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<script>
import { GlLoadingIcon, GlSearchBoxByType, GlLink } from '@gitlab/ui';
import fuzzaldrinPlus from 'fuzzaldrin-plus';
import { debounce } from 'lodash';
import createFlash from '~/flash';
import { getIdFromGraphQLId } from '~/graphql_shared/utils';
import { DEFAULT_DEBOUNCE_AND_THROTTLE_MS } from '~/lib/utils/constants';
import { UP_KEY_CODE, DOWN_KEY_CODE, ENTER_KEY_CODE, ESC_KEY_CODE } from '~/lib/utils/keycodes';
import { __ } from '~/locale';
import { DropdownVariant } from './constants';
import projectLabelsQuery from './graphql/project_labels.query.graphql';
import LabelItem from './label_item.vue';
export default {
components: {
GlLoadingIcon,
GlSearchBoxByType,
GlLink,
LabelItem,
},
inject: ['projectPath', 'allowLabelCreate', 'labelsManagePath', 'variant'],
props: {
selectedLabels: {
type: Array,
required: true,
},
allowMultiselect: {
type: Boolean,
required: true,
},
labelsListTitle: {
type: String,
required: true,
},
footerCreateLabelTitle: {
type: String,
required: true,
},
footerManageLabelTitle: {
type: String,
required: true,
},
},
data() {
return {
searchKey: '',
labels: [],
currentHighlightItem: -1,
localSelectedLabels: [...this.selectedLabels],
};
},
apollo: {
labels: {
query: projectLabelsQuery,
variables() {
return {
fullPath: this.projectPath,
searchTerm: this.searchKey,
};
},
skip() {
return this.searchKey.length === 1;
},
update: (data) => data.workspace?.labels?.nodes || [],
async result() {
if (this.$refs.searchInput) {
await this.$nextTick();
this.$refs.searchInput.focusInput();
}
},
error() {
createFlash({ message: __('Error fetching labels.') });
},
},
},
computed: {
isDropdownVariantSidebar() {
return this.variant === DropdownVariant.Sidebar;
},
isDropdownVariantEmbedded() {
return this.variant === DropdownVariant.Embedded;
},
labelsFetchInProgress() {
return this.$apollo.queries.labels.loading;
},
localSelectedLabelsIds() {
return this.localSelectedLabels.map((label) => label.id);
},
visibleLabels() {
if (this.searchKey) {
return fuzzaldrinPlus.filter(this.labels, this.searchKey, {
key: ['title'],
});
}
return this.labels;
},
showNoMatchingResultsMessage() {
return Boolean(this.searchKey) && this.visibleLabels.length === 0;
},
},
watch: {
searchKey(value) {
// When there is search string present
// and there are matching results,
// highlight first item by default.
if (value && this.visibleLabels.length) {
this.currentHighlightItem = 0;
}
},
},
created() {
this.debouncedSearchKeyUpdate = debounce(this.setSearchKey, DEFAULT_DEBOUNCE_AND_THROTTLE_MS);
},
beforeDestroy() {
this.$emit('closeDropdown', this.localSelectedLabels);
this.debouncedSearchKeyUpdate.cancel();
},
methods: {
isLabelSelected(label) {
return this.localSelectedLabelsIds.includes(getIdFromGraphQLId(label.id));
},
/**
* This method scrolls item from dropdown into
* the view if it is off the viewable area of the
* container.
*/
scrollIntoViewIfNeeded() {
const highlightedLabel = this.$refs.labelsListContainer.querySelector('.is-focused');
if (highlightedLabel) {
const container = this.$refs.labelsListContainer.getBoundingClientRect();
const label = highlightedLabel.getBoundingClientRect();
if (label.bottom > container.bottom) {
this.$refs.labelsListContainer.scrollTop += label.bottom - container.bottom;
} else if (label.top < container.top) {
this.$refs.labelsListContainer.scrollTop -= container.top - label.top;
}
}
},
updateSelectedLabels(label) {
if (this.isLabelSelected(label)) {
this.localSelectedLabels = this.localSelectedLabels.filter(
({ id }) => id !== getIdFromGraphQLId(label.id),
);
} else {
this.localSelectedLabels.push({
...label,
id: getIdFromGraphQLId(label.id),
});
}
},
/**
* This method enables keyboard navigation support for
* the dropdown.
*/
handleKeyDown(e) {
if (e.keyCode === UP_KEY_CODE && this.currentHighlightItem > 0) {
this.currentHighlightItem -= 1;
} else if (
e.keyCode === DOWN_KEY_CODE &&
this.currentHighlightItem < this.visibleLabels.length - 1
) {
this.currentHighlightItem += 1;
} else if (e.keyCode === ENTER_KEY_CODE && this.currentHighlightItem > -1) {
this.updateSelectedLabels(this.visibleLabels[this.currentHighlightItem]);
this.searchKey = '';
} else if (e.keyCode === ESC_KEY_CODE) {
this.$emit('closeDropdown', this.localSelectedLabels);
}
if (e.keyCode !== ESC_KEY_CODE) {
// Scroll the list only after highlighting
// styles are rendered completely.
this.$nextTick(() => {
this.scrollIntoViewIfNeeded();
});
}
},
handleLabelClick(label) {
this.updateSelectedLabels(label);
if (!this.allowMultiselect) {
this.$emit('closeDropdown', this.localSelectedLabels);
}
},
setSearchKey(value) {
this.searchKey = value;
},
},
};
</script>
<template>
<div
class="labels-select-contents-list js-labels-list"
data-testid="dropdown-wrapper"
@keydown="handleKeyDown"
>
<div class="dropdown-input" @click.stop="() => {}">
<gl-search-box-by-type
ref="searchInput"
:value="searchKey"
:disabled="labelsFetchInProgress"
data-qa-selector="dropdown_input_field"
data-testid="dropdown-input-field"
@input="debouncedSearchKeyUpdate"
/>
</div>
<div ref="labelsListContainer" class="dropdown-content" data-testid="dropdown-content">
<gl-loading-icon
v-if="labelsFetchInProgress"
class="labels-fetch-loading gl-align-items-center gl-w-full gl-h-full"
size="md"
/>
<ul v-else class="list-unstyled gl-mb-0 gl-word-break-word" data-testid="labels-list">
<label-item
v-for="(label, index) in visibleLabels"
:key="label.id"
:label="label"
:is-label-set="isLabelSelected(label)"
:highlight="index === currentHighlightItem"
@clickLabel="handleLabelClick(label)"
/>
<li
v-show="showNoMatchingResultsMessage"
class="gl-p-3 gl-text-center"
data-testid="no-results"
>
{{ __('No matching results') }}
</li>
</ul>
</div>
<div
v-if="isDropdownVariantSidebar || isDropdownVariantEmbedded"
class="dropdown-footer"
data-testid="dropdown-footer"
>
<ul class="list-unstyled">
<li v-if="allowLabelCreate">
<gl-link
class="gl-display-flex gl-flex-direction-row gl-w-full gl-overflow-break-word label-item"
data-testid="create-label-button"
@click="$emit('toggleDropdownContentsCreateView')"
>
{{ footerCreateLabelTitle }}
</gl-link>
</li>
<li>
<gl-link
:href="labelsManagePath"
class="gl-display-flex gl-flex-direction-row gl-w-full gl-overflow-break-word label-item"
>
{{ footerManageLabelTitle }}
</gl-link>
</li>
</ul>
</div>
</div>
</template>
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