1# -*- coding: utf-8 -*-
2"""
3    jinja2.exceptions
4    ~~~~~~~~~~~~~~~~~
5
6    Jinja exceptions.
7
8    :copyright: (c) 2010 by the Jinja Team.
9    :license: BSD, see LICENSE for more details.
10"""
11from jinja2._compat import imap, text_type, PY2, implements_to_string
12
13
14class TemplateError(Exception):
15    """Baseclass for all template errors."""
16
17    if PY2:
18        def __init__(self, message=None):
19            if message is not None:
20                message = text_type(message).encode('utf-8')
21            Exception.__init__(self, message)
22
23        @property
24        def message(self):
25            if self.args:
26                message = self.args[0]
27                if message is not None:
28                    return message.decode('utf-8', 'replace')
29
30        def __unicode__(self):
31            return self.message or u''
32    else:
33        def __init__(self, message=None):
34            Exception.__init__(self, message)
35
36        @property
37        def message(self):
38            if self.args:
39                message = self.args[0]
40                if message is not None:
41                    return message
42
43
44@implements_to_string
45class TemplateNotFound(IOError, LookupError, TemplateError):
46    """Raised if a template does not exist."""
47
48    # looks weird, but removes the warning descriptor that just
49    # bogusly warns us about message being deprecated
50    message = None
51
52    def __init__(self, name, message=None):
53        IOError.__init__(self)
54        if message is None:
55            message = name
56        self.message = message
57        self.name = name
58        self.templates = [name]
59
60    def __str__(self):
61        return self.message
62
63
64class TemplatesNotFound(TemplateNotFound):
65    """Like :class:`TemplateNotFound` but raised if multiple templates
66    are selected.  This is a subclass of :class:`TemplateNotFound`
67    exception, so just catching the base exception will catch both.
68
69    .. versionadded:: 2.2
70    """
71
72    def __init__(self, names=(), message=None):
73        if message is None:
74            message = u'none of the templates given were found: ' + \
75                      u', '.join(imap(text_type, names))
76        TemplateNotFound.__init__(self, names and names[-1] or None, message)
77        self.templates = list(names)
78
79
80@implements_to_string
81class TemplateSyntaxError(TemplateError):
82    """Raised to tell the user that there is a problem with the template."""
83
84    def __init__(self, message, lineno, name=None, filename=None):
85        TemplateError.__init__(self, message)
86        self.lineno = lineno
87        self.name = name
88        self.filename = filename
89        self.source = None
90
91        # this is set to True if the debug.translate_syntax_error
92        # function translated the syntax error into a new traceback
93        self.translated = False
94
95    def __str__(self):
96        # for translated errors we only return the message
97        if self.translated:
98            return self.message
99
100        # otherwise attach some stuff
101        location = 'line %d' % self.lineno
102        name = self.filename or self.name
103        if name:
104            location = 'File "%s", %s' % (name, location)
105        lines = [self.message, '  ' + location]
106
107        # if the source is set, add the line to the output
108        if self.source is not None:
109            try:
110                line = self.source.splitlines()[self.lineno - 1]
111            except IndexError:
112                line = None
113            if line:
114                lines.append('    ' + line.strip())
115
116        return u'\n'.join(lines)
117
118
119class TemplateAssertionError(TemplateSyntaxError):
120    """Like a template syntax error, but covers cases where something in the
121    template caused an error at compile time that wasn't necessarily caused
122    by a syntax error.  However it's a direct subclass of
123    :exc:`TemplateSyntaxError` and has the same attributes.
124    """
125
126
127class TemplateRuntimeError(TemplateError):
128    """A generic runtime error in the template engine.  Under some situations
129    Jinja may raise this exception.
130    """
131
132
133class UndefinedError(TemplateRuntimeError):
134    """Raised if a template tries to operate on :class:`Undefined`."""
135
136
137class SecurityError(TemplateRuntimeError):
138    """Raised if a template tries to do something insecure if the
139    sandbox is enabled.
140    """
141
142
143class FilterArgumentError(TemplateRuntimeError):
144    """This error is raised if a filter was called with inappropriate
145    arguments
146    """
147