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authorRené 'Necoro' Neumann <necoro@necoro.net>2008-09-02 13:01:17 +0200
committerRené 'Necoro' Neumann <necoro@necoro.net>2008-09-02 13:01:17 +0200
commitafa1de13f0576ace6dcbb0176490fd20922950cd (patch)
tree056a5fd646f53dfa83f2fe231ec0943747b15ffc /portato/session.py
parent02d96210d9102f0cdec95b4e0f595cbd8fdd1e10 (diff)
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-rw-r--r--portato/session.py202
1 files changed, 101 insertions, 101 deletions
diff --git a/portato/session.py b/portato/session.py
index 5d1a640..9f08ff7 100644
--- a/portato/session.py
+++ b/portato/session.py
@@ -19,104 +19,104 @@ from .constants import SESSION_DIR
from .helper import debug, info
class Session (object):
- """
- A small class allowing to save certain states of a program.
- This class works in a quite abstract manner, as it works with handlers, which
- define what options to use out of the config file and how to apply them to the program.
-
- Note: This class currently does not work with boolean config options. If you
- want to define boolean values, use 0 and 1. This is future proof.
- """
-
- # the current session format version
- VERSION = 1
-
- def __init__ (self, file):
- """
- Initialize a session with a certain file inside L{SESSION_DIR}.
-
- @param file: the file in L{SESSION_DIR}, where the options will be saved.
- """
-
- self._cfg = None
- self._handlers = []
-
- if not (os.path.exists(SESSION_DIR) and os.path.isdir(SESSION_DIR)):
- os.mkdir(SESSION_DIR)
- self._cfg = ConfigParser(os.path.join(SESSION_DIR, file))
- info(_("Loading session from '%s'.") % self._cfg.file)
- try:
- self._cfg.parse()
- except IOError, e:
- if e.errno == 2: pass
- else: raise
-
- # add version check
- self.add_handler(([("version", "session")], self.check_version, lambda: self.VERSION))
-
- def add_handler (self, (options, load_fn, save_fn), default = None):
- """
- Adds a handler to this session. A handler is a three-tuple consisting of:
- - a list of (key,section) values
- - a function getting number of option arguments and applying them to the program
- - a function returning the number of option return values - getting them out of the program
- """
- self._handlers.append((options, load_fn, save_fn, default))
-
- def load (self):
- """
- Loads and applies all values of the session.
- """
- for options, lfn, sfn, default in self._handlers:
- try:
- loaded = [self._cfg.get(*x) for x in options]
- except KeyError: # does not exist -> ignore
- debug("No values for %s.", options)
- else:
- debug("Loading %s with values %s.", options, loaded)
- lfn(*loaded)
- continue
-
- if default:
- debug("Loading %s with defaults %s.", options, default)
- lfn(*default)
-
- def save (self):
- """
- Saves all options into the file.
- """
-
- for options, lfn, sfn, default in self._handlers:
- vals = sfn()
-
- # map into list if necessairy
- if not hasattr(vals, "__iter__"):
- vals = [vals]
- debug("Saving %s with values %s", options, vals)
-
- for value, (option, section) in zip(vals, options):
- self.set(option, str(value), section)
-
- self._cfg.write()
-
- def set (self, key, value, section):
- try:
- self._cfg.add(key, value, section, with_blankline = False)
- except SectionNotFoundException:
- self._cfg.add_section(section)
- self._cfg.add(key, value, section, with_blankline = False)
-
- def get (self, key, section):
- try:
- return self._cfg.get(key, section)
- except KeyError:
- return None
-
- def get_boolean (self, key, section):
- try:
- return self._cfg.get_boolean(key, section)
- except KeyError:
- return None
-
- def check_version (self, vers):
- pass # do nothing atm
+ """
+ A small class allowing to save certain states of a program.
+ This class works in a quite abstract manner, as it works with handlers, which
+ define what options to use out of the config file and how to apply them to the program.
+
+ Note: This class currently does not work with boolean config options. If you
+ want to define boolean values, use 0 and 1. This is future proof.
+ """
+
+ # the current session format version
+ VERSION = 1
+
+ def __init__ (self, file):
+ """
+ Initialize a session with a certain file inside L{SESSION_DIR}.
+
+ @param file: the file in L{SESSION_DIR}, where the options will be saved.
+ """
+
+ self._cfg = None
+ self._handlers = []
+
+ if not (os.path.exists(SESSION_DIR) and os.path.isdir(SESSION_DIR)):
+ os.mkdir(SESSION_DIR)
+ self._cfg = ConfigParser(os.path.join(SESSION_DIR, file))
+ info(_("Loading session from '%s'.") % self._cfg.file)
+ try:
+ self._cfg.parse()
+ except IOError, e:
+ if e.errno == 2: pass
+ else: raise
+
+ # add version check
+ self.add_handler(([("version", "session")], self.check_version, lambda: self.VERSION))
+
+ def add_handler (self, (options, load_fn, save_fn), default = None):
+ """
+ Adds a handler to this session. A handler is a three-tuple consisting of:
+ - a list of (key,section) values
+ - a function getting number of option arguments and applying them to the program
+ - a function returning the number of option return values - getting them out of the program
+ """
+ self._handlers.append((options, load_fn, save_fn, default))
+
+ def load (self):
+ """
+ Loads and applies all values of the session.
+ """
+ for options, lfn, sfn, default in self._handlers:
+ try:
+ loaded = [self._cfg.get(*x) for x in options]
+ except KeyError: # does not exist -> ignore
+ debug("No values for %s.", options)
+ else:
+ debug("Loading %s with values %s.", options, loaded)
+ lfn(*loaded)
+ continue
+
+ if default:
+ debug("Loading %s with defaults %s.", options, default)
+ lfn(*default)
+
+ def save (self):
+ """
+ Saves all options into the file.
+ """
+
+ for options, lfn, sfn, default in self._handlers:
+ vals = sfn()
+
+ # map into list if necessairy
+ if not hasattr(vals, "__iter__"):
+ vals = [vals]
+ debug("Saving %s with values %s", options, vals)
+
+ for value, (option, section) in zip(vals, options):
+ self.set(option, str(value), section)
+
+ self._cfg.write()
+
+ def set (self, key, value, section):
+ try:
+ self._cfg.add(key, value, section, with_blankline = False)
+ except SectionNotFoundException:
+ self._cfg.add_section(section)
+ self._cfg.add(key, value, section, with_blankline = False)
+
+ def get (self, key, section):
+ try:
+ return self._cfg.get(key, section)
+ except KeyError:
+ return None
+
+ def get_boolean (self, key, section):
+ try:
+ return self._cfg.get_boolean(key, section)
+ except KeyError:
+ return None
+
+ def check_version (self, vers):
+ pass # do nothing atm