appobject.py
author Sylvain Thénault <sylvain.thenault@logilab.fr>
Wed, 16 Sep 2009 19:25:01 +0200
branch3.5
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"""Base class for dynamically loaded objects accessible through the vregistry.
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You'll also find some convenience classes to build selectors.
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:organization: Logilab
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:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
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:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
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:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
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"""
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__docformat__ = "restructuredtext en"
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import types
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from logging import getLogger
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from datetime import datetime, timedelta, time
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from logilab.common.decorators import classproperty
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from logilab.common.deprecation import deprecated
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from logilab.common.logging_ext import set_log_methods
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from rql.nodes import VariableRef, SubQuery
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from rql.stmts import Union, Select
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from cubicweb import Unauthorized, NoSelectableObject
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from cubicweb.utils import UStringIO, ustrftime, strptime, todate, todatetime
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ONESECOND = timedelta(0, 1, 0)
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CACHE_REGISTRY = {}
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class Cache(dict):
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    def __init__(self):
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        super(Cache, self).__init__()
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        _now = datetime.now()
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        self.cache_creation_date = _now
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        self.latest_cache_lookup = _now
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# selector base classes and operations ########################################
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def objectify_selector(selector_func):
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    """convenience decorator for simple selectors where a class definition
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    would be overkill::
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        @objectify_selector
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        def yes(cls, *args, **kwargs):
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            return 1
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    """
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    return type(selector_func.__name__, (Selector,),
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                {'__call__': lambda self, *args, **kwargs: selector_func(*args, **kwargs)})
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def _instantiate_selector(selector):
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    """ensures `selector` is a `Selector` instance
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    NOTE: This should only be used locally in build___select__()
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    XXX: then, why not do it ??
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    """
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    if isinstance(selector, types.FunctionType):
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        return objectify_selector(selector)()
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    if isinstance(selector, type) and issubclass(selector, Selector):
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        return selector()
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    return selector
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class Selector(object):
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    """base class for selector classes providing implementation
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    for operators ``&`` and ``|``
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    This class is only here to give access to binary operators, the
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    selector logic itself should be implemented in the __call__ method
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    a selector is called to help choosing the correct object for a
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    particular context by returning a score (`int`) telling how well
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    the class given as first argument apply to the given context.
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    0 score means that the class doesn't apply.
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    """
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    @property
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    def func_name(self):
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        # backward compatibility
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        return self.__class__.__name__
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    def search_selector(self, selector):
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        """search for the given selector or selector instance in the selectors
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        tree. Return it of None if not found
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        """
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        if self is selector:
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            return self
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        if isinstance(selector, type) and isinstance(self, selector):
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            return self
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        return None
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    def __str__(self):
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        return self.__class__.__name__
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    def __and__(self, other):
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        return AndSelector(self, other)
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    def __rand__(self, other):
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        return AndSelector(other, self)
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    def __or__(self, other):
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        return OrSelector(self, other)
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    def __ror__(self, other):
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        return OrSelector(other, self)
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    def __invert__(self):
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        return NotSelector(self)
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    # XXX (function | function) or (function & function) not managed yet
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    def __call__(self, cls, *args, **kwargs):
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        return NotImplementedError("selector %s must implement its logic "
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                                   "in its __call__ method" % self.__class__)
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   117
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   118
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class MultiSelector(Selector):
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    """base class for compound selector classes"""
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   121
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    def __init__(self, *selectors):
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        self.selectors = self.merge_selectors(selectors)
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   124
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    def __str__(self):
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   126
        return '%s(%s)' % (self.__class__.__name__,
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                           ','.join(str(s) for s in self.selectors))
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   128
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   129
    @classmethod
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    def merge_selectors(cls, selectors):
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        """deal with selector instanciation when necessary and merge
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        multi-selectors if possible:
0
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        AndSelector(AndSelector(sel1, sel2), AndSelector(sel3, sel4))
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        ==> AndSelector(sel1, sel2, sel3, sel4)
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   136
        """
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        merged_selectors = []
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        for selector in selectors:
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            try:
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                selector = _instantiate_selector(selector)
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   141
            except:
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                pass
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            #assert isinstance(selector, Selector), selector
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            if isinstance(selector, cls):
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                merged_selectors += selector.selectors
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   146
            else:
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                merged_selectors.append(selector)
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        return merged_selectors
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   149
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    def search_selector(self, selector):
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        """search for the given selector or selector instance in the selectors
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        tree. Return it of None if not found
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        """
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        for childselector in self.selectors:
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            if childselector is selector:
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                return childselector
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            found = childselector.search_selector(selector)
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   158
