From b3fe33b7bf856ab8664518ffe552a803b317aa6c Mon Sep 17 00:00:00 2001
From: Filipa Lacerda <filipa@gitlab.com>
Date: Fri, 1 Feb 2019 16:27:42 +0000
Subject: Searchable input

---
 .../searchable_input_with_results_list.vue         | 151 +++++++++++++++++++++
 .../searchable_input_with_results_list_spec.js     |  31 +++++
 2 files changed, 182 insertions(+)
 create mode 100644 app/assets/javascripts/vue_shared/components/searchable_input_with_results_list.vue
 create mode 100644 spec/javascripts/vue_shared/components/searchable_input_with_results_list_spec.js

diff --git a/app/assets/javascripts/vue_shared/components/searchable_input_with_results_list.vue b/app/assets/javascripts/vue_shared/components/searchable_input_with_results_list.vue
new file mode 100644
index 00000000000..1a73fe60ea0
--- /dev/null
+++ b/app/assets/javascripts/vue_shared/components/searchable_input_with_results_list.vue
@@ -0,0 +1,151 @@
+<script>
+import _ from 'underscore';
+import { GlLoadingIcon, GlButton } from '@gitlab/ui';
+import { __ } from '~/locale';
+import Icon from '~/vue_shared/components/icon.vue';
+import api from '~/api.js';
+
+/**
+ * Creates a searchable input.
+ *
+ * When given a value, it will render it as selected value
+ * Otherwise it will render a placeholder for the search
+ * input.
+ *
+ * When the user types, it will trigger an event to allow
+ * for API queries outside of the component.
+ *
+ * When results are returned, it renders a selectable
+ * list with the suggestions
+ *
+ * When no results are returned, it will render a
+ * button with a `Create` label. When clicked, it will
+ * emit an event to allow for the creation of a new
+ * record.
+ *
+ */
+export default {
+  name: 'SearchableInput',
+  components: {
+    GlButton,
+    GlLoadingIcon,
+    Icon,
+  },
+  props: {
+    value: {
+      type: String,
+      required: false,
+      default: '',
+    },
+    placeholder: {
+      type: String,
+      required: true,
+    },
+    createButtonLabel: {
+      type: String,
+      required: false,
+      default: __('Create'),
+    },
+    results: {
+      type: Array,
+      required: false,
+      default: () => [],
+    },
+    isLoading: {
+      type: Boolean,
+      required: true,
+    },
+  },
+  data() {
+    return {
+      filter: this.value || '',
+    };
+  },
+  watch: {
+    filter(newVal) {
+      if (!_.isEmpty(newVal)) {
+        this.$emit('search', newVal);
+      }
+    },
+  },
+  computed: {
+    composedCreateButtonLabel() {
+      return `${this.createButtonLabel} ${this.filter}`;
+    },
+    /**
+     * The list of suggestions should be open when
+     *  loading is true
+     *  user changed the filter value
+     *  list of results is available
+     *  @returns Boolean
+     */
+    showSuggestions() {
+      console.log(!_.isEmpty(this.filter) || this.isLoading || this.results.length);
+
+      return !_.isEmpty(this.filter) || this.isLoading || this.results.length;
+    },
+    /**
+     * Create button is available when
+     * - loading is false, filter is set and no results are available
+     * @returns Boolean
+     */
+    shouldRenderCreateButton() {
+      return !_.isEmpty(this.filter) && !this.isLoading && !this.results.length;
+    },
+  },
+  methods: {
+    clearSearch() {
+      this.filter = '';
+    },
+  },
+};
+</script>
+<template>
+  <div>
+    <div class="input-group position-relative">
+      <icon name="search" class="seach-icon-input"/>
+
+      <input
+        type="text"
+        class="form-control pl-4"
+        :aria-label="placeholder"
+        v-model="filter"
+        :placeholder="placeholder"
+      >
+      <gl-button @click="clearSearch" class="btn-transparent clear-search-input">
+        <icon name="clear"/>
+      </gl-button>
+    </div>
+    <ul class="list-group" v-if="showSuggestions">
+      <li class="list-group-item" v-if="isLoading">
+        <gl-loading-icon />
+      </li>
+      <template v-else-if="results.length" >
+        <li v-for="(result, i) in results" :key="i"  class="list-group-item" >
+          <slot name="result" :result="result">{{ result }}</slot>
+        </li>
+      </template>
+      <li v-else-if="shouldRenderCreateButton"  class="list-group-item" >
+        <gl-button @click="$emit('createClicked', filter)">{{ composedCreateButtonLabel }}</gl-button>
+      </li>
+    </ul>
+  </div>
+</template>
+
+<style>
+.seach-icon-input {
+  position: absolute;
+  z-index: 10;
+  left: 4px;
+  fill: #999999;
+  top: 10px;
+}
+
+.clear-search-input {
+  position: absolute;
+  z-index: 10;
+  fill: #999999;
+  top: 1px;
+  right: 0px;
+}
+</style>
diff --git a/spec/javascripts/vue_shared/components/searchable_input_with_results_list_spec.js b/spec/javascripts/vue_shared/components/searchable_input_with_results_list_spec.js
new file mode 100644
index 00000000000..4aaea46faec
--- /dev/null
+++ b/spec/javascripts/vue_shared/components/searchable_input_with_results_list_spec.js
@@ -0,0 +1,31 @@
+describe('searchable input with results', () => {
+  describe('with value', () => {
+    it('does not render results list', () => {
+
+    });
+  });
+
+  describe('click clear input button', () => {
+    it('resets filter value', () => {});
+  });
+
+  describe('on input change', () => {
+    it('emits search event', () => {
+
+    });
+  });
+
+  describe('while loading', () => {
+
+  });
+
+  describe('with results', () => {});
+
+  describe('without resutls', () => {
+    it('renders a create button', () => {});
+
+    describe('on click create button', () => {
+      it('emits create event', () => {});
+    });
+  });
+});
-- 
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