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observer_generator.py
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observer_generator.py
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import meta_class
import os
from utils import wrap, print_class_must_have_func, generate_commands_add_func, print_class_must_have_decors, \
print_class_must_have_base, generate_commands_add_base
def create_subject():
print('You are creating a Subject class for Observer pattern.')
subject = meta_class.MetaClass()
subject._add_class_name()
class_name = subject.name
base_classes = []
commands = generate_commands_add_base(base_classes)
wrap(subject._add_base_names, commands)
print_class_must_have_base(class_name, base_classes, True)
subject._add_base_names()
curr_func = '__init__'
curr_params = ['observers', 'state']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
curr_func = 'attach'
curr_params = ['observer']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
curr_func = 'detach'
curr_params = ['observer']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
curr_func = '_notify'
curr_params = []
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
curr_func = 'set_state'
curr_params = ['new_state']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
curr_func = 'get_state'
curr_params = []
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(subject._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
subject._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
subject._add_method_decorator(curr_func)
return subject
def create_observer():
print('You are creating a base class for Observer in Observer pattern.')
observer = meta_class.MetaClass()
observer._add_class_name()
class_name = observer.name
base_names = ['ABC']
commands = generate_commands_add_base(base_names)
wrap(observer._add_base_names, commands)
print_class_must_have_base(class_name, base_names, True)
observer._add_base_names()
curr_func = '__init__'
curr_params = ['_subject', '_observer_state']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(observer._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
observer._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
observer._add_method_decorator(curr_func)
curr_func = 'update'
curr_params = ['arg']
curr_decors = ['abstractmethod']
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(observer._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
observer._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
observer._add_method_decorator(curr_func)
return observer
def create_concrete_observer(base_observer_name):
print('You are creating a concrete class for Observer in Observer pattern.')
observer = meta_class.MetaClass()
observer._add_class_name()
class_name = observer.name
base_names = [base_observer_name]
commands = generate_commands_add_base(base_names)
wrap(observer._add_base_names, commands)
print_class_must_have_base(class_name, base_names, True)
observer._add_base_names()
curr_func = 'update'
curr_params = ['arg']
curr_decors = []
commands = generate_commands_add_func(curr_func, curr_params, curr_decors)
wrap(observer._add_method, commands)
print_class_must_have_func(class_name, curr_func, curr_params, True)
observer._add_args_to_method(curr_func)
print_class_must_have_decors(class_name, curr_func, curr_decors, True)
observer._add_method_decorator(curr_func)
return observer
def observer_generator():
subject = create_subject()
base_observer = create_observer()
concrete_observer = create_concrete_observer(base_observer.name)
folder, file = subject.write_class()
base_observer.write_class(folder, file)
concrete_observer.write_class(folder, file)
path = os.path.join(os.getcwd(), folder)
with open(os.path.join(path, file + '.py'), 'r') as f:
lines = f.readlines()
lines.insert(0, 'from abc import ABC, abstractmethod\n')
with open(os.path.join(path, file + '.py'), 'w') as f:
f.writelines(lines)
observer_generator()