planetstack/apigen/modelgen

   1 #!/usr/bin/python
   2
   3 import os
   4 import pdb
   5 import copy
   6 import sys
   7 import json
   8 import re
   9 from django.template import Context, Template
  10
  11 blacklist = ['SingletonModel','PlCoreBase']
  12
  13 # Django set up
  14
  15 sys.path.append('.')
  16 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "planetstack.settings")
  17 from django.db.models.fields.related import ForeignKey, ManyToManyField
  18 from core.models import *
  19
  20 def singular(foo, keys):
  21         for k in keys:
  22                 if (foo==k+'es'):
  23                         return k
  24                 elif (foo==k+'s'):
  25                         return k
  26         raise Exception('Plural to singular error for %s'%foo)
  27
  28 g = globals()
  29
  30 def enum_classes():
  31         model_classes = []
  32         for c in g.values():
  33                 if type(c)==type(PlCoreBase) and c.__name__ not in blacklist:
  34                         model_classes.append(c)
  35         return model_classes
  36
  37
  38 class GenObj(object):
  39         def __str__(self):
  40                 return str(self.model.__name__.lower())
  41
  42         def __init__(self, m):
  43                 self.model = m
  44                 self.props = []
  45                 self.refs = []
  46                 self.plural_name = None
  47
  48         def plural(self):
  49                 if (self.plural_name):
  50                         return self.plural_name
  51                 else:
  52                         name = str(self)
  53                         if (name.endswith('s')):
  54                                 return name+'es'
  55                         else:
  56                                 return name+'s'
  57
  58         def camel(self):
  59                 name = str(self.model.__name__)
  60                 return name
  61
  62 class Generator(dict):
  63         def all(self):
  64                 return self.values()
  65
  66         def regex(self, r):
  67                 filtered = filter(lambda o:re.match(r,str(o)), self.values())
  68                 return filtered
  69
  70         def add_object(self, o):
  71                 obj = GenObj(o)
  72                 fields = o._meta.fields
  73                 self[str(obj).lower()]=obj
  74
  75         def compute_links(self):
  76                 for obj in self.values():
  77                         #if (str(obj)=='network'):
  78                         #       pdb.set_trace()
  79                         fields = obj.model._meta.fields
  80                         for f in fields:
  81                                 if (f and f.rel):
  82                                         to_name = str(f.rel.to)
  83                                 else:
  84                                         to_name = None
  85
  86                                 if type(f)==ForeignKey and to_name and to_name in self.keys():
  87                                         refobj = self[f.to_name]
  88
  89                                         if (str(obj)=='slice' and f.to_name=='networks'):
  90                                                 obj.refs.append(refobj)
  91                                         related_name = f.related_query_name()
  92                                         if (related_name!='+' and related_name.lower()!=str(obj).lower()):
  93                                                 cobj = copy.deepcopy(obj)
  94                                                 cobj.multi = True
  95                                                 cobj.plural_name = related_name
  96                                                 #if (str(refobj)=='slice' and related_name=='networks'):
  97                                                 #       pdb.set_trace()
  98                                                 refobj.refs.append(cobj)
  99                                 else:
 100                                         obj.props.append(f.name)
 101
 102                         m2m = obj.model._meta.many_to_many
 103                         for f in m2m:
 104                                 try:
 105                                         related_model_name = f.m2m_reverse_field_name()
 106                                 except:
 107                                         related_model_name = f.m2m_db_table().rsplit('_',1)[-1]
 108
 109                                 related_name = f.related_query_name()
 110                                 if related_model_name in self.keys():
 111                         #               pdb.set_trace()
 112                                         refobj = self[related_model_name]
 113                                         cobj = copy.deepcopy(obj)
 114                                         cobj.multi=True
 115                                         refobj.refs.append(cobj)
 116
 117                                 if (related_name!='+' and related_name.lower()!=str(obj).lower()):
 118                                         cobj = copy.deepcopy(obj)
 119                                         cobj.multi = True
 120                                         cobj.plural_name = related_name
 121
 122                                         #if (str(refobj)=='slice' and related_name=='networks'):
 123                                         #       pdb.set_trace()
 124                                         refobj.refs.append(cobj)
 125
 126                                         #if (related_name=='networks'):
 127                                                 #pdb.set_trace()
 128                                                 #print str(refobj)
 129
 130
 131
 132
 133 def main():
 134         try:
 135                 output = sys.argv[1]
 136         except:
 137                 print 'Usage: modelgen <output template>'
 138                 exit(1)
 139
 140         generator = Generator()
 141
 142         models = enum_classes()
 143
 144         for m in models:
 145                 generator.add_object(m)
 146
 147         generator.compute_links()
 148         template_contents = open(output).read()
 149         template = Template(template_contents)
 150         context = Context({'generator':generator})
 151         print template.render(context)
 152
 153
 154 if (__name__=='__main__'):
 155         main()