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Online diagrams-Service supporting graphviz, mscgen and plantuml markup

Home Page: http://diagrams2.bitplan.com

License: Apache License 2.0

Python 49.75% HTML 40.82% Shell 9.43%

nicegui plantuml python

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diagrams's Issues

MediaWiki Diagrams compatible webservice

As a mediawiki user when using the extension:
https://www.mediawiki.org/wiki/Extension:Diagrams
this webservice should be capable of being used as
an endpoint for $wgDiagramsServiceUrl

make sure error message is shown if needed commands are not installed yet

convert project structure to pyproject.toml

Handle errors

if there is an error in generating a diagram it should be propagated to the wiki client with a proper json message.

allow for generation of other formats than png

png is currently hard coded

remember selected generator and output

the selected generator and output should stay

@startuml,@enduml

plantuml diagrams should be automatically wrapped as did the original plantuml extension

AttributeError: 'NoneType' object has no attribute 'generate'

I'm trying upgrading our Mediawiki installation from an old version to 1.35 LTS. GraphViz isn't maintained anymore, so I'm now using the plugin Diagrams. The Python application is running and I can draw diagrams directly from the build-in webgui. Only drawing a diagram from our Mediawiki installation doesn't work. Diagrams show the following error when I try to draw a diagram from Mediawiki:

[2022-02-08 13:28:14,315] ERROR in app: Exception on /render [POST]
Traceback (most recent call last):
 File "/usr/local/lib/python3.8/dist-packages/flask/app.py", line 2073, in wsgi_app
   response = self.full_dispatch_request()
 File "/usr/local/lib/python3.8/dist-packages/flask/app.py", line 1518, in full_dispatch_request
   rv = self.handle_user_exception(e)
 File "/usr/local/lib/python3.8/dist-packages/flask/app.py", line 1516, in full_dispatch_request
   rv = self.dispatch_request()
 File "/usr/local/lib/python3.8/dist-packages/flask/app.py", line 1502, in dispatch_request
   return self.ensure_sync(self.view_functions[rule.endpoint])(**req.view_args)
 File "dgs/webserver.py", line 68, in renderForWikiExtension
   result=gen.generate('dot',source,targetFormat)
AttributeError: 'NoneType' object has no attribute 'generate'

The diagram I tried to draw:

<graphviz>
   digraph G {
     rankdir = TD;
     edge [arrowhead=none];
     node [shape=box, color=lightblue2, style=filled];
     "dummy1"; "dummy2"; "dummy3";

     "dummy1" -> "dummy3" [label="100Mbps" fontsize="10"];
     "dummy1" -> "dummy3" [label="100Mbps" fontsize="10"];
     "dummy2" -> "dummy3" [label="100Mbps" fontsize="10"];
     "dummy2" -> "dummy3" [label="100Mbps" fontsize="10"];
   }
</graphviz>

LocalSettings.php:

wfLoadExtension('Diagrams');
$wgDiagramsServiceUrl = 'http://127.0.0.1:5003';

TIKZ code as result

Using TIKZ is the common way to draw pictures/diagrams with latex.
An output option would be very helpful.
Below is an example of an UML-Class diagram using the tikz-uml package, see overleaf example as well.

\begin{tikzpicture}
  \begin{umlpackage}{EquipmentProfile}
    \umlclass[]{Terminal}{conductedTo : ACLineSegment\\limit: Limit}{}
    \umlclass[x=-5, y=-3]{Limit}{value : double}{}
    \umlclass[x=+5, y=-3]{ACLineSegment}{}{}
    \umlclass[y=-5]{IdentifiedObject}{name : string\\mrid : IRI}{}
    
    \umlinherit[geometry=|-]{ACLineSegment}{IdentifiedObject}
    \umlinherit[geometry=|-]{Limit}{IdentifiedObject}
    \umlinherit[geometry=-|]{Terminal}{IdentifiedObject}
    
    \umlunicompo[mult=0..2, pos2=0.5]{Terminal}{ACLineSegment}
    \umlunicompo[mult=1]{Terminal}{Limit}
  \end{umlpackage}
\end{tikzpicture}

Renders to:

add command line arguments

the webservice debug, port and host should be specifiable via the command line

python3 dgs/webserver.py -h
usage: webserver.py [-h] [--debug] [--port PORT] [--host HOST]

Diagrams rendering webservice

optional arguments:
  -h, --help   show this help message and exit
  --debug      run in debug mode
  --port PORT  the port to use
  --host HOST  the host to serve for

Module dgs Not Found

Trying to run
python3 dgs/webserver.py
or
./run
in directory diagrams caused an error:

"File "dgs/webserver.py", line 9, in from dgs.diagrams import Generators, Generator, Example
ModuleNotFoundError: No module named 'dgs'"<

Could be solved by chagngin line 9 in webserver.py from
from dgs.diagrams import Generators, Generator, Example
to
from diagrams import Generators, Generator, Example