--- /dev/null
+#!/usr/bin/python2.6
+# -*- coding: iso-8859-15 -*-
+# $Id$
+# $HeadURL$
+"""Contains functions that maintain/update the cache tables."""
+from sqlalchemy import schema
+from sqlalchemy.sql import select
+import formencode
+from wrpylib import mwdb, wrmwdb, wrmwmarkup
+
+
+class UpdateCacheError(RuntimeError):
+ pass
+
+
+def update_wrsledruncache(connection):
+ """Updates the wrsledruncache table from the wiki. If convert errors occur, an UpdateCacheError exception
+ is raised. No other exception type should be raised under normal circumstances.
+
+ >>> from sqlalchemy.engine import create_engine
+ >>> engine = create_engine('mysql://philipp@localhost:3306/winterrodeln_wiki?charset=utf8&use_unicode=0')
+ >>> update_wrsledruncache(engine.connect())
+ """
+ metadata = schema.MetaData()
+ wrsledruncache = wrmwdb.wrsledruncache_table(metadata)
+ page = mwdb.page_table(metadata)
+ categorylinks = mwdb.categorylinks_table(metadata)
+ revision = mwdb.revision_table(metadata)
+ text = mwdb.text_table(metadata)
+
+ transaction = connection.begin()
+
+ # Query all sled runs
+ q = select([page, categorylinks, revision, text], (page.c.page_latest==revision.c.rev_id) & (text.c.old_id==revision.c.rev_text_id) & (categorylinks.c.cl_from==page.c.page_id) & (categorylinks.c.cl_to==u'Rodelbahn'))
+ sledrun_pages = connection.execute(q)
+ # Original SQL:
+ # sql = u"select page_id, rev_id, old_id, page_title, old_text, 'In_Arbeit' in (select cl_to from categorylinks where cl_from=page_id) as under_construction from page, revision, text, categorylinks where page_latest=rev_id and old_id=rev_text_id and cl_from=page_id and cl_to='Rodelbahn' order by page_title"
+
+ # Delete all existing entries in wrsledruncache
+ # We rely on transactions MySQL InnoDB
+ connection.execute(wrsledruncache.delete())
+
+ # Refill wrsledruncache table
+ for sledrun_page in sledrun_pages:
+ try:
+ start, end, sledrun = wrmwmarkup.rodelbahnbox_to_sledrun(sledrun_page.old_text)
+ sledrun.page_id = sledrun_page.page_id
+ sledrun.page_title = sledrun_page.page_title
+ sledrun.under_construction = connection.execute(select([categorylinks], (categorylinks.c.cl_from==sledrun_page.page_id) & (categorylinks.c.cl_to == u'In_Arbeit')).alias('x').count()).fetchone()[0] > 0 # It would be better to do this in the query above
+ connection.execute(wrsledruncache.insert(sledrun.__dict__))
+ except (RuntimeError, formencode.Invalid) as e:
+ transaction.rollback()
+ error_msg = u"Error at sled run '{0}': {1}".format(sledrun_page.page_title, unicode(e))
+ raise UpdateCacheError(error_msg, sledrun_page.page_title, e)
+ transaction.commit()
+
+
+def update_wrinncache(connection):
+ """Updates the wrinncache table from the wiki. If convert errors occur, an UpdateCacheError exception
+ is raised. No other exception type should be raised under normal circumstances.
+
+ >>> from sqlalchemy.engine import create_engine
+ >>> engine = create_engine('mysql://philipp@localhost:3306/winterrodeln_wiki?charset=utf8&use_unicode=0')
+ >>> update_wrinncache(engine.connect())
+ """
+ metadata = schema.MetaData()
+ wrinncache = wrmwdb.wrinncache_table(metadata)
+ page = mwdb.page_table(metadata)
+ categorylinks = mwdb.categorylinks_table(metadata)
+ revision = mwdb.revision_table(metadata)
+ text = mwdb.text_table(metadata)
+
+ transaction = connection.begin()
+
+ # Query all inns
+ q = select([page, categorylinks, revision, text], (page.c.page_latest==revision.c.rev_id) & (text.c.old_id==revision.c.rev_text_id) & (categorylinks.c.cl_from==page.c.page_id) & (categorylinks.c.cl_to==u'Gasthaus'))
+ inn_pages = connection.execute(q)
+
+ # Delete all existing entries in wrinncache
+ # We rely on transactions MySQL InnoDB
+ connection.execute(wrinncache.delete())
+
+ # Refill wrinncache table
+ for inn_page in inn_pages:
+ try:
+ start, end, inn = wrmwmarkup.gasthausbox_to_inn(inn_page.old_text)
+ inn.page_id = inn_page.page_id
+ inn.page_title = inn_page.page_title
+ inn.under_construction = connection.execute(select([categorylinks], (categorylinks.c.cl_from==inn_page.page_id) & (categorylinks.c.cl_to == u'In_Arbeit')).alias('x').count()).fetchone()[0] > 0 # It would be better to do this in the query above
+ connection.execute(wrinncache.insert(inn.__dict__))
+ except (RuntimeError, formencode.Invalid) as e:
+ transaction.rollback()
+ error_msg = u"Error as inn '{0}': {1}".format(inn_page.page_title, unicode(e))
+ raise UpdateCacheError(error_msg, sledrun_page.page_title, e)
+ transaction.commit()
+