291 lines
9.2 KiB
Ruby
291 lines
9.2 KiB
Ruby
# frozen_string_literal: true
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class AiPersona < ActiveRecord::Base
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# TODO remove this line 01-11-2024
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self.ignored_columns = [:commands]
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# places a hard limit, so per site we cache a maximum of 500 classes
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MAX_PERSONAS_PER_SITE = 500
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validates :name, presence: true, uniqueness: true, length: { maximum: 100 }
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validates :description, presence: true, length: { maximum: 2000 }
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validates :system_prompt, presence: true, length: { maximum: 10_000_000 }
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validate :system_persona_unchangeable, on: :update, if: :system
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validate :chat_preconditions
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validates :max_context_posts, numericality: { greater_than: 0 }, allow_nil: true
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# leaves some room for growth but sets a maximum to avoid memory issues
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# we may want to revisit this in the future
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validates :vision_max_pixels, numericality: { greater_than: 0, maximum: 4_000_000 }
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validates :rag_chunk_tokens, numericality: { greater_than: 0, maximum: 50_000 }
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validates :rag_chunk_overlap_tokens, numericality: { greater_than: -1, maximum: 200 }
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validates :rag_conversation_chunks, numericality: { greater_than: 0, maximum: 1000 }
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has_many :rag_document_fragments, dependent: :destroy, as: :target
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belongs_to :created_by, class_name: "User"
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belongs_to :user
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has_many :upload_references, as: :target, dependent: :destroy
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has_many :uploads, through: :upload_references
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before_destroy :ensure_not_system
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before_update :regenerate_rag_fragments
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def self.persona_cache
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@persona_cache ||= ::DiscourseAi::MultisiteHash.new("persona_cache")
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end
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scope :ordered, -> { order("priority DESC, lower(name) ASC") }
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def self.all_personas
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persona_cache[:value] ||= AiPersona
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.ordered
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.where(enabled: true)
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.all
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.limit(MAX_PERSONAS_PER_SITE)
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.map(&:class_instance)
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end
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def self.persona_users(user: nil)
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persona_users =
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persona_cache[:persona_users] ||= AiPersona
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.where(enabled: true)
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.joins(:user)
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.pluck(
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"ai_personas.id, users.id, users.username_lower, allowed_group_ids, default_llm, mentionable, allow_chat",
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)
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.map do |id, user_id, username, allowed_group_ids, default_llm, mentionable, allow_chat|
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{
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id: id,
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user_id: user_id,
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username: username,
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allowed_group_ids: allowed_group_ids,
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default_llm: default_llm,
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mentionable: mentionable,
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allow_chat: allow_chat,
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}
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end
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if user
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persona_users.select { |mentionable| user.in_any_groups?(mentionable[:allowed_group_ids]) }
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else
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persona_users
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end
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end
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def self.allowed_chat(user: nil)
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personas = persona_cache[:allowed_chat] ||= persona_users.select { |u| u[:allow_chat] }
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if user
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personas.select { |u| user.in_any_groups?(u[:allowed_group_ids]) }
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else
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personas
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end
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end
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def self.mentionables(user: nil)
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all_mentionables =
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persona_cache[:mentionables] ||= persona_users.select do |mentionable|
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mentionable[:mentionable]
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end
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if user
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all_mentionables.select { |mentionable| user.in_any_groups?(mentionable[:allowed_group_ids]) }
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else
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all_mentionables
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end
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end
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after_commit :bump_cache
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def bump_cache
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self.class.persona_cache.flush!
