Model.swift

/*
 * The MIT License (MIT)
 *
 * Copyright (C) 2019, CosmicMind, Inc. <http://cosmicmind.com>.
 * All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

import CoreData

internal struct ModelIdentifier {
  static let entityName: String = "ManagedEntity"
  static let entityPropertyName: String = "ManagedEntityProperty"
  static let entityTagName: String = "ManagedEntityTag"
  static let entityGroupName: String = "ManagedEntityGroup"
  
  static let actionName: String = "ManagedAction"
  static let actionPropertyName: String = "ManagedActionProperty"
  static let actionTagName: String = "ManagedActionTag"
  static let actionGroupName: String = "ManagedActionGroup"
  
  static let relationshipName: String = "ManagedRelationship"
  static let relationshipPropertyName: String = "ManagedRelationshipProperty"
  static let relationshipTagName: String = "ManagedRelationshipTag"
  static let relationshipGroupName: String = "ManagedRelationshipGroup"
}

internal struct Model {
  /// A static reference to the managedObjectModel.
  static var managedObjectModel: NSManagedObjectModel?
  
  /// Creates a NSManagedObjectModel.
  static func create() -> NSManagedObjectModel {
    _ = Model.__once
    return Model.managedObjectModel!
  }
  
  /// Constructs the model once.
  private static var __once: () = {
    // Entity
    
    let entityDescription = NSEntityDescription()
    var entityProperties : [Any] = []
    entityDescription.name = ModelIdentifier.entityName
    entityDescription.managedObjectClassName = ModelIdentifier.entityName
    
    let entityPropertyDescription = NSEntityDescription()
    var entityPropertyProperties : [Any] = []
    entityPropertyDescription.name = ModelIdentifier.entityPropertyName
    entityPropertyDescription.managedObjectClassName = ModelIdentifier.entityPropertyName
    
    let entityTagDescription = NSEntityDescription()
    var entityTagProperties : [Any] = []
    entityTagDescription.name = ModelIdentifier.entityTagName
    entityTagDescription.managedObjectClassName = ModelIdentifier.entityTagName
    
    let entityGroupDescription = NSEntityDescription()
    var entityGroupProperties : [Any] = []
    entityGroupDescription.name = ModelIdentifier.entityGroupName
    entityGroupDescription.managedObjectClassName = ModelIdentifier.entityGroupName
    
    // Relationship
    
    let relationshipDescription = NSEntityDescription()
    var relationshipProperties : [Any] = []
    relationshipDescription.name = ModelIdentifier.relationshipName
    relationshipDescription.managedObjectClassName = ModelIdentifier.relationshipName
    
    let relationshipPropertyDescription = NSEntityDescription()
    var relationshipPropertyProperties : [Any] = []
    relationshipPropertyDescription.name = ModelIdentifier.relationshipPropertyName
    relationshipPropertyDescription.managedObjectClassName = ModelIdentifier.relationshipPropertyName
    
    let relationshipTagDescription = NSEntityDescription()
    var relationshipTagProperties : [Any] = []
    relationshipTagDescription.name = ModelIdentifier.relationshipTagName
    relationshipTagDescription.managedObjectClassName = ModelIdentifier.relationshipTagName
    
    let relationshipGroupDescription = NSEntityDescription()
    var relationshipGroupProperties : [Any] = []
    relationshipGroupDescription.name = ModelIdentifier.relationshipGroupName
    relationshipGroupDescription.managedObjectClassName = ModelIdentifier.relationshipGroupName
    
