#=======================================================================================================================
class TagDepth(object):
    def __init__(self):
        self.tag_depth = []

    def get_tree(self):
        val = ''
        for tag in self.tag_depth:
            val += (tag + '|')
        return val

    def rem(self):
        if len(self.tag_depth) > 0:
            del self.tag_depth[-1]

    def add(self, tag_name):
        self.tag_depth.append(tag_name)

#=======================================================================================================================

file_name = './poms/ws/pom.xml'

tag_ex = ['modelVersion', '?xml', 'packaging']

tag_found = False
row = col = 1
tag_name = pc = c = ''

tag_depth = TagDepth()
artifact = []
with open(file_name, encoding='utf8') as file:
    while True:
        pc, c = c, file.read(1)
        col += 1

        if c == '':
            break

        if c == '\n':
            row += 1
            col = 1
            continue

        if tag_found:
            if c == '/' and pc == '<':
                tag_found = False
                tag_depth.rem()
                continue
            elif c == '>':
                tag_found = False
                if len(tag_name) > 0 and not tag_name in tag_ex:
                    print(row, ' ', col, ' ',  tag_depth.get_tree() + tag_name)
                    tag_depth.add(tag_name)
                continue
            elif c != ' ':
                tag_name += c
            else:
                tag_found = False
                tag_depth.add(tag_name)

        if c == '<':
            tag_found = True
            tag_name = ''