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api: put functions in a class

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master
dece 4 years ago
parent 2eb84bd746
commit c54f4f0fe7
2 changed files with 163 additions and 170 deletions
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309
scaruffi/api.py
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@ -1,3 +1,4 @@
import logging
import re
from dataclasses import dataclass
@ -7,8 +8,6 @@ import requests
import scaruffi.log
LOG = None
SITE_URL = "https://scaruffi.com"
GENERAL_INDEX = SITE_URL + "/music/groups.html"
RATINGS_DECADES = SITE_URL + "/ratings/{:02}.html"
@ -21,163 +20,153 @@ class Release:
year: int = 0 # Usually the release year, not the recording year.
def setup_logging(*args, **kwargs):
global LOG
LOG = scaruffi.log.get_logger(*args, **kwargs)
def _get_page(url):
LOG.debug(f"GET {url}")
try:
response = requests.get(url)
except requests.exceptions.RequestException as exc:
LOG.error(f"An exception occured during HTTP GET: {exc}")
return None
sc = response.status_code
if sc != 200:
LOG.error(f"Server returned HTTP response {sc} to {url}.")
return None
return response.text
def _get_soup(url):
html = _get_page(url)
if not html:
return None
return BeautifulSoup(html, "html5lib")
def get_musicians(offset=0, limit=20):
"""Get a list of musicians, or None on error."""
soup = _get_soup(GENERAL_INDEX)
if not soup:
return None
# Semantic Web? Just find the fattest table.
mu_table = max(soup.find_all("table"), key=lambda t: len(t.text))
musicians = [a_tag.text for a_tag in mu_table.find_all("a")]
return musicians[offset : offset + limit]
def get_ratings(decade):
"""Get a dict of ratings to a release list for this decade.
The decade must be an integer in the [0, 99] range, or a full year
(1960 for example). Returns None on error.
"""
if 1900 <= decade:
decade %= 100
if not (0 <= decade < 100 and decade % 10 == 0):
LOG.error(f"Invalid decade value: {decade}.")
return None
soup = _get_soup(RATINGS_DECADES.format(decade))
if not soup:
return None
ratings_table = max(soup.find_all("table"), key=lambda t: len(t.text))
num_lists = len(ratings_table("ul"))
if num_lists == 1:
return _get_ratings_from_unique_list(ratings_table.ul)
else:
return _get_ratings_from_lists(ratings_table("ul"))
def _get_ratings_from_unique_list(messy_list):
"""Get ratings from decades where one list contains all ratings."""
ratings = {}
current_key = None
for tag in messy_list:
if isinstance(tag, NavigableString):
continue
# Get an entry for the current rating.
if tag.name == "li":
release = _parse_release(tag.text)
if not current_key:
LOG.critical(f"Found release {release} without rating.")
class ScaruffiApi:
def __init__(self, log_level=logging.WARNING):
self.log = scaruffi.log.get_logger("scaruffi", level=log_level)
def _get_soup(self, url):
html = self._get_page(url)
if not html:
return None
return BeautifulSoup(html, "html5lib")
def _get_page(self, url):
self.log.debug(f"GET {url}")
try:
response = requests.get(url)
except requests.exceptions.RequestException as exc:
self.log.error(f"An exception occured during HTTP GET: {exc}")
return None
sc = response.status_code
if sc != 200:
self.log.error(f"Server returned HTTP response {sc} to {url}.")
return None
return response.text
def get_musicians(self, offset=0, limit=20):
"""Get a list of musicians, or None on error."""
soup = self._get_soup(GENERAL_INDEX)
if not soup:
return None
# Semantic Web? Just find the fattest table.
mu_table = max(soup.find_all("table"), key=lambda t: len(t.text))
musicians = [a_tag.text for a_tag in mu_table.find_all("a")]
return musicians[offset : offset + limit]
def get_ratings(self, decade):
"""Get a dict of ratings to a release list for this decade.
