107 lines
3.4 KiB
Python
107 lines
3.4 KiB
Python
# In the real world, costs are expected to be pulled from OpenERP
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# As this is kind of an alpha piece of code, costs are pulled from
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# RIGHT HERE.
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"""
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an Invoice interface consists of:
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Creating an Invoice object that relates to a Client
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Fetching costs for a Resource Type in a Datacenter Region
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Adding lines to the Invoice Object, representing a Usage per Time at Cost
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"""
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from decimal import Decimal
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import csv
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class SalesOrder(object):
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# __metaclass__ = requirements
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def __init__(self, start, end, config):
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self.start = start
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self.end = end
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self.config = config
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def close(self):
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raise NotImplementedError("Not implemented in base class")
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def bill(self, tenant):
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self._bill(tenant)
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def _bill(self, tenant):
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raise NotImplementedError("Not implemented in base class")
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class RatesFileMixin(object):
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# Mixin
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# Adds a rates file loader, expecting various things from the
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# configuration
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def rate(self, name, region=None):
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try:
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self.__rates
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except AttributeError:
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self.__rates = {}
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if not self.__rates:
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self.__rates = {}
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try:
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fh = open(self.config["rates"]["file"])
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# Makes no opinions on the file structure
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reader = csv.reader(fh, delimiter="|")
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for row in reader:
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# The default layout is expected to be:
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# location | rate name | rate measurement | rate value
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self.__rates[row[1].strip()] = {
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"cost": Decimal(row[3].strip()),
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"region": row[0].strip(),
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"measures": row[2].strip()
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}
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if not self.__rates:
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raise IndexError("malformed rates CSV!")
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fh.close()
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except KeyError:
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# couldn't actually find the useful info for rateS?
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print "Couldn't find rates info configuration option!"
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raise
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except IndexError:
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raise IndexError("Malformed rates CSV!")
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except IOError:
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print "Couldn't open the file!"
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raise
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return self.__rates[name]["cost"] # ignore the regions-ness for now
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class NamesFileMixin(object):
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# Mixin
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# Adds a name prettifier
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#
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def pretty_name(self, name):
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try:
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self.__names
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except AttributeError:
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self.__names = {}
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if not self.__names:
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self.__names = {}
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try:
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fh = open(self.config["rates"]["names"])
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# Makes no opinions on the file structure
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reader = csv.reader(fh, delimiter="|")
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for row in reader:
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# The default layout is expected to be:
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# internal name | external name
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self.__names[row[0].strip()] = row[1].strip()
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if not self.__names:
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raise IndexError("Malformed names CSV")
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fh.close()
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except KeyError:
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# couldn't actually find the useful info for rateS?
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print "Couldn't find rates info configuration option!"
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raise
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except IOError:
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print "Couldn't open the file!"
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raise
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return self.__names[name]
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