Module: Unitsdb::Commands::Ucum::Matcher

Defined in:
lib/unitsdb/commands/ucum/matcher.rb

Overview

Matcher for UCUM and UnitsDB entities

Class Method Summary collapse

Class Method Details

.find_db_match_for_ucum(ucum_entity, db_entities, entity_type) ⇒ Object

Find a matching UnitsDB entity for a UCUM entity



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 88

def find_db_match_for_ucum(ucum_entity, db_entities, entity_type)
  result = { match: nil, potential_match: nil }

  # Different matching logic based on entity type
  case entity_type
  when "prefixes"
    result = match_prefix_ucum_to_db(ucum_entity, db_entities)
  when "units"
    result = match_unit_ucum_to_db(ucum_entity, db_entities)
  end

  result
end

.find_referenced_ucum_entity(db_entity, ucum_entities) ⇒ Object

Find the referenced UCUM entity based on the reference URI



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 72

def find_referenced_ucum_entity(db_entity, ucum_entities)
  return nil unless db_entity.respond_to?(:references) && db_entity.references

  ucum_ref = db_entity.references.find { |ref| ref.authority == "ucum" }
  return nil unless ucum_ref

  ref_uri = ucum_ref.uri
  ucum_entities.find { |ucum_entity| ucum_entity.identifier == ref_uri }
end

.find_ucum_match_for_db(db_entity, ucum_entities, entity_type) ⇒ Object

Find a matching UCUM entity for a UnitsDB entity



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 103

def find_ucum_match_for_db(db_entity, ucum_entities, entity_type)
  result = { match: nil }

  # Different matching logic based on entity type
  case entity_type
  when "prefixes"
    result = match_prefix_db_to_ucum(db_entity, ucum_entities)
  when "units"
    result = match_unit_db_to_ucum(db_entity, ucum_entities)
  end

  result
end

.get_entity_id(entity) ⇒ Object

Get the ID of a UnitsDB entity



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 83

def get_entity_id(entity)
  entity.respond_to?(:id) ? entity.id : nil
end

.has_ucum_reference?(entity) ⇒ Boolean

Check if a UnitsDB entity already has a UCUM reference

Returns:

  • (Boolean) 


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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 65

def has_ucum_reference?(entity)
  return false unless entity.respond_to?(:references) && entity.references

  entity.references.any? { |ref| ref.authority == "ucum" }
end

.match_db_to_ucum(entity_type, ucum_entities, db_entities) ⇒ Object

Match UnitsDB entities to UCUM entities (UnitsDB → UCUM)



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 36

def match_db_to_ucum(entity_type, ucum_entities, db_entities)
  puts "Matching UnitsDB #{entity_type} to UCUM #{entity_type}..."

  # Initialize result arrays
  matches = []
  missing_refs = []
  unmatched_db = []

  # Process each UnitsDB entity
  db_entities.send(entity_type).each do |db_entity|
    # Skip entities that already have UCUM references
    if has_ucum_reference?(db_entity)
      matches << { db_entity: db_entity, ucum_entity: find_referenced_ucum_entity(db_entity, ucum_entities) }
      next
    end

    match_data = find_ucum_match_for_db(db_entity, ucum_entities, entity_type)

    if match_data[:match]
      missing_refs << { db_entity: db_entity, ucum_entity: match_data[:match] }
    else
      unmatched_db << db_entity
    end
  end

  [matches, missing_refs, unmatched_db]
end

.match_prefix_db_to_ucum(db_prefix, ucum_prefixes) ⇒ Object

Match UnitsDB prefix to UCUM prefix



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 164

def match_prefix_db_to_ucum(db_prefix, ucum_prefixes)
  result = { match: nil }

  # Try exact name match first
  if db_prefix.names && !db_prefix.names.empty?
    db_prefix_names = db_prefix.names.map { |name_obj| name_obj.value.downcase }

    name_match = ucum_prefixes.find do |ucum_prefix|
      db_prefix_names.include?(ucum_prefix.name.downcase)
    end

    if name_match
      result[:match] = name_match
      return result
    end
  end

  # Try symbol match
  if db_prefix.symbols && !db_prefix.symbols.empty?
    symbol_match = ucum_prefixes.find do |ucum_prefix|
      db_prefix.symbols.any? do |symbol|
        ucum_prefix.print_symbol == symbol.ascii ||
          ucum_prefix.print_symbol == symbol.unicode
      end
    end

    result[:match] = symbol_match if symbol_match
  end

  result
end

.match_prefix_ucum_to_db(ucum_prefix, db_prefixes) ⇒ Object

Match UCUM prefix to UnitsDB prefix



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 118

def match_prefix_ucum_to_db(ucum_prefix, db_prefixes)
  result = { match: nil, potential_match: nil }

