Malformed subgraph name in Mermaid render

[pieterb]

Expected

For a group named identity provider (IDP) in the DSL, I expect valid Mermaid output.

Actual

The generated mmd contains:

subgraph group1 [identity provider (IdP)]
    ...
end

Mermaid chokes on this because of the parentheses "()".

Steps to reproduce

create the following dsl:

workspace {
    model {
        ss = softwareSystem "MySoftware" {
            group "identity provider (IdP)" {
                keycloak = container "KeyCloak"
            }
        }
    }
}

Export it to Mermaid, then try to render output file structurizr-Container-001.mmd.

Version/build information

structurizr-cli: 2024.07.03
structurizr-java: 2.2.0
structurizr-dsl: 2.2.0
structurizr-export: 2.2.0
structurizr-import: v2.2.0
Java: 22.0.2/Homebrew (/usr/local/Cellar/openjdk/22.0.2/libexec/openjdk.jdk/Contents/Home)
OS: Mac OS X 13.6.9 (x86_64)

Severity

Major

Priority

I have no budget and there's no rush, please fix this for free

More information

It would be safer to put the group name in quotes, as in:

subgraph group1 ["identity provider (IdP)"]
    ...
end

More in general, quoting and escaping for Mermaid could be improved, not only for groups, but for all elements.