From cd8da972c392dc00dbf98fbe66c5ad7e272a7900 Mon Sep 17 00:00:00 2001
From: Junji Zhi <junjizhi.to@gmail.com>
Date: Fri, 11 Jun 2021 19:40:04 -0400
Subject: [PATCH] Add spinner support

---
 README.md                                    | 14 ++--
 babel.config.js                              |  2 +-
 dev/serve.vue                                |  3 +-
 src/__tests__/bootstrap-vue-timeline.spec.js | 70 ++++++++++----------
 src/bootstrap-vue-timeline.vue               | 41 +++++++++---
 5 files changed, 75 insertions(+), 55 deletions(-)

diff --git a/README.md b/README.md
index 2080942..3ccc9e5 100644
--- a/README.md
+++ b/README.md
@@ -47,19 +47,16 @@ export default Vue.extend({
         {
           timestamp: Date.parse('2021-05-29T20:20:46.444Z'),
           title: 'Dolore ullamco exercitation commodo',
-          content: 'Esse dolore consectetur aliqua laboris sunt aliqua do non.',
-          link: 'https://example1.com'
+          content: 'Esse dolore consectetur aliqua laboris sunt aliqua do non.'
         },
         {
           timestamp: Date.parse('2021-05-28T20:20:46.444Z'),
-          title: 'Voluptate pariatur dolore laborum eu',
-          link: '#'
+          title: 'Voluptate pariatur dolore laborum eu'
         },
         {
           timestamp: Date.parse('2021-01-28T20:20:46.444Z'),
           title: 'Mollit aliqua velit nostrud ipsum',
-          content: 'Magna officia est fugiat sit esse consectetur labore elit nulla duis consectetur. Et sit velit ad ipsum officia.',
-          link: '#'
+          content: 'Magna officia est fugiat sit esse consectetur labore elit nulla duis consectetur. Et sit velit ad ipsum officia.'
         }
       ]
     }
@@ -74,7 +71,8 @@ export default Vue.extend({
     >
       <b-timeline
         :items="timelineItems"
-        :reverse="false"
+        :reverse="true"
+        :loading="true"
       />
     </b-card>
   </div>
@@ -82,7 +80,7 @@ export default Vue.extend({
 ```
 
 ## Features
-- [ ] Loading spinner
+- [x] Loading spinner
 - [ ] Support item head color variants
 - [x] Support `reverse` props
 - [ ] Support custom icons
diff --git a/babel.config.js b/babel.config.js
index de59089..9af5b52 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -12,5 +12,5 @@ const buildPresets = [
   ],
 ];
 module.exports = {
-  presets: (process.env.NODE_ENV === 'development' ? devPresets : buildPresets),
+  presets: buildPresets,
 };
diff --git a/dev/serve.vue b/dev/serve.vue
index 244c01c..b53b849 100644
--- a/dev/serve.vue
+++ b/dev/serve.vue
@@ -45,7 +45,8 @@ export default Vue.extend({
     >
       <bootstrap-vue-timeline
         :items="timelineItems"
-        :reverse="true"
+        :reverse="false"
+        :loading="true"
       />
     </b-card>
   </div>
diff --git a/src/__tests__/bootstrap-vue-timeline.spec.js b/src/__tests__/bootstrap-vue-timeline.spec.js
index a7e3fa8..495f82c 100644
--- a/src/__tests__/bootstrap-vue-timeline.spec.js
+++ b/src/__tests__/bootstrap-vue-timeline.spec.js
@@ -1,56 +1,58 @@
-import { createLocalVue, mount } from '@vue/test-utils'
-import { BootstrapVue } from 'bootstrap-vue'
+import { createLocalVue, shallowMount } from '@vue/test-utils'
+import { BootstrapVue, BSpinner } from 'bootstrap-vue'
 import BootstrapVueTimeline from '../bootstrap-vue-timeline.vue'
 
 const sampleItems = [
   {
     timestamp: Date.parse('2021-01-28T20:20:46.123Z'),
     title: 'title 1',
-    content: 'content 1',
-    link: 'link 1'
+    content: 'content 1'
   },
   {
     timestamp: Date.parse('2021-01-28T20:20:46.456Z'),
     title: 'title 2',
-    content: 'content 2',
-    link: 'link 1'
+    content: 'content 2'
   },
   {
     timestamp: Date.parse('2021-01-28T20:20:46.444Z'),
     title: 'title 3',
-    content: 'content 3',
-    link: 'link 3'
+    content: 'content 3'
   }
 ]
 
-test('renders a timeline with items', () => {
-  const localVue = createLocalVue()