            if found is not None:
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   159
                return found
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        return None
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   161
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   162
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class AndSelector(MultiSelector):
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    """and-chained selectors (formerly known as chainall)"""
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    def __call__(self, cls, *args, **kwargs):
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        score = 0
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        for selector in self.selectors:
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            partscore = selector(cls, *args, **kwargs)
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            if not partscore:
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   170
                return 0
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            score += partscore
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        return score
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   173
1524
1d7575f5deaf delete-trailing-whitespaces
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   174
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class OrSelector(MultiSelector):
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    """or-chained selectors (formerly known as chainfirst)"""
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    def __call__(self, cls, *args, **kwargs):
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        for selector in self.selectors:
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            partscore = selector(cls, *args, **kwargs)
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            if partscore:
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   181
                return partscore
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   182
        return 0
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   183
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   184
class NotSelector(Selector):
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    """negation selector"""
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    def __init__(self, selector):
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        self.selector = selector
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   188
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    def __call__(self, cls, *args, **kwargs):
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        score = self.selector(cls, *args, **kwargs)
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   191
        return int(not score)
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   192
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   193
    def __str__(self):
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   194
        return 'NOT(%s)' % super(NotSelector, self).__str__()
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   195
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   196
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   197
class yes(Selector):
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    """return arbitrary score
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   199
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    default score of 0.5 so any other selector take precedence
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   201
    """
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    def __init__(self, score=0.5):
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   203
        self.score = score
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   204
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    def __call__(self, *args, **kwargs):
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   206
        return self.score
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   207
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   208
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   209
# the base class for all appobjects ############################################
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   210
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   211
class AppObject(object):
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   212
    """This is the base class for CubicWeb application objects which are
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   213
    selected according to a context (usually at least a request and a result
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   214
    set).
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   215
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   216
    Concrete application objects classes are designed to be loaded by the
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   217
    vregistry and should be accessed through it, not by direct instantiation.
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   218
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   219
    The following attributes should be set on concret appobject classes:
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   220
    :__registry__:
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      name of the registry for this object (string like 'views',
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   222
      'templates'...)
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   223
    :id:
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   224
      object's identifier in the registry (string like 'main',
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   225
      'primary', 'folder_box')
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   226
    :__select__:
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   227
      class'selector
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   228
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    Moreover, the `__abstract__` attribute may be set to True to indicate
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    that a appobject is abstract and should not be registered.
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    At registration time, the following attributes are set on the class:
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    :vreg:
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      the instance's registry
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    :schema:
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      the instance's schema
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    :config:
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      the instance's configuration
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    At selection time, the following attributes are set on the instance:
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    :req:
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      current request
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    :rset:
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      context result set or None
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    :row:
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      if a result set is set and the context is about a particular cell in the
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      result set, and not the result set as a whole, specify the row number we
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      are interested in, else None
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    :col:
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      if a result set is set and the context is about a particular cell in the
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      result set, and not the result set as a whole, specify the col number we
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      are interested in, else None
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    """
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    __registry__ = None
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    id = None
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    __select__ = yes()
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    @classmethod
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    def classid(cls):
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        """returns a unique identifier for the appobject"""
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        return '%s.%s' % (cls.__module__, cls.__name__)
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    # XXX bw compat code
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    @classmethod
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    def build___select__(cls):
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        for klass in cls.mro():
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            if klass.__name__ == 'AppObject':
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                continue # the bw compat __selector__ is there
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            klassdict = klass.__dict__
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            if ('__select__' in klassdict and '__selectors__' in klassdict
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                and '__selgenerated__' not in klassdict):
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                raise TypeError("__select__ and __selectors__ can't be used together on class %s" % cls)
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            if '__selectors__' in klassdict and '__selgenerated__' not in klassdict:
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                cls.__selgenerated__ = True
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                # case where __selectors__ is defined locally (but __select__
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                # is in a parent class)
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                selectors = klassdict['__selectors__']
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                if len(selectors) == 1:
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                    # micro optimization: don't bother with AndSelector if there's
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                    # only one selector
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                    select = _instantiate_selector(selectors[0])
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                else:
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                    select = AndSelector(*selectors)
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                cls.__select__ = select
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    @classmethod
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    def registered(cls, registry):
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        """called by the registry when the appobject has been registered.
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        It must return the object that will be actually registered (this may be
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        the right hook to create an instance for example). By default the
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        appobject is returned without any transformation.
