Sharkitek Core

Introduction

Sharkitek is a Javascript / TypeScript library designed to ease development of client-side models.

With Sharkitek, you define the architecture of your models by specifying their properties and their types. Then, you can use the defined methods like serialize, deserialize or serializeDiff.

class Example extends Model<Example>
{
	id: number;
	name: string;
	
	protected SDefinition(): ModelDefinition<Example>
	{
		return {
			id: SDefine(SNumeric),
			name: SDefine(SString),
		};
	}
}

Examples

Simple model definition

/**
 * A person.
 */
class Person extends Model<Person>
{
	id: number;
	name: string;
	firstName: string;
	email: string;
	createdAt: Date;
	active: boolean = true;
	
	protected SIdentifier(): ModelIdentifier<Person>
	{
		return "id";
	}
	
	protected SDefinition(): ModelDefinition<Person>
	{
		return {
			name: SDefine(SString),
			firstName: SDefine(SString),
			email: SDefine(SString),
			createdAt: SDefine(SDate),
			active: SDefine(SBool),
		};
	}
}

/**
 * An article.
 */
class Article extends Model<Article>
{
	id: number;
	title: string;
	authors: Author[] = [];
	text: string;
	evaluation: number;

	protected SIdentifier(): ModelIdentifier<Article>
	{
		return "id";
	}

	protected SDefinition(): ModelDefinition<Article>
	{
		return {
			id: SDefine(SNumeric),
			title: SDefine(SString),
			authors: SDefine(SArray(SModel(Author))),
			text: SDefine(SString),
			evaluation: SDefine(SDecimal),
		};
	}
}

API

Types

Types are defined by a class extending Type.

Sharkitek defines some basic types by default, in these classes:

• BoolType: boolean value in the model, boolean value in the serialized object.
• StringType: string in the model, string in the serialized object.
• NumericType: number in the model, number in the serialized object.
• DecimalType: number in the model, formatted string in the serialized object.
• DateType: date in the model, ISO formatted date in the serialized object.
• ArrayType: array in the model, array in the serialized object.
• ModelType: instance of a specific class in the model, object in the serialized object.

When you are defining a Sharkitek property, you must provide its type by instantiating one of these classes.

class Example extends Model<Example>
{
	foo: string;
	
	protected SDefinition(): ModelDefinition<Example>
	{
		return {
			foo: new Definition(new StringType()),
		};
	}
}

To ease the use of these classes and reduce read complexity, some constant variables and functions are defined in the library, following a certain naming convention: "S{type_name}".

• BoolType => SBool
• StringType => SString
• NumericType => SNumeric
• DecimalType => SDecimal
• DateType => SDate
• ArrayType => SArray
• ModelType => SModel

When the types require parameters, the constant is defined as a function. If there is no parameter, then a simple variable is enough.

Type implementers should provide a corresponding variable or function for each defined type. They can even provide multiple functions or constants when predefined parameters. (For example, we could define SStringArray which would be a variable similar to SArray(SString).)

class Example extends Model<Example>
{
	foo: string = undefined;
	
	protected SDefinition(): ModelDefinition<Example>
	{
		return {
			foo: SDefine(SString),
		};
	}
}

Models

serialize()

Serialize the model.

Example:

const serializedObject = model.serialize();

deserialize(serializedObject)

Deserialize the model.

Example:

const model = (new TestModel()).deserialize({
	id: 5,
	title: "Hello World!",
	users: [
		{
			id: 6,
			name: "TEST",
		},
	],
});

serializeDiff()

Serialize the difference between current model state and original one.

Example:

const model = (new TestModel()).deserialize({
	id: 5,
	title: "Hello World!",
	users: [
		{
			id: 6,
			name: "TEST",
		},
	],
});

model.title = "A new title for a new world";

const result = model.serializeDiff();
// if `id` is defined as the model identifier:
// result = { id: 5, title: "A new title for a new world" }
// if `id` is not defined as the model identifier:
// result = { title: "A new title for a new world" }

resetDiff()

Set current properties values as original values.

Example:

const model = (new TestModel()).deserialize({
	id: 5,
	title: "Hello World!",
	users: [
		{
			id: 6,
			name: "TEST",
		},
	],
});

model.title = "A new title for a new world";

model.resetDiff();

const result = model.serializeDiff();
// if `id` is defined as the model identifier:
// result = { id: 5 }
// if `id` is not defined as the model identifier:
// result = {}

save()

Get difference between original values and current ones, then reset it. Similar to call serializeDiff() then resetDiff().

const model = (new TestModel()).deserialize({
	id: 5,
	title: "Hello World!",
	users: [
		{
			id: 6,
			name: "TEST",
		},
	],
});

model.title = "A new title for a new world";

const result = model.save();
// if `id` is defined as the model identifier:
// result = { id: 5, title: "A new title for a new world" }
// if `id` is not defined as the model identifier:
// result = { title: "A new title for a new world" }