[teachable] Add support for teachable based platform sites (closes #5451, closes #18150, closes #18272)

1 files changed, 259 insertions, 0 deletions

diff --git a/youtube_dl/extractor/teachable.py b/youtube_dl/extractor/teachable.py
new file mode 100644
index 000000000..a0c46b2e6
--- /dev/null
+++ b/youtube_dl/extractor/teachable.py
@@ -0,0 +1,259 @@
+from __future__ import unicode_literals
+
+import re
+
+from .common import InfoExtractor
+from .wistia import WistiaIE
+from ..compat import compat_str
+from ..utils import (
+    clean_html,
+    ExtractorError,
+    get_element_by_class,
+    urlencode_postdata,
+    urljoin,
+)
+
+
+class TeachableBaseIE(InfoExtractor):
+    _NETRC_MACHINE = 'teachable'
+    _URL_PREFIX = 'teachable:'
+
+    _SITES = {
+        # Only notable ones here
+        'upskillcourses.com': 'upskill',
+        'academy.gns3.com': 'gns3',
+        'academyhacker.com': 'academyhacker',
+        'stackskills.com': 'stackskills',
+        'market.saleshacker.com': 'saleshacker',
+        'learnability.org': 'learnability',
+        'edurila.com': 'edurila',
+    }
+
+    _VALID_URL_SUB_TUPLE = (_URL_PREFIX, '|'.join(re.escape(site) for site in _SITES.keys()))
+
+    def _real_initialize(self):
+        self._logged_in = False
+
+    def _login(self, site):
+        if self._logged_in:
+            return
+
+        username, password = self._get_login_info(
+            netrc_machine=self._SITES.get(site, site))
+        if username is None:
+            return
+
+        login_page, urlh = self._download_webpage_handle(
+            'https://%s/sign_in' % site, None,
+            'Downloading %s login page' % site)
+
+        login_url = compat_str(urlh.geturl())
+
+        login_form = self._hidden_inputs(login_page)
+
+        login_form.update({
+            'user[email]': username,
+            'user[password]': password,
+        })
+
+        post_url = self._search_regex(
+            r'<form[^>]+action=(["\'])(?P<url>(?:(?!\1).)+)\1', login_page,
+            'post url', default=login_url, group='url')
+
+        if not post_url.startswith('http'):
+            post_url = urljoin(login_url, post_url)
+
+        response = self._download_webpage(
+            post_url, None, 'Logging in to %s' % site,
+            data=urlencode_postdata(login_form),
+            headers={
+                'Content-Type': 'application/x-www-form-urlencoded',
+                'Referer': login_url,
+            })
+
+        if '>I accept the new Privacy Policy<' in response:
+            raise ExtractorError(
+                'Unable to login: %s asks you to accept new Privacy Policy. '
+                'Go to https://%s/ and accept.' % (site, site), expected=True)
+
+        # Successful login
+        if any(re.search(p, response) for p in (
+                r'class=["\']user-signout',
+                r'<a[^>]+\bhref=["\']/sign_out',
+                r'>\s*Log out\s*<')):
+            self._logged_in = True
+            return
+
+        message = get_element_by_class('alert', response)
+        if message is not None:
+            raise ExtractorError(
+                'Unable to login: %s' % clean_html(message), expected=True)
+
+        raise ExtractorError('Unable to log in')
+
+
+class TeachableIE(TeachableBaseIE):
+    _VALID_URL = r'''(?x)
+                    (?:
+                        %shttps?://(?P<site_t>[^/]+)|
+                        https?://(?:www\.)?(?P<site>%s)
+                    )
+                    /courses/[^/]+/lectures/(?P<id>\d+)
+                    ''' % TeachableBaseIE._VALID_URL_SUB_TUPLE
+
+    _TESTS = [{
+        'url': 'http://upskillcourses.com/courses/essential-web-developer-course/lectures/1747100',
+        'info_dict': {
+            'id': 'uzw6zw58or',
+            'ext': 'mp4',
+            'title': 'Welcome to the Course!',
+            'description': 'md5:65edb0affa582974de4625b9cdea1107',
+            'duration': 138.763,
+            'timestamp': 1479846621,
+            'upload_date': '20161122',
+        },
+        'params': {
+            'skip_download': True,
+        },
+    }, {
+        'url': 'http://upskillcourses.com/courses/119763/lectures/1747100',
+        'only_matching': True,
+    }, {
+        'url': 'https://academy.gns3.com/courses/423415/lectures/6885939',
+        'only_matching': True,
+    }, {
+        'url': 'teachable:https://upskillcourses.com/courses/essential-web-developer-course/lectures/1747100',
+        'only_matching': True,
+    }]
+
+    @staticmethod
+    def _is_teachable(webpage):
+        return 'teachableTracker.linker:autoLink' in webpage and re.search(