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        """
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        cls.build___select__()
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        cls.vreg = registry.vreg
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        cls.schema = registry.schema
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        cls.config = registry.config
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        cls.register_properties()
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        return cls
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    @classmethod
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    def vreg_initialization_completed(cls):
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        pass
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    # Eproperties definition:
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    # key: id of the property (the actual CWProperty key is build using
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    #      <registry name>.<obj id>.<property id>
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    # value: tuple (property type, vocabfunc, default value, property description)
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    #        possible types are those used by `logilab.common.configuration`
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    #
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    # notice that when it exists multiple objects with the same id (adaptation,
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    # overriding) only the first encountered definition is considered, so those
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    # objects can't try to have different default values for instance.
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    property_defs = {}
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    @classmethod
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    def register_properties(cls):
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        for propid, pdef in cls.property_defs.items():
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            pdef = pdef.copy() # may be shared
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            pdef['default'] = getattr(cls, propid, pdef['default'])
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            pdef['sitewide'] = getattr(cls, 'site_wide', pdef.get('sitewide'))
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            cls.vreg.register_property(cls.propkey(propid), **pdef)
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    @classmethod
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    def propkey(cls, propid):
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        return '%s.%s.%s' % (cls.__registry__, cls.id, propid)
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    @classproperty
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    @deprecated('use __select__ and & or | operators')
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    def __selectors__(cls):
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        selector = cls.__select__
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        if isinstance(selector, AndSelector):
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            return tuple(selector.selectors)
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        if not isinstance(selector, tuple):
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            selector = (selector,)
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        return selector
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    def __init__(self, req=None, rset=None, row=None, col=None, **extra):
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        super(AppObject, self).__init__()
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        self.req = req
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        self.rset = rset
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        self.row = row
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        self.col = col
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        self.extra_kwargs = extra
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    def get_cache(self, cachename):
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   348
        """
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   349
        NOTE: cachename should be dotted names as in :
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   350
        - cubicweb.mycache
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parents: 1398
diff changeset
   351
        - cubes.blog.mycache
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   352
        - etc.
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   353
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   354
        if cachename in CACHE_REGISTRY:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   355
            cache = CACHE_REGISTRY[cachename]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   356
        else:
2098
13aab3775af7 [CWCache] fix CWCache validity test
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents: 2002
diff changeset
   357
            cache = CACHE_REGISTRY[cachename] = Cache()
1016
26387b836099 use datetime instead of mx.DateTime
sylvain.thenault@logilab.fr
parents: 875
diff changeset
   358
        _now = datetime.now()
26387b836099 use datetime instead of mx.DateTime
sylvain.thenault@logilab.fr
parents: 875
diff changeset
   359
        if _now > cache.latest_cache_lookup + ONESECOND:
1524
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sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   360
            ecache = self.req.execute('Any C,T WHERE C is CWCache, C name %(name)s, C timestamp T',
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   361
                                      {'name':cachename}).get_entity(0,0)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   362
            cache.latest_cache_lookup = _now
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   363
            if not ecache.valid(cache.cache_creation_date):
1130
17ff4d4bfbd0 should call clear, not empth (thanks pylint)
sylvain.thenault@logilab.fr
parents: 1129
diff changeset
   364
                cache.clear()
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   365
                cache.cache_creation_date = _now
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   366
        return cache
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   367
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   368
    def propval(self, propid):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   369
        assert self.req
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   370
        return self.req.property_value(self.propkey(propid))
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parents: 1398
diff changeset
   371
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   372
    def limited_rql(self):
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   373
        """return a printable rql for the result set associated to the object,
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   374
        with limit/offset correctly set according to maximum page size and
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   375
        currently displayed page when necessary
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   376
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   377
        # try to get page boundaries from the navigation component
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   378
        # XXX we should probably not have a ref to this component here (eg in
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   379
        #     cubicweb.common)
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   380
        nav = self.vreg['components'].select_object('navigation', self.req,
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   381
                                                    rset=self.rset)
0
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   382
        if nav:
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   383
            start, stop = nav.page_boundaries()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   384
            rql = self._limit_offset_rql(stop - start, start)
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Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   385
        # result set may have be limited manually in which case navigation won't
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   386
        # apply
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   387
        elif self.rset.limited:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   388
            rql = self._limit_offset_rql(*self.rset.limited)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   389
        # navigation component doesn't apply and rset has not been limited, no
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   390
        # need to limit query
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   391
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   392
            rql = self.rset.printable_rql()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   393
        return rql
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sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   394
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   395
