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from turbogears import validators #the shiny validator part
class WidgetSchemaFactory(object):
"""
The purpose of the class is to produce a
validators.Schema object according to method
arguments that are retrieved from minions
"""
def __init__(self,method_argument_dict):
"""
@param method_argument_dict : The dict that is
from minion in format of {'arg':{'type':'string','options':[...]}}
the format is defined in func/minion/func_arg.py
"""
self.method_argument_dict = method_argument_dict
self.validator_list = {} #the validator that will create final schema
def _add_validators(self):
"""
Method is an entry point of factory iters over the all arguments
and according to their types it sends the process to more specialized
validator adders
"""
for argument_name,argument_values in self.method_argument_dict.iteritems():
#some lazy stuff :)
#for ex : _add_int_validator(some_arg)
getattr(self,"_add_%s_validator"%(argument_values['type']))(argument_name)
def _add_boolean_validator(self,argument_name):
bool_data_set = {}
#the optional keyword
if self.method_argument_dict[argument_name].has_key('optional'):
if self.method_argument_dict[argument_name]['optional']:
bool_data_set['not_empty']=False
else:
bool_data_set['not_empty']=True
if bool_data_set:
self.validator_list[argument_name]=validators.Bool(**bool_data_set)
else:
self.validator_list[argument_name]=validators.Bool()
def _add_int_validator(self,argument_name):
"""
Gets the options of the int type and adds a
new validator to validator_list
"""
#the initializer for the int_validator
int_data_set = {}
#the optional keyword
if self.method_argument_dict[argument_name].has_key('optional'):
if self.method_argument_dict[argument_name]['optional']:
int_data_set['not_empty']=False
else:
int_data_set['not_empty']=True
if self.method_argument_dict[argument_name].has_key('range'):
#because the range is [min,max] list the 0 is min 1 is the max
int_data_set['min']=self.method_argument_dict[argument_name]['range'][0]
int_data_set['max']=self.method_argument_dict[argument_name]['range'][1]
if self.method_argument_dict[argument_name].has_key('min'):
int_data_set['min']=self.method_argument_dict[argument_name]['min']
if self.method_argument_dict[argument_name].has_key('max'):
int_data_set['max']=self.method_argument_dict[argument_name]['max']
#add the validator to the list
if int_data_set:
self.validator_list[argument_name]=MinionIntValidator(**int_data_set)
else:
self.validator_list[argument_name]=MinionIntValidator()
def _add_string_validator(self,argument_name):
"""
Gets the options of the string type and adds a
new validator to validator_list
"""
string_data_set={}
str_validator_list =[]
if self.method_argument_dict[argument_name].has_key('optional'):
if self.method_argument_dict[argument_name]['optional']:
string_data_set['not_empty']=False
else:
string_data_set['not_empty']=True
if self.method_argument_dict[argument_name].has_key('min_length'):
string_data_set['min']=self.method_argument_dict[argument_name]['min_length']
if self.method_argument_dict[argument_name].has_key('max_length'):
string_data_set['max']=self.method_argument_dict[argument_name]['max_length']
if self.method_argument_dict[argument_name].has_key('validator'):
str_validator_list.append(getattr(validators,'Regex')(self.method_argument_dict[argument_name]['validator']))
#if we have set a string_data_set
if string_data_set:
str_validator_list.append(getattr(validators,'String')(**string_data_set))
#if true it should be a validator.All thing
if len(str_validator_list)>1:
self.validator_list[argument_name]=getattr(validators,'All')(*str_validator_list)
elif str_validator_list:
self.validator_list[argument_name]=str_validator_list[0]
else: #if there is no option
self.validator_list[argument_name]=getattr(validators,'String')()
def _add_float_validator(self,argument_name):
"""
Gets the options of the float type and adds a
new validator to validator_list
"""
#the initializer for the float_validator
float_data_set = {}
#is it optional
if self.method_argument_dict[argument_name].has_key('optional'):
if self.method_argument_dict[argument_name]['optional']:
float_data_set['not_empty']=False
else:
float_data_set['not_empty']=True
if self.method_argument_dict[argument_name].has_key('min'):
float_data_set['min']=self.method_argument_dict[argument_name]['min']
if self.method_argument_dict[argument_name].has_key('max'):
float_data_set['max']=self.method_argument_dict[argument_name]['max']
#add the validator to the list
if float_data_set:
self.validator_list[argument_name]=MinionFloatValidator(**float_data_set)
else:
self.validator_list[argument_name]=MinionFloatValidator()
def _add_list_validator(self,argument_name,the_type='list'):
"""
