refactor: ♻️ Update Concurreny code comments

Author: uttamukkoji

lib/core/concurrency-queue.js

@@ -12,11 +12,11 @@ export function ConcurrencyQueue ({ axios, config }) {
 
   if (config) {
     if (config.maxRequests && config.maxRequests <= 0) {
-      throw Error('Concurrency Manager Error: minimun concurrent requests is 1')
+      throw Error('Concurrency Manager Error: minimum concurrent requests is 1')
     } else if (config.retryLimit && config.retryLimit <= 0) {
-      throw Error('Retry Policy Error: minimun retry limit is 1')
+      throw Error('Retry Policy Error: minimum retry limit is 1')
     } else if (config.retryDelay && config.retryDelay < 300) {
-      throw Error('Retry Policy Error: minimun retry delay for requests is 300')
+      throw Error('Retry Policy Error: minimum retry delay for requests is 300')
     }
   }
 
@@ -98,6 +98,9 @@ export function ConcurrencyQueue ({ axios, config }) {
   const delay = (time) => {
     if (!this.paused) {
       this.paused = true
+      // Check for current running request.
+      // Wait for running queue to complete.
+      // Wait and prosed the Queued request.
       if (this.running.length > 0) {
         setTimeout(() => {
           delay(time)
@@ -121,13 +124,13 @@ export function ConcurrencyQueue ({ axios, config }) {
 
   const responseErrorHandler = error => {
     let networkError = error.config.retryCount
+    let retryErrorType = null
     if (!this.config.retryOnError || networkError > this.config.retryLimit) {
       return Promise.reject(responseHandler(error))
     }
 
     // Error handling
     let wait = this.config.retryDelay
-    let retryErrorType = null
     const response = error.response
     if (!response) {
       if (error.code === 'ECONNABORTED') {
@@ -147,8 +150,9 @@ export function ConcurrencyQueue ({ axios, config }) {
         return Promise.reject(responseHandler(error))
       }
       this.running.shift()
+      wait = 1000
       // Cooldown the running requests
-      delay(1000)
+      delay(wait)
       error.config.retryCount = networkError
 
       return axios(updateRequestConfig(error, retryErrorType, wait))
@@ -177,7 +181,6 @@ export function ConcurrencyQueue ({ axios, config }) {
         }, wait)
       })
     }
-
     return Promise.reject(responseHandler(error))
   }