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10 changed files with 243 additions and 205 deletions

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@@ -9,25 +9,41 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Added
- feat: Add new `IdentifierRequiredError` class for missing identifiers.
- feat: Add the option to use the decorators without passing the identifier: In this case, the identifier will be the class name (register) or the property name (inject).
- Add pre release building to release workflow on dev/* branches an version changes.
### Deprecated
### Removed
- feat!: Disable `experimentalDecorators` and `emitDecoratorMetadata` in the `tsconfig.json` file to reflect the change to the stable decorators api.
### Fixed
- feat!: Update `Register`, `RegisterInstance` and `Inject` decorators to reflect the change to the stable decorators api.
- feat!: Update `Inject` Decorator typing to reflect the correct property type.
### Security
## [0.2.0]
### Added
- Add pre release building to release workflow on dev/* branches an version changes.
- feat: Introduced a new CLI command `tsinjex-generate` to automate the generation of import statements for registered dependencies.
The command scans `.ts` files for `@Register` and `@RegisterInstance` decorators and generates an `auto-imports.ts` file.
This ensures that all registered dependencies are automatically included without requiring manual imports.
The CLI can be executed via `npx tsinjex-generate` or added as a script in `package.json` for easier integration.
### Deprecated
### Removed
### Fixed
### Security
## [0.0.14]
### Added
@@ -59,4 +75,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
---
[unreleased]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.14...HEAD
[0.0.14]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.13...v0.0.14
[0.0.14]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.13...v0.0.14
[0.2.00]: https://github.com/PxaMMaxP/TSinjex/compare/0.0.14...v0.2.0

111
bin/generate-imports.cjs Normal file
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@@ -0,0 +1,111 @@
#!/usr/bin/env node
const fs = require('fs');
const path = require('path');
const yargs = require('yargs');
// CLI argument parsing
const argv = yargs
.option('src', {
alias: 's',
type: 'string',
description: 'Directory to search for files',
default: 'src',
})
.option('output', {
alias: 'o',
type: 'string',
description: 'Path to the output file',
default: 'src/auto-imports.ts',
})
.option('pattern', {
alias: 'p',
type: 'string',
description: 'File pattern to search for (e.g., .ts, .js)',
default: '.ts',
})
.help()
.argv;
// Fixed RegEx patterns for decorator detection
const SEARCH_PATTERNS = [
/^@Register(?:<(.+)?>)?\(\s*["']{1}(.+)?["']{1}\s*,?\s*(true|false)?\s*\)/m, // Matches @Register(...)
/^@RegisterInstance(?:<(.+)?>)?\(\s*["']{1}(.+)?["']{1}\s*,?\s*(.+)?\s*\)/m, // Matches @RegisterInstance(...)
];
const FILE_PATTERN = argv.pattern.startsWith('.') ? argv.pattern : `.${argv.pattern}`; // Ensure the pattern starts with a dot
/**
* Recursively searches for all files in a directory matching the specified pattern.
* @param {string} dirPath - The directory to search.
* @returns {string[]} - List of matching files.
*/
function getAllFiles(dirPath) {
let files = fs.readdirSync(dirPath);
let arrayOfFiles = [];
files.forEach((file) => {
const fullPath = path.join(dirPath, file);
if (fs.statSync(fullPath).isDirectory()) {
arrayOfFiles = arrayOfFiles.concat(getAllFiles(fullPath));
} else if (file.endsWith(FILE_PATTERN)) {
arrayOfFiles.push(fullPath);
}
});
return arrayOfFiles;
}
/**
* Filters files that contain at least one of the specified regex patterns.
* @param {string[]} files - List of files to check.
* @returns {string[]} - Files that contain at least one of the specified patterns.
*/
function findFilesWithPattern(files) {
return files.filter((file) => {
const content = fs.readFileSync(file, 'utf8');
return SEARCH_PATTERNS.some((pattern) => pattern.test(content));
});
}
/**
* Generates an import file containing imports for all found files.
* @param {string[]} files - List of relevant files.
* @returns {string} - Generated import code.
