Inheritance Map Example

InheritanceMap.js

'use strict';
// Inheritance Map Example

const assert = require('assert');
const { strictEqual, deepStrictEqual } = assert;
const util = require('util');

const inspect = (value) => {
	return util.inspect(value, {
		colors : true,
		compact : false
	})
};

const userTypePrototypeDesc = 'User ETL~DFD: Init';
const createUserType = function () {
	var UserType = function({ email, password } = userData) {
		this.email = email;
		this.password = password;
		return this;
	};
	UserType.prototype.description = userTypePrototypeDesc;
	UserType.prototype.email = '';
	UserType.prototype.password = '';
	return UserType;
};

const UserWithoutPasswordTypePrototypeDesc = 'User ETL~DFD: No Password'; // used for checking, unnecessary

// so... it must be reproducible
const createNewUserWithoutPasswordType = function () {
	const UserWithoutPasswordType = function() {
		// delete this.password;
		// does not work
		// cause property deletion
		// will cast prototype chain
		// backing prop to place
	
		// instead the following will
		// cause we use memory block
		// by setting it to undefined
		// and, moreover, through this
		// we will see our data change
		// cause prop will exist
		// but we changed it to undefined
		// it is not rude, just SOLID
		// and DFD ~ SADT transformations
		// and ETL concept in rush :)
		this.password = undefined;
		return this;
	};
	UserWithoutPasswordType.prototype.description = UserWithoutPasswordTypePrototypeDesc; // used for checking, unnecessary
	return UserWithoutPasswordType;
};

// so... it must be reproducible
const createNewUserDataTypeExampleModType = function () {
	const UserWithExampleModificationType = function(initWith = 'none') {
		this.modificationExampe = `done : ${initWith}`;
		return this;
	};
	return UserWithExampleModificationType;
};

const createNewUserDataTypeExampleModTypeNext = function () {
	const UserWithExampleModificationTypeNext = function(initWith = 'none') {
		this.modificationExampeNext = `next : ${initWith}`;
		return this;
	};
	return UserWithExampleModificationTypeNext;
};


const createMoreDeep = function () {
	const MoreDeep = function(initWith = 'none') {
		this.moreDeep = `moreDeep : ${initWith}`;
		return this;
	};
	return MoreDeep;
};

const createEvenMoreDeep = function () {
	const EvenMoreDeep = function(initWith = 'none') {
		this.evenMoreDeep = `EvenMoreDeep : ${initWith}`;
		return this;
	};
	return EvenMoreDeep;
};

// inherited props collector
const finalizeES5 = function (result = {}) {
	let self = this;
	
	const copyProps = () => {
		Object.entries(self).forEach(([key, value] = entry) => {
			if (!result.hasOwnProperty(key)) {
				if (key !== 'constructor') {
					result[key] = value;
				}
			}
		});
	};
	copyProps();
	
	let proto = Object.getPrototypeOf(self);
	while (proto) {
		if (proto) {
			self = proto;
			copyProps();
			proto = Object.getPrototypeOf(self);
		} else {
			break;
		}
	};
	return result;
};

// inherited props collector ancient style
var finalize = function() {
	var result = {};
	// Important : nested props are also copied !
	for (var i in this) {
		// should check if constructor is the same
		// but for this example just get rid of it
		// cause it is simply not the same
		// for inherited instances
		if (i !== 'constructor') {
			result[i] = this[i];
		}
	}
	return result;
};

// so we should create function
// which will return proper constructor
// of modificatorType constructors
// inherited from existent instance
// meaning existent instance is "this" keyword
const DataModificationConstructor = function (ModificatorType) {
	
	const self = this;
	
	if (!self || !self.constructor) {
		throw new Error('Wrong Modification Pattern!');
	}
	
	if (self instanceof ModificatorType) {
		throw new Error('attempt to repeat the same inheritance');
	}
	
	// console.log('\n\n\n', selfInstance === self, '\n\n\n'); // false
	// console.log('\n\n\n', selfInstance instanceof self.constructor, '\n\n\n'); // true
	
	const ModificatorTypeProto = ModificatorType.prototype;
	const ModificatorTypeConstructor = ModificatorType.prototype.constructor;
	
	var inheritedInstance;
	var dataModificatorInstance;
	
	const DataModificatorInheridedType = function () {
		const UpperClosureType = function () {
		
			const willBeModifiedInstance = this;
			
			const ModificatorInheridedType = function (...args) {
				// const prevCstr = this.constructor;
				