  # Try exact name match first
  name_match = db_prefixes.find do |db_prefix|
    db_prefix.names&.any? do |name_obj|
      name_obj.value.downcase == ucum_prefix.name.downcase
    end
  end

  if name_match
    result[:match] = name_match
    return result
  end

  # Try symbol match
  symbol_match = db_prefixes.find do |db_prefix|
    db_prefix.symbols&.any? do |symbol|
      symbol.ascii == ucum_prefix.print_symbol ||
        symbol.unicode == ucum_prefix.print_symbol
    end
  end

  if symbol_match
    result[:match] = symbol_match
    return result
  end

  # Try value match if available (using base^power)
  if ucum_prefix.value&.value
    value_match = db_prefixes.find do |db_prefix|
      if db_prefix.base && db_prefix.power
        calculated_value = db_prefix.base**db_prefix.power
        calculated_value.to_s == ucum_prefix.value.value
      else
        false
      end
    end

    result[:potential_match] = value_match if value_match
  end

  result
end

.match_ucum_to_db(entity_type, ucum_entities, db_entities) ⇒ Object

Match UCUM entities to UnitsDB entities (UCUM → UnitsDB)



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 11

def match_ucum_to_db(entity_type, ucum_entities, db_entities)
  puts "Matching UCUM #{entity_type} to UnitsDB #{entity_type}..."

  # Initialize result arrays
  matches = []
  missing_matches = []
  unmatched_ucum = []

  # Process each UCUM entity
  ucum_entities.each do |ucum_entity|
    match_data = find_db_match_for_ucum(ucum_entity, db_entities, entity_type)

    if match_data[:match]
      matches << { ucum_entity: ucum_entity, db_entity: match_data[:match] }
    elsif match_data[:potential_match]
      missing_matches << { ucum_entity: ucum_entity, db_entity: match_data[:potential_match] }
    else
      unmatched_ucum << ucum_entity
    end
  end

  [matches, missing_matches, unmatched_ucum]
end

.match_unit_db_to_ucum(db_unit, ucum_units) ⇒ Object

Match UnitsDB unit to UCUM unit



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 259

def match_unit_db_to_ucum(db_unit, ucum_units)
  result = { match: nil }

  # Try name match first
  if db_unit.names && !db_unit.names.empty?
    db_unit_names = db_unit.names.map { |name_obj| name_obj.value.downcase }

    name_match = ucum_units.find do |ucum_unit|
      case ucum_unit
      when Unitsdb::UcumBaseUnit
        db_unit_names.include?(ucum_unit.name.downcase)
      when Unitsdb::UcumUnit
        ucum_names = ucum_unit.name.is_a?(Array) ? ucum_unit.name : [ucum_unit.name]
        ucum_names.any? { |name| db_unit_names.include?(name.downcase) }
      else
        false
      end
    end

    if name_match
      result[:match] = name_match
      return result
    end
  end

  # Try symbol match
  if db_unit.symbols && !db_unit.symbols.empty?
    symbol_match = ucum_units.find do |ucum_unit|
      db_unit.symbols.any? do |symbol|
        ucum_unit.print_symbol == symbol.ascii ||
          ucum_unit.print_symbol == symbol.unicode
      end
    end

    result[:match] = symbol_match if symbol_match
  end

  result
end

.match_unit_ucum_to_db(ucum_unit, db_units) ⇒ Object

Match UCUM unit to UnitsDB unit



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# File 'lib/unitsdb/commands/ucum/matcher.rb', line 197

def match_unit_ucum_to_db(ucum_unit, db_units)
  result = { match: nil, potential_match: nil }

  # Get UCUM unit name(s)
  ucum_names = case ucum_unit
               when Unitsdb::UcumBaseUnit
                 [ucum_unit.name]
               when Unitsdb::UcumUnit
                 ucum_unit.name.is_a?(Array) ? ucum_unit.name : [ucum_unit.name]
               else
                 []
               end

  # Try name match
  ucum_names.each do |ucum_name|
    name_match = db_units.find do |db_unit|
      db_unit.names&.any? do |name_obj|
        name_obj.value.downcase == ucum_name.downcase
      end
    end

    if name_match
      result[:match] = name_match
      return result
    end
  end

  # Try symbol match
  symbol_match = db_units.find do |db_unit|
    db_unit.symbols&.any? do |symbol|
      symbol.ascii == ucum_unit.print_symbol ||
        symbol.unicode == ucum_unit.print_symbol
    end
  end

  if symbol_match
    result[:match] = symbol_match
    return result
  end

  # Try property/dimension match for potential matches
  property = case ucum_unit
             when Unitsdb::UcumBaseUnit
               ucum_unit.property
             when Unitsdb::UcumUnit
               ucum_unit.property
             end

  if property
    property_matches = db_units.select do |db_unit|
      db_unit.quantity_references&.any? do |qref|
        qref.id&.downcase&.include?(property.downcase)
      end
    end

    result[:potential_match] = property_matches.first if property_matches.any?
  end

  result
end