*/
function generateImports(files) {
return files.map((file) => `import '${file.replace(/\\/g, '/')}';`).join('\n') + '\n';
}
/**
* Main function that executes the script.
*/
function main() {
try {
const srcDir = path.resolve(process.cwd(), argv.src);
const outputFile = path.resolve(process.cwd(), argv.output);
if (!fs.existsSync(srcDir)) {
console.error(`❌ Error: The directory '${srcDir}' does not exist.`);
process.exit(1);
}
const allFiles = getAllFiles(srcDir);
const filesWithPattern = findFilesWithPattern(allFiles);
if (filesWithPattern.length === 0) {
console.log(`ℹ️ No ${FILE_PATTERN} files found matching the specified decorator patterns.`);
return;
}
const importContent = generateImports(filesWithPattern);
fs.writeFileSync(outputFile, importContent);
console.log(`✅ Imports successfully generated: ${outputFile}`);
} catch (error) {
console.error('❌ An error occurred:', error.message);
process.exit(1);
}
}
main();

9
package-lock.json generated
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@@ -1,12 +1,12 @@
{
"name": "ts-injex",
"version": "0.1.0-alpha",
"version": "0.0.9",
"lockfileVersion": 3,
"requires": true,
"packages": {
"": {
"name": "ts-injex",
"version": "0.1.0-alpha",
"version": "0.0.9",
"license": "MIT",
"dependencies": {
"eslint-plugin-prettier": "^5.2.1",
@@ -5958,11 +5958,6 @@
"resolved": "https://registry.npmjs.org/react-is/-/react-is-18.3.1.tgz",
"integrity": "sha512-/LLMVyas0ljjAtoYiPqYiL8VWXzUUdThrmU5+n20DZv+a+ClRoevUzw5JxU+Ieh5/c87ytoTBV9G1FiKfNJdmg=="
},
"node_modules/reflect-metadata": {
"version": "0.2.2",
"resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.2.2.tgz",
"integrity": "sha512-urBwgfrvVP/eAyXx4hluJivBKzuEbSQs9rKWCrCkbSxNv8mxPcUZKeuoF3Uy4mJl3Lwprp6yy5/39VWigZ4K6Q=="
},
"node_modules/regexp.prototype.flags": {
"version": "1.5.2",
"resolved": "https://registry.npmjs.org/regexp.prototype.flags/-/regexp.prototype.flags-1.5.2.tgz",

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@@ -1,10 +1,13 @@
{
"name": "ts-injex",
"version": "0.1.0-alpha",
"version": "0.2.0",
"description": "Simple boilerplate code free dependency injection system for TypeScript.",
"type": "module",
"main": "./dist/index.js",
"types": "./dist/index.d.ts",
"bin": {
"tsinjex-generate": "./bin/generate-imports.cjs"
},
"scripts": {
"prepare": "npm run build",
"build": "npm run build:tsc",
@@ -60,4 +63,4 @@
"LICENSE",
"package.json"
]
}
}

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@@ -1,9 +1,9 @@
/* istanbul ignore file */
/* eslint-disable @typescript-eslint/no-explicit-any */
import { Inject } from 'src/decorators/Inject';
import { DependencyResolutionError } from '../interfaces/Exceptions';
import { DependencyResolutionError } from 'src/interfaces/Exceptions';
import { ForceConstructor } from 'src/types/GenericContructor';
import { ITSinjex_, ITSinjex } from '../interfaces/ITSinjex';
import { ForceConstructor } from '../types/GenericContructor';
/**
* Test the Inject decorator.
