98 lines
3.5 KiB
Elixir
98 lines
3.5 KiB
Elixir
defmodule RDF.Serialization.ParseHelper do
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@moduledoc false
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alias RDF.IRI
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@rdf_type RDF.Utils.Bootstrapping.rdf_iri("type")
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def rdf_type, do: @rdf_type
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def to_iri_string({:iriref, _line, value}), do: value |> iri_unescape
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def to_iri({:iriref, line, value}) do
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with iri = RDF.iri(iri_unescape(value)) do
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if IRI.valid?(iri) do
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{:ok, iri}
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else
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{:error, line, "#{value} is not a valid IRI"}
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end
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end
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end
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def to_absolute_or_relative_iri({:iriref, _line, value}) do
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with iri = RDF.iri(iri_unescape(value)) do
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if IRI.absolute?(iri) do
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iri
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else
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{:relative_iri, value}
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end
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end
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end
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def to_bnode({:blank_node_label, _line, value}), do: RDF.bnode(value)
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def to_bnode({:anon, _line}), do: RDF.bnode
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def to_literal({:string_literal_quote, _line, value}),
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do: value |> string_unescape |> RDF.literal
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def to_literal({:integer, _line, value}), do: RDF.literal(value)
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def to_literal({:decimal, _line, value}), do: RDF.literal(value)
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def to_literal({:double, _line, value}), do: RDF.literal(value)
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def to_literal({:boolean, _line, value}), do: RDF.literal(value)
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def to_literal({:string_literal_quote, _line, value}, {:language, language}),
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do: value |> string_unescape |> RDF.literal(language: language)
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def to_literal({:string_literal_quote, _line, value}, {:datatype, %IRI{} = type}),
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do: value |> string_unescape |> RDF.literal(datatype: type)
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def to_literal(string_literal_quote_ast, type),
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do: {string_literal_quote_ast, type}
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def integer(value), do: RDF.XSD.Integer.new(List.to_string(value))
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def decimal(value), do: RDF.XSD.Decimal.new(List.to_string(value))
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def double(value), do: RDF.XSD.Double.new(List.to_string(value))
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def boolean('true'), do: true
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def boolean('false'), do: false
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def to_langtag({:langtag, _line, value}), do: value
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def to_langtag({:"@prefix", 1}), do: "prefix"
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def to_langtag({:"@base", 1}), do: "base"
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def bnode_str('_:' ++ value), do: List.to_string(value)
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def langtag_str('@' ++ value), do: List.to_string(value)
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def quoted_content_str(value), do: value |> List.to_string |> String.slice(1..-2)
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def long_quoted_content_str(value), do: value |> List.to_string |> String.slice(3..-4)
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def prefix_ns(value), do: value |> List.to_string |> String.slice(0..-2)
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def prefix_ln(value), do: value |> List.to_string |> String.split(":", parts: 2) |> List.to_tuple
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def string_unescape(string),
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do: string |> unescape_8digit_unicode_seq |> Macro.unescape_string(&string_unescape_map(&1))
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def iri_unescape(string),
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do: string |> unescape_8digit_unicode_seq |> Macro.unescape_string(&iri_unescape_map(&1))
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defp string_unescape_map(?b), do: ?\b
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defp string_unescape_map(?f), do: ?\f
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defp string_unescape_map(?n), do: ?\n
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defp string_unescape_map(?r), do: ?\r
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defp string_unescape_map(?t), do: ?\t
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defp string_unescape_map(?u), do: true
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defp string_unescape_map(:unicode), do: true
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defp string_unescape_map(e), do: e
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defp iri_unescape_map(?u), do: true
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defp iri_unescape_map(:unicode), do: true
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defp iri_unescape_map(e), do: e
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def unescape_8digit_unicode_seq(string) do
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String.replace(string, ~r/\\U([0-9]|[A-F]|[a-f]){2}(([0-9]|[A-F]|[a-f]){6})/, "\\u{\\2}")
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end
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def error_description(error_descriptor) when is_list(error_descriptor) do
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error_descriptor
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|> Stream.map(&to_string/1)
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|> Enum.join("")
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end
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def error_description(error_descriptor), do: inspect(error_descriptor)
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end
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