Function createInstanceInScope

src/core/scope/utils.ts:27–57

(constructor: ConstructorOf<T>, scope: Scope)

}

function createInstanceInScope<T>(constructor: ConstructorOf<T>, scope: Scope): T {
  const paramTypes: ConstructorOf<any>[] =
    Reflect.getMetadata('design:paramtypes', constructor) || []

  // parameters decorated by @Inject
  const paramAnnotations = Reflect.getMetadata('parameters', constructor) || []

  const sameScopeParams: number[] = Reflect.getMetadata(SameScopeMetadataKey, constructor) || []

  const deps = paramTypes.map((type, index) => {
    if (sameScopeParams[index]) {
      return createOrGetInstanceInScope(type, scope)
    }

    if (paramAnnotations[index] !== null) {
      let metadata: any[] = paramAnnotations[index]
      metadata = Array.isArray(metadata) ? metadata : [metadata]
      const inject: Inject | undefined = metadata.find((factory) => factory instanceof Inject)
      if (inject && inject.token) {
        return InjectableFactory.getInstanceByToken(inject.token)
      }
    }

    return InjectableFactory.getInstance(type)
  })

  const newInstance = new constructor(...deps)

  setInstanceInScope(constructor, scope, newInstance)
  return newInstance
}

function setInstanceInScope<T>(constructor: ConstructorOf<T>, scope: Scope, newInstance: Instance) {
  const scopeMap: ScopeMap<Scope, Instance> = map.get(constructor) || new Map()