refactor: create api client helpers to reuse constructors

src/clients/uploads-api-client.ts

@@ -1,36 +1,20 @@
-import { amazonMarketplaces } from '@scaleleap/amazon-marketplaces'
-import globalAxios, { AxiosError, AxiosInstance, AxiosResponse } from 'axios'
-
 import { UploadsApi } from '../api-models/uploads-api-model'
-import { apiErrorFactory } from '../helpers'
+import { ApiClientHelpers } from '../helpers'
 import { isJsonMime } from '../helpers/is-json-mime'
 import { APIConfigurationParameters } from '../types/api-configuration-parameters'
 
 export class UploadsApiClient extends UploadsApi {
   constructor(parameters?: APIConfigurationParameters) {
-    const { sellingPartner } = amazonMarketplaces.US
-    const basePath: string = sellingPartner ? sellingPartner.region.endpoint : ''
-    let axiosInstance: AxiosInstance
-
-    if (parameters && parameters.axios) {
-      axiosInstance = parameters.axios
-    } else {
-      axiosInstance = globalAxios.create()
-      axiosInstance.interceptors.response.use(
-        (response: AxiosResponse) => response.data,
-        (error: AxiosError) => {
-          throw apiErrorFactory(error)
-        },
-      )
-    }
+    const axios = ApiClientHelpers.assertAxiosInstance(parameters)
+    const basePath = ApiClientHelpers.assertBasePath()
 
     super(
       {
         isJsonMime,
         ...parameters,
       },
       basePath,
-      axiosInstance,
+      axios,
     )
   }
 }

src/helpers/api-client-helpers.ts

@@ -0,0 +1,30 @@
+import { amazonMarketplaces } from '@scaleleap/amazon-marketplaces'
+import globalAxios, { AxiosError, AxiosInstance, AxiosResponse } from 'axios'
+
+import { APIConfigurationParameters } from '../types'
+import { apiErrorFactory } from './api-error-factory'
+
+export class ApiClientHelpers {
+  static assertAxiosInstance(parameters?: APIConfigurationParameters): AxiosInstance {
+    let axiosInstance: AxiosInstance
+
+    if (parameters && parameters.axios) {
+      axiosInstance = parameters.axios
+    } else {
+      axiosInstance = globalAxios.create()
+      axiosInstance.interceptors.response.use(
+        (response: AxiosResponse) => response.data,
+        (error: AxiosError) => {
+          throw apiErrorFactory(error)
+        },
+      )
+    }
+
+    return axiosInstance
+  }
+
+  static assertBasePath(): string {
+    const { sellingPartner } = amazonMarketplaces.US
+    return sellingPartner ? sellingPartner.region.endpoint : ''
+  }
+}

src/helpers/index.ts

@@ -1,3 +1,4 @@
+export * from './api-client-helpers'
 export * from './api-error-factory'
 export * from './decoder'
 export * from './is-json-mime'