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An asynchronous, graph-based execution engine
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lib/reactor/step/group/mermaid.ex
defmodule Reactor.Step.Group.Mermaid do
@moduledoc """
Mermaid rendering for `group` steps.
"""
alias Reactor.Mermaid.{Node, Reactor, Utils}
import Utils
@doc false
def to_mermaid(step, reactor, options) do
with {:ok, sub_graph} <- Reactor.to_mermaid(reactor, options),
{:ok, node} <- describe_step(step, options) do
inner_return_id = mermaid_id(reactor.id, :return)
links =
reactor.inputs
|> Enum.map(fn input ->
[node.id, "-->", mermaid_id({reactor.id, input}, :input), "\n"]
end)
|> Enum.concat([inner_return_id, "-->", node.id, "\n"])
{:ok, %{node | post: [sub_graph, node.post, links]}}
end
end
defp describe_step(%{impl: {module, opts}} = step, options) do
id = mermaid_id({options[:reactor_id], step.name}, :step)
content =
if options[:describe?] do
functions =
opts
|> Keyword.take([:before, :after])
|> Enum.sort_by(&elem(&1, 0))
|> Enum.reject(&is_nil(elem(&1, 1)))
|> Enum.map(fn {name, fun} ->
[
"- #{name}: _",
md_escape(inspect(fun)),
"_"
]
end)
|> Enum.intersperse(["\n"])
[
id,
"[\"`**",
md_escape(name(step.name)),
" \\(",
inspect(module),
"\\)**\n",
functions,
if(step.description, do: ["\n", md_escape(step.description)], else: []),
"`\"]\n"
]
else
[
id,
"[\"",
name(step.name),
"(",
inspect(module),
")\"]\n"
]
end
{:ok, %Node{id: id, pre: content}}
end
end