@@ -67,29 +67,6 @@ export function test_InjectDecorator(
expect(instance.getDependency().value).toBe('test-value-init');
});
it('should inject dependency and run initializer without identifier', () => {
container.register('MockDependencyIdentifier', {
value: 'test-value',
});
class TestClass {
@Inject(undefined, (x: string) => {
(x as unknown as { value: string }).value =
'test-value-init';
return x;
})
MockDependencyIdentifier!: any;
public getDependency() {
return this.MockDependencyIdentifier;
}
}
const instance = new TestClass();
expect(instance.getDependency().value).toBe('test-value-init');
});
it('should throw an error when necessary is true and the initializer throws an error', () => {
let _error: Error | undefined = undefined;
@@ -101,7 +78,7 @@ export function test_InjectDecorator(
class TestClass {
@Inject(
'InitThrowDependencie',
(): any => {
() => {
throw new Error('Initializer error');
},
true,
@@ -298,19 +275,6 @@ export function test_RegisterDecorator(
TestClass,
);
});
it('should register a dependency without an identifier', () => {
@register()
class TestClass {
private readonly _dependency!: any;
public getDependency() {
return this._dependency;
}
}
expect(container.resolve('TestClass')).toBe(TestClass);
});
});
}
@@ -347,23 +311,6 @@ export function test_RegisterInstanceDecorator(
).toBe('instance');
});
it('should register an instance of a dependency with an identifier', () => {
@registerInstance()
class TestClass {
private readonly _dependency!: any;
public getDependency() {
return this._dependency;
}
public mark: string = 'instance';
}
expect(container.resolve<TestClass>('TestClass').mark).toBe(
'instance',
);
});
it('should register an instance of a dependency an run the init function', () => {
@registerInstance(
'InstanceIdentifier',

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@@ -1,27 +1,26 @@
import { TSinjex } from '../classes/TSinjex';
import {
DependencyResolutionError,
IdentifierRequiredError,
InitializationError,
InjectorError,
NoInstantiationMethodError,
} from '../interfaces/Exceptions';
} from 'src/interfaces/Exceptions';
import { TSinjex } from '../classes/TSinjex';
import { Identifier } from '../types/Identifier';
import { InitDelegate } from '../types/InitDelegate';
/**
* A decorator to inject a dependency from a DI (Dependency Injection) container into a class property.
* @template TargetType The type of the class to inject the dependency into.
* @template DependencyType The type of the dependency to be injected.
* @template PropertyType The type of the property to be injected.
* @param identifier The {@link Identifier|identifier} used to resolve the dependencie in the DI container or the property name if not provided.
* @param init An optional initializer {@link InitDelegate|function} to transform the dependency before injection
* @template T The type of the dependency to be injected.
* @template U The type of the property to be injected.
* @param identifier The identifier used to resolve the class in the DI container.
* @see {@link Identifier} for more information on identifiers.
* @param init Optional an initializer function to transform the dependency before injection
* or true to instantiate the dependency if it has a constructor.
* @see {@link InitDelegate} for more information on initializer functions.
* @param necessary If true, throws an error if the dependency is not found.
* @returns The resolved dependency or undefined if the dependency is not necessary
* and not found, or throws an error if the dependency is necessary and not found.
* @throws **Only throws errors if the dependency is necessary.**
* @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
* @throws A {@link DependencyResolutionError} if the dependency is not found.
* @throws A {@link InjectorError} if an error occurs during the injection process.
* @throws A {@link NoInstantiationMethodError} if the dependency does not have a constructor.
@@ -41,83 +40,71 @@ import { InitDelegate } from '../types/InitDelegate';
* }
* ```
*/
export function Inject<TargetType, DependencyType, PropertyType>(
identifier?: Identifier,
init?: InitDelegate<DependencyType, PropertyType> | true,
export function Inject<T, U>(
identifier: Identifier,
init?: InitDelegate<T, U> | true,
necessary = true,
) {
return function (
constructor: undefined,
context: ClassFieldDecoratorContext<TargetType>,
): (
this: TargetType,
initialValue: PropertyType | undefined,
) => PropertyType {
const _identifier = identifier ?? context.name;
if (_identifier == null && necessary === true)
throw new IdentifierRequiredError();
return function (target: unknown, propertyKey: string | symbol): void {
/**
* Function to evaluate the dependency lazily
* to avoid circular dependencies, not found dependencies, etc.
* @returns The resolved dependency or undefined if the dependency is not found.
