+++ /dev/null
-"""Creates an Atom-Feed for single or multiple winterrodeln sled reports.
-
-Format:
- http://www.winterrodeln.org/feed/berichte/alle
- http://www.winterrodeln.org/feed/berichte/bahn/kemater_alm
- http://www.winterrodeln.org/feed/berichte/bahnen/5+280+251
- http://www.winterrodeln.org/feed/berichte/region/osttirol
-See:
- http://www.atompub.org/
- http://effbot.org/zone/element.htm
- http://www.winterrodeln.org/trac/wiki/UrlSchema
-"""
-import datetime
-from xml.etree.ElementTree import Element, SubElement, tostring
-from osgeo import ogr
-from flask import url_for
-
-
-class CreateFeedError(RuntimeError):
- pass
-
-
-class RegionNotFoundError(CreateFeedError):
- pass
-
-
-def create_feed(conn, limit, page_title=None, page_ids=None, region_name=None):
- """If a page_title is given, only the reports for the given sledrun are shown.
- If a list of page_ids is given, only the reports for the selected pages are shown.
- If a region name (lower case) is given, the reports just for this region are shown.
- Otherwise, all reports are shown."""
- select = 'select wrreport.page_id, wrreport.page_title, wrreport.id, date_report, date_entry, `condition`, description, author_name, author_userid, author_username, position_longitude, position_latitude from wrreport left outer join wrsledruncache on wrreport.page_id=wrsledruncache.page_id'
- where = 'where date_invalid > now() and delete_date is null'
- order = 'order by id desc'
- limit = 'limit {0}'.format(limit)
- params = []
-
- if not page_title is None:
- # page_title is given
- page_title = page_title.replace('_', ' ')
- where += ' and lcase(wrreport.page_title) = lcase(%s)'
- params += [page_title]
- elif not page_ids is None:
- # a list of page_ids is given
- assert len(page_ids) > 0
- where += ' and ('
- where += " or ".join(['wrreport.page_id=%s' for page_id in page_ids])
- where += ')'
- params += list(map(str, page_ids))
- elif not region_name is None:
- # a name of a region is given
- # (1) find out whether the region exists
- subselect = 'select aswkb(border) as border_wkb from wrregion where name=lcase(%s)'
- subresult = conn.execute(subselect, region_name)
- if subresult.rowcount == 0:
- # no region with such a name
- raise RegionNotFoundError(region_name)
- assert subresult.rowcount == 1
- row = subresult.fetchone()
- # (2) now we have the border
- border_wkb = row['border_wkb'] # border as WKB
- where += ' and contains(geomfromwkb(%s), point(position_longitude, position_latitude))'
- params += [border_wkb]
- # the following variables are needed for the additional filtering below
- border = ogr.CreateGeometryFromWkb(border_wkb)
- point = ogr.Geometry(ogr.wkbPoint)
- else:
- # user wants to have all reports
- pass
- sql = ' '.join([select, where, order, limit])
- result = conn.execute(sql, *params)
-
- feed = Element("feed", xmlns="http://www.w3.org/2005/Atom", attrib={'xmlns:georss': 'http://www.georss.org/georss', 'xmlns:wr': 'http://www.winterrodeln.org/schema/wrreport'})
- feed_title = SubElement(feed, "title")
- feed_title.text = "Winterrodeln Rodelbahnberichte"
- feed_id = SubElement(feed, "id")
- if not page_title is None:
- feed_id.text = url_for('bahn', bahn=page_title, _external=True)
- elif not page_ids is None:
- feed_id.text = url_for('bahnen', bahnen="+".join(map(str, page_ids)), _external=True)
- elif not region_name is None:
- feed_id.text = url_for('region', region=region_name, _external=True)
- else:
- feed_id.text = url_for('alle', _external=True)
- feed_updated = SubElement(feed, "updated")
- feed.append(Element("link", rel="self", href=feed_id.text))
-
- last_updated = None
- for row in result:
- page_id, page_title, report_id, date_report, date_entry, condition, description, author_name, author_userid, author_username, lon, lat = row
-
- if not region_name is None:
- # mysql 5.5 doesn't have specification conform geospacial functions.
- # http://dev.mysql.com/doc/refman/5.5/en/functions-for-testing-spatial-relations-between-geometric-objects.html
- # therefore we have to do further filtering here.
- point.SetPoint(0, lon, lat)
- if not point.Within(border):
- continue
-
- page_title_url = page_title.replace(' ', '_')
- entry = SubElement(feed, "entry")
- entry_title = SubElement(entry, "title")
- entry_title.text = page_title
- entry.append(Element("link", rel="alternate", href="http://www.winterrodeln.org/wiki/{0}".format(page_title_url), type="text/html", hreflang="de"))
- entry_id = SubElement(entry, "id")
- entry_id.text = "http://www.winterrodeln.org/wiki/{0}#{1}".format(page_title_url, report_id)
- entry_updated = SubElement(entry, "updated")
- entry_updated.text = date_entry.isoformat() + "+01:00"
- if last_updated is None: last_updated = date_entry
- # entry_summary = SubElement(entry, "summary")
- # entry_summary.text = str(condition)
- entry_content = SubElement(entry, "content")
- entry_content.attrib["type"] = "xhtml"
- entry_content_div = SubElement(entry_content, "div")
- entry_content_div.attrib["xmlns"] = "http://www.w3.org/1999/xhtml"
- entry_content_ul = SubElement(entry_content_div, "ul")
- if not date_report is None:
- entry_content_date = SubElement(entry_content_ul, "li")
- entry_content_date.text = "Bericht für " + date_report.isoformat()
- if not condition is None:
- entry_content_condition = SubElement(entry_content_ul, "li")
- entry_content_condition.text = "Schneelage: " + {1: 'Sehr gut', 2: 'Gut', 3: 'Mittelmäßig', 4: 'Schlecht', 5: 'Geht nicht'}[condition]
- entry_content_description = SubElement(entry_content_ul, "li")
- entry_content_description.text = description
- entry_author = SubElement(entry, "author")
- entry_author_name = SubElement(entry_author, "name")
- if author_name is None or len(author_name.strip()) == 0: entry_author_name.text = "Anonymous user"
- else: entry_author_name.text = author_name
- if not lon is None and not lat is None:
- entry_geo = SubElement(entry, "georss:point")
- entry_geo.text = "{lat} {lon}".format(lat=lat, lon=lon)
- entry_wrreport = SubElement(entry, "wr:report")
- entry_wrreport.attrib['report_id'] = str(report_id)
- entry_wrreport.attrib['page_id'] = str(page_id)
- entry_wrreport.attrib['page_title'] = page_title
- entry_wrreport.attrib['date_report'] = str(date_report)
- entry_wrreport.attrib['date_entry'] = str(date_entry)
- entry_wrreport.attrib['condition'] = "0" if condition is None else str(condition)
- entry_wrreport.attrib['author_name'] = author_name
- entry_wrreport.attrib['author_username'] = "" if author_userid is None else author_username
- entry_wrreport.text = description
-
- if last_updated is None: last_updated = datetime.datetime.now()
- feed_updated.text = last_updated.isoformat() + "+01:00"
-
- return b'<?xml version="1.0" encoding="utf-8"?>\n' + tostring(feed)
ToastFreeware / philipp / winterrodeln / wrfeed.git / blobdiff