# -*- coding: utf-8 -*-

# Copyright (c) 2017 Detlev Offenbach <detlev@die-offenbachs.de>
#

"""
Module to read the web browser spell check dictionaries list file.
"""

from __future__ import unicode_literals

from .Config import dictionariesListFileFormatVersion
from .XMLStreamReaderBase import XMLStreamReaderBase

import Preferences


class SpellCheckDictionariesReader(XMLStreamReaderBase):
    """
    Class to read the web browser spell check dictionaries list file.
    """
    supportedVersions = ["1.0", ]
    
    def __init__(self, data, entryCallback):
        """
        Constructor
        
        @param data reference to the data array to read XML from (QByteArray)
        @param entryCallback reference to a function to be called once the
            data for a dictionary has been read (function)
        """
        XMLStreamReaderBase.__init__(self, data)
        
        self.__entryCallback = entryCallback
        
        self.version = ""
        self.baseUrl = ""
    
    def readXML(self):
        """
        Public method to read and parse the XML document.
        """
        while not self.atEnd():
            self.readNext()
            if self.isStartElement():
                if self.name() == "Dictionaries":
                    self.version = self.attribute(
                        "version",
                        dictionariesListFileFormatVersion)
                    self.baseUrl = self.attribute("baseurl", "")
                    if self.version not in self.supportedVersions:
                        self.raiseUnsupportedFormatVersion(self.version)
                elif self.name() == "DictionariesUrl":
                    url = self.readElementText()
                    Preferences.setWebBrowser("SpellCheckDictionariesUrl", url)
                elif self.name() == "Dictionary":
                    self.__readDictionary()
                else:
                    self._skipUnknownElement()
        
        self.showErrorMessage()
    
    def __readDictionary(self):
        """
        Private method to read the plug-in info.
        """
        dictionaryInfo = {"short": "",
                          "filename": "",
                          "documentation": "",
                          "locales": [],
                          }
        
        while not self.atEnd():
            self.readNext()
            if self.isEndElement() and self.name() == "Dictionary":
                self.__entryCallback(
                    dictionaryInfo["short"], dictionaryInfo["filename"],
                    self.baseUrl + dictionaryInfo["filename"],
                    dictionaryInfo["documentation"], dictionaryInfo["locales"])
                break
            
            if self.isStartElement():
                if self.name() == "Short":
                    dictionaryInfo["short"] = self.readElementText()
                elif self.name() == "Filename":
                    dictionaryInfo["filename"] = self.readElementText()
                elif self.name() == "Documentation":
                    dictionaryInfo["documentation"] = self.readElementText()
                elif self.name() == "Locales":
                    dictionaryInfo["locales"] = self.readElementText().split()
                else:
                    self.raiseUnexpectedStartTag(self.name())
