76 lines
2.4 KiB
Elixir
76 lines
2.4 KiB
Elixir
defmodule MfmParser.Parser do
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alias MfmParser.Token
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alias MfmParser.Node
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alias MfmParser.Lexer
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def parse(input, tree \\ [], is_end_token \\ fn _ -> false end) do
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case Lexer.next(input) do
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:eof ->
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tree
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{token, rest} ->
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if is_end_token.(token) do
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{tree, rest}
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else
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case token do
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%Token.MFM.Open{} ->
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{children, rest} = parse(rest, [], &is_mfm_close_token?/1)
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parse(
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rest,
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tree ++ [token |> get_node() |> Map.put(:children, children)],
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is_end_token
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)
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%Token.Text{} ->
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parse(
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rest,
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tree ++ [%Node.Text{props: %{text: token.content}}],
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is_end_token
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)
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%Token.Newline{} ->
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parse(
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rest,
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tree ++ [%Node.Newline{props: %{text: token.content}}],
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is_end_token
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)
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end
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end
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end
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end
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defp is_mfm_close_token?(token) do
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case token do
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%Token.MFM.Close{} -> true
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_ -> false
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end
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end
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defp get_node(token = %{content: content}) do
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cond do
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content =~ "$[flip" -> %Node.MFM.Flip{} |> fill_props(token)
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content =~ "$[font" -> %Node.MFM.Font{} |> fill_props(token)
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content =~ "$[x" -> %Node.MFM.X{} |> fill_props(token)
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content =~ "$[blur" -> %Node.MFM.Blur{} |> fill_props(token)
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content =~ "$[jelly" -> %Node.MFM.Jelly{} |> fill_props(token)
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content =~ "$[tada" -> %Node.MFM.Tada{} |> fill_props(token)
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content =~ "$[jump" -> %Node.MFM.Jump{} |> fill_props(token)
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content =~ "$[bounce" -> %Node.MFM.Bounce{} |> fill_props(token)
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content =~ "$[spin" -> %Node.MFM.Spin{} |> fill_props(token)
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content =~ "$[shake" -> %Node.MFM.Shake{} |> fill_props(token)
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content =~ "$[twitch" -> %Node.MFM.Twitch{} |> fill_props(token)
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content =~ "$[rainbow" -> %Node.MFM.Rainbow{} |> fill_props(token)
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content =~ "$[sparkle" -> %Node.MFM.Sparkle{} |> fill_props(token)
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content =~ "$[rotate" -> %Node.MFM.Rotate{} |> fill_props(token)
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true -> %Node.MFM.Undefined{} |> fill_props(token)
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end
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end
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defp fill_props(node = %{props: props}, %{content: content}) do
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new_props = props |> Map.merge(Token.MFM.to_props(content))
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node |> Map.merge(%{props: new_props})
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end
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end
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