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end
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def class_instance
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attributes = %i[
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id
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user_id
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system
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mentionable
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default_llm
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max_context_posts
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vision_enabled
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vision_max_pixels
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rag_conversation_chunks
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question_consolidator_llm
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allow_chat
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name
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description
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allowed_group_ids
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tool_details
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]
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persona_class = DiscourseAi::AiBot::Personas::Persona.system_personas_by_id[self.id]
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instance_attributes = {}
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attributes.each do |attr|
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value = self.read_attribute(attr)
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instance_attributes[attr] = value
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end
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if persona_class
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instance_attributes.each do |key, value|
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# description/name are localized
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persona_class.define_singleton_method(key) { value } if key != :description && key != :name
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end
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return persona_class
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end
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options = {}
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tools =
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self.tools.filter_map do |element|
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klass = nil
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if element.is_a?(String) && element.start_with?("custom-")
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custom_tool_id = element.split("-", 2).last.to_i
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if AiTool.exists?(id: custom_tool_id, enabled: true)
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klass = DiscourseAi::AiBot::Tools::Custom.class_instance(custom_tool_id)
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end
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else
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inner_name, current_options = element.is_a?(Array) ? element : [element, nil]
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inner_name = inner_name.gsub("Tool", "")
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inner_name = "List#{inner_name}" if %w[Categories Tags].include?(inner_name)
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begin
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klass = "DiscourseAi::AiBot::Tools::#{inner_name}".constantize
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options[klass] = current_options if current_options
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rescue StandardError
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end
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klass
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end
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end
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ai_persona_id = self.id
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Class.new(DiscourseAi::AiBot::Personas::Persona) do
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instance_attributes.each { |key, value| define_singleton_method(key) { value } }
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define_singleton_method(:to_s) do
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"#<#{self.class.name} @name=#{name} @allowed_group_ids=#{allowed_group_ids.join(",")}>"
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end
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define_singleton_method(:inspect) { to_s }
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define_method(:initialize) do |*args, **kwargs|
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@ai_persona = AiPersona.find_by(id: ai_persona_id)
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super(*args, **kwargs)
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end
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define_method(:tools) { tools }
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define_method(:options) { options }
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define_method(:temperature) { @ai_persona&.temperature }
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define_method(:top_p) { @ai_persona&.top_p }
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define_method(:system_prompt) { @ai_persona&.system_prompt || "You are a helpful bot." }
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define_method(:uploads) { @ai_persona&.uploads }
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end
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end
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FIRST_PERSONA_USER_ID = -1200
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def create_user!
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raise "User already exists" if user_id && User.exists?(user_id)
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# find the first id smaller than FIRST_USER_ID that is not taken
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id = nil
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id = DB.query_single(<<~SQL, FIRST_PERSONA_USER_ID, FIRST_PERSONA_USER_ID - 200).first
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WITH seq AS (
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SELECT generate_series(?, ?, -1) AS id
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)
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SELECT seq.id FROM seq
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LEFT JOIN users ON users.id = seq.id
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WHERE users.id IS NULL
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ORDER BY seq.id DESC
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SQL
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id = DB.query_single(<<~SQL).first if id.nil?
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SELECT min(id) - 1 FROM users
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SQL
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# note .invalid is a reserved TLD which will route nowhere
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user =
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User.new(
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email: "#{SecureRandom.hex}@does-not-exist.invalid",
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name: name.titleize,
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username: UserNameSuggester.suggest(name + "_bot"),
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active: true,
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approved: true,
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trust_level: TrustLevel[4],
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id: id,
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)
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user.save!(validate: false)
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update!(user_id: user.id)
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user
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end
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def regenerate_rag_fragments
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if rag_chunk_tokens_changed? || rag_chunk_overlap_tokens_changed?
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RagDocumentFragment.where(target: self).delete_all
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end
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end
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private
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def chat_preconditions
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if allow_chat && !default_llm
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errors.add(:default_llm, I18n.t("discourse_ai.ai_bot.personas.default_llm_required"))
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end
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end
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def system_persona_unchangeable
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if top_p_changed? || temperature_changed? || system_prompt_changed? || tools_changed? ||
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name_changed? || description_changed?
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errors.add(:base, I18n.t("discourse_ai.ai_bot.personas.cannot_edit_system_persona"))
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end
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end
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def ensure_not_system
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if system
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errors.add(:base, I18n.t("discourse_ai.ai_bot.personas.cannot_delete_system_persona"))
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throw :abort
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end
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end
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end
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# == Schema Information
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#
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# Table name: ai_personas
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#
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# id :bigint not null, primary key
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# name :string(100) not null
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# description :string(2000) not null
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# system_prompt :string(10000000) not null
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# allowed_group_ids :integer default([]), not null, is an Array
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# created_by_id :integer
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# enabled :boolean default(TRUE), not null
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# created_at :datetime not null
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# updated_at :datetime not null
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# system :boolean default(FALSE), not null
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# priority :boolean default(FALSE), not null
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# temperature :float
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# top_p :float
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# user_id :integer
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# mentionable :boolean default(FALSE), not null
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# default_llm :text
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# max_context_posts :integer
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# vision_enabled :boolean default(FALSE), not null
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# vision_max_pixels :integer default(1048576), not null
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# rag_chunk_tokens :integer default(374), not null
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# rag_chunk_overlap_tokens :integer default(10), not null
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# rag_conversation_chunks :integer default(10), not null
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# question_consolidator_llm :text
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# allow_chat :boolean default(FALSE), not null
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# tool_details :boolean default(TRUE), not null
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# tools :json not null
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#
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# Indexes
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#
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# index_ai_personas_on_name (name) UNIQUE
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#
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