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FIQL (Feed Item Query Language) parser and query build

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fiqlex lib query_builders selectors_getter.ex
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lib/query_builders/selectors_getter.ex 

defmodule FIQLEx.SelectorsGetter do

  use FIQLEx.QueryBuilder



  @impl true

  def init(_ast, _opts), do: []



  @impl true

  def build(_ast, selectors), do: {:ok, Enum.uniq(selectors)}



  @impl true

  def handle_or_expression(exp1, exp2, ast, state) do

    {:ok, handle_ast!(exp1, ast, state) ++ handle_ast!(exp2, ast, state)}

  end



  @impl true

  def handle_and_expression(exp1, exp2, ast, state) do

    {:ok, handle_ast!(exp1, ast, state) ++ handle_ast!(exp2, ast, state)}

  end



  @impl true

  def handle_expression(exp, ast, state), do: {:ok, handle_ast!(exp, ast, state)}



  @impl true

  def handle_selector(selector, _ast, selectors), do: {:ok, [selector | selectors]}



  @impl true

  def handle_selector_and_value(selector, _op, _value, _ast, selectors),

    do: {:ok, [selector | selectors]}



  @impl true

  def handle_selector_and_value_with_comparison(selector, _op, _value, _ast, selectors),

    do: {:ok, [selector | selectors]}

end