				// make modification itself
				// ModificatorTypeConstructor.call(this, ...args);
				// Object.setPrototypeOf(DataModificatorInheridedType.prototype, ModificatorTypeProto);
				// Object.setPrototypeOf(inheritedInstance, ModificatorTypeProto);
				// Object.setPrototypeOf(dataModificatorInstance, ModificatorTypeProto);
				
				ModificatorType.prototype.constructor.prototype = this;
				// ModificatorType.prototype.constructor.prototype.constructor = ModificatorType;
				inheritedInstance = new ModificatorType(...args);
				
				// TODO : 3) should try to reorganize it
				// leaving inheritedInstance.constructor.prototype untouched
				Object.defineProperty(inheritedInstance.constructor.prototype, 'constructor', {
					value : ModificatorType,
					// TODO : !!! закомментировать и разобраться
					writable : true
				});
				Object.defineProperty(inheritedInstance.constructor.prototype.constructor.prototype.constructor, 'prototype', {
					// might be the same as above
				// Object.defineProperty(inheritedInstance.constructor.prototype.constructor, 'prototype', {
					value : ModificatorInheridedType.prototype
				});
				// inheritedInstance.constructor.prototype.constructor = ModificatorType;
				// inheritedInstance.constructor.prototype.constructor.prototype.constructor.prototype = ModificatorInheridedType.prototype;
				
				return inheritedInstance;
			};
			
			ModificatorInheridedType.prototype = willBeModifiedInstance;
			// ModificatorInheridedType.prototype.constructor = ModificatorInheridedType;
			// the line upper is equal
			// to the line below
			// but, below example is not enumerable
			// and we got rid of this constructor appear in log
			// where "... yes ... this is a sorrow ..."
			Object.defineProperty(ModificatorInheridedType.prototype, 'constructor', {
				value : ModificatorInheridedType,
				// TODO : !!! закомментировать и разобраться
				writable : true
			});
			
			Object.entries(ModificatorTypeProto).forEach(([key, value] = entry) => {
				if (!ModificatorInheridedType.prototype.hasOwnProperty(key)) {
					ModificatorInheridedType.prototype[key] = undefined;
					ModificatorInheridedType.prototype[key] = ModificatorTypeProto[key];
				}
			});
			
			return ModificatorInheridedType;
		
		};
		
		UpperClosureType.prototype = this;
		if (!ModificatorTypeProto.hasOwnProperty('desciption')) {
			UpperClosureType.prototype.description = ModificatorType.prototype.constructor.name;
		}
		
		return new UpperClosureType();
		
	};
	
	DataModificatorInheridedType.prototype = self;
	dataModificatorInstance = new DataModificatorInheridedType();
	// DataModificatorInheridedType.prototype = dataModificatorInstance;
	// DataModificatorInheridedType.prototype.constructor = ModificatorType;
	
	return dataModificatorInstance;
	
};


console.log('\n\n: STARTING :\n\n');

const UserType = createUserType();

const UserTypeModification = 
		DataModificationConstructor.call(Object.create({}), UserType);

debugger;
const userInstance = new UserTypeModification({
	email: '[email protected]',
	password: 123
});


console.log('1. By default userInstance.prototype is not referenced :', userInstance.prototype);
console.log('2. But constructor is, and points to : ', userInstance.constructor.name,
	` : ${UserType.name === userInstance.constructor.name}`);

const userInstanedBefore = inspect(userInstance);
console.log('3. And userInstance value till this moment is :');
console.log(userInstanedBefore);


var callsAmount = 0;
// if we will cast this line
// directly before calling
// const userWithoutPassword = new UserWithoutPasswordTypeModificator();
// it will fail inheritance