The decade must be an integer in the [0, 99] range, or a full year
(1960 for example). Returns None on error.
"""
if 1900 <= decade:
decade %= 100
if not (0 <= decade < 100 and decade % 10 == 0):
self.log.error(f"Invalid decade value: {decade}.")
return None
soup = self._get_soup(RATINGS_DECADES.format(decade))
if not soup:
return None
ratings_table = max(soup.find_all("table"), key=lambda t: len(t.text))
num_lists = len(ratings_table("ul"))
if num_lists == 1:
return self._get_ratings_from_unique_list(ratings_table.ul)
else:
return self._get_ratings_from_lists(ratings_table("ul"))
def _get_ratings_from_unique_list(self, messy_list):
"""Get ratings from decades where one list contains all ratings."""
ratings = {}
current_key = None
for tag in messy_list:
if isinstance(tag, NavigableString):
continue
# Get an entry for the current rating.
if tag.name == "li":
release = self._parse_release(tag.text)
if not current_key:
self.log.critical(f"Release {release} without rating.")
return None
ratings[current_key].append(release)
# Detect a new rating list.
# Do it after getting entries in tag due to bad HTML.
text = tag.text.strip()
if text:
rating = self._match_rating(text.split()[-1])
if rating is not None:
current_key = rating
ratings[current_key] = []
return ratings
def _get_ratings_from_lists(self, lists):
"""Get ratings from several lists, one per rating."""
ratings = {}
for ul in lists:
rating_tag = ul.span
if rating_tag:
rating = self._match_rating(rating_tag.text)
if rating is None:
self.log.critical("Failed to find rating tag in list.")
return None
ratings[current_key].append(release)
# Detect a new rating list.
# Do it after getting entries in tag due to bad HTML.
text = tag.text.strip()
if text:
rating = _match_rating(text.split()[-1])
if rating is not None:
current_key = rating
ratings[current_key] = []
return ratings
def _get_ratings_from_lists(lists):
"""Get ratings from several lists, one per rating."""
ratings = {}
for ul in lists:
rating_tag = ul.span
if rating_tag:
rating = _match_rating(rating_tag.text)
if rating is None:
LOG.critical("Failed to find rating tag in list.")
releases = [self._parse_release(li.text) for li in ul("li")]
ratings[rating] = releases
return ratings
RATING_RE = re.compile(r"\s*(\d(.\d)?)/10\s*")
def _match_rating(self, text):
"""Try to match text as a rating and return the rating, or None."""
if not text.strip():
return None
match = self.RATING_RE.match(text.strip())
if match:
return float(match.group(1))
def _parse_release(self, entry):
"""Fill a release fields using entry, as well as we can."""
entry = entry.strip("\r\n :") # Remove bogus spaces and colons.
parts = entry.split(": ")
if len(parts) == 1:
self.log.info(f"No colon in {entry}, using both as artist & title.")
title_and_year = self._parse_release_title_year(entry)
if not title_and_year:
return Release(title=entry)
title, year = title_and_year
artist = title
else:
# Usual case is 2 parts ("artist: title"), but in case one of them
# contains ": " as well, assume that it is part of the title, not
# the artist name.
artist = parts[0]
title_and_year_str = parts[1].strip()
if len(parts) > 2:
title_and_year_str += ": " + ": ".join(parts[2:])
title_and_year = self._parse_release_title_year(title_and_year_str)
if not title_and_year:
return Release(artist=artist, title=title_and_year_str)
title, year = title_and_year
return Release(artist=artist, title=title, year=year)
RATING_TITLE_AND_YEAR_RE = re.compile(r"(.+?)\s?\((\d{4})(?:-\d+)?\)")
def _parse_release_title_year(self, title_year):
"""Parse title and year in the approximate "title (year)" format.
