python-config-reader/listReader.py at master · diegoHr/python-config-reader · GitHub

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#!/usr/bin/python3
# -*- coding: utf8 -*-

'''
Created on 10 dic. 2016

@author: Diego Hernando Revenga
'''

class ListReader(object):
    '''
    classdocs
    '''


    def __init__(self, bufferFile):
        '''
        Constructor
        '''
        self._bufferFile=bufferFile

        self._listElements=self._readListElementsFromBuffer(bufferFile)

        self._listElementsToWrite=[]


    def _readListElementsFromBuffer(self,bufferFile):

        listLinesFile=bufferFile.readlines()
        listElements=[]

        index=0;
        for sLine in listLinesFile:
            if len(sLine.strip())>0:
                if sLine.strip()[0]!='#':
                    sLine=self._formatLine(sLine)
                    listElements.append(sLine)

            index=index+1
        return listElements

    def _formatLine(self, sLine):
        if (sLine[-1]=='\n'):
            sLine=sLine[0:-1]

        sFormatLine=''
        for index in range(len(sLine)-1):
            if ' ' != sLine[index] and '\t' != sLine[index]:
                sFormatLine=sLine[index:]
                break
        return sFormatLine


    def add(self,sElement):
        try:
            self._listElementsToWrite.append(sElement)
            self._listElements.append(sElement)
        except Exception as e:
            raise e

    def remove(self,sElement):
        try:
            self._listElements.remove(sElement)
            if sElement in self._listElementsToWrite:
                self._listElementsToWrite.remove(sElement)
        except Exception as e:
            raise e

    def get(self, index):
        return self._listElements[index]

    def getAll(self):
        return self._listElements

    def write(self):

        self._bufferFile.seek(0)
        iPos=self._bufferFile.seek(2)
        self._bufferFile.seek(iPos)

        sEndFile=self._bufferFile.read()
        if sEndFile !='\n':
            self._bufferFile.write('\n')

        for sElementToWrite in self._listElementsToWrite:
            self._bufferFile.write(sElementToWrite+'\n')

        self._bufferFile.flush()
        self._listElementsToWrite=[]


    def close(self):
        if not self._bufferFile.closed:
            self._bufferFile.close()

    def closed(self):
        return self._bufferFile.closed

    def __contains__(self,element):
        return element in self._listElements