// this cycle closure is unnecessary
// just demonstration it still works


const InstanceClosures = [1, 2, 3];
const InstanceClosuresLength = InstanceClosures.length;

const punchlines = {};
const printPunchlines = () => {
	console.log('\n\n\n\n');
	console.log('****************************************************************************************************');
	console.log('\n');
	Object.values(punchlines).forEach(({
		start,
		end
	} = punchline) => {
		console.log('\n\n');
		start();
		console.log();
		end();
	});
	console.log('\n\n\n');
	console.log('****************************************************************************************************');
	console.log('\n');
};
// here we make scoped instances
InstanceClosures
.map(function (num) {

	// just for checking ;^)
	// thought if we will create DataModificationConstructor
	// in this scope, userWithoutPassword will inherit addition property
	// userInstance.addition = num;
	
	const UserWithoutPasswordType = createNewUserWithoutPasswordType();
	
	const UserWithoutPasswordTypeModificator 
		= DataModificationConstructor.call(userInstance, UserWithoutPasswordType);
	
	const userWithoutPassword = new UserWithoutPasswordTypeModificator();
	
	// inherited from the same user instance
	// and with absolutely the same inithal data
	// but with different pointer to that data
	const anotherUserWithoutPassword = new UserWithoutPasswordTypeModificator();
	

	const AdditionalModificatorType = createNewUserDataTypeExampleModType();
	
	const AdditionalModificatorTypeModificator 
		= DataModificationConstructor.call(anotherUserWithoutPassword, AdditionalModificatorType);
	
	const userWithoutPasswordWithAdditionalModification = new AdditionalModificatorTypeModificator(num);
	
	
	
	const AdditionalModificatorTypeNext = createNewUserDataTypeExampleModTypeNext();
	
	const AdditionalModificatorTypeModificatorNext
		= DataModificationConstructor.call(userWithoutPasswordWithAdditionalModification, AdditionalModificatorTypeNext);
	
	const userWithoutPasswordWithAdditionalModificationNext = new AdditionalModificatorTypeModificatorNext(num);


	const MoreDeep = createMoreDeep();
	
	const MoreDeepTypeModificator
		= DataModificationConstructor.call(userWithoutPasswordWithAdditionalModificationNext, MoreDeep);
	
	const moreDeep = new MoreDeepTypeModificator(num);
	
	const EvenMoreDeep = createEvenMoreDeep();
	const EvenMoreDeepTypeModificator
		= DataModificationConstructor.call(moreDeep, EvenMoreDeep);

	const evenMoreDeep = new EvenMoreDeepTypeModificator(num);
	
	debugger;
	
	const finMD = finalize.call(moreDeep);
	const finEMD = finalize.call(evenMoreDeep);
	
	debugger;
	
	
	userWithoutPassword.sign = `userWithoutPassword.sign : ${num}`;
	anotherUserWithoutPassword.sign = `anotherUserWithoutPassword.sign : ${num}`;
	
	
	const inUserType = userWithoutPassword instanceof UserType;
	const inUserWPType = userWithoutPassword instanceof UserWithoutPasswordType;
	const inUserWPTypeModificator = userWithoutPassword instanceof UserWithoutPasswordTypeModificator;
	
	const inBoth = inUserType && inUserWPType;
	
	
	const result = {
		num,
		
		userInstance,
		
		userWithoutPassword,
		anotherUserWithoutPassword,
		
		userWithoutPasswordWithAdditionalModification,
		
		UserWithoutPasswordType,
		UserWithoutPasswordTypeModificator,
		
		inUserType,
		inUserWPType,
		inUserWPTypeModificator,
		inBoth,
	};
	
	punchlines[num] = {
		start : () => {
			console.log(`PUNCHLINE ::: START ::: ${num}`);
			console.log('XXX : userWithoutPassword instanceof UserType : ', inUserType);
			console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordType : ', inUserWPType);
			console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordTypeModificator : ', inUserWPTypeModificator);
			console.log('This tells us, that immediately after Instance Creation everything was : ', inBoth ? 'OK!' : 'FAILED!');
			
			console.log('YYY : userWithoutPasswordWithAdditionalModification instanceof UserType : ',
				userWithoutPasswordWithAdditionalModification instanceof UserType);
			console.log('YYY : userWithoutPasswordWithAdditionalModification instanceof UserWithoutPasswordType : ',
				userWithoutPasswordWithAdditionalModification instanceof UserWithoutPasswordType);
			console.log('YYY : userWithoutPasswordWithAdditionalModification instanceof AdditionalModificatorType : ',
				userWithoutPasswordWithAdditionalModification instanceof AdditionalModificatorType);
			console.log('YYY : userWithoutPasswordWithAdditionalModification instanceof AdditionalModificatorTypeModificator : ',
				userWithoutPasswordWithAdditionalModification instanceof AdditionalModificatorTypeModificator);
			console.log('YYY : userWithoutPasswordWithAdditionalModification.constructor : ',
				userWithoutPasswordWithAdditionalModification.constructor.name);
			
