Class: PromptEngine::Parameter

Inherits:
ApplicationRecord show all
Defined in:
app/models/prompt_engine/parameter.rb

Constant Summary collapse

TYPES =

Parameter types that can be used

%w[string integer decimal boolean datetime date array json].freeze

Instance Method Summary collapse

Instance Method Details

#cast_value(value) ⇒ Object

Convert the parameter value based on its type



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# File 'app/models/prompt_engine/parameter.rb', line 23

def cast_value(value)
  return default_value if value.blank? && !required?

  case parameter_type
  when "integer"
    value.to_i
  when "decimal"
    value.to_f
  when "boolean"
    ActiveModel::Type::Boolean.new.cast(value)
  when "datetime"
    DateTime.parse(value.to_s) rescue nil
  when "date"
    Date.parse(value.to_s) rescue nil
  when "array"
    value.is_a?(Array) ? value : value.to_s.split(",").map(&:strip)
  when "json"
    value.is_a?(String) ? JSON.parse(value) : value rescue {}
  else
    value.to_s
  end
end

#form_input_options ⇒ Object

Generate form input attributes for this parameter



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# File 'app/models/prompt_engine/parameter.rb', line 81

def form_input_options
  options = {
    label: name.humanize,
    required: required?,
    placeholder: example_value,
    hint: description
  }

  case parameter_type
  when "integer", "decimal"
    options[:type] = "number"
    options[:step] = parameter_type == "decimal" ? "0.01" : "1"
    options[:min] = validation_rules["min"] if validation_rules&.dig("min")
    options[:max] = validation_rules["max"] if validation_rules&.dig("max")
  when "boolean"
    options[:type] = "checkbox"
  when "datetime"
    options[:type] = "datetime-local"
  when "date"
    options[:type] = "date"
  when "array"
    options[:type] = "text"
    options[:hint] = "#{description} (comma-separated values)"
  when "json"
    options[:type] = "textarea"
    options[:hint] = "#{description} (JSON format)"
  else
    options[:type] = "text"
    options[:minlength] = validation_rules["min_length"] if validation_rules&.dig("min_length")
    options[:maxlength] = validation_rules["max_length"] if validation_rules&.dig("max_length")
    options[:pattern] = validation_rules["pattern"] if validation_rules&.dig("pattern")
  end

  options[:value] = default_value if default_value.present?

  options
end

#validate_value(value) ⇒ Object

Validate a value against this parameter’s rules



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# File 'app/models/prompt_engine/parameter.rb', line 47

def validate_value(value)
  errors = []

  if required? && value.blank?
    errors << "#{name} is required"
  end

  if validation_rules.present?
    # Apply custom validation rules
    if validation_rules["min_length"] && value.to_s.length < validation_rules["min_length"]
      errors << "#{name} must be at least #{validation_rules['min_length']} characters"
    end

    if validation_rules["max_length"] && value.to_s.length > validation_rules["max_length"]
      errors << "#{name} must be at most #{validation_rules['max_length']} characters"
    end

    if validation_rules["pattern"] && !value.to_s.match?(Regexp.new(validation_rules["pattern"]))
      errors << "#{name} must match pattern: #{validation_rules['pattern']}"
    end

    if validation_rules["min"] && cast_value(value) < validation_rules["min"]
      errors << "#{name} must be at least #{validation_rules['min']}"
    end

    if validation_rules["max"] && cast_value(value) > validation_rules["max"]
      errors << "#{name} must be at most #{validation_rules['max']}"
    end
  end

  errors
end