From c701472fc99c90f6ef4fdf0f0169a342f2e9e892 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Sun, 7 Apr 2019 02:15:25 +0700
Subject: [PATCH] [platzi] Add extractor (closes #20562)

---
 youtube_dl/extractor/extractors.py |   4 +
 youtube_dl/extractor/platzi.py     | 217 +++++++++++++++++++++++++++++
 2 files changed, 221 insertions(+)
 create mode 100644 youtube_dl/extractor/platzi.py

diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index 01119f2bb..41ab36213 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -868,6 +868,10 @@ from .picarto import (
 from .piksel import PikselIE
 from .pinkbike import PinkbikeIE
 from .pladform import PladformIE
+from .platzi import (
+    PlatziIE,
+    PlatziCourseIE,
+)
 from .playfm import PlayFMIE
 from .playplustv import PlayPlusTVIE
 from .plays import PlaysTVIE
diff --git a/youtube_dl/extractor/platzi.py b/youtube_dl/extractor/platzi.py
new file mode 100644
index 000000000..557b2b5ad
--- /dev/null
+++ b/youtube_dl/extractor/platzi.py
@@ -0,0 +1,217 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+from .common import InfoExtractor
+from ..compat import (
+    compat_b64decode,
+    compat_str,
+)
+from ..utils import (
+    clean_html,
+    ExtractorError,
+    int_or_none,
+    str_or_none,
+    try_get,
+    url_or_none,
+    urlencode_postdata,
+    urljoin,
+)
+
+
+class PlatziIE(InfoExtractor):
+    _VALID_URL = r'''(?x)
+                    https?://
+                        (?:
+                            platzi\.com/clases|           # es version
+                            courses\.platzi\.com/classes  # en version
+                        )/[^/]+/(?P<id>\d+)-[^/?\#&]+
+                    '''
+    _LOGIN_URL = 'https://platzi.com/login/'
+    _NETRC_MACHINE = 'platzi'
+
+    _TESTS = [{
+        'url': 'https://platzi.com/clases/1311-next-js/12074-creando-nuestra-primera-pagina/',
+        'md5': '8f56448241005b561c10f11a595b37e3',
+        'info_dict': {
+            'id': '12074',
+            'ext': 'mp4',
+            'title': 'Creando nuestra primera página',
+            'description': 'md5:4c866e45034fc76412fbf6e60ae008bc',
+            'duration': 420,
+        },
+        'skip': 'Requires platzi account credentials',
+    }, {
+        'url': 'https://courses.platzi.com/classes/1367-communication-codestream/13430-background/',
+        'info_dict': {
+            'id': '13430',
+            'ext': 'mp4',
+            'title': 'Background',
+            'description': 'md5:49c83c09404b15e6e71defaf87f6b305',
+            'duration': 360,
+        },
+        'skip': 'Requires platzi account credentials',
+        'params': {
+            'skip_download': True,
+        },
+    }]
+
+    def _real_initialize(self):
+        self._login()
+
+    def _login(self):
+        username, password = self._get_login_info()
+        if username is None:
+            return
+
+        login_page = self._download_webpage(
+            self._LOGIN_URL, None, 'Downloading login page')
+
+        login_form = self._hidden_inputs(login_page)
+
+        login_form.update({
+            'email': username,
+            'password': password,
+        })
+
+        urlh = self._request_webpage(
+            self._LOGIN_URL, None, 'Logging in',
+            data=urlencode_postdata(login_form),
+            headers={'Referer': self._LOGIN_URL})
+
+        # login succeeded
+        if 'platzi.com/login' not in compat_str(urlh.geturl()):
+            return
+
+        login_error = self._webpage_read_content(
+            urlh, self._LOGIN_URL, None, 'Downloading login error page')
+
+        login = self._parse_json(
+            self._search_regex(
+                r'login\s*=\s*({.+?})(?:\s*;|\s*</script)', login_error, 'login'),
+            None)
+
+        for kind in ('error', 'password', 'nonFields'):
+            error = str_or_none(login.get('%sError' % kind))
+            if error:
+                raise ExtractorError(
+                    'Unable to login: %s' % error, expected=True)
+        raise ExtractorError('Unable to log in')
+
+    def _real_extract(self, url):
+        lecture_id = self._match_id(url)
+
+        webpage = self._download_webpage(url, lecture_id)
+
+        data = self._parse_json(
+            self._search_regex(
+                r'client_data\s*=\s*({.+?})\s*;', webpage, 'client data'),