		}
	};
	
	return result;

})
.forEach(({
	num,
	userInstance,
	userWithoutPassword,
	anotherUserWithoutPassword,
	userWithoutPasswordWithAdditionalModification,
	UserWithoutPasswordType,
	UserWithoutPasswordTypeModificator,
	inUserType,
	inUserWPType,
	inUserWPTypeModificator,
	inBoth,
} = result) => {

	// and here we check they are inherited properly

	setTimeout(() => {
		
		callsAmount++;
		
		console.log(`\n\n\n: BOOM ${num} :\n\n`);
		
		const stillInUserType = userWithoutPassword instanceof UserType;
		const stillInUserWPType = userWithoutPassword instanceof UserWithoutPasswordType;
		const stillInUserWPTypeModificator = userWithoutPassword instanceof UserWithoutPasswordTypeModificator;
		
		punchlines[num].end = () => {
			console.log(`PUNCHLINE ::: END ::: ${num}`, 'of', InstanceClosuresLength);
			console.log('XXX : userWithoutPassword instanceof UserType : ',
				stillInUserType, ' : expected : ', inUserType);
			console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordType : ',
				stillInUserWPType, ' : expected : ', inUserWPType);
			console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordTypeModificator : ',
				stillInUserWPTypeModificator, ' : expected : ', inUserWPTypeModificator);
		};
		
		console.log('4. The prototype of userWithoutPassword instance is not referenced also :', userWithoutPassword.prototype);

		const isReferenced = UserWithoutPasswordType.name === userWithoutPassword.constructor.name;
		console.log('5. And the constructor still does, and points to : ', UserWithoutPasswordType.name,
			` : ${isReferenced}`, isReferenced ? ': as expected' : ': not expected');

		console.log('\n');
		

		const userInstanedAfter = inspect(userInstance);
		
		console.log('6.1 And userInstance is as before :', userInstanedAfter === userInstanedBefore ? 'equal ': 'not equal');
		console.log(userInstanedAfter);
		console.log('\n');
		console.log('6.2 userInstance constructor still points to : ', userInstance.constructor.name,
			` : ${UserType.name === userInstance.constructor.name}`);


		console.log('\n\n: AND :\n\n');

		console.log('7.1 userWithoutPassword.email by reference to prototype is : ', userWithoutPassword.email);
		console.log('7.2 userWithoutPassword.hasOwnProperty("email") is : ', userWithoutPassword.hasOwnProperty('email'),
			userWithoutPassword.hasOwnProperty('email') ? ' : unexpected' : ' : as expected'); // false
		console.log('7.3 userWithoutPassword.hasOwnProperty("password") is : ', userWithoutPassword.hasOwnProperty('password'));
		console.log('7.4 userWithoutPassword.hasOwnProperty("constructor") is : ', userWithoutPassword.hasOwnProperty('constructor'),
			userWithoutPassword.hasOwnProperty('constructor') ? ' : unexpected' : ' : as expected'); // false
		console.log('7.5 userWithoutPassword.hasOwnProperty("description") is : ', userWithoutPassword.hasOwnProperty('description'),
			userWithoutPassword.hasOwnProperty('description') ? ' : unexpected' : ' : as expected'); // false
		
		console.log('\n: top :\n');
		console.log('8. userWithoutPassword.password is : ', userWithoutPassword.password, userWithoutPassword.password === undefined ? ' : as expedted' : ' : not expected');


		console.log('\n\n: CHECKING :\n\n');

