feat: implement onLaikaReady callback for createGlobalLaikaLink (#33)

Co-authored-by: Donovan Yohan <[email protected]>

src/createGlobalLaikaLink.ts

@@ -7,6 +7,7 @@ export const getLaikaSingleton = memoize(
   (
     globalPropertyName: string = DEFAULT_GLOBAL_PROPERTY_NAME,
     startLoggingImmediately: boolean = false,
+    onLaikaReady?: (laika: Laika) => void,
   ) => {
     // eslint-disable-next-line @typescript-eslint/no-explicit-any,@typescript-eslint/no-unsafe-member-access,no-multi-assign
     const singleton = ((globalThis as any)[globalPropertyName] = new Laika({
@@ -16,6 +17,9 @@ export const getLaikaSingleton = memoize(
     if (startLoggingImmediately) {
       singleton.log.startLogging()
     }
+
+    onLaikaReady?.(singleton)
+
     return singleton
   },
 )
@@ -28,11 +32,16 @@ export function createGlobalLaikaLink({
   clientName = '__unknown__',
   globalPropertyName,
   startLoggingImmediately = false,
+  onLaikaReady,
 }: CreateLaikaLinkOptions) {
   if (clientName === '__unknown__') {
     throw new Error('LaikaLink: clientName is required')
   }
-  const laika = getLaikaSingleton(globalPropertyName, startLoggingImmediately)
+  const laika = getLaikaSingleton(
+    globalPropertyName,
+    startLoggingImmediately,
+    onLaikaReady,
+  )
   return laika.createLink((operation) => {
     operation.setContext({ clientName })
   })

src/typedefs.ts

@@ -5,6 +5,7 @@ import type {
   Observable,
   Operation,
 } from '@apollo/client/core'
+import type { Laika } from './laika'
 
 /** @ignore */
 export type { FetchResult, NextLink, Operation } from '@apollo/client/core'
@@ -123,6 +124,7 @@ export interface CreateLaikaLinkOptions {
   clientName: string
   globalPropertyName?: string
   startLoggingImmediately?: boolean
+  onLaikaReady?: (laika: Laika) => void
 }
 
 // helpers