# hilfsfunktionen
import os.path
from types import *
import xml.dom.minidom

OSASObjectTypes=['OSAS_metaDataFile','OSAS_dir','OSAS_file','OSAS_imageFolder']
OSASExcludedFiles=['TheVolumeSettingsFolder','TheFindByContentFolder']

def getText(nodelist):
    """gibt text aus nodelist"""
    rc = ""
    for node in nodelist:
    	if node.nodeType == node.TEXT_NODE:
           rc = rc + node.data
    return rc

def getMetaFile(path):
    """get index.meta and translate it to HTML"""
    html=[]
    if not os.path.exists(path+"/index.meta"):
          
          return "NO_METADATA"
    else:
       f = os.popen("cat "+path+"/index.meta","r")
       lines = f.read()
       dom = xml.dom.minidom.parseString(lines)
       try:
           name=getText(dom.getElementsByTagName("name")[0].childNodes)
       except:
           name="NOT_DEFINED!!!"
       try:
           creator=getText(dom.getElementsByTagName("creator")[0].childNodes)
       except:
           creator="NOT_DEFINED!!!"

       try:
           creation_date=getText(dom.getElementsByTagName("archive-creation-date")[0].childNodes)
       except:
           creation_date="NOT_DEFINED!!!"

       try:
           description=getText(dom.getElementsByTagName("description")[0].childNodes)
       except:
           description="NOT_DEFINED!!!"
           
       try:
       	type=getText(dom.getElementsByTagName("content-type")[0].childNodes) 
       except:
        type=""
       if type=="scanned document":
		html="<h3>Document: "+name+"</h3>"
       elif type=="folder":
		html="<h3>Folder: "+name+"</h3>"
       else:
       		html="<h3>Document: "+name+"</h3>"

       html=html+"<p><i>created by: "+creator+" at: "+creation_date+"</i></p>" 
       html=html+"<h4>Description</h4><p>"+description+"</p>"
       try:
        bib = dom.getElementsByTagName("meta")[0].getElementsByTagName("bib")[0]
        if bib.attributes.has_key('type'):
	  html=html+"<h4>Info ("+bib.attributes['type'].value+")</h4>"
	else:
	  html=html+"<h4>Info</h4>"
        html=html+getBib(bib.childNodes)
        
       except:
        """none"""
       
#        html=html.encode('utf-8','replace')+getBib(bib.childNodes).encode('utf-8','replace')
       
       return html.encode('utf-8')

def getBib(nodelist):
    """ translate bibliographical entries """
    rc= "<table border='0'>"
    
    for node in nodelist:
        
    	if node.nodeType == node.ELEMENT_NODE:
	   """nothing"""
           
	   rc = rc+"<tr><td valign='right'>"+str(node.nodeName)+":</td><td> "+getText(node.childNodes)+"</td></tr>"
           
    #print rc
    return rc+"</table>"

def getPropertyOfDirs(path,property):
    """gibt Eigenschaften der directorys gemaess Index.metas file in path aus
    @param path: Pfad in dem das index.meta liegt
    @param propery: Property die ausgegebenwerden soll
    @return: Hash mit key  name des Directories and Value von property, None if error.
    """
    ret={}
    try:
        dom=xml.dom.minidom.parse(os.path.split(path)[0]+"/index.meta")
        for node in dom.getElementsByTagName("dir"):
            
            property= getText(node.getElementsByTagName("content-type")[0].childNodes)
            dirName=getText(node.getElementsByTagName("name")[0].childNodes)
            ret[dirName]=property
        return ret
    except:
                
        return ret

def dirHasProperty(path,propertyName,propertyValue):
    """gibt 1 zurück falls path hat propertyName und properName=propertyValue
    @param propertyName:Property von path in index.meta des parent folders von path
    @param propertyValue:Wert der Property
    @param path: Pfad der getestet werden soll
    """
    if getPropertyOfDirs(os.path.split(path)[0],propertyName).get(os.path.split(path)[1],None)==propertyValue:
        return 1
    else:
        return 0
    
def isImageFolder(path):
    """check if folder contains images without metadata or with metadata"""
    # metadaten ergeben imagefolder
    if dirHasProperty(path,'content-type','images'): 
        return 1
    
    #sonst rate ob folder images enthaelten durch test nach suffix
    try:
                dir=os.listdir(path)

                imagesuffixes=['.gif','.jpg','.jpeg','.png','.tiff','.tif']
                ret=""
                for a in dir:
                      
                      suffix=os.path.splitext(a)[1].lower()
		
                      if suffix in imagesuffixes:
                            return 1

                return 0

    except:
                return 0

def checkOSASFileType(object):
    """checke filetype
    nicht erkannte type auf werden auf none gesetzt
    """
    if os.path.split(object)[1][0]=="." or os.path.split(object)[1] in OSASExcludedFiles:
        return None
    elif isImageFolder(object):
        return 'OSAS_imageFolder'
    elif os.path.split(object)[1]=="index.meta":
        return 'OSAS_metaDataFile'
    elif os.path.isdir(object):
        return 'OSAS_dir'
    elif os.path.isfile(object):
        return 'OSAS_file'
 
def toList(fields):
    """Einzelfeld in Liste umwandeln
    @param fields: String oder Array
    @return: gibt liste zurueck

    """
    if type(fields)==StringType:
        return [fields]
    else:
        return fields


def localDate():
        """gives formatted local date"""
	return strftime("%d.%m.%Y",localtime())