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