addInterceptor Pipemethod

Description

Action forward middleware:

The addInterceptor is a pre-execution blocking middleware for all actions under the current pipe, adding the middleware in the form of a callback function. ⚠️⚠️⚠️️Action forward middleware supports asynchronous, asynchronous and non-asynchronous action forward middleware in the same queue, if an action is an external action (that is, external wrapped) asynchronous function, The asynchronous action then receives the return value of all asynchronous action forward middleware and selects the last return value; non-external asynchronous action.

Usage

addInterceptor(
  (rootStore, [...paths], actionName, currentStore, actionArguments) => {}
)

Arguments

rootStore (Object/Array): root store paths (Array = []): action path actionName (String): action name currentStore (Object/Array): current store node actionArguments(Array): Action parameters/action forward middleware queue with return value

Returned value

(Array/*): If the array is returned, then the array will change the value of the action's original parameter, and multiple action-forward middleware queues with a return value, giving precedence to the return result of the last action-oriented middleware with a return value as the action parameter, if none of the return values are returned, Then keep the original action parameter unchanged.

Examples

pipe.addInterceptor(
  (root, ...args)=>{
    const actionArgs = args.pop()
    const current = args.pop()
    const actionName = args.pop()
    const path = args
  }
)

iFlow({
  foobar: external(async function (){
     // do async something.
  })
}).addInterceptor(
  async (root, ...args) => {
    const actionArgs = args.pop()
    const current = args.pop()
    const actionName = args.pop()
    const path = args
    const prevReturnValue = await actionArgs
    // do async something.
    return prevReturnValue
  }
)