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ex_json_schema

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A JSON Schema validator with full support for the draft 4 specification and zero dependencies.

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ex_json_schema lib ex_json_schema validator dependencies.ex
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lib/ex_json_schema/validator/dependencies.ex 

defmodule ExJsonSchema.Validator.Dependencies do

  alias ExJsonSchema.Schema

  alias ExJsonSchema.Validator



  @spec validate(Root.t, Schema.resolved, ExJsonSchema.json) :: Validator.errors_with_list_paths

  def validate(root, dependencies, data) when is_map(data) do

    dependencies

    |> Enum.filter(&Map.has_key?(data, elem(&1, 0)))

    |> Enum.flat_map(fn {property, dependency} ->

      validate_dependency(root, property, dependency, data)

    end)

  end



  @spec validate(Root.t, Schema.resolved, ExJsonSchema.data) :: []

  def validate(_, _, _), do: []



  defp validate_dependency(root, _, schema, data) when is_map(schema) do

    Validator.validate(root, schema, data)

  end



  defp validate_dependency(_, property, dependencies, data) do

    Enum.flat_map List.wrap(dependencies), fn dependency ->

      case Map.has_key?(data, dependency) do

        true -> []

        false -> [{"Property #{property} depends on #{dependency} to be present but it was not.", []}]

      end

    end

  end

end