53 lines
1.2 KiB
Ruby
53 lines
1.2 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Graphql
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class Lazy
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include Gitlab::Utils::StrongMemoize
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def initialize(&block)
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@proc = block
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end
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def force
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strong_memoize(:force) { self.class.force(@proc.call) }
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end
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def then(&block)
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self.class.new { yield force }
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end
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def catch(error_class = StandardError, &block)
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self.class.new do
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force
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rescue error_class => e
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yield e
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end
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end
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# Force evaluation of a (possibly) lazy value
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def self.force(value)
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case value
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when ::Gitlab::Graphql::Lazy
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value.force
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when ::BatchLoader::GraphQL
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value.sync
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when ::Gitlab::Graphql::Deferred
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value.execute
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when ::GraphQL::Execution::Lazy
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value.value # part of the private api, but we can force this as well
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when ::Concurrent::Promise
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value.execute if value.state == :unscheduled
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value.value # value.value(10.seconds)
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else
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value
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end
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end
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def self.with_value(unforced, &block)
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self.new { unforced }.then(&block)
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end
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end
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end
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end
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