    // Action
    
    let actionDescription = NSEntityDescription()
    var actionProperties : [Any] = []
    actionDescription.name = ModelIdentifier.actionName
    actionDescription.managedObjectClassName = ModelIdentifier.actionName
    
    let actionPropertyDescription = NSEntityDescription()
    var actionPropertyProperties : [Any] = []
    actionPropertyDescription.name = ModelIdentifier.actionPropertyName
    actionPropertyDescription.managedObjectClassName = ModelIdentifier.actionPropertyName
    
    let actionTagDescription = NSEntityDescription()
    var actionTagProperties : [Any] = []
    actionTagDescription.name = ModelIdentifier.actionTagName
    actionTagDescription.managedObjectClassName = ModelIdentifier.actionTagName
    
    let actionGroupDescription = NSEntityDescription()
    var actionGroupProperties : [Any] = []
    actionGroupDescription.name = ModelIdentifier.actionGroupName
    actionGroupDescription.managedObjectClassName = ModelIdentifier.actionGroupName
    
    // nodeClass
    
    let nodeClass = NSAttributeDescription()
    nodeClass.name = "nodeClass"
    nodeClass.attributeType = .integer64AttributeType
    nodeClass.isOptional = false
    entityProperties.append(nodeClass.copy() as! NSAttributeDescription)
    actionProperties.append(nodeClass.copy() as! NSAttributeDescription)
    relationshipProperties.append(nodeClass.copy() as! NSAttributeDescription)
    
    // type
    
    let type = NSAttributeDescription()
    type.name = "type"
    type.attributeType = .stringAttributeType
    type.isOptional = false
    entityProperties.append(type.copy() as! NSAttributeDescription)
    actionProperties.append(type.copy() as! NSAttributeDescription)
    relationshipProperties.append(type.copy() as! NSAttributeDescription)
    
    // createdDate
    
    let createdDate = NSAttributeDescription()
    createdDate.name = "createdDate"
    createdDate.attributeType = .dateAttributeType
    createdDate.isOptional = false
    entityProperties.append(createdDate.copy() as! NSAttributeDescription)
    actionProperties.append(createdDate.copy() as! NSAttributeDescription)
    relationshipProperties.append(createdDate.copy() as! NSAttributeDescription)
    
    // property
    
    let propertyName = NSAttributeDescription()
    propertyName.name = "name"
    propertyName.attributeType = .stringAttributeType
    propertyName.isOptional = false
    entityPropertyProperties.append(propertyName.copy() as! NSAttributeDescription)
    actionPropertyProperties.append(propertyName.copy() as! NSAttributeDescription)
    relationshipPropertyProperties.append(propertyName.copy() as! NSAttributeDescription)
    
    let propertyValue = NSAttributeDescription()
    propertyValue.name = "object"
    propertyValue.attributeType = .transformableAttributeType
    propertyValue.attributeValueClassName = "Any"
    propertyValue.isOptional = false
    propertyValue.allowsExternalBinaryDataStorage = true
    entityPropertyProperties.append(propertyValue.copy() as! NSAttributeDescription)
    actionPropertyProperties.append(propertyValue.copy() as! NSAttributeDescription)
    relationshipPropertyProperties.append(propertyValue.copy() as! NSAttributeDescription)
    
    let propertyRelationship = NSRelationshipDescription()
    propertyRelationship.name = "node"
    propertyRelationship.minCount = 1
    propertyRelationship.maxCount = 1
    propertyRelationship.isOptional = false
    propertyRelationship.deleteRule = .noActionDeleteRule
    
    let propertySetRelationship = NSRelationshipDescription()
    propertySetRelationship.name = "propertySet"
    propertySetRelationship.minCount = 0
    propertySetRelationship.maxCount = 0
    propertySetRelationship.isOptional = false
    propertySetRelationship.deleteRule = .noActionDeleteRule
    propertyRelationship.inverseRelationship = propertySetRelationship
    propertySetRelationship.inverseRelationship = propertyRelationship
    
    propertyRelationship.destinationEntity = entityDescription
    propertySetRelationship.destinationEntity = entityPropertyDescription
    entityPropertyProperties.append(propertyRelationship.copy() as! NSRelationshipDescription)
    entityProperties.append(propertySetRelationship.copy() as! NSRelationshipDescription)
    