Gets the options of the list type and adds a
new validator to validator_list
"""
list_data_set = {}
#is it optional
if self.method_argument_dict[argument_name].has_key('optional'):
if self.method_argument_dict[argument_name]['optional']:
list_data_set['not_empty']=False
else:
list_data_set['not_empty']=True
if self.method_argument_dict[argument_name].has_key('validator'):
list_data_set['regex_string'] = self.method_argument_dict[argument_name]['validator']
if list_data_set:
if the_type == 'list':
self.validator_list[argument_name]=MinionListValidator(**list_data_set)
else:
self.validator_list[argument_name]=MinionHashValidator(**list_data_set)
else:
if the_type == 'list':
self.validator_list[argument_name]=MinionListValidator()
else:
self.validator_list[argument_name]=MinionHashValidator()
def _add_hash_validator(self,argument_name):
"""
Gets the options of the hash type and adds a
new validator to validator_list
"""
self._add_list_validator(argument_name,the_type = 'hash')
def get_ready_schema(self):
"""
Get the final validator schema
"""
final_schema = validators.Schema()
if not self.validator_list:
self._add_validators()
for vd_name,vd in self.validator_list.iteritems():
#setattr(final_schema,vd_name,vd)
getattr(final_schema,'fields')[vd_name]= vd
return final_schema
########################################################################
class MinionIntValidator(validators.FancyValidator):
"""
Confirms that the input/output is of the proper type of int.
"""
#automatically will be assigned
min = None
max = None
def _to_python(self,value,state):
"""
Will check just the type here and return
value to be validated in validate_python
"""
try:
value = int(value)
except (ValueError, TypeError):
raise validators.Invalid('The field should be integer',value,state)
return int(value)
def validate_python(self,value,state):
"""
The actual validator
"""
#firstly run the supers one
if self.min and self.min:
if value < self.min:
raise validators.Invalid('The number you entered should be bigger that %d'%(self.min),value,state)
if self.max and self.max:
if value > self.max:
raise validators.Invalid('The number you entered exceeds the %d'%(self.max),value,state)
##################################################################
class MinionFloatValidator(MinionIntValidator):
def _to_python(self,value,state):
"""
Will check just the type here and return
value to be validated in validate_python
"""
try:
value = float(value)
except (ValueError, TypeError):
raise validators.Invalid('The field should be a float',value,state)
return float(value)
#################################################################
class MinionListValidator(validators.FancyValidator):
regex_string = None
def _to_python(self,value,state):
"""
Will check just the type here and return
value to be validated in validate_python
"""
#will add more beautiful validation here after
#integrate the complex widgets for lists and dicts
if self.not_empty:
if len(value)==0:
raise validators.Invalid('Empty list passed when not_empty is set',value,state)
tmp = []
if type(tmp) != type(value):
value = list(value)
value = [list_value.strip() for list_value in value]
return value
def validate_python(self,value,state):
import re
if self.regex_string:
try:
compiled_regex = re.compile(self.regex_string)
except Exception,e:
raise validators.Invalid('The passed regex_string is not a valid expression'%self.regex_string,value,state)
for list_value in value:
if not re.match(compiled_regex,str(list_value)):
raise validators.Invalid('The %s doesnt match to the regex expression that was supplied'%list_value,value,state)
#there is no else for now :)
class MinionHashValidator(validators.FancyValidator):
regex_string = None
def _to_python(self,value,state):
"""
Will check just the type here and return
value to be validated in validate_python
"""
#will add more beautiful validation here after
#integrate the complex widgets for lists and dicts
if self.not_empty:
if len(value)==0:
raise validators.Invalid('Empty hash passed when not_empty is set',value,state)
#check the type firstly
tmp = {}
if type(tmp) != type(value):
raise validators.Invalid('The value passed to MinionHashValidator should be a dict object',value,state)
#print value
return value
def validate_python(self,value,state):
#print value
import re
if self.regex_string:
try:
compiled_regex = re.compile(self.regex_string)
except Exception,e:
raise validators.Invalid('The passed regex_string is not a valid expression'%self.regex_string,value,state)
for dict_value in value.itervalues():
if not re.match(compiled_regex,str(dict_value)):
raise validators.Invalid('The %s doesnt match to the regex expression that was supplied'%dict_value,value,state)
if __name__ == "__main__":
pass
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