Fix @Retry docs and refactor the code (#167)

* docs(retry): Fix documentation on count of invocation

* refactor(retry): Improve readability

* docs(retry): Fix examples

* refactor(retry): Introduce DEFAULT_DELAY variable

index.html

@@ -1640,7 +1640,7 @@
       <div class="ud-section-content">
         <div class="ud-subtitle">Description:</div>
         <p class="ud-description">
-          Retries execution of the decorated method. The method will be invoked extra x + 1 (where x is the retries
+          Retries execution of the decorated method. The method will be invoked x + 1 times (where x is the retries
           values) in the worst case (when all invocation failed).
           You can provide you own delay time (or delay times array) between the invocations - see details below. Note
           that the default delay between retries is 1000ms.
@@ -1660,10 +1660,10 @@
     delaysArray?: number[];
     retries?: number;
     delay: number;
-    onRetry?: OnRetry;
+    onRetry?: OnRetry | string;
   }
 
-  export type OnRetry = (error: Error, retriesCount: number) => void | string;
+  export type OnRetry = (error: Error, retriesCount: number) => void;
             </pre>
           </div>
         </div>
@@ -1680,7 +1680,7 @@
     constructor(private readonly dataProvider: DataProvider) { }
 
     @retry(3)
-    getData: number): DataDto {
+    getData(): DataDto {
       return this.dataProvider.getData();
     }
   }</pre>
@@ -1689,10 +1689,10 @@
           <div class="ud-code-part">
             <div class="ud-subtitle">Function Example 1:</div>
             <pre class="ud-code">
-  import { retrify } from 'utils-decorators';
+  import { retryfy } from 'utils-decorators';
   import { getData } from './data-provider';
 
-  const debouncedFoo = retrify(getData, 3);</pre>
+  const retriedGetData = retryfy(getData, 3);</pre>
           </div>
         </div>
 
@@ -1708,7 +1708,7 @@
     constructor(private readonly dataProvider: DataProvider) { }
 
     @retry([1000, 2000, 3000])
-    getData: number): DataDto {
+    getData(): DataDto {
       return this.dataProvider.getData();
     }
   }</pre>
@@ -1717,10 +1717,10 @@
           <div class="ud-code-part">
             <div class="ud-subtitle">Function Example 2 (with delays array):</div>
             <pre class="ud-code">
-  import { retrify } from 'utils-decorators';
+  import { retryfy } from 'utils-decorators';
   import { getData } from './data-provider';
 
-  const debouncedFoo = retrify(getData, [1000, 2000, 3000]);</pre>
+  const retriedGetData = retryfy(getData, [1000, 2000, 3000]);</pre>
           </div>
         </div>
 
@@ -1738,28 +1738,37 @@
     @retry({
       retries: 3,
       delay: 1500,
-      onError: (e, retriesCount) => console.log(e, retriesCount),
+      onRetry: (e, retriesCount) => console.log(e, retriesCount),
+    })
+    getData(): DataDto {
+      return this.dataProvider.getData();
+    }
+
+    @retry({
+      retries: 3,
+      delay: 1500,
+      onRetry: 'onRetry',
     })
-    getData: number): DataDto {
+    getData2(): DataDto {
       return this.dataProvider.getData();
     }
 
     onRetry(e: Error, retriesCount: number) {
-      console.log(e, retriesCount)
+      console.log(e, retriesCount);
     }
   }</pre>
           </div>
 
           <div class="ud-code-part">
             <div class="ud-subtitle">Function Example 3 (with configuration object):</div>
             <pre class="ud-code">
-  import { retrify } from 'utils-decorators';
+  import { retryfy } from 'utils-decorators';
   import { getData } from './data-provider';
 
-  const debouncedFoo = retrify(getData, {
+  const retriedGetData = retryfy(getData, {
     retries: 3,
     delay: 1500,
-    onError: (e, retriesCount) => console.log(e, retriesCount),
+    onRetry: (e, retriesCount) => console.log(e, retriesCount),
   });</pre>
           </div>
         </div>

src/retry/retryfy.ts

@@ -2,39 +2,42 @@ import { AsyncMethod } from '../common/model/common.model';
 import { sleep } from '../common/utils/utils';
 import { OnRetry, RetryInput, RetryInputConfig } from './retry.model';
 
+const DEFAULT_DELAY = 1000;
+
 function getRetriesArray(input: RetryInput): number[] {
   if (Array.isArray(input)) {
     return input;
   }
 
   if (!Number.isNaN(input as number) && Number.isInteger(input as number)) {
-    return Array(input as number).fill(1).map(() => 1000);
+    return Array(input as number).fill(DEFAULT_DELAY);
   }
 
   if (typeof input === 'object') {
-    const config = input as RetryInputConfig;
+    const { retries, delaysArray, delay } = input;
 
-    if (config.retries && config.delaysArray) {
+    if (retries && delaysArray) {
       throw new Error('You can not provide both retries and delaysArray');
     }
 
-    if (config.delaysArray) {
-      return config.delaysArray;
+    if (delaysArray) {
+      return delaysArray;
     }
 
-    return Array(input.retries).fill(1).map(() => input.delay ?? 1000);
+    return Array(retries).fill(delay ?? DEFAULT_DELAY);
   }
 
   throw new Error('invalid input');
 }
 
 function getOnRetry(input: RetryInput, context: any): OnRetry {
   if (typeof input === 'object') {
-    if (typeof (input as RetryInputConfig).onRetry === 'string') {
-      return context[(input as RetryInputConfig).onRetry as string].bind(context);
+    const { onRetry } = (input as RetryInputConfig);
+    if (typeof onRetry === 'string') {
+      return context[onRetry].bind(context);
     }
 
-    return (input as RetryInputConfig).onRetry as OnRetry;
+    return onRetry;
   }
 
   return undefined;