Class: GraphQL::SchemaComparator::Diff::Schema

Inherits:
Object
  • Object
show all
Defined in:
lib/graphql/schema_comparator/diff/schema.rb

Instance Method Summary collapse

Constructor Details

#initialize(old_schema, new_schema) ⇒ Schema

Returns a new instance of Schema.



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# File 'lib/graphql/schema_comparator/diff/schema.rb', line 5

def initialize(old_schema, new_schema)
  @old_schema = old_schema
  @new_schema = new_schema

  @old_types = old_schema.types
  @new_types = new_schema.types

  @old_directives = old_schema.directives
  @new_directives = new_schema.directives
end

Instance Method Details

#changes_in_directives ⇒ Object 



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# File 'lib/graphql/schema_comparator/diff/schema.rb', line 100

def changes_in_directives
  changes = []

  changes += removed_directives.map { |directive| Changes::DirectiveRemoved.new(directive) }
  changes += added_directives.map { |directive| Changes::DirectiveAdded.new(directive) }

  each_common_directive do |old_directive, new_directive|
    changes += Diff::Directive.new(old_directive, new_directive).diff
  end

  changes
end

#changes_in_schema ⇒ Object 



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# File 'lib/graphql/schema_comparator/diff/schema.rb', line 64

def changes_in_schema
  changes = []

  if old_schema.query&.graphql_name != new_schema.query&.graphql_name
    if old_schema.query.nil?
      changes << Changes::RootOperationTypeAdded.new(new_schema: new_schema, operation_type: :query)
    elsif new_schema.query.nil?
      changes << Changes::RootOperationTypeRemoved.new(old_schema: old_schema, operation_type: :query)
    else
      changes << Changes::RootOperationTypeChanged.new(old_schema: old_schema, new_schema: new_schema, operation_type: :query)
    end
  end

  if old_schema.mutation&.graphql_name != new_schema.mutation&.graphql_name
    if old_schema.mutation.nil?
      changes << Changes::RootOperationTypeAdded.new(new_schema: new_schema, operation_type: :mutation)
    elsif new_schema.mutation.nil?
      changes << Changes::RootOperationTypeRemoved.new(old_schema: old_schema, operation_type: :mutation)
    else
      changes << Changes::RootOperationTypeChanged.new(old_schema: old_schema, new_schema: new_schema, operation_type: :mutation)
    end
  end

  if old_schema.subscription&.graphql_name != new_schema.subscription&.graphql_name
    if old_schema.subscription.nil?
      changes << Changes::RootOperationTypeAdded.new(new_schema: new_schema, operation_type: :subscription)
    elsif new_schema.subscription.nil?
      changes << Changes::RootOperationTypeRemoved.new(old_schema: old_schema, operation_type: :subscription)
    else
      changes << Changes::RootOperationTypeChanged.new(old_schema: old_schema, new_schema: new_schema, operation_type: :subscription)
    end
  end

  changes
end

#changes_in_type(old_type, new_type) ⇒ Object 



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# File 'lib/graphql/schema_comparator/diff/schema.rb', line 37

def changes_in_type(old_type, new_type)
  changes = []

  if old_type.kind != new_type.kind
    changes << Changes::TypeKindChanged.new(old_type, new_type)
  else
    case old_type.kind.name
    when "ENUM"
      changes += Diff::Enum.new(old_type, new_type, enum_usage(new_type)).diff
    when "UNION"
      changes += Diff::Union.new(old_type, new_type).diff
    when "INPUT_OBJECT"
      changes += Diff::InputObject.new(old_type, new_type).diff
    when "OBJECT"
      changes += Diff::ObjectType.new(old_type, new_type).diff
    when "INTERFACE"
      changes += Diff::Interface.new(old_type, new_type).diff
    end
  end

  if old_type.description != new_type.description
    changes << Changes::TypeDescriptionChanged.new(old_type, new_type)
  end

  changes
end

#diff ⇒ Object 



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# File 'lib/graphql/schema_comparator/diff/schema.rb', line 16

def diff
  changes = []

  # Removed and Added Types
  changes += removed_types.map { |type| Changes::TypeRemoved.new(type) }
  changes += added_types.map { |type| Changes::TypeAdded.new(type) }

  # Type Diff for common types
  each_common_type do |old_type, new_type|
    changes += changes_in_type(old_type, new_type)
  end

  # Diff Schemas
  changes += changes_in_schema

  # Diff Directives
  changes += changes_in_directives

  changes
end