Class: SmartBrain::MemoryStore::InMemory

Inherits:
Object
  • Object
show all
Defined in:
lib/smart_brain/memory_store/in_memory.rb

Constant Summary collapse

OVERWRITE_TYPES = 
%w[preferences goals tasks].freeze

Instance Method Summary collapse

Constructor Details

#initialize ⇒ InMemory

Returns a new instance of InMemory.



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 12

def initialize
  @by_scope = Hash.new { |h, k| h[k] = [] }
  @entities_index = Hash.new { |h, k| h[k] = [] }
  @summaries = {}
  @events = []
  @edges = []
  @exact = Retrievers::ExactRetriever.new
end

Instance Method Details

#active_items(session_id: nil, scope_ids: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 55

def active_items(session_id: nil, scope_ids: nil)
  selected_scope_ids = normalize_scope_ids(session_id, scope_ids)
  selected_scope_ids.flat_map { |scope_id| by_scope[scope_id] }
                    .select { |item| item[:status] == 'active' && included_lifecycle?(item) }
end

#add_edge(session_id:, edge:, scope_id: nil, scope: nil, source_session_id: nil) ⇒ Object

--- knowledge graph -----------------------------------------------------



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 145

def add_edge(session_id:, edge:, scope_id: nil, scope: nil, source_session_id: nil)
  resolved_scope_id = scope_id || edge[:scope_id] || legacy_scope_id(session_id)
  record = {
    id: SecureRandom.uuid,
    session_id: session_id,
    source_session_id: source_session_id || edge[:source_session_id] || session_id,
    scope_id: resolved_scope_id,
    scope: scope || edge[:scope] || { type: 'session', id: session_id },
    subject: edge[:subject].to_s,
    predicate: edge[:predicate].to_s,
    object: edge[:object].to_s,
    subject_entity_id: resolve_entity_id(nil, edge[:subject], scope_ids: [resolved_scope_id]),
    object_entity_id: resolve_entity_id(nil, edge[:object], scope_ids: [resolved_scope_id]),
    valid_from: edge[:valid_from] || Time.now.utc.iso8601,
    valid_to: edge[:valid_to],
    source_turn_id: edge[:source_turn_id],
    source_memory_item_id: edge[:source_memory_item_id],
    confidence: edge[:confidence] || 0.6,
    status: edge[:status] || 'active',
    meta: edge[:meta] || {},
    created_at: Time.now.utc.iso8601
  }
  edges << record
  record
end

#all_summaries ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 82

def all_summaries
  summaries.each_with_object({}) { |(sid, s), h| h[sid] = s }
end

#create_item(session_id:, item:, scope_id: nil, scope: nil) ⇒ Object

--- knowledge lifecycle -------------------------------------------------



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 87

def create_item(session_id:, item:, scope_id: nil, scope: nil)
  resolved_scope_id = scope_id || item[:scope_id] || legacy_scope_id(session_id)
  record = item.merge(
    id: SecureRandom.uuid, session_id: session_id, source_session_id: item[:source_session_id] || session_id,
    scope_id: resolved_scope_id, scope: scope || item[:scope] || { type: 'session', id: session_id }
  )
  by_scope[resolved_scope_id] << record
  update_entities(scope_id: resolved_scope_id, record: record)
  record
end

#edge_stats(session_id: nil, scope_ids: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 202

def edge_stats(session_id: nil, scope_ids: nil)
  selected_scope_ids = normalize_scope_ids(session_id, scope_ids)
  scoped = edges.select { |e| selected_scope_ids.include?(e[:scope_id]) }
  { total: scoped.size,
    active: scoped.count { |e| e[:status] == 'active' },
    invalidated: scoped.count { |e| e[:status] == 'invalidated' } }
end

#edges_for_subject(session_id: nil, scope_ids: nil, subject:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 184

def edges_for_subject(session_id: nil, scope_ids: nil, subject:)
  query_edges(session_id: session_id, scope_ids: scope_ids, subject: subject, include_invalid: true)
end

#entities(session_id: nil, scope_ids: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 61

def entities(session_id: nil, scope_ids: nil)
  normalize_scope_ids(session_id, scope_ids).flat_map { |scope_id| entities_index[scope_id] }
end

#events_for(memory_item_id:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 140

def events_for(memory_item_id:)
  events.select { |e| e[:memory_item_id] == memory_item_id }
end

#find_edge(id:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 198

def find_edge(id:)
  edges.find { |edge| edge[:id] == id }
end

#find_item(id:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 98

def find_item(id:)
  by_scope.values.flatten.find { |i| i[:id] == id }
end

#invalidate_edge(id:, reason: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 188

def invalidate_edge(id:, reason: nil)
  edge = edges.find { |e| e[:id] == id }
  return nil unless edge

  edge[:valid_to] = Time.now.utc.iso8601
  edge[:status] = 'invalidated'
  edge[:meta] = (edge[:meta] || {}).merge(invalidated_reason: reason)
  edge
end