		const userLogDataAncientWay = finalize.call(userInstance);
		console.log(
			'Logging via Ancient Way [ userInstance ]',
			Object.keys(userLogDataAncientWay),
		);
		console.log(inspect(userLogDataAncientWay));
		const userLogDataNewWay = finalizeES5.call(userInstance);
		console.log(
			'Logging via modern ES Way [ userInstance ]',
			Object.keys(userLogDataNewWay),
		);
		console.log(inspect(userLogDataNewWay));

		
		console.log('\n');
		const userWithoutPasswordLogDataAncientWay = finalize.call(userWithoutPassword);
		console.log(
			'Logging via Ancient Way [ userWithoutPassword ]',
			Object.keys(userWithoutPasswordLogDataAncientWay),
		);
		console.log(inspect(userWithoutPasswordLogDataAncientWay));

		const userWithoutPasswordLogDataNewWay = finalizeES5.call(userWithoutPassword);
		console.log(
			'Logging via modern ES Way [ userWithoutPassword ]',
			Object.keys(userWithoutPasswordLogDataNewWay),
		);
		console.log(inspect(userWithoutPasswordLogDataNewWay));
		
		
		console.log('\n');
		const anotherUserWithoutPasswordLogDataAncientWay = finalize.call(anotherUserWithoutPassword);
		console.log(
			'Logging via Ancient Way [ anotherUserWithoutPassword ]',
			Object.keys(anotherUserWithoutPasswordLogDataAncientWay),
		);
		console.log(inspect(anotherUserWithoutPasswordLogDataAncientWay));

		const anotherUserWithoutPasswordLogDataNewWay = finalizeES5.call(anotherUserWithoutPassword);
		console.log(
			'Logging via modern ES Way [ anotherUserWithoutPassword ]',
			Object.keys(anotherUserWithoutPasswordLogDataNewWay),
		);
		console.log(inspect(anotherUserWithoutPasswordLogDataNewWay));
		
		console.log('\n');
		const userWithoutPasswordWithAdditionalModificationLogData = 
			finalizeES5.call(userWithoutPasswordWithAdditionalModification);
		console.log(
			'Logging via modern ES Way [ userWithoutPasswordWithAdditionalModificationLogData ]',
			Object.keys(userWithoutPasswordWithAdditionalModificationLogData),
		);
		console.log(inspect(userWithoutPasswordWithAdditionalModificationLogData));

		// console.log(userWithoutPasswordLogDataNewWay.hasOwnProperty('constructor'));
		// console.log(userWithoutPassword.hasOwnProperty('constructor'));
		console.log('\n\n');
		
		
		// Does SOLID still exist?
		const comparator = (title, expected, received) => {
			try {
				deepStrictEqual(expected, received);
				return `${title} : passed`;
			} catch (error) {
				return `${title} : failed`;
			}
		};

		console.log(
			comparator(
				'Comparator Equality Keys',
				Object.keys(userWithoutPasswordLogDataAncientWay),
				Object.keys(userWithoutPasswordLogDataNewWay)
			)
		);
		console.log(
			comparator(
				'Comparator Equality Props',
				inspect(userWithoutPasswordLogDataAncientWay),
				inspect(userWithoutPasswordLogDataNewWay)
			)
		);

		console.log(
			comparator(
				'must be still the same, unchanged',
				UserType.prototype.description,
				userTypePrototypeDesc
			), ': UserType.prototype.description :',
				UserType.prototype.description ===
				userTypePrototypeDesc
		);

		console.log(
			comparator(
				'must be still the same, unchanged',
				UserWithoutPasswordType.prototype.description,
				UserWithoutPasswordTypePrototypeDesc
			), ': UserWithoutPasswordType.prototype.desciption :',
				UserWithoutPasswordType.prototype.description ===
				UserWithoutPasswordTypePrototypeDesc
		);

		console.log('userInstance instanceof UserType : ', userInstance instanceof UserType);
		console.log('userInstance ! instanceof UserWithoutPasswordType : ', !(userInstance instanceof UserWithoutPasswordType));
		
