Class: Structify::SchemaBuilder

Inherits:
Object
  • Object
show all
Defined in:
lib/structify/model.rb

Overview

Builder class for constructing the schema

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(model) ⇒ SchemaBuilder

Initialize a new SchemaBuilder



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# File 'lib/structify/model.rb', line 123

def initialize(model)
  @model = model
  @fields = []
  @version_number = 1
  @thinking_enabled = false
end

Instance Attribute Details

#description_str ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def description_str
  @description_str
end

#fields ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def fields
  @fields
end

#model ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def model
  @model
end

#name_str ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def name_str
  @name_str
end

#thinking_enabled ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def thinking_enabled
  @thinking_enabled
end

#version_number ⇒ Class, ... (readonly) 



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# File 'lib/structify/model.rb', line 118

def version_number
  @version_number
end

Instance Method Details

#define_version_range_accessor(name, version_range) ⇒ void

This method returns an undefined value.

Define accessor for fields that are not in the current schema version These will raise an appropriate error when accessed



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# File 'lib/structify/model.rb', line 373

def define_version_range_accessor(name, version_range)
  # Capture schema version to use in the eval block
  schema_version = @version_number
  
  # Handle different version range types
  version_range_type = case version_range
                      when Range
                        "range"
                      when Array
                        "array"
                      else
                        "integer"
                      end
                      
  # Extract begin/end values for ranges
  range_begin = case version_range
                when Range
                  version_range.begin
                when Array
                  version_range.min
                else
                  version_range
                end
                
  range_end = case version_range
              when Range
                version_range.end
              when Array
                version_range.max
              else
                version_range
              end
  
  model.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    # Define an accessor that raises an error when accessed
    def #{name}
      # Based on the version_range type, create appropriate errors
      case "#{version_range_type}"
      when "range"
        if #{range_begin} <= #{schema_version} && #{range_end} < #{schema_version}
          # Removed field
          raise Structify::RemovedFieldError.new("#{name}", #{range_end})
        elsif #{range_begin} > #{schema_version}
          # Field from future version
          raise Structify::VersionRangeError.new("#{name}", #{schema_version}, #{version_range.inspect})
        else
          # Not in range for other reasons
          raise Structify::VersionRangeError.new("#{name}", #{schema_version}, #{version_range.inspect})
        end
      when "array"
        # For arrays, we can only check if the current version is in the array
        raise Structify::VersionRangeError.new("#{name}", #{schema_version}, #{version_range.inspect})
      else
        # For integers, just report version mismatch
        raise Structify::VersionRangeError.new("#{name}", #{schema_version}, #{version_range.inspect})
      end
    end
    
    # Define a writer that raises an error too
    def #{name}=(value)
      # Use the same error logic as the reader
      self.#{name}
    end
  RUBY
end

#define_version_range_accessors(name, type, version_range) ⇒ void

This method returns an undefined value.

Define accessor methods that check version compatibility using the new version ranges



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# File 'lib/structify/model.rb', line 300

def define_version_range_accessors(name, type, version_range)
  # Define the attr_json normally first
  model.attr_json name, type
  
  # Extract current version for error messages
  schema_version = @version_number
  
  # Then override the reader method to check versions
  model.class_eval <<-RUBY, __FILE__, __LINE__ + 1
    # Store original method
    alias_method :_original_#{name}, :#{name}
    
    # Override reader to check version compatibility
    def #{name}
      # Get the container attribute and data
      container_attribute = self.class.attr_json_config.default_container_attribute
      record_data = self.send(container_attribute)
      
      # Get the version from the record data
      record_version = record_data && record_data["version"] ? 
                       record_data["version"] : 1
      
      # Check if record version is compatible with field's version range
      field_version_range = #{version_range.inspect}
      
      # Handle field lifecycle based on version
      unless version_in_range?(record_version, field_version_range)
        # Check if this is a removed field (was valid in earlier versions but not current version)
        if field_version_range.is_a?(Range) && field_version_range.begin <= record_version && field_version_range.end < #{schema_version}
          raise Structify::RemovedFieldError.new(
            "#{name}", 
            field_version_range.end
          )
        # Check if this is a new field (only valid in later versions)
        elsif (field_version_range.is_a?(Range) && field_version_range.begin > record_version) ||
              (field_version_range.is_a?(Integer) && field_version_range > record_version)
          raise Structify::VersionRangeError.new(
            "#{name}", 
            record_version,
            field_version_range
          )
        # Otherwise it's just not in the valid range
        else
          raise Structify::VersionRangeError.new(
            "#{name}", 
            record_version, 
            field_version_range
          )
        end
      end
      
      # Check for deprecated fields and show warning
      if field_version_range.is_a?(Range) && 
         field_version_range.begin < #{schema_version} && 
         field_version_range.end < 999 && 
         field_version_range.cover?(record_version)
        ActiveSupport::Deprecation.warn(
          "Field '#{name}' is deprecated as of version #{schema_version} and will be removed in version \#{field_version_range.end}."
        )
      end
      
      # Call original method
      _original_#{name}
    end
  RUBY
end

#description(desc) ⇒ void

This method returns an undefined value.