*/
const resolve = (): DependencyType | undefined => {
return TSinjex.getInstance().resolve<DependencyType>(
_identifier,
necessary,
);
const resolve = (): T | undefined => {
return TSinjex.getInstance().resolve<T>(identifier, necessary);
};
return function (
this: TargetType,
initialValue: PropertyType | undefined,
): PropertyType {
let instance: DependencyType | PropertyType | undefined;
Object.defineProperty(target, propertyKey, {
get() {
let instance: T | U | undefined;
const dependency: DependencyType | undefined = tryAndCatch(
() => resolve(),
necessary,
_identifier,
DependencyResolutionError,
);
const dependency: T | undefined = tryAndCatch(
() => resolve(),
necessary,
identifier,
DependencyResolutionError,
);
if (dependency != null) {
const initFunction: (() => PropertyType) | undefined =
typeof init === 'function' && dependency != null
? (): PropertyType => init(dependency)
: init === true && hasConstructor(dependency)
? (): PropertyType => new dependency() as PropertyType
: undefined;
if (dependency != null) {
const initFunction: (() => U) | undefined =
typeof init === 'function' && dependency != null
? (): U => init(dependency)
: init === true && hasConstructor(dependency)
? (): U => new dependency() as U
: undefined;
if (init == null) instance = dependency;
else if (initFunction != null)
instance = tryAndCatch(
initFunction,
necessary,
_identifier,
InitializationError,
);
else if (necessary)
throw new NoInstantiationMethodError(_identifier);
} else if (necessary)
throw new DependencyResolutionError(_identifier);
if (init == null) instance = dependency;
else if (initFunction != null)
instance = tryAndCatch(
initFunction,
necessary,
identifier,
InitializationError,
);
else if (necessary)
throw new NoInstantiationMethodError(identifier);
} else if (necessary)
throw new DependencyResolutionError(identifier);
/**
* Replace itself with the resolved dependency
* for performance reasons.
*/
Object.defineProperty(this, propertyKey, {
value: instance,
writable: false,
enumerable: false,
configurable: false,
});
return instance;
},
/**
* Replace itself with the resolved dependency
* for performance reasons.
* Make the property configurable to allow replacing it
*/
Object.defineProperty(this, context.name, {
value: instance,
writable: false,
enumerable: false,
configurable: false,
});
// eslint-disable-next-line @typescript-eslint/no-explicit-any
return instance as any;
};
configurable: true,
});
};
}

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@@ -1,14 +1,14 @@
import { TSinjex } from '../classes/TSinjex';
import { IdentifierRequiredError } from '../interfaces/Exceptions';
import { Identifier } from '../types/Identifier';
/**
* A decorator to register a class in the **TSinjex** DI (Dependency Injection) container.
* @template TargetType The type of the class to be registered.
* @param identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
* @param deprecated If true, the dependency is deprecated and a warning is logged only once upon the first resolution of the dependency.
* @param identifier The identifier used to register the class in the DI container.
* @see {@link Identifier} for more information on identifiers.
* @param deprecated If true, the dependency is deprecated and a warning
* is logged only once upon the first resolution of the dependency.
* @returns The decorator function to be applied on the class.
* @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
* @example
* ```ts
* \@Register('MyClassIdentifier')
@@ -19,16 +19,12 @@ import { Identifier } from '../types/Identifier';
*/
export function Register<
TargetType extends new (...args: unknown[]) => InstanceType<TargetType>,
>(identifier?: Identifier, deprecated?: boolean) {
return function (
constructor: TargetType,
context: ClassDecoratorContext<TargetType>,
) {
const _identifier = identifier ?? context.name;
if (_identifier == null) throw new IdentifierRequiredError();
>(identifier: Identifier, deprecated?: boolean) {
return function (constructor: TargetType, ...args: unknown[]): void {
// Get the instance of the DI container
const diContainer = TSinjex.getInstance();
diContainer.register(_identifier, constructor, deprecated);
// Register the class in the DI container
diContainer.register(identifier, constructor, deprecated);
};
}

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@@ -1,16 +1,16 @@
import { TSinjex } from '../classes/TSinjex';
import { IdentifierRequiredError } from '../interfaces/Exceptions';
import { Identifier } from '../types/Identifier';
import { InitDelegate } from '../types/InitDelegate';
/**
* A decorator to register an instance of a class in the DI (Dependency Injection) container.
