BrowserCompat API CLI

read.py

import os
import requests
from sets import Set
from types import ListType
import sys
from string import Template

supportLine = Template(' - $b ($v): $s')
featureLine = Template('== $feature ==')

if len(sys.argv) >= 1:
  SLUG = sys.argv[1]
else:
  SLUG = 'web-css-position'

ENTRY_CONTEXT_ROOT = '/api/v1/features?slug='
BC_HOST = os.environ.get('BC_HOST', 'https://browsercompat.herokuapp.com')

# http://jakeaustwick.me/extending-the-requests-response-class/
# https://github.com/kennethreitz/grequests
# http://docs.python-requests.org/en/latest/

class Resource:
  '''
  A Python representation of a JSON API response body
  '''
  types = [
     "supports.version",
     "supports.feature",
     "supports.history_current",
     "supports.history",
     "features.sections",
     "features.supports",
     "features.parent",
     "features.children",
     "features.history_current",
     "features.history",
     "versions.browser",
     "versions.supports",
     "versions.history",
     "versions.history_current",
     "browsers.history",
     "browsers.history_current",
     "browsers.versions",
  ]

  parents = Set([])
  keys = []

  type = ''
  links = {}
  relationships = {}
  data = {}
  meta = {}

  def __init__(self, url):
    for t in self.types:
      self.parents.add(t[:t.find('.')])
    #print url
    r = requests.get(url)
    if r.status_code == 200:
      if r.headers['content-type'].find('json') != -1:
        dto = r.json()
        self.keys = dto.keys()
        self.links = dto['links']
        del dto['links']
        self.data = dto
        for key in dto.keys():
          if self.isDataTypeElement(key) == True:
            self.type = key
            if type(dto[key]) is ListType:
              self.data = dto[key][0]
            else:
              self.data = dto[key]

  def getLinks(self, keyword):
    if keyword in self.data['links']:
      links = self.data['links'][keyword]
      linkSelector = self.type + '.' + keyword
      href = self.linkify(linkSelector)
      out = []
      if type(links) is ListType:
        for l in links:
          out.append(href + l)
      else:
        out.append(href + links)
      return out

  def isDataTypeElement(self, check):
    if len(self.parents) == 0:
      raise Exception('Did you initialize this object first?')
    return check in self.parents

  def linkify(self, selector):
    return self.links[selector]['href'].replace('{'+selector+'}','')

feature = Resource(BC_HOST + ENTRY_CONTEXT_ROOT + SLUG)
supports = feature.getLinks('supports')

print featureLine.substitute(feature=feature.data['name'])

for s in supports:
  support = Resource(s)
  versions = support.getLinks('version')
  version = Resource(versions[0])
  browsers = version.getLinks('browser')
  browser = Resource(browsers[0])

  print supportLine.substitute(b=browser.data['name']['en'], v=version.data['version'], s=support.data['support'])