Set the schema description



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# File 'lib/structify/model.rb', line 155

def description(desc)
  @description_str = desc
end

#field(name, type, required: false, description: nil, enum: nil, items: nil, properties: nil, min_items: nil, max_items: nil, unique_items: nil, versions: nil) ⇒ void

This method returns an undefined value.

Define a field in the schema



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# File 'lib/structify/model.rb', line 189

def field(name, type, required: false, description: nil, enum: nil, 
          items: nil, properties: nil, min_items: nil, max_items: nil, 
          unique_items: nil, versions: nil)
  
  # Handle version information
  version_range = if versions
                    # Use the versions parameter if provided
                    versions
                  else
                    # Default: field is available in all versions
                    1..999
                  end
  
  # Check if the field is applicable for the current schema version
  field_available = version_in_range?(@version_number, version_range)
  
  # Skip defining the field in the schema if it's not applicable to the current version
  unless field_available
    # Still define an accessor that raises an appropriate error
    define_version_range_accessor(name, version_range)
    return
  end
  
  # Calculate a simple introduced_in for backward compatibility
  effective_introduced_in = case version_range
                           when Range
                             version_range.begin
                           when Array
                             version_range.min
                           else
                             version_range
                           end
  
  field_definition = {
    name: name,
    type: type,
    required: required,
    description: description,
    version_range: version_range,
    introduced_in: effective_introduced_in
  }
  
  # Add enum if provided
  field_definition[:enum] = enum if enum
  
  # Array specific properties
  if type == :array
    field_definition[:items] = items if items
    field_definition[:min_items] = min_items if min_items
    field_definition[:max_items] = max_items if max_items
    field_definition[:unique_items] = unique_items if unique_items
  end
  
  # Object specific properties
  if type == :object
    field_definition[:properties] = properties if properties
  end
  
  fields << field_definition
  
  # Track field by its version range
  @fields_by_version ||= {}
  @fields_by_version[effective_introduced_in] ||= []
  @fields_by_version[effective_introduced_in] << name

  # Map JSON Schema types to Ruby/AttrJson types
  attr_type = case type
              when :integer, :number
                :integer
              when :array
                :json
              when :object
                :json
              when :boolean
                :boolean
              else
                type # string, text stay the same
              end

  # Define custom accessor that checks version compatibility
  define_version_range_accessors(name, attr_type, version_range)
end

#name(value) ⇒ void

This method returns an undefined value.

Set the schema name



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# File 'lib/structify/model.rb', line 143

def name(value)
  # Validate the name pattern (must match ^[a-zA-Z0-9_-]+$)
  unless value =~ /^[a-zA-Z0-9_-]+$/
    raise ArgumentError, "Schema name must only contain alphanumeric characters, underscores, and hyphens"
  end
  @name_str = value
end

#thinking(enabled) ⇒ void

This method returns an undefined value.

Enable or disable thinking mode When enabled, the LLM will be asked to provide chain of thought reasoning



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# File 'lib/structify/model.rb', line 135

def thinking(enabled)
  @thinking_enabled = enabled
end

#to_json_schema ⇒ Hash

Generate the JSON schema representation



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# File 'lib/structify/model.rb', line 442

def to_json_schema
  serializer = SchemaSerializer.new(self)
  serializer.to_json_schema
end

#version(num) ⇒ void

This method returns an undefined value.

Set the schema version



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# File 'lib/structify/model.rb', line 163

def version(num)
  @version_number = num
  
  # Define version as an attr_json field so it's stored in extracted_data
  model.attr_json :version, :integer, default: num
  
  # Store mapping of fields to their introduction version
  @fields_by_version ||= {}
  @fields_by_version[num] ||= []
end

#version_in_range?(version, range) ⇒ Boolean

Check if a version is within a given range/array of versions



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# File 'lib/structify/model.rb', line 277

def version_in_range?(version, range)
  case range
  when Range
    # Handle endless ranges (Ruby 2.6+): 2.. means 2 and above
    if range.end.nil?
      version >= range.begin
    else
      range.cover?(version)
    end
  when Array
    range.include?(version)
  else
    # A single integer means "this version and onwards"
    version >= range
  end
end