
import time
from Cheetah.NameMapper import NotFound

class Error(Exception):
    pass

class ErrorCatcher:
    _exceptionsToCatch = (NotFound,)

    def __init__(self, templateObj):
        pass

    def exceptions(self):
        return self._exceptionsToCatch

    def warn(self, exc_val, code, rawCode, lineCol):
        return rawCode
## make an alias
Echo = ErrorCatcher

class BigEcho(ErrorCatcher):
    def warn(self, exc_val, code, rawCode, lineCol):
        return "="*15 + "&lt;" + rawCode + " could not be found&gt;" + "="*15

class KeyError(ErrorCatcher):
    def warn(self, exc_val, code, rawCode, lineCol):
        raise KeyError("no '%s' in this Template Object's Search List" % rawCode)

class ListErrors(ErrorCatcher):
    """Accumulate a list of errors."""
    _timeFormat = "%c"

    def __init__(self, templateObj):
        ErrorCatcher.__init__(self, templateObj)
        self._errors = []

    def warn(self, exc_val, code, rawCode, lineCol):
        dict = locals().copy()
        del dict['self']
        dict['time'] = time.strftime(self._timeFormat,
                                     time.localtime(time.time()))
        self._errors.append(dict)
        return rawCode

    def listErrors(self):
        """Return the list of errors."""
        return self._errors


