feat(useGeolocation): Adding useGeolocation function

Author: microcipcip

README.md

@@ -59,9 +59,11 @@ Vue.use(VueCompositionAPI);
 ## APIs
 
 - Sensors
+  - [`useGeolocation`](./src/components/useGeolocation/stories/useGeolocation.md) — tracks geolocation state of user's device.
+    [![Demo](https://img.shields.io/badge/demo-🚀-yellow.svg)](https://microcipcip.github.io/vue-use-kit/?path=/story/sensors-usegeolocation--demo)
   - [`useHover`](./src/components/useHover/stories/useHover.md) — tracks mouse hover state of a given element.
     [![Demo](https://img.shields.io/badge/demo-🚀-yellow.svg)](https://microcipcip.github.io/vue-use-kit/?path=/story/sensors-usehover--demo)
-   - [`useIntersection`](./src/components/useIntersection/stories/useIntersection.md) — tracks intersection of target element with an ancestor element.
+  - [`useIntersection`](./src/components/useIntersection/stories/useIntersection.md) — tracks intersection of target element with an ancestor element.
     [![Demo](https://img.shields.io/badge/demo-🚀-yellow.svg)](https://microcipcip.github.io/vue-use-kit/?path=/story/sensors-useintersection--demo)
     [![Demo](https://img.shields.io/badge/advanced_demo-🚀-yellow.svg)](https://microcipcip.github.io/vue-use-kit/?path=/story/sensors-useintersection--advanced-demo)
   - [`useMedia`](./src/components/useMedia/stories/useMedia.md) — tracks state of a CSS media query.

src/components/useGeolocation/index.ts

@@ -0,0 +1 @@
+export * from './useGeolocation'

src/components/useGeolocation/stories/UseGeolocationDemo.vue

@@ -0,0 +1,41 @@
+<template>
+  <table class="table is-fullwidth">
+    <thead>
+      <tr>
+        <th>Prop</th>
+        <th>Value</th>
+      </tr>
+    </thead>
+    <tbody>
+      <tr>
+        <td>geo</td>
+        <td>
+          <pre>{{ JSON.stringify(geo, null, 2) }}</pre>
+        </td>
+      </tr>
+      <tr>
+        <td colspan="2">
+          <button class="button is-primary" @click="start" v-if="!isTracking">
+            Enable geolocation tracking
+          </button>
+          <button class="button is-danger" @click="stop" v-else>
+            Disable geolocation tracking
+          </button>
+        </td>
+      </tr>
+    </tbody>
+  </table>
+</template>
+
+<script lang="ts">
+import Vue from 'vue'
+import { useGeolocation } from '@src/vue-use-kit'
+
+export default Vue.extend({
+  name: 'UseGeolocationDemo',
+  setup() {
+    const { isTracking, geo, start, stop } = useGeolocation({}, false)
+    return { isTracking, geo, start, stop }
+  }
+})
+</script>

src/components/useGeolocation/stories/useGeolocation.md

@@ -0,0 +1,74 @@
+# useGeolocation
+
+Vue function that tracks geolocation state of user's device, based on the [Geolocation API](https://developer.mozilla.org/en-US/docs/Web/API/Geolocation_API).
+
+## Reference
+
+```typescript
+interface UseGeolocation {
+  loading: boolean
+  accuracy: number | null
+  altitude: number | null
+  altitudeAccuracy: number | null
+  heading: number | null
+  latitude: number | null
+  longitude: number | null
+  speed: number | null
+  timestamp: number | null
+  error?: Error | PositionError
+}
+```
+
+```typescript
+useGeolocation(
+    options?: PositionOptions,
+    runOnMount?: boolean
+): {
+    isTracking: Ref<boolean>;
+    geo: Ref<UseGeolocation>;
+    start: () => void;
+    stop: () => void;
+}
+```
+
+### Parameters
+
+- `options: PositionOptions` the [geolocation position options](https://developer.mozilla.org/en-US/docs/Web/API/PositionOptions)
+- `runOnMount: boolean` whether to run the geolocation tracking on mount, `true` by default
+
+### Returns
+
+- `isTracking: Ref<boolean>` whether the function is tracking the user's location or not
+- `geo: Ref<UseGeolocation>` the geolocation object
+- `start: Function` the function used for starting the geolocation tracking
+- `stop: Function` the function used for stopping the geolocation tracking
+
+## Usage
+
+```html
+<template>
+  <div>
+    <div>
+      Geo:
+      <pre>{{ JSON.stringify(geo, null, 2) }}</pre>
+    </div>
+    <button @click="start" v-if="!isTracking">
+      Enable geolocation tracking
+    </button>
+    <button @click="stop" v-else>Disable geolocation tracking</button>
+  </div>
+</template>
+
+<script lang="ts">
+  import Vue from 'vue'
+  import { useGeolocation } from 'vue-use-kit'
+
+  export default Vue.extend({
+    name: 'UseGeolocationDemo',
+    setup() {
+      const { isTracking, geo, start, stop } = useGeolocation()
+      return { isTracking, geo, start, stop }
+    }
+  })
+</script>
+```

