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#
# This file is licensed under the Affero General Public License (AGPL) version 3.
#
# Copyright (C) 2023 New Vector, Ltd
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# See the GNU Affero General Public License for more details:
# <https://www.gnu.org/licenses/agpl-3.0.html>.
#
# Originally licensed under the Apache License, Version 2.0:
# <http://www.apache.org/licenses/LICENSE-2.0>.
#
# [This file includes modifications made by New Vector Limited]
#
#
import argparse
import datetime
import html
import json
import pydot
from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
from synapse.events import make_event_from_dict
from synapse.util.frozenutils import unfreeze
def make_graph(file_name: str, file_prefix: str, limit: int) -> None:
"""
Generate a dot and SVG file for a graph of events in the room based on the
topological ordering by reading line-delimited JSON from a file.
"""
print("Reading lines")
with open(file_name) as f:
lines = f.readlines()
print("Read lines")
# Figure out the room version, assume the first line is the create event.
room_version = KNOWN_ROOM_VERSIONS[
json.loads(lines[0]).get("content", {}).get("room_version")
]
events = [make_event_from_dict(json.loads(line), room_version) for line in lines]
print("Loaded events.")
events.sort(key=lambda e: e.depth)
print("Sorted events")
if limit:
events = events[-int(limit) :]
node_map = {}
graph = pydot.Dot(graph_name="Test")
for event in events:
t = datetime.datetime.fromtimestamp(
float(event.origin_server_ts) / 1000
).strftime("%Y-%m-%d %H:%M:%S,%f")
content = json.dumps(unfreeze(event.get_dict()["content"]), indent=4)
content = content.replace("\n", "<br/>\n")
print(content)
content = []
for key, value in unfreeze(event.get_dict()["content"]).items():
if value is None:
value = "<null>"
elif isinstance(value, str):
pass
else:
value = json.dumps(value)
content.append(
"<b>%s</b>: %s,"
% (
html.escape(key, quote=True).encode("ascii", "xmlcharrefreplace"),
html.escape(value, quote=True).encode("ascii", "xmlcharrefreplace"),
)
)
content = "<br/>\n".join(content)
print(content)
label = (
"<"
"<b>%(name)s </b><br/>"
"Type: <b>%(type)s </b><br/>"
"State key: <b>%(state_key)s </b><br/>"
"Content: <b>%(content)s </b><br/>"
"Time: <b>%(time)s </b><br/>"
"Depth: <b>%(depth)s </b><br/>"
">"
) % {
"name": event.event_id,
"type": event.type,
"state_key": event.get("state_key", None),
"content": content,
"time": t,
"depth": event.depth,
}
node = pydot.Node(name=event.event_id, label=label)
node_map[event.event_id] = node
graph.add_node(node)
print("Created Nodes")
for event in events:
for prev_id in event.prev_event_ids():
try:
end_node = node_map[prev_id]
except Exception:
end_node = pydot.Node(name=prev_id, label=f"<<b>{prev_id}</b>>")
node_map[prev_id] = end_node
graph.add_node(end_node)
edge = pydot.Edge(node_map[event.event_id], end_node)
graph.add_edge(edge)
print("Created edges")
graph.write("%s.dot" % file_prefix, format="raw", prog="dot")
print("Created Dot")
graph.write_svg("%s.svg" % file_prefix, prog="dot")
print("Created svg")
if __name__ == "__main__":
parser = argparse.ArgumentParser(
description="Generate a PDU graph for a given room by reading "
"from a file with line deliminated events. \n"
"Requires pydot."
)
parser.add_argument(
"-p",
"--prefix",
dest="prefix",
help="String to prefix output files with",
default="graph_output",
)
parser.add_argument("-l", "--limit", help="Only retrieve the last N events.")
parser.add_argument("event_file")
args = parser.parse_args()
make_graph(args.event_file, args.prefix, args.limit)
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