[ie/facebook:ads] Add extractor (#8870)

Closes #8083
Authored by: kclauhk

yt_dlp/extractor/facebook.py

@@ -20,6 +20,7 @@ from ..utils import (
     get_element_by_id,
     get_first,
     int_or_none,
+    join_nonempty,
     js_to_json,
     merge_dicts,
     parse_count,
@@ -907,3 +908,114 @@ class FacebookReelIE(InfoExtractor):
         video_id = self._match_id(url)
         return self.url_result(
             f'https://m.facebook.com/watch/?v={video_id}&_rdr', FacebookIE, video_id)
+
+
+class FacebookAdsIE(InfoExtractor):
+    _VALID_URL = r'https?://(?:[\w-]+\.)?facebook\.com/ads/library/?\?(?:[^#]+&)?id=(?P<id>\d+)'
+    IE_NAME = 'facebook:ads'
+
+    _TESTS = [{
+        'url': 'https://www.facebook.com/ads/library/?id=899206155126718',
+        'info_dict': {
+            'id': '899206155126718',
+            'ext': 'mp4',
+            'title': 'video by Kandao',
+            'uploader': 'Kandao',
+            'uploader_id': '774114102743284',
+            'uploader_url': r're:^https?://.*',
+            'timestamp': 1702548330,
+            'thumbnail': r're:^https?://.*',
+            'upload_date': '20231214',
+            'like_count': int,
+        }
+    }, {
+        'url': 'https://www.facebook.com/ads/library/?id=893637265423481',
+        'info_dict': {
+            'id': '893637265423481',
+            'title': 'Jusqu\u2019\u00e0 -25% sur une s\u00e9lection de vins p\u00e9tillants italiens ',
+            'uploader': 'Eataly Paris Marais',
+            'uploader_id': '2086668958314152',
+            'uploader_url': r're:^https?://.*',
+            'timestamp': 1703571529,
+            'upload_date': '20231226',
+            'like_count': int,
+        },
+        'playlist_count': 3,
+    }, {
+        'url': 'https://es-la.facebook.com/ads/library/?id=901230958115569',
+        'only_matching': True,
+    }, {
+        'url': 'https://m.facebook.com/ads/library/?id=901230958115569',
+        'only_matching': True,
+    }]
+
+    _FORMATS_MAP = {
+        'watermarked_video_sd_url': ('sd-wmk', 'SD, watermarked'),
+        'video_sd_url': ('sd', None),
+        'watermarked_video_hd_url': ('hd-wmk', 'HD, watermarked'),
+        'video_hd_url': ('hd', None),
+    }
+
+    def _extract_formats(self, video_dict):
+        formats = []
+        for format_key, format_url in traverse_obj(video_dict, (
+            {dict.items}, lambda _, v: v[0] in self._FORMATS_MAP and url_or_none(v[1])
+        )):
+            formats.append({
+                'format_id': self._FORMATS_MAP[format_key][0],
+                'format_note': self._FORMATS_MAP[format_key][1],
+                'url': format_url,
+                'ext': 'mp4',
+                'quality': qualities(tuple(self._FORMATS_MAP))(format_key),
+            })
+        return formats
+
+    def _real_extract(self, url):
+        video_id = self._match_id(url)
+        webpage = self._download_webpage(url, video_id)
+
+        post_data = [self._parse_json(j, video_id, fatal=False)
+                     for j in re.findall(r's\.handle\(({.*})\);requireLazy\(', webpage)]
+        data = traverse_obj(post_data, (
+            ..., 'require', ..., ..., ..., 'props', 'deeplinkAdCard', 'snapshot', {dict}), get_all=False)
+        if not data:
+            raise ExtractorError('Unable to extract ad data')
+
+        title = data.get('title')
+        if not title or title == '{{product.name}}':
+            title = join_nonempty('display_format', 'page_name', delim=' by ', from_dict=data)
+
+        info_dict = traverse_obj(data, {
+            'description': ('link_description', {str}, {lambda x: x if x != '{{product.description}}' else None}),
+            'uploader': ('page_name', {str}),
+            'uploader_id': ('page_id', {str_or_none}),
+            'uploader_url': ('page_profile_uri', {url_or_none}),
+            'timestamp': ('creation_time', {int_or_none}),
+            'like_count': ('page_like_count', {int_or_none}),
+        })
+
+        entries = []
+        for idx, entry in enumerate(traverse_obj(
+            data, (('videos', 'cards'), lambda _, v: any([url_or_none(v[f]) for f in self._FORMATS_MAP]))), 1
+        ):
+            entries.append({
+                'id': f'{video_id}_{idx}',
+                'title': entry.get('title') or title,
+                'description': entry.get('link_description') or info_dict.get('description'),
+                'thumbnail': url_or_none(entry.get('video_preview_image_url')),
+                'formats': self._extract_formats(entry),
+            })
+
+        if len(entries) == 1:
+            info_dict.update(entries[0])
+
+        elif len(entries) > 1:
+            info_dict.update({
+                'title': entries[0]['title'],
+                'entries': entries,
+                '_type': 'playlist',
+            })
+
+        info_dict['id'] = video_id
+
+        return info_dict