Method getExtensionFromMedia

rev/rev.ts:402–413

(media: any)

		}
		return false;
	}

	private getExtensionFromMedia(media: any): string {
		if (media instanceof Api.MessageMediaDocument) {
			const doc = media.document as Api.Document;
			const fileName = this.getFileNameFromDocument(doc);
			// 保留 .gif.mp4 完整扩展名
			if (fileName && fileName.toLowerCase().endsWith('.gif.mp4')) {
				return '.gif.mp4';
			}
			return this.getExtensionFromMime(doc?.mimeType);
		}
		return '.jpg';
	}