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Class: Kward::SessionTreeNodes

Inherits:
Object
  • Object
show all
Defined in:
lib/kward/session_tree_nodes.rb

Overview

Shared traversal helpers for persisted session trees.

Frontends own their final labels or payloads. This class owns only the frontend-neutral mechanics needed by both terminal and RPC tree views: active-path lookup, hidden tool-call-only assistant nodes, visible-node flattening, and assistant tool-call lookup by id.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(roots:, current_leaf: nil) ⇒ SessionTreeNodes

Returns a new instance of SessionTreeNodes.



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# File 'lib/kward/session_tree_nodes.rb', line 14

def initialize(roots:, current_leaf: nil)
  @roots = roots
  @current_leaf = current_leaf
end

Class Method Details

.tree_prefix(display_indent, gutters, show_connector, is_last, foldable) ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 103

def self.tree_prefix(display_indent, gutters, show_connector, is_last, foldable)
  return "" if display_indent.to_i <= 0

  connector_position = show_connector ? display_indent - 1 : -1
  (0...(display_indent * 3)).map do |index|
    level = index / 3
    position = index % 3
    gutter = gutters.find { |candidate| candidate[:position] == level }

    if gutter
      position.zero? && gutter[:show] ? "│" : " "
    elsif show_connector && level == connector_position
      if position.zero?
        is_last ? "└" : "├"
      elsif position == 1
        foldable ? "⊟" : "─"
      else
        " "
      end
    else
      " "
    end
  end.join
end

.truncate_text(text) ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 128

def self.truncate_text(text)
  MessageText.truncate_preview(text)
end

Instance Method Details

#active_path ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 19

def active_path
  by_id = entries_by_id
  ids = []
  entry = by_id[@current_leaf.to_s]
  seen = {}
  while entry && !seen[entry["id"].to_s]
    seen[entry["id"].to_s] = true
    ids << entry["id"].to_s
    entry = by_id[entry["parentId"].to_s]
  end
  ids
end

#layout_rows ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 55

def layout_rows
  active = active_path
  roots = visible_roots
  active_nodes = active_node_lookup(roots, active)
  multiple_roots = roots.length > 1
  result = []

  stack = roots.sort_by { |root| active_nodes[root.object_id] ? 0 : 1 }.each_with_index.map do |root, index|
    [root, multiple_roots ? 1 : 0, multiple_roots, multiple_roots, index == roots.length - 1, [], multiple_roots]
  end.reverse

  until stack.empty?
    node, indent, just_branched, show_connector, is_last, gutters, virtual_root_child = stack.pop
    entry = node[:source]["entry"] || {}
    entry_id = entry["id"].to_s
    display_indent = multiple_roots ? [indent - 1, 0].max : indent
    show_node_connector = show_connector && !virtual_root_child

    result << {
      source: node[:source],
      entry: entry,
      depth: display_indent,
      is_last: is_last,
      gutters: gutters,
      active_path: active.include?(entry_id),
      prefix: self.class.tree_prefix(display_indent, gutters, show_node_connector, is_last, !node[:children].empty?)
    }

    children = node[:children].sort_by { |child| active_nodes[child.object_id] ? 0 : 1 }
    multiple_children = children.length > 1
    child_indent = if multiple_children
                     indent + 1
                   elsif just_branched && indent.positive?
                     indent + 1
                   else
                     indent
                   end
    connector_position = [display_indent - 1, 0].max
    child_gutters = show_node_connector ? gutters + [{ position: connector_position, show: !is_last }] : gutters

    children.each_with_index.reverse_each do |child, index|
      stack << [child, child_indent, multiple_children, multiple_children, index == children.length - 1, child_gutters, false]
    end
  end

  result
end

#tool_calls ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 36

def tool_calls
  @roots.each_with_object({}) do |root, calls|
    stack = [root]
    seen = {}
    until stack.empty?
      node = stack.pop
      next if seen[node.object_id]

      seen[node.object_id] = true
      entry = node["entry"] || {}
      message = entry["message"]
      if entry["type"] == "message" && message.is_a?(Hash) && MessageAccess.role(message) == "assistant"
        MessageAccess.tool_calls(message).each { |tool_call| calls[ToolCall.id(tool_call).to_s] = tool_call }
      end
      stack.concat(Array(node["children"]))
    end
  end
end

#visible_roots ⇒ Object 



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# File 'lib/kward/session_tree_nodes.rb', line 32

def visible_roots
  @roots.flat_map { |root| visible_nodes(root) }
end