Implement creator studio and upload updates

app/Services/Moderation/DuplicateDetectionService.php

@@ -0,0 +1,106 @@
+<?php
+
+namespace App\Services\Moderation;
+
+use App\Enums\ModerationContentType;
+use App\Models\Artwork;
+use App\Models\ArtworkComment;
+
+class DuplicateDetectionService
+{
+    public function campaignText(string $content): string
+    {
+        $text = mb_strtolower($content);
+        $text = preg_replace('/https?:\/\/\S+/iu', ' [link] ', $text);
+        $text = preg_replace('/www\.\S+/iu', ' [link] ', (string) $text);
+        $text = preg_replace('/[^\p{L}\p{N}\s\[\]]+/u', ' ', (string) $text);
+        $text = preg_replace('/\s+/u', ' ', trim((string) $text));
+
+        return (string) $text;
+    }
+
+    /**
+     * @param array<int, string> $domains
+     */
+    public function buildGroupKey(string $content, array $domains = []): string
+    {
+        $template = $this->campaignText($content);
+        $tokens = preg_split('/\s+/u', $template, -1, PREG_SPLIT_NO_EMPTY) ?: [];
+        $signature = implode(' ', array_slice($tokens, 0, 12));
+        $domainPart = implode('|', array_slice(array_values(array_unique($domains)), 0, 2));
+
+        return hash('sha256', $domainPart . '::' . $signature);
+    }
+
+    /**
+     * @param array<string, mixed> $context
+     * @param array<int, string> $domains
+     */
+    public function nearDuplicateCount(string $content, array $context = [], array $domains = []): int
+    {
+        $type = (string) ($context['content_type'] ?? '');
+        $contentId = (int) ($context['content_id'] ?? 0);
+        $artworkId = (int) ($context['artwork_id'] ?? 0);
+        $signature = $this->campaignText($content);
+        if ($signature === '') {
+            return 0;
+        }
+
+        $candidates = match ($type) {
+            ModerationContentType::ArtworkComment->value => ArtworkComment::query()
+                ->where('id', '!=', $contentId)
+                ->whereNull('deleted_at')
+                ->latest('id')
+                ->limit(80)
+                ->get(['id', 'artwork_id', 'raw_content', 'content']),
+            ModerationContentType::ArtworkDescription->value => Artwork::query()
+                ->where('id', '!=', $contentId)
+                ->whereNotNull('description')
+                ->latest('id')
+                ->limit(80)
+                ->get(['id', 'description']),
+            default => \collect(),
+        };
+
+        $matches = 0;
+
+        foreach ($candidates as $candidate) {
+            $candidateText = match ($type) {
+                ModerationContentType::ArtworkComment->value => (string) ($candidate->raw_content ?: $candidate->content),
+                ModerationContentType::ArtworkDescription->value => (string) ($candidate->description ?? ''),
+                default => '',
+            };
+
+            if ($candidateText === '') {
+                continue;
+            }
+
+            $candidateSignature = $this->campaignText($candidateText);
+            similar_text($signature, $candidateSignature, $similarity);
+
+            $sameArtworkPenalty = $artworkId > 0 && (int) ($candidate->artwork_id ?? $candidate->id ?? 0) === $artworkId ? 4 : 0;
+
+            if ($similarity >= (float) \app('config')->get('content_moderation.duplicate_detection.near_duplicate_similarity', 84) - $sameArtworkPenalty) {
+                $matches++;
+                continue;
+            }
+
+            if ($domains !== []) {
+                $topDomain = $domains[0] ?? null;
+                if ($topDomain !== null && str_contains(mb_strtolower($candidateText), mb_strtolower($topDomain))) {
+                    similar_text($this->stripLinks($signature), $this->stripLinks($candidateSignature), $linklessSimilarity);
+                    if ($linklessSimilarity >= 72) {
+                        $matches++;
+                    }
+                }
+            }
+        }
+
+        return $matches;
+    }
+
+    private function stripLinks(string $text): string
+    {
+        return trim(str_replace('[link]', '', $text));
+    }
+}