#latest_summary(session_id:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 78

def latest_summary(session_id:)
  summaries[session_id]
end

#query_edges(session_id: nil, scope_ids: nil, subject: nil, predicate: nil, object: nil, include_invalid: false) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 171

def query_edges(session_id: nil, scope_ids: nil, subject: nil, predicate: nil, object: nil, include_invalid: false)
  selected_scope_ids = normalize_scope_ids(session_id, scope_ids)
  edges.select do |e|
    next false unless selected_scope_ids.include?(e[:scope_id])
    next false if !include_invalid && e[:status] != 'active'
    next false if subject && e[:subject].downcase != subject.to_s.downcase
    next false if predicate && e[:predicate].downcase != predicate.to_s.downcase
    next false if object && e[:object].downcase != object.to_s.downcase

    true
  end.sort_by { |e| e[:valid_from].to_s }
end

#record_event(memory_item_id:, event_type:, from_lifecycle: nil, to_lifecycle: nil, reason: nil, reason_type: nil, reviewer: nil, evidence_refs: []) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 122

def record_event(memory_item_id:, event_type:, from_lifecycle: nil, to_lifecycle: nil,
                 reason: nil, reason_type: nil, reviewer: nil, evidence_refs: [])
  event = {
    id: SecureRandom.uuid,
    memory_item_id: memory_item_id,
    event_type: event_type,
    from_lifecycle: from_lifecycle,
    to_lifecycle: to_lifecycle,
    reason: reason,
    reason_type: reason_type,
    reviewer: reviewer,
    evidence_refs: Array(evidence_refs),
    created_at: Time.now.utc.iso8601
  }
  events << event
  event
end

#resolve_entity_id(session_id, name, scope_ids: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 210

def resolve_entity_id(session_id, name, scope_ids: nil)
  return nil if name.nil? || name.to_s.empty?

  match = entities(session_id: session_id, scope_ids: scope_ids).find do |e|
    e[:canonical].to_s.downcase == name.to_s.downcase ||
      e[:name].to_s.downcase == name.to_s.downcase
  end
  match && match[:id]
end

#save_summary(session_id:, summary:) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 73

def save_summary(session_id:, summary:)
  summaries[session_id] = summary
  summary
end

#search_memory(query:, session_id: nil, scope_ids: nil, limit:) ⇒ Object

Substring/exact search over active memory_items. Mirrors the FTS path of MemoryStore::Postgres#search_memory so MemoryRetriever is backend-agnostic.



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 67

def search_memory(query:, session_id: nil, scope_ids: nil, limit:)
  @exact.retrieve(
    query: query, memory_items: active_items(session_id: session_id, scope_ids: scope_ids), recent_turns: [], limit: limit
  )
end

#set_lifecycle(id:, lifecycle_status:, merge_value: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 102

def set_lifecycle(id:, lifecycle_status:, merge_value: nil)
  item = find_item(id: id)
  return nil unless item

  item[:lifecycle_status] = lifecycle_status
  item[:value_json] = (item[:value_json] || {}).merge(merge_value || {})
  item[:updated_at] = Time.now.utc.iso8601
  item
end

#set_status(id:, status:, merge_value: nil) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 112

def set_status(id:, status:, merge_value: nil)
  item = find_item(id: id)
  return nil unless item

  item[:status] = status
  item[:value_json] = (item[:value_json] || {}).merge(merge_value || {})
  item[:updated_at] = Time.now.utc.iso8601
  item
end

#upsert(extracted) ⇒ Object 



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# File 'lib/smart_brain/memory_store/in_memory.rb', line 21

def upsert(extracted)
  session_id = extracted.fetch(:session_id)
  items = extracted.fetch(:items, [])
  written = []
  conflicts = []

  items.each do |item|
    scope_id = item[:scope_id] || legacy_scope_id(session_id)
    scope = item[:scope] || { type: 'session', id: session_id }
    existing = active_item(scope_id: scope_id, type: item[:type], key: item[:key])

    if existing && item[:status] == 'retracted'
      existing[:status] = 'retracted'
      conflicts << { type: 'retract', key: item[:key], previous_memory_item_id: existing[:id] }
      next
    end

    if existing && OVERWRITE_TYPES.include?(item[:type])
      existing[:status] = 'superseded'
      conflicts << { type: 'overwrite', key: item[:key], previous_memory_item_id: existing[:id] }
    end

    record = item.merge(
      id: SecureRandom.uuid, status: item[:status] || 'active', session_id: session_id,
      source_session_id: item[:source_session_id] || session_id, scope_id: scope_id, scope: scope
    )
    by_scope[scope_id] << record
    update_entities(scope_id: scope_id, record: record)
    written << record.slice(:id, :type, :key, :status, :confidence, :scope_id, :scope, :source_session_id)
  end

  { count: written.size, items: written, conflicts: conflicts }
end