btn.disabled = false; btn.textContent = 'Reply'; }
if (btn) { btn.dataset.busy = ''; btn.disabled = false; btn.textContent = 'Reply'; }
}
}
@@ -1133,6 +1297,12 @@ function buildCommentEl(c, isReply) {
</div>` : '';
const replyBtn = YTC.userId ? `<button class="ytc-reply-btn _comment-reply-trigger" data-comment-id="${id}">Reply</button>` : '';
const translateBtn = YTC.llmEnabled ? `
<button class="ytc-translate-btn _comment-translate-trigger" data-comment-id="${id}" title="Translate this comment">
${YTC_TRANSLATE_SVG}<span class="ytc-translate-label">Translate</span>
</button>` : '';
const translationPanel = YTC.llmEnabled ? `<div class="ytc-translation" id="translation-${id}" style="display:none"></div>` : '';
const flagEl = YTC.meCountry ? `<span class="ytc-flag fi fi-${YTC.meCountry}"></span>` : '';
const div = document.createElement('div');
div.className = 'ytc-comment' + (isReply ? ' ytc-reply' : '');
@@ -1143,10 +1313,12 @@ function buildCommentEl(c, isReply) {
</a>
<div class="ytc-body-wrap">
<div class="ytc-meta">
${flagEl}
<span class="ytc-author">${name}</span>
<span class="ytc-time">${time}</span>
</div>
<div class="ytc-text _comment-body" data-_comment-enhanced="0">${body}</div>
${translationPanel}
${editForm}
<div class="ytc-actions">
<button class="ytc-like-btn" data-id="${id}" title="Like">
@@ -1157,6 +1329,7 @@ function buildCommentEl(c, isReply) {
<svg viewBox="0 0 24 24"><path d="M15 3H6c-.83 0-1.54.5-1.84 1.22l-3.02 7.05c-.09.23-.14.47-.14.73v2c0 1.1.9 2 2 2h6.31l-.95 4.57-.03.32c0 .41.17.79.44 1.06L10.83 23l6.59-6.59c.36-.36.58-.86.58-1.41V5c0-1.1-.9-2-2-2zm4 0v12h4V3h-4z"/></svg>
</button>
${replyBtn}
${translateBtn}
${moreMenu}
</div>
${replyForm}
@@ -7,7 +7,12 @@
$isVideoOwner = Auth::check() && Auth::id() === $video->user_id;
$renderedDescription = \App\Support\HtmlSanitizer::render($video->description ?? '');
$hasDesc = $renderedDescription !== '' || isset($descriptionSlot);
$showBox = $hasDesc || $isVideoOwner;
$llmEnabledVdb = $hasDesc && app(\App\Services\LlmLyricsService::class)->isEnabled();
// Optional pre-rendered block shown above the description inside the About
// panel. Only the `match` type passes it (the bout summary card); when it is
// unset every other type renders exactly as before.
$aboutPrepend = $aboutPrepend ?? null;
$showBox = $hasDesc || $isVideoOwner || $aboutPrepend !== null;
@endphp
@if ($showBox)
<style>
@@ -36,6 +41,27 @@
.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); }
.vdb-translate-btn { display:inline-flex; align-items:center; gap:6px; background:none; border:1px solid var(--border-color); color:var(--text-primary); font-size:12px; font-weight:600; padding:5px 12px; border-radius:16px; cursor:pointer; margin-top:10px; transition:background .15s, color .15s; font-family:inherit; }
.vdb-translate-btn:hover { background:rgba(255,255,255,.08); }
.vdb-translate-btn.loading { opacity:.6; cursor:wait; }
.vdb-translate-btn.active { color:#3ea6ff; border-color:rgba(62,166,255,.4); }
.vdb-translate-btn svg { width:14px; height:14px; fill:currentColor; }
.vdb-desc-split { display:block; }
/* Line-paired view: each row = one original line + its translation, aligned on
the same baseline so skimming across the divider stays easy. */
.vdb-desc-split.has-translation #vdbDescShort { display:none; }
.vdb-translation-grid { display:grid; grid-template-columns:1fr 1fr; column-gap:16px; row-gap:4px; font-size:14px; line-height:1.6; color:var(--text-primary); word-break:break-word; }
.vdb-translation-meta { grid-column:1 / -1; font-size:11px; color:var(--text-secondary); margin:0 0 4px; text-transform:uppercase; letter-spacing:.4px; }
.vdb-tr-row { display:contents; }
.vdb-tr-cell { padding:4px 0; white-space:pre-wrap; }
.vdb-tr-cell.vdb-tr-orig { padding-right:16px; border-right:1px solid var(--border-color); }
.vdb-tr-cell.vdb-tr-trans { padding-left:4px; }
.vdb-tr-cell.vdb-tr-empty { min-height:1em; }
@media (max-width:768px) {
.vdb-translation-grid { grid-template-columns:1fr; row-gap:2px; }
.vdb-tr-cell.vdb-tr-orig { padding:4px 0 2px; border-right:none; }
.vdb-tr-cell.vdb-tr-trans { padding:0 0 10px 0; color:#9ad1ff; border-bottom:1px dashed var(--border-color); }
}
</style>
<div class="vdb-wrap" id="vdbWrap">
@@ -51,6 +77,9 @@
</div>
<div class="vdb-panel active" id="vdb-about">
@if($aboutPrepend !== null)
{!! $aboutPrepend !!}
@endif
<div class="vdb-meta">
<span><i class="bi bi-eye" style="margin-right:4px;"></i>{{ number_format($video->view_count) }} views</span>
<span>•</span>
@@ -60,11 +89,21 @@
@if(isset($descriptionSlot))
{!! $descriptionSlot !!}
@elseif($renderedDescription !== '')