    propertyRelationship.destinationEntity = relationshipDescription
    propertySetRelationship.destinationEntity = relationshipPropertyDescription
    relationshipPropertyProperties.append(propertyRelationship.copy() as! NSRelationshipDescription)
    relationshipProperties.append(propertySetRelationship.copy() as! NSRelationshipDescription)
    
    propertyRelationship.destinationEntity = actionDescription
    propertySetRelationship.destinationEntity = actionPropertyDescription
    actionPropertyProperties.append(propertyRelationship.copy() as! NSRelationshipDescription)
    actionProperties.append(propertySetRelationship.copy() as! NSRelationshipDescription)
    
    // tag
    
    let tagName = NSAttributeDescription()
    tagName.name = "name"
    tagName.attributeType = .stringAttributeType
    tagName.isOptional = false
    entityTagProperties.append(tagName.copy() as! NSAttributeDescription)
    actionTagProperties.append(tagName.copy() as! NSAttributeDescription)
    relationshipTagProperties.append(tagName.copy() as! NSAttributeDescription)
    
    let tagRelationship = NSRelationshipDescription()
    tagRelationship.name = "node"
    tagRelationship.minCount = 1
    tagRelationship.maxCount = 1
    tagRelationship.isOptional = false
    tagRelationship.deleteRule = .noActionDeleteRule
    
    let tagSetRelationship = NSRelationshipDescription()
    tagSetRelationship.name = "tagSet"
    tagSetRelationship.minCount = 0
    tagSetRelationship.maxCount = 0
    tagSetRelationship.isOptional = false
    tagSetRelationship.deleteRule = .noActionDeleteRule
    tagRelationship.inverseRelationship = tagSetRelationship
    tagSetRelationship.inverseRelationship = tagRelationship
    
    tagRelationship.destinationEntity = entityDescription
    tagSetRelationship.destinationEntity = entityTagDescription
    entityTagProperties.append(tagRelationship.copy() as! NSRelationshipDescription)
    entityProperties.append(tagSetRelationship.copy() as! NSRelationshipDescription)
    
    tagRelationship.destinationEntity = relationshipDescription
    tagSetRelationship.destinationEntity = relationshipTagDescription
    relationshipTagProperties.append(tagRelationship.copy() as! NSRelationshipDescription)
    relationshipProperties.append(tagSetRelationship.copy() as! NSRelationshipDescription)
    
    tagRelationship.destinationEntity = actionDescription
    tagSetRelationship.destinationEntity = actionTagDescription
    actionTagProperties.append(tagRelationship.copy() as! NSRelationshipDescription)
    actionProperties.append(tagSetRelationship.copy() as! NSRelationshipDescription)
    
    // group
    
    let groupName = NSAttributeDescription()
    groupName.name = "name"
    groupName.attributeType = .stringAttributeType
    groupName.isOptional = false
    entityGroupProperties.append(groupName.copy() as! NSAttributeDescription)
    actionGroupProperties.append(groupName.copy() as! NSAttributeDescription)
    relationshipGroupProperties.append(groupName.copy() as! NSAttributeDescription)
    
    let groupRelationship = NSRelationshipDescription()
    groupRelationship.name = "node"
    groupRelationship.minCount = 1
    groupRelationship.maxCount = 1
    groupRelationship.isOptional = false
    groupRelationship.deleteRule = .noActionDeleteRule
    
    let groupSetRelationship = NSRelationshipDescription()
    groupSetRelationship.name = "groupSet"
    groupSetRelationship.minCount = 0
    groupSetRelationship.maxCount = 0
    groupSetRelationship.isOptional = false
    groupSetRelationship.deleteRule = .noActionDeleteRule
    groupRelationship.inverseRelationship = groupSetRelationship
    groupSetRelationship.inverseRelationship = groupRelationship
    
