container.ts

/**
 * Container options.
 *
 * @deprecated
 */
export interface UseContainerOptions {
    /**
     * If set to true, then default container will be used in the case if given container haven't returned anything.
     */
    fallback?: boolean

    /**
     * If set to true, then default container will be used in the case if given container thrown an exception.
     */
    fallbackOnErrors?: boolean
}

/**
 * @deprecated
 */
export type ContainedType<T> = { new (...args: any[]): T } | Function

/**
 * @deprecated
 */
export interface ContainerInterface {
    get<T>(someClass: ContainedType<T>): T
}

/**
 * Container to be used by this library for inversion control. If container was not implicitly set then by default
 * container simply creates a new instance of the given class.
 *
 * @deprecated
 */
const defaultContainer: ContainerInterface = new (class
    implements ContainerInterface
{
    private instances: { type: Function; object: any }[] = []

    get<T>(someClass: ContainedType<T>): T {
        let instance = this.instances.find((i) => i.type === someClass)
        if (!instance) {
            instance = {
                type: someClass,
                object: new (someClass as new () => T)(),
            }
            this.instances.push(instance)
        }

        return instance.object
    }
})()

let userContainer: ContainerInterface
let userContainerOptions: UseContainerOptions | undefined

/**
 * Sets container to be used by this library.
 *
 * @deprecated
 */
export function useContainer(
    iocContainer: ContainerInterface,
    options?: UseContainerOptions,
) {
    userContainer = iocContainer
    userContainerOptions = options
}

/**
 * Gets the IOC container used by this library.
 *
 * @deprecated
 */
export function getFromContainer<T>(someClass: ContainedType<T>): T {
    if (userContainer) {
        try {
            const instance = userContainer.get(someClass)
            if (instance) return instance

            if (!userContainerOptions || !userContainerOptions.fallback)
                return instance
        } catch (error) {
            if (!userContainerOptions || !userContainerOptions.fallbackOnErrors)
                throw error
        }
    }
    return defaultContainer.get<T>(someClass)
}