FEATURE: Merge discourse-automation (#26432)

Automation (previously known as discourse-automation) is now a core plugin.

plugins/automation/lib/discourse_automation/triggerable.rb

@@ -0,0 +1,118 @@
+# frozen_string_literal: true
+
+module DiscourseAutomation
+  class Triggerable
+    attr_reader :fields, :name, :not_found, :settings, :automation
+
+    MANUAL_TRIGGER_KEY = :manual_trigger
+
+    def initialize(name, automation = nil)
+      @name = name
+      @placeholders = []
+      @fields = []
+      @settings = { MANUAL_TRIGGER_KEY => false }
+      @on_update_block = proc {}
+      @on_call_block = proc {}
+      @not_found = false
+      @validations = []
+      @automation = automation
+
+      eval! if @name
+    end
+
+    def id
+      "trigger"
+    end
+
+    def scriptable?
+      false
+    end
+
+    def triggerable?
+      true
+    end
+
+    def validate(&block)
+      @validations << block
+    end
+
+    def valid?(automation)
+      @validations.each { |block| automation.instance_exec(&block) }
+
+      automation.errors.blank?
+    end
+
+    def placeholders
+      @placeholders.uniq.compact.map(&:to_sym)
+    end
+
+    def placeholder(*args)
+      if args.present?
+        @placeholders << args[0]
+      elsif block_given?
+        @placeholders =
+          @placeholders.concat(Array(yield(@automation.serialized_fields, @automation)))
+      end
+    end
+
+    def field(name, component:, **options)
+      @fields << {
+        name: name,
+        component: component,
+        extra: {
+        },
+        accepts_placeholders: false,
+        accepted_contexts: [],
+        required: false,
+      }.merge(options || {})
+    end
+
+    def setting(key, value)
+      @settings[key] = value
+    end
+
+    def enable_manual_trigger
+      setting(MANUAL_TRIGGER_KEY, true)
+    end
+
+    def components
+      fields.map { |f| f[:component] }.uniq
+    end
+
+    def eval!
+      begin
+        public_send("__triggerable_#{name.underscore}")
+      rescue NoMethodError
+        @not_found = true
+      end
+
+      self
+    end
+
+    def on_call(&block)
+      if block_given?
+        @on_call_block = block
+      else
+        @on_call_block
+      end
+    end
+
+    def on_update(&block)
+      if block_given?
+        @on_update_block = block
+      else
+        @on_update_block
+      end
+    end
+
+    def self.add(identifier, &block)
+      @all_triggers = nil
+      define_method("__triggerable_#{identifier}", block || proc {})
+    end
+
+    def self.all
+      @all_triggers ||=
+        DiscourseAutomation::Triggerable.instance_methods(false).grep(/^__triggerable_/)
+    end
+  end
+end