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import math
from searx.data import EXTERNAL_URLS
IMDB_PREFIX_TO_URL_ID = {
'tt': 'imdb_title',
'mn': 'imdb_name',
'ch': 'imdb_character',
'co': 'imdb_company',
'ev': 'imdb_event',
}
HTTP_WIKIMEDIA_IMAGE = 'http://commons.wikimedia.org/wiki/Special:FilePath/'
def get_imdb_url_id(imdb_item_id):
id_prefix = imdb_item_id[:2]
return IMDB_PREFIX_TO_URL_ID.get(id_prefix)
def get_wikimedia_image_id(url):
if url.startswith(HTTP_WIKIMEDIA_IMAGE):
return url[len(HTTP_WIKIMEDIA_IMAGE) :]
if url.startswith('File:'):
return url[len('File:') :]
return url
def get_external_url(url_id, item_id, alternative="default"):
"""Return an external URL or None if url_id is not found.
url_id can take value from data/external_urls.json
The "imdb_id" value is automatically converted according to the item_id value.
If item_id is None, the raw URL with the $1 is returned.
"""
if item_id is not None:
if url_id == 'imdb_id':
url_id = get_imdb_url_id(item_id)
elif url_id == 'wikimedia_image':
item_id = get_wikimedia_image_id(item_id)
url_description = EXTERNAL_URLS.get(url_id)
if url_description:
url_template = url_description["urls"].get(alternative)
if url_template is not None:
if item_id is not None:
return url_template.replace('$1', item_id)
else:
return url_template
return None
def get_earth_coordinates_url(latitude, longitude, osm_zoom, alternative='default'):
url = (
get_external_url('map', None, alternative)
.replace('${latitude}', str(latitude))
.replace('${longitude}', str(longitude))
.replace('${zoom}', str(osm_zoom))
)
return url
def area_to_osm_zoom(area):
"""Convert an area in km² into an OSM zoom. Less reliable if the shape is not round.
logarithm regression using these data:
* 9596961 -> 4 (China)
* 3287263 -> 5 (India)
* 643801 -> 6 (France)
* 6028 -> 9
* 1214 -> 10
* 891 -> 12
* 12 -> 13
In WolframAlpha:
>>> log fit {9596961,15},{3287263, 14},{643801,13},{6028,10},{1214,9},{891,7},{12,6}
with 15 = 19-4 (China); 14 = 19-5 (India) and so on
Args:
area (int,float,str): area in km²
Returns:
int: OSM zoom or 19 in area is not a number
"""
try:
amount = float(area)
return max(0, min(19, round(19 - 0.688297 * math.log(226.878 * amount))))
except ValueError:
return 19
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