* @template TargetType The type of the class whose instance is to be registered.
* @param identifier The {@link Identifier|identifier} used to register the class in the DI container or the class name if not provided.
* @param init An optional initializer {@link InitDelegate|function} which get the constructor of the class
* @param identifier The identifier used to register the instance in the DI container.
* @see {@link Identifier} for more information on identifiers.
* @param init An optional initializer function which get the constructor of the class
* as input and returns an instance of the class.
* @see {@link InitDelegate} for more information on initializer functions.
* @returns The decorator function to be applied on the class.
* @throws An {@link IdentifierRequiredError} if the identifier is not provided and the class name is not available.
* @example
* ```ts
* \@RegisterInstance('MyClassInstanceIdentifier', (constructor) => new constructor())
@@ -22,51 +22,43 @@ import { InitDelegate } from '../types/InitDelegate';
export function RegisterInstance<
TargetType extends new (..._args: unknown[]) => InstanceType<TargetType>,
>(
identifier?: Identifier,
identifier: Identifier,
init?: InitDelegate<
TargetType & { new (..._args: unknown[]): InstanceType<TargetType> },
InstanceType<TargetType>
>,
) {
return function (
constructor: TargetType,
context: ClassDecoratorContext<TargetType>,
): void {
const _identifier = identifier ?? context.name;
if (_identifier == null) throw new IdentifierRequiredError();
return function (constructor: TargetType, ...args: unknown[]): void {
// Get the instance of the DI container
const diContainer = TSinjex.getInstance();
let instance: InstanceType<TargetType>;
/**
* Get the instance of the class
* and replace the lazy proxy with the instance
* for performance optimization.
*/
const getAndRegisterInstance = (): void => {
if (instance == null) {
if (init) {
instance = init(constructor);
} else {
instance = new constructor();
}
}
diContainer.register(_identifier, instance);
};
// Create a proxy to instantiate the class when needed (Lazy Initialization)
const lazyProxy: unknown = new Proxy(
let lazyProxy: unknown = new Proxy(
{},
{
get(_target, prop, _receiver) {
getAndRegisterInstance();
get(target, prop, receiver) {
if (instance == null) {
if (init) {
instance = init(constructor);
} else {
instance = new constructor(...args);
}
}
lazyProxy = instance;
// Return the requested property of the instance
return instance[prop as keyof InstanceType<TargetType>];
},
set(_target, prop, value, _receiver) {
getAndRegisterInstance();
set(target, prop, value, receiver) {
if (instance == null) {
if (init) {
instance = init(constructor);
} else {
instance = new constructor(...args);
}
}
lazyProxy = instance;
// Set the requested property of the instance
return (instance[prop as keyof InstanceType<TargetType>] =
@@ -75,6 +67,7 @@ export function RegisterInstance<
},
);
diContainer.register(_identifier, lazyProxy);
// Register the lazy proxy in the DI container
diContainer.register(identifier, lazyProxy);
};
}

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@@ -15,19 +15,6 @@ export class TSinjexError extends Error {
}
}
/**
* Error class for missing identifiers in {@link ITSinjex} methods.
*/
export class IdentifierRequiredError extends TSinjexError {
/**
* Creates a new instance of {@link IdentifierRequiredError}
*/
constructor() {
super('Identifier is required.');
this.name = 'TSinjexIdentifierRequiredError';
}
}
/**
* Error class for dependency resolution errors in {@link ITSinjex}.
* @see {@link ITSinjex.resolve}

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@@ -18,6 +18,8 @@
"importHelpers": true,
"isolatedModules": true,
"resolveJsonModule": true,
"experimentalDecorators": true,
"emitDecoratorMetadata": true,
"strictNullChecks": true,
"strictPropertyInitialization": true,
"lib": [