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35 lines
1.3 KiB
Elixir
35 lines
1.3 KiB
Elixir
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defmodule Search.TermRangeParser do
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# Unfortunately, we can't use NimbleParsec here. It requires
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# the compiler, and we're not in a macro environment.
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def parse(input, fields, default_field) do
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tokens =
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Enum.find_value(fields, fn {p, f} ->
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field(input, f, p)
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end)
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tokens || [{LiteralParser, default_field}, range: :eq, value: input]
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end
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defp field(input, field_name, field_parser) do
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field_sz = byte_size(field_name)
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case input do
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<<^field_name::binary-size(field_sz), ":", value::binary>> ->
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[{field_parser, field_name}, range: :eq, value: value]
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<<^field_name::binary-size(field_sz), ".eq:", value::binary>> ->
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[{field_parser, field_name}, range: :eq, value: value]
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<<^field_name::binary-size(field_sz), ".gt:", value::binary>> ->
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[{field_parser, field_name}, range: :gt, value: value]
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<<^field_name::binary-size(field_sz), ".gte:", value::binary>> ->
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[{field_parser, field_name}, range: :gte, value: value]
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<<^field_name::binary-size(field_sz), ".lt:", value::binary>> ->
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[{field_parser, field_name}, range: :lt, value: value]
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<<^field_name::binary-size(field_sz), ".lte:", value::binary>> ->
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[{field_parser, field_name}, range: :lte, value: value]
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_ ->
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nil
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end
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end
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end
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