kopia lustrzana https://github.com/hholzgra/maposmatic/
79 wiersze
2.8 KiB
Python
79 wiersze
2.8 KiB
Python
# coding: utf-8
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# maposmatic, the web front-end of the MapOSMatic city map generation system
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# Copyright (C) 2023 Hartmut Holzgraefe
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import logging
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LOG = logging.getLogger('maposmatic')
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import json
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from django.http import HttpResponse, HttpResponseBadRequest
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import ocitysmap
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import www.settings
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from www.maposmatic import helpers, forms, nominatim, models
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def api_papersize(request):
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"""API handler to get the compatible paper sizes for the provided layout
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and bounding box."""
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if request.method != 'POST':
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return HttpResponseBadRequest("ERROR: Bad request")
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f = forms.MapPaperSizeForm(request.POST)
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if not f.is_valid():
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return HttpResponseBadRequest("ERROR: Invalid arguments")
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renderer = ocitysmap.OCitySMap(www.settings.OCITYSMAP_CFG_PATH)
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osmid = f.cleaned_data.get('osmid')
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layout = f.cleaned_data.get('layout')
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stylesheet = renderer.get_stylesheet_by_name(
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f.cleaned_data.get('stylesheet'))
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# Determine geographic area
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if osmid is not None:
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try:
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bbox_wkt, area_wkt = renderer.get_geographic_info(osmid)
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except ValueError:
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LOG.exception("Error determining compatible paper sizes")
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raise
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bbox = ocitysmap.coords.BoundingBox.parse_wkt(bbox_wkt)
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else:
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lat_upper_left = f.cleaned_data.get("lat_upper_left")
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lon_upper_left = f.cleaned_data.get("lon_upper_left")
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lat_bottom_right = f.cleaned_data.get("lat_bottom_right")
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lon_bottom_right = f.cleaned_data.get("lon_bottom_right")
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# Check we have correct floats
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if (lat_upper_left == None or lon_upper_left == None
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or lat_bottom_right == None or lon_bottom_right == None):
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return HttpResponseBadRequest("ERROR: Invalid arguments")
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bbox = ocitysmap.coords.BoundingBox(
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lat_upper_left, lon_upper_left,
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lat_bottom_right, lon_bottom_right)
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renderer_cls = ocitysmap.renderers.get_renderer_class_by_name(layout)
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paper_sizes = sorted(renderer_cls.get_compatible_paper_sizes(bbox, renderer),
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key = lambda p: p['width'])
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return HttpResponse(content=json.dumps(paper_sizes),
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content_type='text/json')
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