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-module(mongoose_graphql_helper). |
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-export([null_to_default/2, null_to_undefined/1, undefined_to_null/1]). |
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-export([format_result/2, make_error/2, make_error/3]). |
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-include("mongoose_graphql_types.hrl"). |
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-spec format_result(InResult, Context) -> OutResult when |
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InResult :: {atom(), iodata() | integer()}, |
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Context :: map(), |
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OutResult :: {ok, binary() | integer()} | {error, resolver_error()}. |
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format_result(Result, Context) -> |
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case Result of |
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{ok, Val} when is_integer(Val) orelse is_map(Val) -> {ok, Val}; |
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{ok, Msg} -> {ok, iolist_to_binary(Msg)}; |
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{ErrCode, Msg} -> make_error(ErrCode, Msg, Context) |
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end. |
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-spec make_error({atom(), iodata()}, map()) -> {error, resolver_error()}. |
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make_error({Reason, Msg}, Context) -> |
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make_error(Reason, Msg, Context). |
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-spec make_error(atom(), iodata(), map()) -> {error, resolver_error()}. |
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make_error(Reason, Msg, Context) -> |
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{error, #resolver_error{reason = Reason, msg = iolist_to_binary(Msg), context = Context}}. |
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null_to_default(null, Default) -> |
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Default; |
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null_to_default(Value, _Default) -> |
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Value. |
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null_to_undefined(null) -> undefined; |
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null_to_undefined(V) -> V. |
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undefined_to_null(undefined) -> null; |
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undefined_to_null(V) -> V. |