src/components/useGeolocation/stories/useGeolocation.story.ts

@@ -0,0 +1,28 @@
+import { storiesOf } from '@storybook/vue'
+import path from 'path'
+import StoryTitle from '@src/helpers/StoryTitle.vue'
+import UseGeolocationDemo from './UseGeolocationDemo.vue'
+
+const functionName = 'useGeolocation'
+const functionPath = path.resolve(__dirname, '..')
+const notes = require(`./${functionName}.md`).default
+
+const basicDemo = () => ({
+  components: { StoryTitle, demo: UseGeolocationDemo },
+  template: `
+    <div class="container">
+      <story-title 
+        function-path="${functionPath}" 
+        source-name="${functionName}" 
+        demo-name="UseGeolocationDemo.vue"
+      >
+        <template v-slot:title></template>
+        <template v-slot:intro></template>
+      </story-title>
+      <demo />
+    </div>`
+})
+
+storiesOf('sensors|useGeolocation', module)
+  .addParameters({ notes })
+  .add('Demo', basicDemo)

src/components/useGeolocation/useGeolocation.spec.ts

@@ -0,0 +1,8 @@
+// import { mount } from '@src/helpers/test'
+// import { useGeolocation } from '@src/vue-use-kit'
+
+describe('useGeolocation', () => {
+  it('should do something', () => {
+    // Add test here
+  })
+})

src/components/useGeolocation/useGeolocation.ts

@@ -0,0 +1,101 @@
+import { ref, onMounted, onUnmounted, Ref } from '@src/api'
+
+export interface UseGeolocation {
+  loading: boolean
+  accuracy: number | null
+  altitude: number | null
+  altitudeAccuracy: number | null
+  heading: number | null
+  latitude: number | null
+  longitude: number | null
+  speed: number | null
+  timestamp: number | null
+  error?: Error | PositionError
+}
+
+const defaultOpts = {
+  enableHighAccuracy: false,
+  timeout: Infinity,
+  maximumAge: 0
+}
+
+export function useGeolocation(
+  options: PositionOptions = {},
+  runOnMount = true
+) {
+  options = Object.assign(defaultOpts, options)
+
+  // Note: surprisingly the watchId can be 0 (not positive) so
+  // we have to check if watchId !== null every time
+  let watchId: number | null = null
+
+  const geoInitData = {
+    loading: false,
+    accuracy: null,
+    altitude: null,
+    altitudeAccuracy: null,
+    heading: null,
+    latitude: null,
+    longitude: null,
+    speed: null,
+    timestamp: null
+  }
+
+  const isTracking = ref(false)
+  const geo: Ref<UseGeolocation> = ref({ ...geoInitData })
+
+  const onEventError = (error: PositionError) => {
+    if (watchId === null) return
+    geo.value.loading = false
+    geo.value.error = {
+      code: error.code,
+      message: error.message
+    } as PositionError
+    isTracking.value = false
+  }
+
+  const handleGeolocation = ({ coords, timestamp }: Position) => {
+    geo.value = {
+      loading: false,
+      accuracy: coords.accuracy,
+      altitude: coords.altitude,
+      altitudeAccuracy: coords.altitudeAccuracy,
+      heading: coords.heading,
+      latitude: coords.latitude,
+      longitude: coords.longitude,
+      speed: coords.speed,
+      timestamp
+    }
+    isTracking.value = true
+  }
+
+  const start = () => {
+    if (watchId !== null) return
+    geo.value.loading = true
+    geo.value.timestamp = Date.now()
+
+    navigator.geolocation.getCurrentPosition(
+      handleGeolocation,
+      onEventError,
+      options
+    )
+
+    watchId = navigator.geolocation.watchPosition(
+      handleGeolocation,
+      onEventError,
+      options
+    )
+  }
+
+  const stop = () => {
+    if (watchId === null) return
+    navigator.geolocation.clearWatch(watchId)
+    watchId = null
+    isTracking.value = false
+  }
+
+  onMounted(() => runOnMount && start())
+  onUnmounted(stop)
+
+  return { isTracking, geo, start, stop }
+}

src/vue-use-kit.ts

@@ -3,6 +3,7 @@ export * from './components/getQuery'
 export * from './components/useClickAway'
 export * from './components/useFullscreen'
 
+export * from './components/useGeolocation'
 export * from './components/useHover'
 export * from './components/useIntersection'
 export * from './components/useMedia'