    groupRelationship.destinationEntity = entityDescription
    groupSetRelationship.destinationEntity = entityGroupDescription
    entityGroupProperties.append(groupRelationship.copy() as! NSRelationshipDescription)
    entityProperties.append(groupSetRelationship.copy() as! NSRelationshipDescription)
    
    groupRelationship.destinationEntity = relationshipDescription
    groupSetRelationship.destinationEntity = relationshipGroupDescription
    relationshipGroupProperties.append(groupRelationship.copy() as! NSRelationshipDescription)
    relationshipProperties.append(groupSetRelationship.copy() as! NSRelationshipDescription)
    
    groupRelationship.destinationEntity = actionDescription
    groupSetRelationship.destinationEntity = actionGroupDescription
    actionGroupProperties.append(groupRelationship.copy() as! NSRelationshipDescription)
    actionProperties.append(groupSetRelationship.copy() as! NSRelationshipDescription)
    
    // Inverse relationship for Subjects -- B.
    let actionSubjectSetRelationship = NSRelationshipDescription()
    actionSubjectSetRelationship.name = "subjectSet"
    actionSubjectSetRelationship.minCount = 0
    actionSubjectSetRelationship.maxCount = 0
    actionSubjectSetRelationship.isOptional = false
    actionSubjectSetRelationship.deleteRule = .noActionDeleteRule
    actionSubjectSetRelationship.destinationEntity = entityDescription
    
    let actionSubjectRelationship = NSRelationshipDescription()
    actionSubjectRelationship.name = "actionSubjectSet"
    actionSubjectRelationship.minCount = 0
    actionSubjectRelationship.maxCount = 0
    actionSubjectRelationship.isOptional = false
    actionSubjectRelationship.deleteRule = .noActionDeleteRule
    actionSubjectRelationship.destinationEntity = actionDescription
    actionSubjectRelationship.inverseRelationship = actionSubjectSetRelationship
    actionSubjectSetRelationship.inverseRelationship = actionSubjectRelationship
    
    entityProperties.append(actionSubjectRelationship.copy() as! NSRelationshipDescription)
    actionProperties.append(actionSubjectSetRelationship.copy() as! NSRelationshipDescription)
    // Inverse relationship for Subjects -- E.
    
    // Inverse relationship for Objects -- B.
    let actionObjectSetRelationship = NSRelationshipDescription()
    actionObjectSetRelationship.name = "objectSet"
    actionObjectSetRelationship.minCount = 0
    actionObjectSetRelationship.maxCount = 0
    actionObjectSetRelationship.isOptional = false
    actionObjectSetRelationship.deleteRule = .noActionDeleteRule
    actionObjectSetRelationship.destinationEntity = entityDescription
    
    let actionObjectRelationship = NSRelationshipDescription()
    actionObjectRelationship.name = "actionObjectSet"
    actionObjectRelationship.minCount = 0
    actionObjectRelationship.maxCount = 0
    actionObjectRelationship.isOptional = false
    actionObjectRelationship.deleteRule = .noActionDeleteRule
    actionObjectRelationship.destinationEntity = actionDescription
    actionObjectRelationship.inverseRelationship = actionObjectSetRelationship
    actionObjectSetRelationship.inverseRelationship = actionObjectRelationship
    
    entityProperties.append(actionObjectRelationship.copy() as! NSRelationshipDescription)
    actionProperties.append(actionObjectSetRelationship.copy() as! NSRelationshipDescription)
    // Inverse relationship for Objects -- E.
    
