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# Copyright (C) 2005-2014 Bastian Kleineidam
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
A DOT graph format logger. The specification has been taken from
https://www.graphviz.org/doc/info/lang.html
"""
from .graph import _GraphLogger
class DOTLogger(_GraphLogger):
"""
Generates .dot sitemap graphs. Use graphviz to see the sitemap graph.
"""
LoggerName = "dot"
LoggerArgs = {
"filename": "linkchecker-out.dot",
"encoding": "ascii",
}
def start_output(self):
"""Write start of checking info as DOT comment."""
super().start_output()
if self.has_part("intro"):
self.write_intro()
self.writeln()
self.writeln("digraph G {")
self.writeln(" graph [")
self.writeln(" charset=\"%s\"," % self.get_charset_encoding())
self.writeln(" ];")
self.flush()
def comment(self, s, **args):
"""Write DOT comment."""
self.write("// ")
self.writeln(s=s, **args)
def log_url(self, url_data):
"""Write one node."""
node = self.get_node(url_data)
if node is not None:
self.writeln(' "%s" [' % dotquote(node["label"]))
if self.has_part("realurl"):
self.writeln(' href="%s",' % dotquote(node["url"]))
if node["dltime"] >= 0 and self.has_part("dltime"):
self.writeln(" dltime=%d," % node["dltime"])
if node["size"] >= 0 and self.has_part("dlsize"):
self.writeln(" size=%d," % node["size"])
if node["checktime"] and self.has_part("checktime"):
self.writeln(" checktime=%d," % node["checktime"])
if self.has_part("extern"):
self.writeln(" extern=%d," % node["extern"])
self.writeln(" ];")
def write_edge(self, node):
"""Write edge from parent to node."""
source = dotquote(self.nodes[node["parent_url"]]["label"])
target = dotquote(node["label"])
self.writeln(f' "{source}" -> "{target}" [')
self.writeln(f' label="{dotquote(node["edge"])}",')
if self.has_part("result"):
self.writeln(f' valid={node["valid"]},')
self.writeln(" ];")
def end_graph(self):
"""Write end of graph marker."""
self.writeln("}")
def dotquote(s):
"""Quote string for usage in DOT output format."""
return s.replace('"', '\\"')
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