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fluxer_api/src/unfurler/resolvers/TenorResolver.ts

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+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import {selectOne} from 'css-select';
+import type {Document, Element, Text} from 'domhandler';
+import {parseDocument} from 'htmlparser2';
+import type {MessageEmbedResponse} from '~/channel/EmbedTypes';
+import {Logger} from '~/Logger';
+import {BaseResolver} from '~/unfurler/resolvers/BaseResolver';
+
+interface TenorJsonLd {
+	image?: {thumbnailUrl?: string};
+	video?: {contentUrl?: string};
+}
+
+export class TenorResolver extends BaseResolver {
+	match(url: URL, mimeType: string, _content: Uint8Array): boolean {
+		return mimeType.startsWith('text/html') && url.hostname === 'tenor.com';
+	}
+
+	async resolve(url: URL, content: Uint8Array, isNSFWAllowed: boolean = false): Promise<Array<MessageEmbedResponse>> {
+		const document = parseDocument(Buffer.from(content).toString('utf-8'));
+		const jsonLdContent = this.extractJsonLdContent(document);
+		if (!jsonLdContent) {
+			return [];
+		}
+		const {thumbnailURL, videoURL} = this.extractURLsFromJsonLd(jsonLdContent);
+		const thumbnail = thumbnailURL ? await this.resolveMediaURL(url, thumbnailURL, isNSFWAllowed) : undefined;
+		const video = videoURL ? await this.resolveMediaURL(url, videoURL, isNSFWAllowed) : undefined;
+		const embed: MessageEmbedResponse = {
+			type: 'gifv',
+			url: url.href,
+			provider: {name: 'Tenor', url: 'https://tenor.com'},
+			thumbnail: thumbnail ?? undefined,
+			video: video ?? undefined,
+		};
+		return [embed];
+	}
+
+	private extractJsonLdContent(document: Document): TenorJsonLd | null {
+		const scriptElement = selectOne('script.dynamic[type="application/ld+json"]', document) as Element | null;
+		if (scriptElement && scriptElement.children.length > 0) {
+			const scriptContentNode = scriptElement.children[0] as Text;
+			const scriptContent = scriptContentNode.data;
+			try {
+				return JSON.parse(scriptContent) as TenorJsonLd;
+			} catch (error) {
+				Logger.error({error}, 'Failed to parse JSON-LD content');
+			}
+		}
+		return null;
+	}
+
+	private extractURLsFromJsonLd(jsonLdContent: TenorJsonLd): {thumbnailURL?: string; videoURL?: string} {
+		const thumbnailUrl = jsonLdContent.image?.thumbnailUrl;
+		const videoUrl = jsonLdContent.video?.contentUrl;
+		return {thumbnailURL: thumbnailUrl, videoURL: videoUrl};
+	}
+}