Add Issuable Move dropdown component

Adds Issuable Move dropdown component to
use with Issuable Sidebars

app/assets/javascripts/vue_shared/components/sidebar/issuable_move_dropdown.vue

+<script>
+import {
+  GlIcon,
+  GlLoadingIcon,
+  GlDropdown,
+  GlDropdownForm,
+  GlDropdownItem,
+  GlSearchBoxByType,
+  GlButton,
+  GlTooltipDirective as GlTooltip,
+} from '@gitlab/ui';
+
+import axios from '~/lib/utils/axios_utils';
+
+export default {
+  components: {
+    GlIcon,
+    GlLoadingIcon,
+    GlDropdown,
+    GlDropdownForm,
+    GlDropdownItem,
+    GlSearchBoxByType,
+    GlButton,
+  },
+  directives: {
+    GlTooltip,
+  },
+  props: {
+    projectsFetchPath: {
+      type: String,
+      required: true,
+    },
+    dropdownButtonTitle: {
+      type: String,
+      required: true,
+    },
+    dropdownHeaderTitle: {
+      type: String,
+      required: true,
+    },
+    moveInProgress: {
+      type: Boolean,
+      required: false,
+      default: false,
+    },
+  },
+  data() {
+    return {
+      projectsListLoading: false,
+      projectsListLoadFailed: false,
+      searchKey: '',
+      projects: [],
+      selectedProject: null,
+      projectItemClick: false,
+    };
+  },
+  computed: {
+    hasNoSearchResults() {
+      return Boolean(
+        !this.projectsListLoading &&
+          !this.projectsListLoadFailed &&
+          this.searchKey &&
+          !this.projects.length,
+      );
+    },
+    failedToLoadResults() {
+      return !this.projectsListLoading && this.projectsListLoadFailed;
+    },
+  },
+  watch: {
+    searchKey(value = '') {
+      this.fetchProjects(value);
+    },
+  },
+  methods: {
+    fetchProjects(search = '') {
+      this.projectsListLoading = true;
+      this.projectsListLoadFailed = false;
+      return axios
+        .get(this.projectsFetchPath, {
+          params: {
+            search,
+          },
+        })
+        .then(({ data }) => {
+          this.projects = data;
+          this.$refs.searchInput.focusInput();
+        })
+        .catch(() => {
+          this.projectsListLoadFailed = true;
+        })
+        .finally(() => {
+          this.projectsListLoading = false;
+        });
+    },
+    isSelectedProject(project) {
+      if (this.selectedProject) {
+        return this.selectedProject.id === project.id;
+      }
+      return false;
+    },
+    /**
+     * This handler is to prevent dropdown
+     * from closing when an item is selected
+     * and emit an event only when dropdown closes.
+     */
+    handleDropdownHide(e) {
+      if (this.projectItemClick) {
+        e.preventDefault();
+        this.projectItemClick = false;
+      } else {
+        this.$emit('dropdown-close');
+      }
+    },
+    handleDropdownCloseClick() {
+      this.$refs.dropdown.hide();
+    },
+    handleProjectSelect(project) {
+      this.selectedProject = project.id === this.selectedProject?.id ? null : project;
+      this.projectItemClick = true;
+    },
+    handleMoveClick() {
+      this.$refs.dropdown.hide();
+      this.$emit('move-issuable', this.selectedProject);
+    },
+  },
+};
+</script>
+
+<template>
+  <div class="block js-issuable-move-block issuable-move-dropdown sidebar-move-issue-dropdown">
+    <div
+      v-gl-tooltip.left.viewport
+      data-testid="move-collapsed"
+      :title="dropdownButtonTitle"
+      class="sidebar-collapsed-icon"
+      @click="$emit('toggle-collapse')"
+    >
+      <gl-icon name="arrow-right" />
+    </div>
+    <gl-dropdown
+      ref="dropdown"
+      :block="true"
+      :disabled="moveInProgress"
+      class="hide-collapsed"
+      toggle-class="js-sidebar-dropdown-toggle"
+      @shown="fetchProjects"
+      @hide="handleDropdownHide"
+    >
+      <template #button-content
+        ><gl-loading-icon v-if="moveInProgress" class="gl-mr-3" />{{
+          dropdownButtonTitle
+        }}</template
+      >
+      <gl-dropdown-form class="gl-pt-0">
+        <div
+          data-testid="header"
+          class="gl-display-flex gl-pb-3 gl-border-1 gl-border-b-solid gl-border-gray-100"
+        >
+          <span class="gl-flex-grow-1 gl-text-center gl-font-weight-bold gl-py-1">{{
+            dropdownHeaderTitle
+          }}</span>
+          <gl-button
+            variant="link"
+            icon="close"
+            class="gl-mr-2 gl-w-auto! gl-p-2!"
+            @click.prevent="handleDropdownCloseClick"
+          />
+        </div>
+        <gl-search-box-by-type
+          ref="searchInput"
+          v-model.trim="searchKey"
+          :placeholder="__('Search project')"
+          :debounce="300"
+        />
+        <div data-testid="content" class="dropdown-content">
+          <gl-loading-icon v-if="projectsListLoading" size="md" class="gl-p-5" />
+          <ul v-else>
+            <gl-dropdown-item
+              v-for="project in projects"
+              :key="project.id"
+              :is-check-item="true"
+              :is-checked="isSelectedProject(project)"
+              @click.stop.prevent="handleProjectSelect(project)"
+              >{{ project.name_with_namespace }}</gl-dropdown-item
+            >
+          </ul>
+          <div v-if="hasNoSearchResults" class="gl-text-center gl-p-3">
+            {{ __('No matching results') }}
+          </div>
+          <div v-if="failedToLoadResults" class="gl-text-center gl-p-3">
+            {{ __('Failed to load projects') }}
+          </div>
+        </div>
+        <div
+          data-testid="footer"
+          class="gl-pt-3 gl-px-3 gl-border-1 gl-border-t-solid gl-border-gray-100"
+        >
+          <gl-button
+            category="primary"
+            variant="success"
+            :disabled="!Boolean(selectedProject)"
+            class="gl-text-center! issuable-move-button"
+            @click="handleMoveClick"
+            >{{ __('Move') }}</gl-button
+          >
+        </div>
+      </gl-dropdown-form>
+    </gl-dropdown>
+  </div>
+</template>

app/assets/stylesheets/pages/issuable.scss

@@ -921,6 +921,25 @@
   }
 }
 
+/*
+ * Following overrides are done to prevent
+ * legacy dropdown styles from influencing
+ * GitLab UI components used within GlDropdown
+ */
+.issuable-move-dropdown {
+  .b-dropdown-form {
+    @include gl-p-0;
+  }
+
+  .gl-search-box-by-type button.gl-clear-icon-button:hover {
+    @include gl-bg-transparent;
+  }
+
+  .issuable-move-button:not(.disabled):hover {
+    @include gl-text-white;
+  }
+}
+
 .right-sidebar-collapsed {
   .sidebar-grouped-item {
     .sidebar-collapsed-icon {

locale/gitlab.pot

@@ -11139,6 +11139,9 @@ msgstr ""
 msgid "Failed to load milestones. Please try again."
 msgstr ""
 
+msgid "Failed to load projects"
+msgstr ""
+
 msgid "Failed to load related branches"
 msgstr ""