+            r'<link[^>]+href=["\']https?://process\.fs\.teachablecdn\.com',
+            webpage)
+
+    @staticmethod
+    def _extract_url(webpage, source_url):
+        if not TeachableIE._is_teachable(webpage):
+            print('NOT TEACHABLE')
+            return
+        if re.match(r'https?://[^/]+/(?:courses|p)', source_url):
+            return '%s%s' % (TeachableBaseIE._URL_PREFIX, source_url)
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        site = mobj.group('site') or mobj.group('site_t')
+        video_id = mobj.group('id')
+
+        self._login(site)
+
+        prefixed = url.startswith(self._URL_PREFIX)
+        if prefixed:
+            url = url[len(self._URL_PREFIX):]
+
+        webpage = self._download_webpage(url, video_id)
+
+        wistia_url = WistiaIE._extract_url(webpage)
+        if not wistia_url:
+            if any(re.search(p, webpage) for p in (
+                    r'class=["\']lecture-contents-locked',
+                    r'>\s*Lecture contents locked',
+                    r'id=["\']lecture-locked')):
+                self.raise_login_required('Lecture contents locked')
+
+        title = self._og_search_title(webpage, default=None)
+
+        return {
+            '_type': 'url_transparent',
+            'url': wistia_url,
+            'ie_key': WistiaIE.ie_key(),
+            'title': title,
+        }
+
+
+class TeachableCourseIE(TeachableBaseIE):
+    _VALID_URL = r'''(?x)
+                        (?:
+                            %shttps?://(?P<site_t>[^/]+)|
+                            https?://(?:www\.)?(?P<site>%s)
+                        )
+                        /(?:courses|p)/(?:enrolled/)?(?P<id>[^/?#&]+)
+                    ''' % TeachableBaseIE._VALID_URL_SUB_TUPLE
+    _TESTS = [{
+        'url': 'http://upskillcourses.com/courses/essential-web-developer-course/',
+        'info_dict': {
+            'id': 'essential-web-developer-course',
+            'title': 'The Essential Web Developer Course (Free)',
+        },
+        'playlist_count': 192,
+    }, {
+        'url': 'http://upskillcourses.com/courses/119763/',
+        'only_matching': True,
+    }, {
+        'url': 'http://upskillcourses.com/courses/enrolled/119763',
+        'only_matching': True,
+    }, {
+        'url': 'https://academy.gns3.com/courses/enrolled/423415',
+        'only_matching': True,
+    }, {
+        'url': 'teachable:https://learn.vrdev.school/p/gear-vr-developer-mini',
+        'only_matching': True,
+    }, {
+        'url': 'teachable:https://filmsimplified.com/p/davinci-resolve-15-crash-course',
+        'only_matching': True,
+    }]
+
+    @classmethod
+    def suitable(cls, url):
+        return False if TeachableIE.suitable(url) else super(
+            TeachableCourseIE, cls).suitable(url)
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        site = mobj.group('site') or mobj.group('site_t')
+        course_id = mobj.group('id')
+
+        self._login(site)
+
+        prefixed = url.startswith(self._URL_PREFIX)
+        if prefixed:
+            prefix = self._URL_PREFIX
+            url = url[len(prefix):]
+
+        webpage = self._download_webpage(url, course_id)
+
+        url_base = 'https://%s/' % site
+
+        entries = []
+
+        for mobj in re.finditer(
+                r'(?s)(?P<li><li[^>]+class=(["\'])(?:(?!\2).)*?section-item[^>]+>.+?</li>)',
+                webpage):
+            li = mobj.group('li')
+            if 'fa-youtube-play' not in li:
+                continue
+            lecture_url = self._search_regex(
+                r'<a[^>]+href=(["\'])(?P<url>(?:(?!\1).)+)\1', li,
+                'lecture url', default=None, group='url')
+            if not lecture_url:
+                continue
+            lecture_id = self._search_regex(
+                r'/lectures/(\d+)', lecture_url, 'lecture id', default=None)
+            title = self._html_search_regex(
+                r'<span[^>]+class=["\']lecture-name[^>]+>([^<]+)', li,
+                'title', default=None)
+            entry_url = urljoin(url_base, lecture_url)
+            if prefixed:
+                entry_url = self._URL_PREFIX + entry_url
+            entries.append(
+                self.url_result(
+                    entry_url,
+                    ie=TeachableIE.ie_key(), video_id=lecture_id,
+                    video_title=clean_html(title)))
+
+        course_title = self._html_search_regex(
+            (r'(?s)<img[^>]+class=["\']course-image[^>]+>\s*<h\d>(.+?)</h',
+             r'(?s)<h\d[^>]+class=["\']course-title[^>]+>(.+?)</h'),
+            webpage, 'course title', fatal=False)
+
+        return self.playlist_result(entries, course_id, course_title)