1<template>
2  <transition name="fade">
3    <b-progress v-if="!isLoadingComplete">
4      <b-progress-bar
5        striped
6        animated
7        :value="loadingIndicatorValue"
8        :aria-label="$t('global.ariaLabel.progressBar')"
9      />
10    </b-progress>
11  </transition>
12</template>
13
14<script>
15export default {
16  data() {
17    return {
18      loadingIndicatorValue: 0,
19      isLoadingComplete: false,
20      loadingIntervalId: null,
21      timeoutId: null
22    };
23  },
24  created() {
25    this.$root.$on('loader::start', () => {
26      this.startLoadingInterval();
27    });
28    this.$root.$on('loader::end', () => {
29      this.endLoadingInterval();
30    });
31    this.$root.$on('loader::hide', () => {
32      this.hideLoadingBar();
33    });
34  },
35  methods: {
36    startLoadingInterval() {
37      this.clearLoadingInterval();
38      this.clearTimeout();
39      this.loadingIndicatorValue = 0;
40      this.isLoadingComplete = false;
41      this.loadingIntervalId = setInterval(() => {
42        this.loadingIndicatorValue += 1;
43        if (this.loadingIndicatorValue > 100) this.clearLoadingInterval();
44      }, 100);
45    },
46    endLoadingInterval() {
47      this.clearLoadingInterval();
48      this.clearTimeout();
49      this.loadingIndicatorValue = 100;
50      this.timeoutId = setTimeout(() => {
51        // Let animation complete before hiding
52        // the loading bar
53        this.isLoadingComplete = true;
54      }, 1000);
55    },
56    hideLoadingBar() {
57      this.clearLoadingInterval();
58      this.clearTimeout();
59      this.loadingIndicatorValue = 0;
60      this.isLoadingComplete = true;
61    },
62    clearLoadingInterval() {
63      if (this.loadingIntervalId) clearInterval(this.loadingIntervalId);
64      this.loadingIntervalId = null;
65    },
66    clearTimeout() {
67      if (this.timeoutId) clearTimeout(this.timeoutId);
68      this.timeoutId = null;
69    }
70  }
71};
72</script>
73
74<style lang="scss" scoped>
75.progress {
76  position: absolute;
77  left: 0;
78  right: 0;
79  bottom: -0.4rem;
80  opacity: 1;
81  transition: opacity $duration--moderate-01 $standard-easing--productive;
82  height: 0.4rem;
83  &.fade-enter,
84  &.fade-leave-to {
85    opacity: 0;
86  }
87}
88.progress-bar {
89  background-color: $loading-color;
90}
91</style>
92