La til litt av koden fra dibbler, til inspirasjon
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parent
21755a5bde
commit
42a4dae5fc
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@ -0,0 +1,405 @@
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exit_commands = ['exit', 'abort', 'quit', 'bye', 'eat flaming death', 'q']
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help_commands = ['help', '?']
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context_commands = ['what', '??']
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local_help_commands = ['help!', '???']
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class Menu():
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def __init__(self, name, items=[], prompt='> ',
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return_index=True,
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exit_msg=None, exit_confirm_msg=None, exit_disallowed_msg=None,
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help_text=None, uses_db=False):
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self.name = name
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self.items = items
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self.prompt = prompt
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self.return_index = return_index
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self.exit_msg = exit_msg
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self.exit_confirm_msg = exit_confirm_msg
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self.exit_disallowed_msg = exit_disallowed_msg
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self.help_text = help_text
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self.context = None
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self.header_format = '[%s]'
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self.uses_db = uses_db
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def exit_menu(self):
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if self.exit_disallowed_msg != None:
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print self.exit_disallowed_msg
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return
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if self.exit_confirm_msg != None:
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if not self.confirm(self.exit_confirm_msg, default=True):
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return
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raise ExitMenu()
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def at_exit(self):
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if self.exit_msg:
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print self.exit_msg
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def set_context(self, string, display=True):
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self.context = string
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if self.context != None and display:
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print self.context
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def add_to_context(self, string):
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self.context += string
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def printc(self, string):
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print string
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if self.context == None:
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self.context = string
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else:
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self.context += '\n' + string
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def show_context(self):
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print self.header_format % self.name
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if self.context != None:
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print self.context
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def item_is_submenu(self, i):
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return isinstance(self.items[i], Menu)
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def item_name(self, i):
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if self.item_is_submenu(i):
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return self.items[i].name
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elif isinstance(self.items[i], tuple):
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return self.items[i][1]
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else:
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return self.items[i]
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def item_value(self, i):
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if isinstance(self.items[i], tuple):
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return self.items[i][0]
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if self.return_index:
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return i
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return self.items[i]
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def input_str(self, prompt=None, regex=None, length_range=(None,None),
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empty_string_is_none=False):
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if regex != None:
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while True:
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result = self.input_str(prompt, length_range=length_range,
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empty_string_is_none=empty_string_is_none)
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if result == None or re.match(regex+'$', result):
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return result
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else:
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print 'Value must match regular expression "%s"' % regex
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if length_range != (None,None):
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while True:
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result = self.input_str(prompt, empty_string_is_none=empty_string_is_none)
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if result == None:
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length = 0
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else:
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length = len(result)
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if ((length_range[0] and length < length_range[0]) or
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(length_range[1] and length > length_range[1])):
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if length_range[0] and length_range[1]:
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print 'Value must have length in range [%d,%d]' % length_range
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elif length_range[0]:
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print 'Value must have length at least %d' % length_range[0]
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else:
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print 'Value must have length at most %d' % length_range[1]
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else:
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return result
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if prompt == None:
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prompt = self.prompt
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while True:
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try:
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result = unicode(raw_input(safe_str(prompt)),
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conf.input_encoding)
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except EOFError:
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print 'quit'
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self.exit_menu()
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continue
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if result in exit_commands:
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self.exit_menu()
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continue
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if result in help_commands:
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self.general_help()
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continue
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if result in local_help_commands:
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self.local_help()
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continue
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if result in context_commands:
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self.show_context()
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continue
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# if result in faq_commands:
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# FAQMenu().execute()
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# continue
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# if result in restart_commands:
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# if self.confirm('Restart Dibbler?'):
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# restart()
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# continue
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if empty_string_is_none and result == '':
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return None
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return result
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def input_int(self, prompt=None, allowed_range=(None,None)):
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if prompt == None:
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prompt = self.prompt
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while True:
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result = self.input_str(prompt)
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try:
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value = int(result)
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if ((allowed_range[0] and value < allowed_range[0]) or
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(allowed_range[1] and value > allowed_range[1])):
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if allowed_range[0] and allowed_range[1]:
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print 'Value must be in range [%d,%d]' % allowed_range
