ts-ioc-container/esm/token/FunctionToken.js

Fast, lightweight TypeScript dependency injection container with a clean API, scoped lifecycles, decorators, tokens, hooks, lazy injection, customizable providers, and no global container objects.

import { InjectionToken } from './InjectionToken';
export class FunctionToken extends InjectionToken {
    fn;
    _getArgsFn;
    _isLazy;
    constructor(fn, { getArgsFn = (_, { args = [] } = {}) => args, isLazy = false } = {}) {
        super();
        this.fn = fn;
        this._getArgsFn = getArgsFn;
        this._isLazy = isLazy;
    }
    resolve(s, { args = [], lazy } = {}) {
        return this.fn(s, {
            args: this._getArgsFn(s, { args }),
            lazy: this._isLazy || lazy,
        });
    }
    args(...newArgs) {
        const parentFn = this._getArgsFn;
        return new FunctionToken(this.fn, {
            getArgsFn: (s, opts) => [...parentFn(s, opts), ...newArgs],
            isLazy: this._isLazy,
        });
    }
    argsFn(fn) {
        const parentFn = this._getArgsFn;
        return new FunctionToken(this.fn, {
            getArgsFn: (s, opts) => [...parentFn(s, opts), ...fn(s)],
            isLazy: this._isLazy,
        });
    }
    lazy() {
        return new FunctionToken(this.fn, {
            getArgsFn: this._getArgsFn,
            isLazy: true,
        });
    }
}