    // Inverse relationship for Subjects -- B.
    let relationshipSubjectSetRelationship = NSRelationshipDescription()
    relationshipSubjectSetRelationship.name = "subject"
    relationshipSubjectSetRelationship.minCount = 1
    relationshipSubjectSetRelationship.maxCount = 1
    relationshipSubjectSetRelationship.isOptional = true
    relationshipSubjectSetRelationship.deleteRule = .noActionDeleteRule
    relationshipSubjectSetRelationship.destinationEntity = entityDescription
    
    let relationshipSubjectRelationship = NSRelationshipDescription()
    relationshipSubjectRelationship.name = "relationshipSubjectSet"
    relationshipSubjectRelationship.minCount = 0
    relationshipSubjectRelationship.maxCount = 0
    relationshipSubjectRelationship.isOptional = false
    relationshipSubjectRelationship.deleteRule = .noActionDeleteRule
    relationshipSubjectRelationship.destinationEntity = relationshipDescription
    
    relationshipSubjectRelationship.inverseRelationship = relationshipSubjectSetRelationship
    relationshipSubjectSetRelationship.inverseRelationship = relationshipSubjectRelationship
    
    entityProperties.append(relationshipSubjectRelationship.copy() as! NSRelationshipDescription)
    relationshipProperties.append(relationshipSubjectSetRelationship.copy() as! NSRelationshipDescription)
    // Inverse relationship for Subjects -- E.
    
    // Inverse relationship for Objects -- B.
    let relationshipObjectSetRelationship = NSRelationshipDescription()
    relationshipObjectSetRelationship.name = "object"
    relationshipObjectSetRelationship.minCount = 1
    relationshipObjectSetRelationship.maxCount = 1
    relationshipObjectSetRelationship.isOptional = true
    relationshipObjectSetRelationship.deleteRule = .noActionDeleteRule
    relationshipObjectSetRelationship.destinationEntity = entityDescription
    
    let relationshipObjectRelationship = NSRelationshipDescription()
    relationshipObjectRelationship.name = "relationshipObjectSet"
    relationshipObjectRelationship.minCount = 0
    relationshipObjectRelationship.maxCount = 0
    relationshipObjectRelationship.isOptional = false
    relationshipObjectRelationship.deleteRule = .noActionDeleteRule
    relationshipObjectRelationship.destinationEntity = relationshipDescription
    relationshipObjectRelationship.inverseRelationship = relationshipObjectSetRelationship
    relationshipObjectSetRelationship.inverseRelationship = relationshipObjectRelationship
    
    entityProperties.append(relationshipObjectRelationship.copy() as! NSRelationshipDescription)
    relationshipProperties.append(relationshipObjectSetRelationship.copy() as! NSRelationshipDescription)
    // Inverse relationship for Objects -- E.
    
    entityDescription.properties = entityProperties as! [NSPropertyDescription]
    entityPropertyDescription.properties = entityPropertyProperties as! [NSPropertyDescription]
    entityTagDescription.properties = entityTagProperties as! [NSPropertyDescription]
    entityGroupDescription.properties = entityGroupProperties as! [NSPropertyDescription]
    
    actionDescription.properties = actionProperties as! [NSPropertyDescription]
    actionPropertyDescription.properties = actionPropertyProperties as! [NSPropertyDescription]
    actionTagDescription.properties = actionTagProperties as! [NSPropertyDescription]
    actionGroupDescription.properties = actionGroupProperties as! [NSPropertyDescription]
    
    relationshipDescription.properties = relationshipProperties as! [NSPropertyDescription]
    relationshipPropertyDescription.properties = relationshipPropertyProperties as! [NSPropertyDescription]
    relationshipTagDescription.properties = relationshipTagProperties as! [NSPropertyDescription]
    relationshipGroupDescription.properties = relationshipGroupProperties as! [NSPropertyDescription]
    
    Model.managedObjectModel = NSManagedObjectModel()
    Model.managedObjectModel?.entities = [
      entityDescription,
      entityPropertyDescription,
      entityTagDescription,
      entityGroupDescription,
      
      relationshipDescription,
      relationshipPropertyDescription,
      relationshipTagDescription,
      relationshipGroupDescription,
      
      actionDescription,
      actionPropertyDescription,
      actionTagDescription,
      actionGroupDescription
    ]
  }()
}