Use string formatter to create source and img_format labels (#1566)

"""

from datetime import date, timedelta

from json import loads

from lxml import html

from searx.url_utils import urlencode, urlparse, parse_qs

from searx.url_utils import urlencode

# engine dependent config

categories = ['images']

search_url = 'https://www.google.com/search'\

    '?{query}'\

    '&tbm=isch'\

    '&gbv=1'\

    '&sa=G'\

    '&yv=2'\

    '&{search_options}'

time_range_attr = "qdr:{range}"

time_range_custom_attr = "cdr:1,cd_min:{start},cd_max{end}"

# do search-request

def request(query, params):

    search_options = {

        'ijn': params['pageno'] - 1,

        'start': (params['pageno'] - 1) * number_of_results

    }

        search_options['tbs'] = time_range_custom_attr.format(start=start, end=end)

    if safesearch and params['safesearch']:

        search_options['safe'] = 'active'

        search_options['safe'] = 'on'

    params['url'] = search_url.format(query=urlencode({'q': query}),

                                      search_options=urlencode(search_options))

# get response from search-request

def response(resp):

    dom = html.fromstring(resp.text)

    results = []

    for element in dom.xpath('//div[@id="search"] //td'):

        link = element.xpath('./a')[0]

        google_url = urlparse(link.xpath('.//@href')[0])

        query = parse_qs(google_url.query)

        source_url = next(iter(query.get('q', [])), None)

        title_parts = element.xpath('./cite//following-sibling::*/text()')

        title_parts.extend(element.xpath('./cite//following-sibling::text()')[:-1])

        result = {

            'title': ''.join(title_parts),

            'content': '',

            'template': 'images.html',

            'url': source_url,

            'img_src': source_url,

            'thumbnail_src': next(iter(link.xpath('.//img //@src')), None)

        }

        if not source_url or not result['thumbnail_src']:

    dom = html.fromstring(resp.text)

    # parse results

    for result in dom.xpath('//div[contains(@class, "rg_meta")]/text()'):

        try:

            metadata = loads(result)

            img_format = "{0} {1}x{2}".format(metadata['ity'], str(metadata['ow']), str(metadata['oh']))

            source = "{0} ({1})".format(metadata['st'], metadata['isu'])

            results.append({'url': metadata['ru'],

                            'title': metadata['pt'],

                            'content': metadata['s'],

                            'source': source,

                            'img_format': img_format,

                            'thumbnail_src': metadata['tu'],

                            'img_src': metadata['ou'],

                            'template': 'images.html'})

        except:

            continue

        results.append(result)

    return results