Make suggestions interactive

src/components/SearchSuggestions.vue

@@ -1,9 +1,12 @@
 <template>
-    <div
-        class="uk-position-absolute uk-panel uk-box-shadow-large uk-padding-small suggestions-container"
-    >
+    <div class="uk-position-absolute uk-panel uk-box-shadow-large suggestions-container">
         <ul class="uk-list uk-margin-remove uk-text-secondary">
-            <li v-for="(suggestion, i) in searchSuggestions" :key="i">
+            <li
+                v-for="(suggestion, i) in searchSuggestions"
+                :key="i"
+                :class="{ selected: selected === i }"
+                class="uk-margin-remove suggestion"
+            >
                 {{ suggestion }}
             </li>
         </ul>
@@ -11,9 +14,57 @@
 </template>
 
 <script>
+import Constants from "@/Constants.js";
+
 export default {
     props: {
-        searchSuggestions: Array
+        searchText: String
+    },
+    data() {
+        return {
+            selected: 0,
+            searchSuggestions: []
+        };
+    },
+    methods: {
+        onKeyUp(e) {
+            if (e.key === "ArrowUp") {
+                if (this.selected <= 0) {
+                    this.selected = this.searchSuggestions.length - 1;
+                } else {
+                    this.selected -= 1;
+                }
+                e.preventDefault();
+            } else if (e.key === "ArrowDown") {
+                if (this.selected >= this.searchSuggestions.length - 1) {
+                    this.selected = 0;
+                } else {
+                    this.selected += 1;
+                }
+                e.preventDefault();
+            } else {
+                this.refreshSuggestions();
+            }
+        },
+        async refreshSuggestions() {
+            this.searchSuggestions = await this.fetchJson(
+                Constants.BASE_URL + "/suggestions?query=" + encodeURI(this.searchText)
+            );
+            this.searchSuggestions.unshift(this.searchText);
+        }
+    },
+    watch: {
+        selected(newValue, oldValue) {
+            if (newValue !== oldValue && this.searchSuggestions[this.selected]) {
+                this.$emit("searchchange", this.searchSuggestions[this.selected]);
+            }
+        }
+    },
+    mounted() {
+        window.addEventListener("keyup", this.onKeyUp);
+    },
+    beforeUnmount() {
+        window.removeEventListener("keyup", this.onKeyUp);
     }
 };
 </script>
@@ -26,6 +77,13 @@ export default {
     max-width: 640px;
     width: 100%;
     box-sizing: border-box;
+    padding: 5px 0;
+}
+.suggestion {
+    padding: 4px 15px;
+}
+.suggestion.selected {
+    background-color: #393d3d;
 }
 @media screen and (max-width: 959px) {
     .suggestions-container {