-  localVue.use(BootstrapVue)
+describe('bootstrap vue timeline component', () => {
+  let localVue
 
-  const wrapper = mount(BootstrapVueTimeline, {
-    localVue,
-    attachTo: document.body,
-    propsData: {
-      items: sampleItems,
-      reverse: false
-    }
+  beforeEach(() => {
+    localVue = createLocalVue()
+    localVue.use(BootstrapVue)
   })
-  const text = wrapper.text()
-  expect(text).toMatch(/content 1[\s\S]*content 2[\s\S]*content 3/)
-})
 
-test('renders a timeline with items in reversed order', () => {
-  const localVue = createLocalVue()
-  localVue.use(BootstrapVue)
+  test('renders a timeline with items in reversed order', () => {
+    const wrapper = shallowMount(BootstrapVueTimeline, {
+      localVue,
+      propsData: {
+        items: sampleItems,
+        reverse: true
+      }
+    })
+    const text = wrapper.text()
+    expect(text).toMatch(/content 3[\s\S]*content 2[\s\S]*content 1/)
+  })
+
+  test('renders a timeline with items with a spinner', () => {
+    const wrapper = shallowMount(BootstrapVueTimeline, {
+      localVue,
+      propsData: {
+        items: sampleItems,
+        reverse: false,
+        loading: true
+      }
+    })
+    const text = wrapper.text()
+    expect(text).toMatch(/content 1[\s\S]*content 2[\s\S]*content 3/)
 
-  const wrapper = mount(BootstrapVueTimeline, {
-    localVue,
-    attachTo: document.body,
-    propsData: {
-      items: sampleItems,
-      reverse: true
-    }
+    const spinner = wrapper.findComponent(BSpinner)
+    expect(spinner.exists()).toBe(true)
   })
-  const text = wrapper.text()
-  expect(text).toMatch(/content 3[\s\S]*content 2[\s\S]*content 1/)
-})
+})
\ No newline at end of file
diff --git a/src/bootstrap-vue-timeline.vue b/src/bootstrap-vue-timeline.vue
index 9fe0bc4..243ba1a 100644
--- a/src/bootstrap-vue-timeline.vue
+++ b/src/bootstrap-vue-timeline.vue
@@ -1,29 +1,40 @@
 <script>
 import Vue from 'vue'
-import { BListGroup, BListGroupItem, BTooltip } from 'bootstrap-vue'
+import { BListGroup, BListGroupItem, BSpinner, BTooltip } from 'bootstrap-vue'
 import { format, formatDistanceToNow } from 'date-fns'
 
 Vue.component('b-list-group', BListGroup)
 Vue.component('b-list-group-item', BListGroupItem)
 Vue.component('b-tooltip', BTooltip)
+Vue.component('b-spinner', BSpinner)
 
 export default /*#__PURE__*/{
   name: 'BootstrapVueTimeline',
   props: {
     items: Array,
-    reverse: Boolean
+    reverse: Boolean,
+    loading: Boolean
   },
-  computed: {
+  methods: {
     orderedItems() {
-      const items = this.items
+      let items = this.items
+      if (this.loading) {
+        items = [...items, {spinner: true, timestamp: "time", title: "loading"}]
+      }
+
       if (this.reverse) {
         items.reverse()
       }
 
       return items
-    }
-  },
-  methods: {
+    },
+    itemsCount() {
+      if (this.loading) {
+        return this.items.length + 1
+      }
+
+      return this.items.length
+    },
     formatAgo(timestamp) {
       return formatDistanceToNow(timestamp, { addSuffix: true })
     },
@@ -40,18 +51,26 @@ export default /*#__PURE__*/{
 <template>
   <b-list-group>
     <b-list-group-item
-      v-for="(item, index) in orderedItems"
+      v-for="(item, index) in orderedItems()"
       :key="item.timestamp + item.title"
-      :href="item.link"
       class="flex-column align-items-start"
     >
       <div class="item-head" />
       <div
-        v-if="index !== items.length - 1"
+        v-if="index !== itemsCount() - 1"
         class="item-tail"
       />
 
-      <div class="item-content">
+      <b-spinner
+        v-if="item.spinner"
+        variant="primary"
+        class="ml-4"
+      />
+
+      <div
+        v-if="!item.spinner"
+        class="item-content"
+      >
         <div class="d-flex w-100 justify-content-between">
           <h5 class="mt-2 mb-1">
             {{ item.title }}