    def _limit_offset_rql(self, limit, offset):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   396
        rqlst = self.rset.syntax_tree()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   397
        if len(rqlst.children) == 1:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   398
            select = rqlst.children[0]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   399
            olimit, ooffset = select.limit, select.offset
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   400
            select.limit, select.offset = limit, offset
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   401
            rql = rqlst.as_string(kwargs=self.rset.args)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   402
            # restore original limit/offset
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   403
            select.limit, select.offset = olimit, ooffset
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   404
        else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   405
            newselect = Select()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   406
            newselect.limit = limit
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   407
            newselect.offset = offset
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   408
            aliases = [VariableRef(newselect.get_variable(vref.name, i))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   409
                       for i, vref in enumerate(rqlst.selection)]
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   410
            newselect.set_with([SubQuery(aliases, rqlst)], check=False)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   411
            newunion = Union()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   412
            newunion.append(newselect)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   413
            rql = rqlst.as_string(kwargs=self.rset.args)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   414
            rqlst.parent = None
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   415
        return rql
1524
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sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   416
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   417
    def view(self, __vid, rset=None, __fallback_oid=None, __registry='views',
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   418
             **kwargs):
1985
9c1db4e06095 move view method's logic on the registry, so it's easier to call it from outside an appobject. Also make rset argument optional
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1984
diff changeset
   419
        """shortcut to self.vreg.view method avoiding to pass self.req"""
2650
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   420
        return self.vreg[__registry].render(__vid, self.req, __fallback_oid,
18aec79ec3a3 R [vreg] important refactoring of the vregistry, moving behaviour to end dictionnary (and so leaving room for more flexibility ; keep bw compat ; update api usage in cw
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2613
diff changeset
   421
                                            rset=rset, **kwargs)
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   422
1756
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   423
    def initialize_varmaker(self):
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   424
        varmaker = self.req.get_page_data('rql_varmaker')
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   425
        if varmaker is None:
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   426
            varmaker = self.req.varmaker
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   427
            self.req.set_page_data('rql_varmaker', varmaker)
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   428
        self.varmaker = varmaker
42d87dedd631 move initialize_varmaker impl to base app object
sylvain.thenault@logilab.fr
parents: 1723
diff changeset
   429
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   430
    # url generation methods ##################################################
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   431
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   432
    controller = 'view'
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   433
2059
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   434
    def build_url(self, *args, **kwargs):
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   435
        """return an absolute URL using params dictionary key/values as URL
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   436
        parameters. Values are automatically URL quoted, and the
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   437
        publishing method to use may be specified or will be guessed.
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   438
        """
2059
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   439
        # use *args since we don't want first argument to be "anonymous" to
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   440
        # avoid potential clash with kwargs
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   441
        if args:
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   442
            assert len(args) == 1, 'only 0 or 1 non-named-argument expected'
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   443
            method = args[0]
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   444
        else:
af33833d7571 absolute_url / build_url refactoring to avoid potential name clash
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2058
diff changeset
   445
            method = None
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   446
        # XXX I (adim) think that if method is passed explicitly, we should
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   447
        #     not try to process it and directly call req.build_url()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   448
        if method is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   449
            method = self.controller
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   450
            if method == 'view' and self.req.from_controller() == 'view' and \
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   451
                   not '_restpath' in kwargs:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   452
                method = self.req.relative_path(includeparams=False) or 'view'
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   453
        return self.req.build_url(method, **kwargs)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   454
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   455
    # various resources accessors #############################################
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   456
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   457
    def entity(self, row, col=0):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   458
        """short cut to get an entity instance for a particular row/column
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   459
        (col default to 0)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   460
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   461
        return self.rset.get_entity(row, col)
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   462
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   463
    def complete_entity(self, row, col=0, skip_bytes=True):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   464
        """short cut to get an completed entity instance for a particular
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   465
        row (all instance's attributes have been fetched)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   466
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   467
        entity = self.entity(row, col)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   468
        entity.complete(skip_bytes=skip_bytes)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   469
        return entity
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   470
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   471
    def user_rql_callback(self, args, msg=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   472
        """register a user callback to execute some rql query and return an url
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   473
        to call it ready to be inserted in html
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   474
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   475
        def rqlexec(req, rql, args=None, key=None):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   476
            req.execute(rql, args, key)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   477
        return self.user_callback(rqlexec, args, msg)
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   478
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   479
    def user_callback(self, cb, args, msg=None, nonify=False):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   480
        """register the given user callback and return an url to call it ready to be
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   481
        inserted in html
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   482
        """
1635
866563e2d0fc don't depends on simplejson outside web/
sylvain.thenault@logilab.fr
parents: 1524
diff changeset
   483
        from simplejson import dumps
