36 lines
1008 B
Ruby
36 lines
1008 B
Ruby
# frozen_string_literal: true
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# This is meant to be used by plugins to trigger and listen to events
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# So we can execute code when things happen.
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class DiscourseEvent
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# Defaults to a hash where default values are empty sets.
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def self.events
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@events ||= Hash.new { |hash, key| hash[key] = Set.new }
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end
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def self.trigger(event_name, *args, **kwargs)
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events[event_name].each { |event| event.call(*args, **kwargs) }
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end
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def self.on(event_name, &block)
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if event_name == :site_setting_saved
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Discourse.deprecate(
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"The :site_setting_saved event is deprecated. Please use :site_setting_changed instead",
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since: "2.3.0beta8",
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drop_from: "2.4",
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raise_error: true,
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)
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end
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events[event_name] << block
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end
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def self.off(event_name, &block)
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raise ArgumentError.new "DiscourseEvent.off must reference a block" if block.nil?
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events[event_name].delete(block)
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end
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def self.all_off(event_name)
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events.delete(event_name)
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end
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end
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