class BonsaiParser:
    def __init__(self, bonsaiURL):
        self.dom = minidom.parse(urlopen(bonsaiURL))
        nodes = self.dom.getElementsByTagName("ci")
        if nodes.length < 1:
            return

        self.currentCiNode = nodes[0]
        self.currentFileNode = self.firstFileNode()

    def hasData(self):
        if self.currentCiNode:
            return True
        else:
            return False

    def nextCiNode(self):
        self.currentCiNode = self.currentCiNode.nextSibling
        if self.currentCiNode:
            return True
        else:
            return False

    def getLog(self):
        log = ""
        for child in self.currentCiNode.childNodes:
            if child.nodeType == Node.ELEMENT_NODE and child.tagName == "log":
                log = child.firstChild.data
        return log

    def firstFileNode(self):
        for child in self.currentCiNode.childNodes:
            if child.nodeType == Node.ELEMENT_NODE and child.tagName == "files":
                for c in child.childNodes:
                    if c.nodeType == Node.ELEMENT_NODE and c.tagName == "f":
                        return c

    def nextFileNode(self):
        # every other sibling is a <f>, so go two past the current one
        try:
            self.currentFileNode = self.currentFileNode.nextSibling.nextSibling
        except AttributeError:
            self.currentFileNode = None
        if self.currentFileNode:
            return True
        else:
            return False

    def hasFile(self):
        if self.currentFileNode:
            return True
        else:
            return False

    def getFile(self):
        return self.currentFileNode.firstChild.data