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# utility.py - utility functions, externally usable
import re
from decorator import decorate
from .error import MastodonVersionError
###
# Version check functions, including decorator and parser
###
def parse_version_string(version_string):
"""Parses a semver version string, stripping off "rc" stuff if present."""
string_parts = version_string.split(".")
version_parts = (
int(re.match("([0-9]*)", string_parts[0]).group(0)),
int(re.match("([0-9]*)", string_parts[1]).group(0)),
int(re.match("([0-9]*)", string_parts[2]).group(0))
)
return version_parts
def max_version(*version_strings):
"""Returns the maximum version of all provided version strings."""
return max(version_strings, key=parse_version_string)
def api_version(created_ver, last_changed_ver, return_value_ver):
"""Version check decorator. Currently only checks Bigger Than."""
def api_min_version_decorator(function):
def wrapper(function, self, *args, **kwargs):
if not self.version_check_mode == "none":
if self.version_check_mode == "created":
version = created_ver
else:
version = max_version(last_changed_ver, return_value_ver)
major, minor, patch = parse_version_string(version)
if major > self.mastodon_major:
raise MastodonVersionError("Version check failed (Need version " + version + ")")
elif major == self.mastodon_major and minor > self.mastodon_minor:
raise MastodonVersionError("Version check failed (Need version " + version + ")")
elif major == self.mastodon_major and minor == self.mastodon_minor and patch > self.mastodon_patch:
raise MastodonVersionError("Version check failed (Need version " + version + ", patch is " + str(self.mastodon_patch) + ")")
return function(self, *args, **kwargs)
function.__doc__ = function.__doc__ + "\n\n *Added: Mastodon v" + \
created_ver + ", last changed: Mastodon v" + last_changed_ver + "*"
return decorate(function, wrapper)
return api_min_version_decorator
###
# Dict helper class.
# Defined at top level so it can be pickled.
###
class AttribAccessDict(dict):
def __getattr__(self, attr):
if attr in self:
return self[attr]
else:
raise AttributeError("Attribute not found: " + str(attr))
def __setattr__(self, attr, val):
if attr in self:
raise AttributeError("Attribute-style access is read only")
super(AttribAccessDict, self).__setattr__(attr, val)
###
# List helper class.
# Defined at top level so it can be pickled.
###
class AttribAccessList(list):
def __getattr__(self, attr):
if attr in self:
return self[attr]
else:
raise AttributeError("Attribute not found: " + str(attr))
def __setattr__(self, attr, val):
if attr in self:
raise AttributeError("Attribute-style access is read only")
super(AttribAccessList, self).__setattr__(attr, val)
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