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elif allowed_range[0]:
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print 'Value must be at least %d' % allowed_range[0]
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else:
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print 'Value must be at most %d' % allowed_range[1]
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else:
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return value
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except ValueError:
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print 'Please enter an integer'
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# def input_user(self, prompt=None):
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# user = None
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# while user == None:
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# user = self.retrieve_user(self.input_str(prompt))
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# return user
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# def retrieve_user(self, search_str):
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# return self.search_ui(search_user, search_str, 'user')
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# def input_product(self, prompt=None):
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# product = None
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# while product == None:
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# product = self.retrieve_product(self.input_str(prompt))
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# return product
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# def retrieve_product(self, search_str):
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# return self.search_ui(search_product, search_str, 'product')
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# def input_thing(self, prompt=None, permitted_things=('user','product'),
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# add_nonexisting=(), empty_input_permitted=False):
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# result = None
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# while result == None:
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# search_str = self.input_str(prompt)
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# if search_str == '' and empty_input_permitted:
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# return None
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# result = self.search_for_thing(search_str, permitted_things, add_nonexisting)
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# return result
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# def search_for_thing(self, search_str, permitted_things=('user','product'),
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# add_nonexisting=()):
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# search_fun = {'user': search_user,
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# 'product': search_product}
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# results = {}
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# result_values = {}
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# for thing in permitted_things:
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# results[thing] = search_fun[thing](search_str, self.session)
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# result_values[thing] = self.search_result_value(results[thing])
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# selected_thing = argmax(result_values)
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# if results[selected_thing] == []:
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# thing_for_type = {'card': 'user', 'username': 'user',
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# 'bar_code': 'product'}
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# type_guess = guess_data_type(search_str)
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# if type_guess != None and thing_for_type[type_guess] in add_nonexisting:
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# return self.search_add(search_str)
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# print 'No match found for "%s".' % search_str
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# return None
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# return self.search_ui2(search_str, results[selected_thing], selected_thing)
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def search_result_value(self, result):
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if result == None:
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return 0
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if not isinstance(result, list):
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return 3
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if len(result) == 0:
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return 0
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if len(result) == 1:
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return 2
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return 1
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def search_add(self, string):
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type_guess = guess_data_type(string)
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if type_guess == 'username':
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print '"%s" looks like a username, but no such user exists.' % string
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if self.confirm('Create user %s?' % string):
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user = User(string, None)
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self.session.add(user)
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return user
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return None
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if type_guess == 'card':
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selector = Selector('"%s" looks like a card number, but no user with that card number exists.' % string,
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[('create', 'Create user with card number %s' % string),
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('set', 'Set card number of an existing user to %s' % string)])
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selection = selector.execute()
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if selection == 'create':
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username = self.input_str('Username for new user (should be same as PVV username)> ',
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User.name_re, (1,10))
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user = User(username, string)
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self.session.add(user)
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return user
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if selection == 'set':
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user = self.input_user('User to set card number for> ')
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old_card = user.card
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user.card = string
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print 'Card number of %s set to %s (was %s)' % (user.name, string, old_card)
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return user
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return None
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if type_guess == 'bar_code':
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print '"%s" looks like the bar code for a product, but no such product exists.' % string
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return None
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def search_ui(self, search_fun, search_str, thing):
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result = search_fun(search_str, self.session)
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return self.search_ui2(search_str, result, thing)
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def search_ui2(self, search_str, result, thing):
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if not isinstance(result, list):
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return result
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if len(result) == 0:
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print 'No %ss matching "%s"' % (thing, search_str)
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return None
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if len(result) == 1:
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msg = 'One %s matching "%s": %s. Use this?' %\
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(thing, search_str, unicode(result[0]))
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if self.confirm(msg, default=True):
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return result[0]
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return None
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limit = 9
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if len(result) > limit:
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select_header = '%d %ss matching "%s"; showing first %d' % \
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(len(result), thing, search_str, limit)
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select_items = result[:limit]
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else:
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select_header = '%d %ss matching "%s"' % \
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(len(result), thing, search_str)
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select_items = result
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selector = Selector(select_header, items=select_items,
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return_index=False)
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return selector.execute()
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def confirm(self, prompt, default=None):
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return ConfirmMenu(prompt, default).execute()
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def print_header(self):
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print
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print self.header_format % self.name
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def pause(self):
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self.input_str('.')
