From a79d608cefc98c6e5e637fef26f698016fd8d317 Mon Sep 17 00:00:00 2001
From: Igor Kamyshev <igor@kamyshev.me>
Date: Wed, 24 Apr 2024 13:40:57 +0700
Subject: [PATCH] Add real units

---
 packages/web-api/src/geolocation.ts | 60 ++++++++++++++++++++++++++---
 packages/web-api/src/shared.ts      | 12 +++++-
 2 files changed, 65 insertions(+), 7 deletions(-)

diff --git a/packages/web-api/src/geolocation.ts b/packages/web-api/src/geolocation.ts
index f8520140..c7160999 100644
--- a/packages/web-api/src/geolocation.ts
+++ b/packages/web-api/src/geolocation.ts
@@ -1,4 +1,13 @@
-import { Event, EventCallable, Store } from 'effector';
+import {
+  type Event,
+  type EventCallable,
+  type Store,
+  combine,
+  createEvent,
+  createStore,
+} from 'effector';
+
+import { readonly } from './shared';
 
 type GeolocationParams = {
   maximumAge?: number;
@@ -46,9 +55,9 @@ type CustomProvider = (params: GeolocationParams) => {
 };
 
 type Geolocation = {
-  $location: Store<number | null>;
+  $location: Store<{ latitude: number; longitude: number } | null>;
   $latitude: Store<number | null>;
-  $longitude: Store<{ latitude: number; longitude: number } | null>;
+  $longitude: Store<number | null>;
   request: EventCallable<void>;
   watching: {
     start: EventCallable<void>;
@@ -56,7 +65,7 @@ type Geolocation = {
     $active: Store<boolean>;
   };
   reporting: {
-    failed: Event<unknown>;
+    failed: Event<CustomGeolocationError>;
   };
 };
 
@@ -64,10 +73,49 @@ const BrowserProvider = Symbol('BrowserProvider');
 
 export function trackGeolocation(
   params: GeolocationParams & {
-    providers?: Array<CustomProvider>;
+    providers?: Array<CustomProvider | globalThis.Geolocation>;
   }
 ): Geolocation {
-  return {} as any;
+  // In case of no providers, we will use the default one only
+  const providres = params.providers ?? [BrowserProvider];
+
+  const $location = createStore<{
+    latitude: number;
+    longitude: number;
+  } | null>(null);
+
+  const $longitude = combine(
+    $location,
+    (location) => location?.longitude ?? null
+  );
+
+  const $latitude = combine(
+    $location,
+    (location) => location?.latitude ?? null
+  );
+
+  const request = createEvent();
+
+  const startWatching = createEvent();
+  const stopWatching = createEvent();
+  const $watchingActive = createStore(false);
+
+  const failed = createEvent<CustomGeolocationError>();
+
+  return {
+    $location: readonly($location),
+    $longitude,
+    $latitude,
+    request,
+    watching: {
+      start: startWatching,
+      stop: stopWatching,
+      $active: readonly($watchingActive),
+    },
+    reporting: {
+      failed: readonly(failed),
+    },
+  };
 }
 
 trackGeolocation.browserProvider = BrowserProvider;
diff --git a/packages/web-api/src/shared.ts b/packages/web-api/src/shared.ts
index e9eca7fa..f49213ca 100644
--- a/packages/web-api/src/shared.ts
+++ b/packages/web-api/src/shared.ts
@@ -1,5 +1,8 @@
 import {
-  Event,
+  type Event,
+  type Store,
+  type EventCallable,
+  type StoreWritable,
   attach,
   createEffect,
   createEvent,
@@ -104,3 +107,10 @@ export function setupListener<T>(
 
   return event;
 }
+
+export function readonly<T>(unit: StoreWritable<T>): Store<T>;
+export function readonly<T>(unit: EventCallable<T>): Event<T>;
+
+export function readonly(unit: any) {
+  return unit.map((v: any) => v);
+}