163 lines
4.3 KiB
Python
163 lines
4.3 KiB
Python
# Nemubot is a smart and modulable IM bot.
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# Copyright (C) 2012-2016 Mercier Pierre-Olivier
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import xml.parsers.expat
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from nemubot.tools.xmlparser import node as module_state
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class ModuleStatesFile:
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def __init__(self):
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self.root = None
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self.stack = list()
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def startElement(self, name, attrs):
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cur = module_state.ModuleState(name)
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for name in attrs.keys():
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cur.setAttribute(name, attrs[name])
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self.stack.append(cur)
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def characters(self, content):
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self.stack[len(self.stack)-1].content += content
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def endElement(self, name):
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child = self.stack.pop()
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size = len(self.stack)
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if size > 0:
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self.stack[size - 1].content = self.stack[size - 1].content.strip()
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self.stack[size - 1].addChild(child)
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else:
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self.root = child
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class XMLParser:
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def __init__(self, knodes):
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self.knodes = knodes
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self.stack = list()
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self.child = 0
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def parse_file(self, path):
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p = xml.parsers.expat.ParserCreate()
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p.StartElementHandler = self.startElement
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p.CharacterDataHandler = self.characters
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p.EndElementHandler = self.endElement
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with open(path, "rb") as f:
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p.ParseFile(f)
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return self.root
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def parse_string(self, s):
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p = xml.parsers.expat.ParserCreate()
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p.StartElementHandler = self.startElement
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p.CharacterDataHandler = self.characters
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p.EndElementHandler = self.endElement
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p.Parse(s, 1)
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return self.root
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@property
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def root(self):
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if len(self.stack):
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return self.stack[0]
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else:
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return None
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@property
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def current(self):
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if len(self.stack):
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return self.stack[-1]
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else:
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return None
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def display_stack(self):
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return " in ".join([str(type(s).__name__) for s in reversed(self.stack)])
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def startElement(self, name, attrs):
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if not self.current or not hasattr(self.current, "startElement") or not self.current.startElement(name, attrs):
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if name not in self.knodes:
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raise TypeError(name + " is not a known type to decode")
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else:
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self.stack.append(self.knodes[name](**attrs))
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else:
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self.child += 1
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def characters(self, content):
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if self.current and hasattr(self.current, "characters"):
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self.current.characters(content)
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def endElement(self, name):
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if self.child:
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self.child -= 1
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if hasattr(self.current, "endElement"):
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self.current.endElement(name)
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return
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if hasattr(self.current, "endElement"):
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self.current.endElement(None)
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# Don't remove root
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if len(self.stack) > 1:
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last = self.stack.pop()
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if hasattr(self.current, "addChild"):
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if self.current.addChild(name, last):
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return
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raise TypeError(name + " tag not expected in " + self.display_stack())
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def parse_file(filename):
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p = xml.parsers.expat.ParserCreate()
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mod = ModuleStatesFile()
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p.StartElementHandler = mod.startElement
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p.EndElementHandler = mod.endElement
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p.CharacterDataHandler = mod.characters
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with open(filename, "rb") as f:
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p.ParseFile(f)
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return mod.root
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def parse_string(string):
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p = xml.parsers.expat.ParserCreate()
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mod = ModuleStatesFile()
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p.StartElementHandler = mod.startElement
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p.EndElementHandler = mod.endElement
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p.CharacterDataHandler = mod.characters
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p.Parse(string, 1)
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return mod.root
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