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def general_help(self):
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print '''
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DIBBLER HELP
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The following commands are recognized (almost) everywhere:
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help, ? -- display this help
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what, ?? -- redisplay the current context
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help!, ??? -- display context-specific help (if any)
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faq -- display frequently asked questions (with answers)
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exit, quit, etc. -- exit from the current menu
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When prompted for a user, you can type (parts of) the user name or
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card number. When prompted for a product, you can type (parts of) the
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product name or barcode.
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About payment and "credit": When paying for something, use either
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Dibbler or the good old money box -- never both at the same time.
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Dibbler keeps track of a "credit" for each user, which is the amount
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of money PVVVV owes the user. This value decreases with the
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appropriate amount when you register a purchase, and you may increase
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it by putting money in the box and using the "Adjust credit" menu.
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'''
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def local_help(self):
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if self.help_text == None:
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print 'no help here'
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else:
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print
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print 'Help for %s:' % (self.header_format%self.name)
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print self.help_text
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def execute(self):
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self.set_context(None)
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try:
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if self.uses_db:
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self.session = Session()
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else:
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self.session = None
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return self._execute()
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except ExitMenu:
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self.at_exit()
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return None
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finally:
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if self.session != None:
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self.session.close()
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self.session = None
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def _execute(self):
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line_format = '%' + str(len(str(len(self.items)))) + 'd ) %s'
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while True:
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self.print_header()
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self.set_context(None)
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if len(self.items)==0:
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self.printc('(empty menu)')
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self.pause()
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return None
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for i in range(len(self.items)):
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self.printc(line_format % (i+1, self.item_name(i)))
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item_i = self.input_int(self.prompt, (1,len(self.items)))-1
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if self.item_is_submenu(item_i):
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self.items[item_i].execute()
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else:
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return self.item_value(item_i)
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class Selector(Menu):
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def __init__(self, name, items=[], prompt='select> ',
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return_index=True,
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exit_msg=None, exit_confirm_msg=None,
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help_text=None):
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Menu.__init__(self, name, items, prompt, return_index, exit_msg)
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self.header_format = '%s'
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def print_header(self):
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print self.header_format % self.name
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def local_help(self):
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if self.help_text == None:
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print 'This is a selection menu. Enter one of the listed numbers, or'
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print '\'exit\' to go out and do something else.'
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else:
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print
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print 'Help for selector (%s):' % self.name
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print self.help_text
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class ConfirmMenu(Menu):
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def __init__(self, prompt='confirm?', default=None):
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Menu.__init__(self, 'question', prompt=prompt,
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exit_disallowed_msg='Please answer yes or no')
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self.default=default
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def _execute(self):
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options = {True: '[y]/n', False: 'y/[n]', None: 'y/n'}[self.default]
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while True:
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result = self.input_str('%s (%s) ' % (self.prompt, options))
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result = result.lower()
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if result in ['y','yes']:
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return True
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if result in ['n','no']:
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return False
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if self.default != None and result == '':
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return self.default
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print 'Please answer yes or no'
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class MessageMenu(Menu):
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def __init__(self, name, message, pause_after_message=True):
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Menu.__init__(self, name)
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self.message = message.strip()
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self.pause_after_message = pause_after_message
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def _execute(self):
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self.print_header()
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print
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print self.message
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if self.pause_after_message:
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self.pause()
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