<div id="vdbDescShort" class="vdb-desc-text vdb-clamp">{!! $renderedDescription !!}</div>
<div id="vdbDescSplit" class="vdb-desc-split">
<div id="vdbDescShort" class="vdb-desc-text vdb-clamp">{!! $renderedDescription !!}</div>
</div>
<button id="vdbShowMore" class="vdb-show-more" style="display:none;" onclick="toggleVdbDesc(this)"><span>Show more</span> <i class="bi bi-chevron-down"></i></button>
@else
<p style="font-size:13px;color:var(--text-secondary);margin:0;">No description added.</p>
@endif
@if($llmEnabledVdb)
<button type="button" class="vdb-translate-btn" id="vdbTranslateBtn"
data-video-key="{{ $video->getRouteKey() }}"
data-csrf="{{ csrf_token() }}">
<svg viewBox="0 0 24 24"><path d="M12.87 15.07l-2.54-2.51.03-.03c1.74-1.94 2.98-4.17 3.71-6.53H17V4h-7V2H8v2H1v1.99h11.17C11.5 7.92 10.44 9.75 9 11.35 8.07 10.32 7.3 9.19 6.69 8h-2c.73 1.63 1.73 3.17 2.98 4.56l-5.09 5.02L4 19l5-5 3.11 3.11.76-2.04zM18.5 10h-2L12 22h2l1.12-3h4.75L21 22h2l-4.5-12zm-2.62 7l1.62-4.33L19.12 17h-3.24z"/></svg>
<span class="vdb-translate-label">Translate</span>
</button>
@endif
</div>
@if($isVideoOwner)
@@ -176,5 +215,92 @@ window._vdbScheduleOverflowCheck = window._vdbScheduleOverflowCheck || function
};
document.addEventListener('DOMContentLoaded', window._vdbScheduleOverflowCheck);
window.addEventListener('load', window._vdbScheduleOverflowCheck);
// ── Description translate ─────────────────────────────
// Lives on the About tab. Falls back to navigator.language for the target.
function _vdbTargetLang() {
return ((navigator.language || 'en').toLowerCase().split('-')[0]) || 'en';
}
window._vdbToggleTranslate = window._vdbToggleTranslate || async function (btn) {
const split = document.getElementById('vdbDescSplit');
const showMore = document.getElementById('vdbShowMore');
const label = btn.querySelector('.vdb-translate-label');
if (!split) return;
let grid = document.getElementById('vdbTranslationGrid');
const showTranslation = () => {
split.classList.add('has-translation');
if (grid) grid.style.display = 'grid';
btn.classList.add('active');
if (label) label.textContent = 'Show original';
if (showMore) showMore.style.display = 'none';
};
const hideTranslation = () => {
split.classList.remove('has-translation');
if (grid) grid.style.display = 'none';
btn.classList.remove('active');
if (label) label.textContent = 'Translate';
if (window._vdbScheduleOverflowCheck) window._vdbScheduleOverflowCheck();
};
if (grid && grid.dataset.loaded === '1') {
split.classList.contains('has-translation') ? hideTranslation() : showTranslation();
return;
}
btn.classList.add('loading');
if (label) label.textContent = 'Translating…';
try {
const r = await fetch('/videos/' + btn.dataset.videoKey + '/description/translate', {
method: 'POST',
headers: { 'Content-Type': 'application/json', 'X-CSRF-TOKEN': btn.dataset.csrf, 'Accept': 'application/json' },
body: JSON.stringify({ target: _vdbTargetLang() })
});
const d = await r.json();
if (!r.ok || !d.success) throw new Error(d.error || 'Translation failed');
const segs = Array.isArray(d.segments) ? d.segments : [];
if (!segs.length) throw new Error('Translation failed');
// Build the line-paired grid. Each original line and its translation are
// siblings in the same CSS grid, so a short line on one side still shares
// its row with its counterpart on the other side.
if (!grid) {
grid = document.createElement('div');
grid.id = 'vdbTranslationGrid';
grid.className = 'vdb-translation-grid';
split.appendChild(grid);
}
grid.innerHTML = '';
const meta = document.createElement('div');
meta.className = 'vdb-translation-meta';
meta.textContent = 'Translated → ' + (d.target || _vdbTargetLang()).toUpperCase();
grid.appendChild(meta);
segs.forEach(seg => {
const origText = (seg.original ?? '').toString();
const trText = (seg.translated ?? '').toString();
const o = document.createElement('div');
o.className = 'vdb-tr-cell vdb-tr-orig' + (origText.trim() === '' ? ' vdb-tr-empty' : '');
o.textContent = origText;
const t = document.createElement('div');
t.className = 'vdb-tr-cell vdb-tr-trans' + (trText.trim() === '' ? ' vdb-tr-empty' : '');
t.textContent = trText;
grid.appendChild(o);
grid.appendChild(t);
});
grid.dataset.loaded = '1';
showTranslation();
} catch (err) {
if (window.showToast) window.showToast(err.message || 'Translation failed', 'error');
if (label) label.textContent = 'Translate';
} finally {
btn.classList.remove('loading');
}
};
// Delegate so SPA swaps that re-insert #vdbWrap keep working.
document.addEventListener('click', function (e) {
const b = e.target.closest('#vdbTranslateBtn');
if (b) { e.preventDefault(); window._vdbToggleTranslate(b); }
});
</script>
@endif