1 files changed, 140 insertions, 0 deletions
diff --git a/src/ppm/providerdb.py b/src/ppm/providerdb.py
new file mode 100644
index 0000000..a1bc394
--- /dev/null
+++ b/src/ppm/providerdb.py
@@ -0,0 +1,140 @@
+# vim: set fileencoding=utf-8 :
+#
+# (C) 2010 Guido Guenther <agx@sigxcpu.org>
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with this program; if not, write to the Free Software
+#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+import os
+import logging
+from lxml import etree
+
+from provider import Provider
+
+class ProviderDB(object):
+    """Proxy to mobile broadband provider database"""
+
+    provider_info = os.getenv('PPM_PROVIDER_DB',
+                              '/usr/share/mobile-broadband-provider-info/'
+                              'serviceproviders.xml')
+    country_codes = '/usr/share/zoneinfo/iso3166.tab'
+
+    def __init__(self):
+        self.__tree = None
+        self.__countries = {}
+
+    @property
+    def tree(self):
+        if self.__tree:
+            return self.__tree
+        else:
+            self.__tree = etree.parse(self.provider_info)
+            return self.__tree
+
+    @property
+    def countries(self):
+        if self.__countries:
+            return self.__countries
+        else:
+            self._tree = self._load_countries()
+            return self.__countries
+        
+    def _load_countries(self):
+        try:
+            for line in file(self.country_codes, 'r'):
+                if line[0] != '#':
+                    (code, country) = line.split('\t',2)
+                    self.__countries[code.lower()] = country.strip()
+        except IOError as msg:
+            logging.warning("Loading country code database failed: %s" % msg)
+
+    def _fill_provider_info(self, provider_elem):
+        """Fill a provider object with data from the XML"""
+        name = provider_elem.xpath("./name")[0].text
+        country = provider_elem.getparent().attrib['code']
+        gsm_elem = provider_elem.xpath("./gsm")
+        provider = Provider(country = country,
+                            name = name)
+        if gsm_elem:
+            self._fill_balance_check_cmd(gsm_elem[0], provider)
+            self._fill_top_up_cmd(gsm_elem[0], provider)
+        return provider
+
+    def _fill_balance_check_cmd(self, xmlelemnt, provider):
+        """Fetch balance check method from XML and add it to the provider"""
+        for child in xmlelemnt.iter(tag='balance-check'):
+            check_types = child.getchildren()
+            for t in check_types:
+                if t.tag == 'ussd':
+                    sequence = t.text
+                    provider.add_fetch_balance_cmd({'ussd': sequence})
+                if t.tag == 'sms':
+                    number = t.text
+                    text = t.attrib['text']
+                    provider.add_fetch_balance_cmd({'sms': (number, text)})
+
+    def _fill_top_up_cmd(self, xmlelement, provider):
+        for child in xmlelement.iter(tag='balance-top-up'):
+            check_types = child.getchildren()
+            for t in check_types:
+                if t.tag == 'ussd':
+                    sequence = t.text
+                    replacement = t.attrib['replacement']
+                    provider.add_top_up_cmd({'ussd': [sequence, replacement]})
+                if t.tag == 'sms':
+                    number = t.text
+                    text = t.attrib['text']
+                    provicer.add_top_up_cmd({'sms': (number, text)})
+                    
+    def get_providers(self, mcc, mnc):
+        """
+        Get possible providers for the current mcc and mnc from the database
+        """
+        path = "//network-id[@mcc='%s' and @mnc='%s']" % (mcc, mnc)
+        searcher = etree.ETXPath(path)
+        providers = []
+
+        for r in searcher(self.tree):
+            provider_elem = r.getparent().getparent()
+            providers.append(self._fill_provider_info(provider_elem))
+        return providers
+
+    def get_provider(self, country_code, name):
+        path = "//country[@code='%s']/provider[name='%s']" % (country_code, name)
+        searcher = etree.ETXPath(path)
+
+        for r in searcher(self.tree):
+            return self._fill_provider_info(r)
+        return None
+        
+    def get_country_codes(self):
+        path = "/serviceproviders/country"
+        searcher = etree.ETXPath(path)
+
+        for r in searcher(self.tree):
+            yield r.attrib['code']
+
+    def get_countries(self):
+        for code in self.get_country_codes():
+            try:
+                yield (self.countries[code], code)
+            except KeyError:
+                yield (None, code)
+    
+    def get_providers_by_code(self, country_code):
+        path = ("/serviceproviders/country[@code='%s']/provider/name" %
+                country_code)
+        searcher = etree.ETXPath(path)
+
+        for r in searcher(self.tree):
+            yield r.text