+            lecture_id)
+
+        material = data['initialState']['material']
+        desc = material['description']
+        title = desc['title']
+
+        formats = []
+        for server_id, server in material['videos'].items():
+            if not isinstance(server, dict):
+                continue
+            for format_id in ('hls', 'dash'):
+                format_url = url_or_none(server.get(format_id))
+                if not format_url:
+                    continue
+                if format_id == 'hls':
+                    formats.extend(self._extract_m3u8_formats(
+                        format_url, lecture_id, 'mp4',
+                        entry_protocol='m3u8_native', m3u8_id=format_id,
+                        note='Downloading %s m3u8 information' % server_id,
+                        fatal=False))
+                elif format_id == 'dash':
+                    formats.extend(self._extract_mpd_formats(
+                        format_url, lecture_id, mpd_id=format_id,
+                        note='Downloading %s MPD manifest' % server_id,
+                        fatal=False))
+        self._sort_formats(formats)
+
+        content = str_or_none(desc.get('content'))
+        description = (clean_html(compat_b64decode(content).decode('utf-8'))
+                       if content else None)
+        duration = int_or_none(material.get('duration'), invscale=60)
+
+        return {
+            'id': lecture_id,
+            'title': title,
+            'description': description,
+            'duration': duration,
+            'formats': formats,
+        }
+
+
+class PlatziCourseIE(InfoExtractor):
+    _VALID_URL = r'''(?x)
+                    https?://
+                        (?:
+                            platzi\.com/clases|           # es version
+                            courses\.platzi\.com/classes  # en version
+                        )/(?P<id>[^/?\#&]+)
+                    '''
+    _TESTS = [{
+        'url': 'https://platzi.com/clases/next-js/',
+        'info_dict': {
+            'id': '1311',
+            'title': 'Curso de Next.js',
+        },
+        'playlist_count': 22,
+    }, {
+        'url': 'https://courses.platzi.com/classes/communication-codestream/',
+        'info_dict': {
+            'id': '1367',
+            'title': 'Codestream Course',
+        },
+        'playlist_count': 14,
+    }]
+
+    @classmethod
+    def suitable(cls, url):
+        return False if PlatziIE.suitable(url) else super(PlatziCourseIE, cls).suitable(url)
+
+    def _real_extract(self, url):
+        course_name = self._match_id(url)
+
+        webpage = self._download_webpage(url, course_name)
+
+        props = self._parse_json(
+            self._search_regex(r'data\s*=\s*({.+?})\s*;', webpage, 'data'),
+            course_name)['initialProps']
+
+        entries = []
+        for chapter_num, chapter in enumerate(props['concepts'], 1):
+            if not isinstance(chapter, dict):
+                continue
+            materials = chapter.get('materials')
+            if not materials or not isinstance(materials, list):
+                continue
+            chapter_title = chapter.get('title')
+            chapter_id = str_or_none(chapter.get('id'))
+            for material in materials:
+                if not isinstance(material, dict):
+                    continue
+                if material.get('material_type') != 'video':
+                    continue
+                video_url = urljoin(url, material.get('url'))
+                if not video_url:
+                    continue
+                entries.append({
+                    '_type': 'url_transparent',
+                    'url': video_url,
+                    'title': str_or_none(material.get('name')),
+                    'id': str_or_none(material.get('id')),
+                    'ie_key': PlatziIE.ie_key(),
+                    'chapter': chapter_title,
+                    'chapter_number': chapter_num,
+                    'chapter_id': chapter_id,
+                })
+
+        course_id = compat_str(try_get(props, lambda x: x['course']['id']))
+        course_title = try_get(props, lambda x: x['course']['name'], compat_str)
+
+        return self.playlist_result(entries, course_id, course_title)