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   484
        self.req.add_js('cubicweb.ajax.js')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   485
        cbname = self.req.register_onetime_callback(cb, *args)
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   486
        msg = dumps(msg or '')
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   487
        return "javascript:userCallbackThenReloadPage('%s', %s)" % (
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   488
            cbname, msg)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   489
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   490
    # formating methods #######################################################
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   491
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   492
    def tal_render(self, template, variables):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   493
        """render a precompiled page template with variables in the given
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   494
        dictionary as context
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   495
        """
1637
f5f6f25c2602 fix import
sylvain.thenault@logilab.fr
parents: 1635
diff changeset
   496
        from cubicweb.ext.tal import CubicWebContext
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   497
        context = CubicWebContext()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   498
        context.update({'self': self, 'rset': self.rset, '_' : self.req._,
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   499
                        'req': self.req, 'user': self.req.user})
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   500
        context.update(variables)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   501
        output = UStringIO()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   502
        template.expand(context, output)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   503
        return output.getvalue()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   504
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   505
    def format_date(self, date, date_format=None, time=False):
2476
1294a6bdf3bf application -> instance where it makes sense
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2144
diff changeset
   506
        """return a string for a date time according to instance's
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   507
        configuration
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   508
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   509
        if date:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   510
            if date_format is None:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   511
                if time:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   512
                    date_format = self.req.property_value('ui.datetime-format')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   513
                else:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   514
                    date_format = self.req.property_value('ui.date-format')
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   515
            return ustrftime(date, date_format)
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   516
        return u''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   517
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   518
    def format_time(self, time):
2476
1294a6bdf3bf application -> instance where it makes sense
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2144
diff changeset
   519
        """return a string for a time according to instance's
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   520
        configuration
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   521
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   522
        if time:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   523
            return ustrftime(time, self.req.property_value('ui.time-format'))
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   524
        return u''
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   525
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   526
    def format_float(self, num):
2476
1294a6bdf3bf application -> instance where it makes sense
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2144
diff changeset
   527
        """return a string for floating point number according to instance's
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   528
        configuration
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   529
        """
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   530
        if num:
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   531
            return self.req.property_value('ui.float-format') % num
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   532
        return u''
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   533
1984
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   534
    def parse_datetime(self, value, etype='Datetime'):
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   535
        """get a datetime or time from a string (according to etype)
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   536
        Datetime formatted as Date are accepted
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   537
        """
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   538
        assert etype in ('Datetime', 'Date', 'Time'), etype
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   539
        # XXX raise proper validation error
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   540
        if etype == 'Datetime':
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   541
            format = self.req.property_value('ui.datetime-format')
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   542
            try:
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   543
                return todatetime(strptime(value, format))
2002
031414d88003 be stricter on catched exception, fix Time parsing
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2001
diff changeset
   544
            except ValueError:
1984
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   545
                pass
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   546
        elif etype == 'Time':
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   547
            format = self.req.property_value('ui.time-format')
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   548
            try:
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   549
                # (adim) I can't find a way to parse a Time with a custom format
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   550
                date = strptime(value, format) # this returns a DateTime
2002
031414d88003 be stricter on catched exception, fix Time parsing
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2001
diff changeset
   551
                return time(date.hour, date.minute, date.second)
031414d88003 be stricter on catched exception, fix Time parsing
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2001
diff changeset
   552
            except ValueError:
1984
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   553
                raise ValueError('can\'t parse %r (expected %s)' % (value, format))
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   554
        try:
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   555
            format = self.req.property_value('ui.date-format')
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   556
            dt = strptime(value, format)
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   557
            if etype == 'Datetime':
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   558
                return todatetime(dt)
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   559
            return todate(dt)
2002
031414d88003 be stricter on catched exception, fix Time parsing
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2001
diff changeset
   560
        except ValueError:
1984
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   561
            raise ValueError('can\'t parse %r (expected %s)' % (value, format))
8d571df6012a move parse_datetime on appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 1977
diff changeset
   562
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   563
    # security related methods ################################################
1524
1d7575f5deaf delete-trailing-whitespaces
sylvain.thenault@logilab.fr
parents: 1398
diff changeset
   564
0
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   565
    def ensure_ro_rql(self, rql):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   566
        """raise an exception if the given rql is not a select query"""
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   567
        first = rql.split(' ', 1)[0].lower()
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   568
        if first in ('insert', 'set', 'delete'):
b97547f5f1fa Showtime !
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
diff changeset
   569
            raise Unauthorized(self.req._('only select queries are authorized'))
2657
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   570
de974465d381 [appobject] kill VObject class, move base selector classes to appobject
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents: 2656
diff changeset
   571
set_log_methods(AppObject, getLogger('cubicweb.appobject'))