Reuse of EitSupport as standalone application

[WolfgangFahl]

Thank you for your great software. I have been using an extract of your software for EIT parsing since 2016. I am now in the process of creating a standalone version and would love to make sure that the standalone version can stay in sync with your original code.

For python3 the byte handling seems to need to be modified. Please find my changes at:

https://github.com/WolfgangFahl/eitparser/blob/main/eit/eitparser.py

I'd appreciate some feedback whether the code could be changed to a common base class used by both projects. I'd like to avoid the dependencies

#from Components.config import config
#from Components.Language import language
#from EMCTasker import emcDebugOut
#from IsoFileSupport import IsoSupport

and for that only minor changes where necessary. I also added a main function and some static methods.

[dhwz]

This is not matching our current code, there is a lot of wrong and obsolete code in your code.

[WolfgangFahl]

I in the process of refactoring and suggest using something like:

class Event(object):
    
    def __init__(self,name):
        self.name=name
        self.descriptor = []
        
        self.descriptor_multi = []
        self.codepage = None
        
    def readDescription(self,data,pos,lenOfs,startOfs):
        '''
        read my description
        '''
        event_name_length = bord(data[pos+lenOfs])
        self.description= Bytes()
        for i in range (pos+startOfs,pos+startOfs+event_name_length):
            try:
                if str(bord(data[i]))=="10" or int(str(bord(data[i])))>31:
                    self.description.add(data[i])
            except IndexError as e:
                emcDebugOut("[META] Exception in readEitFile: " + str(e))
                
    def readCodePage(self,data,pos,startOfs):
        if not self.codepage:
            try:
                byte1 = str(bord(data[pos+startOfs]))
            except:
                byte1 = ''
            if byte1=="1": self.codepage = 'iso-8859-5'
            elif byte1=="2": self.codepage = 'iso-8859-6'
            elif byte1=="3": self.codepage = 'iso-8859-7'
            elif byte1=="4": self.codepage = 'iso-8859-8'
            elif byte1=="5": self.codepage = 'iso-8859-9'
            elif byte1=="6": self.codepage = 'iso-8859-10'
            elif byte1=="7": self.codepage = 'iso-8859-11'
            elif byte1=="9": self.codepage = 'iso-8859-13'
            elif byte1=="10": self.codepage = 'iso-8859-14'
            elif byte1=="11": self.codepage = 'iso-8859-15'
            elif byte1=="21": self.codepage = 'utf-8'
            if self.codepage:
                emcDebugOut("[META] Found name_event encoding-type: " + self.codepage)

please stay tuned for the next commit

[WolfgangFahl]

WolfgangFahl/eitparser@b72cc5e has a refactoring state that is close to what i am up to. It uses a Bytes and Event class and makes debugging simpler.

[WolfgangFahl]

https://pypi.org/project/eitparser/ version 0.0.1 is out now. It passes the testing against the 392 eit files from my Vu+ Duo²
I'd need a proper set of eit files for testing it with all possible encodings and there is lots more todo.