In some instances, the year is actually a range of years, in the YYYY-YY
format. Sometimes there is no space between title and year."""
match = self.RATING_TITLE_AND_YEAR_RE.match(title_year)
if not match:
self.log.error(f"Failed to split title/year in \"{title_year}\".")
return None
groups = match.groups()
if len(groups) != 2 or None in groups:
self.log.error(f"Failed to parse title/year in \"{title_year}\".")
return None
releases = [_parse_release(li.text) for li in ul("li")]
ratings[rating] = releases
return ratings
RATING_RE = re.compile(r"\s*(\d(.\d)?)/10\s*")
def _match_rating(text):
"""Try to match text as a rating and return the rating, or None."""
if not text.strip():
return None
match = RATING_RE.match(text.strip())
if match:
return float(match.group(1))
def _parse_release(entry):
"""Fill a release fields using entry, as well as we can."""
entry = entry.strip("\r\n :") # Remove bogus spaces and colons.
parts = entry.split(": ")
if len(parts) == 1:
LOG.info(f"No colon in {entry}, using both as artist and title.")
title_and_year = _parse_release_title_year(entry)
if not title_and_year:
return Release(title=entry)
title, year = title_and_year
artist = title
else:
# Usual case is 2 parts ("artist: title"), but in case one of them
# contains ": " as well, assume that it is part of the title, not the
# artist name.
artist = parts[0]
title_and_year_str = parts[1].strip()
if len(parts) > 2:
title_and_year_str += ": " + ": ".join(parts[2:])
title_and_year = _parse_release_title_year(title_and_year_str)
if not title_and_year:
return Release(artist=artist, title=title_and_year_str)
title, year = title_and_year
return Release(artist=artist, title=title, year=year)
RATING_TITLE_AND_YEAR_RE = re.compile(r"(.+?)\s?\((\d{4})(?:-\d+)?\)")
def _parse_release_title_year(title_and_year):
"""Parse title and year in the approximate "title (year)" format.
In some instances, the year is actually a range of years, in the YYYY-YY
format. Sometimes there is no space between title and year."""
match = RATING_TITLE_AND_YEAR_RE.match(title_and_year)
if not match:
LOG.error(f"Failed to split title and year in \"{title_and_year}\".")
return None
groups = match.groups()
if len(groups) != 2 or None in groups:
LOG.error(f"Failed to parse title and year in \"{title_and_year}\".")
return None
title, year = groups
try:
year = int(year)
except ValueError:
LOG.error(f"Failed to parse year string \"{year}\" as an integer.")
year = 0
return title, year
title, year = groups
try:
year = int(year)
except ValueError:
self.log.error(f"Failed to parse \"{year}\" as an integer.")
year = 0
return title, year

24
scaruffi/tests.py
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@ -1,21 +1,25 @@
import logging
import unittest
from scaruffi import api
from scaruffi.api import ScaruffiApi
class TestScaruffi(unittest.TestCase):
def setUpClass():
api.setup_logging("test")
def setUp(self):
self.api = ScaruffiApi()
def tearDown(self):
self.api = None
def test_get_musicians(self):
musicians = api.get_musicians()
musicians = self.api.get_musicians()
self.assertEqual(len(musicians), 20)
def test_get_ratings(self):
self.assertIsNotNone(api.get_ratings(1960))
self.assertIsNotNone(api.get_ratings(1970))
self.assertIsNotNone(api.get_ratings(1980))
self.assertIsNotNone(api.get_ratings(1990))
self.assertIsNotNone(api.get_ratings(2000))
self.assertIsNotNone(api.get_ratings(2010))
self.assertIsNotNone(self.api.get_ratings(1960))
self.assertIsNotNone(self.api.get_ratings(1970))
self.assertIsNotNone(self.api.get_ratings(1980))
self.assertIsNotNone(self.api.get_ratings(1990))
self.assertIsNotNone(self.api.get_ratings(2000))
self.assertIsNotNone(self.api.get_ratings(2010))

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