		console.log('\n');
		console.log(`PUNCHLINE ::: REPORT ${num}`);
		console.log('XXX : userWithoutPassword instanceof UserType : ',
			userWithoutPassword instanceof UserType, 'expected', inUserType);
		console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordType : ',
			userWithoutPassword instanceof UserWithoutPasswordType, 'expected', inUserWPType);
		console.log('XXX : userWithoutPassword instanceof UserWithoutPasswordTypeModificator : ',
			stillInUserWPTypeModificator, ' : expected : ', inUserWPTypeModificator);
		console.log('\n');
		
		console.log('UserType ! instanceof UserWithoutPasswordType : ', !(UserType instanceof UserWithoutPasswordType));

		console.log('UserType unchanged : ', UserType === userInstance.constructor);
		console.log('UserType.prototype', UserType.prototype);
		console.log('UserType.constructor', UserType.constructor);
		console.log('UserType.constructor.prototype', UserType.constructor.prototype);
		console.log();
		console.log('UserWithoutPasswordType ! instanceof UserType : ', !(UserWithoutPasswordType instanceof UserType));
		console.log('UserWithoutPasswordType unchanged : ', UserWithoutPasswordType === userWithoutPassword.constructor);
		console.log('\nUserWithoutPasswordType.prototype', UserWithoutPasswordType.prototype);
		
		console.log(`\n\t... yes ... this is a sorrow ...
		look for 
			Object.defineProperty(ModificatorInheridedType.prototype, 'constructor'
				upper of this code, and re-comment lines\n`);
		
		console.log('UserWithoutPasswordType.constructor', UserWithoutPasswordType.constructor);
		console.log('UserWithoutPasswordType.constructor.prototype', UserWithoutPasswordType.constructor.prototype);

		console.log('\n\n\t... thought now we have the following : \n');
		
		console.log('userWithoutPassword.constructor : ', userWithoutPassword.constructor.name);
		console.log('userInstance.constructor : ', userInstance.constructor.name);
		
		if (callsAmount === InstanceClosuresLength) {
			printPunchlines();
		}

	}, 50);
});

WooTransformationCardPoC.js

'use strict';

// Transformation Card PoC

const assert = require('assert');
const { strictEqual, deepStrictEqual } = assert;
const util = require('util');

const inspect = (value) => {
	return util.inspect(value, {
		colors : true,
		compact : false
	})
};

const UserType = function ({ email, password } = userData) {
	this.email = email;
	this.password = password;
	return this;
};

UserType.prototype.description = 'User ETL~DFD';
UserType.prototype.email = '';
UserType.prototype.password = '';

// starting
const user = new UserType({
	email: '[email protected]',
	password: 123
});

// const user321 = new UserType({
// 	email: '[email protected]',
// 	password: 321
// });

UserType.WithoutPassword = function () {
	// now this referes to new empty object
	// which we should fill
	UserType;
	UserType.WithoutPassword;
	user;
	// const formerUser = this.constructor.prototype.constructor.prototype;
	this.password = undefined;
	debugger;
	this.constructor.prototype.constructor = UserType.WithoutPassword;
	this.constructor.prototype.constructor.prototype.constructor = UserType;
	debugger;
	// this.constructor.prototype.constructor = UserType.WithoutPassword;
	// return userWP;
};

UserType.WithoutPassword.prototype = user;

// so now UserType.WithoutPassword.prototype is user
// this means UserType.WithoutPassword.prototype.constructor is now UserType;
// and also means UserType.WithoutPassword.prototype.constructor.prototype is UserType.prototype;
// console.log(UserType.WithoutPassword.prototype.constructor.prototype.constructor === UserType);

// mooving it deeper
// UserType.WithoutPassword
// 	.prototype.constructor
// 		.prototype.constructor
// 			.prototype.constructor.prototype =
// UserType.WithoutPassword.prototype;

const userWP = new UserType.WithoutPassword();

console.log('user instanceof UserType', user instanceof UserType);
console.log('userWP instanceof UserType', userWP instanceof UserType);
console.log('userWP instanceof UserType.WithoutPassword', userWP instanceof UserType.WithoutPassword);

console.log('user.constructor.name :', user.constructor.name);
console.log('userWP.constructor.name :', userWP.constructor.name);

user.password = 321;

console.log('UserType.prototype', inspect(UserType.prototype));
console.log('UserType.WithoutPassword.prototype', inspect(UserType.WithoutPassword.prototype));

debugger;