From df7584f19d97bccc333440e337a7dc138ed2c215 Mon Sep 17 00:00:00 2001
From: Zutatensuppe <oo.para@gmail.com>
Date: Thu, 3 Jun 2021 23:30:08 +0200
Subject: [PATCH] add cheap autocomplete for tags

---
 src/frontend/components/EditImageDialog.vue |  5 +-
 src/frontend/components/NewImageDialog.vue  |  7 +-
 src/frontend/components/TagsInput.vue       | 98 +++++++++++++++++++--
 src/frontend/views/NewGame.vue              | 38 ++++++--
 4 files changed, 135 insertions(+), 13 deletions(-)

diff --git a/src/frontend/components/EditImageDialog.vue b/src/frontend/components/EditImageDialog.vue
index 10743ef..ea8e34f 100644
--- a/src/frontend/components/EditImageDialog.vue
+++ b/src/frontend/components/EditImageDialog.vue
@@ -23,7 +23,7 @@
             <!-- TODO: autocomplete tags -->
             <td><label>Tags</label></td>
             <td>
-              <tags-input v-model="tags" />
+              <tags-input v-model="tags" :autocompleteTags="autocompleteTags" />
             </td>
           </tr>
         </table>
@@ -54,6 +54,9 @@ export default defineComponent({
       type: Object as PropType<Image>,
       required: true,
     },
+    autocompleteTags: {
+      type: Function,
+    },
   },
   emits: {
     bgclick: null,
diff --git a/src/frontend/components/NewImageDialog.vue b/src/frontend/components/NewImageDialog.vue
index 372a395..c9db112 100644
--- a/src/frontend/components/NewImageDialog.vue
+++ b/src/frontend/components/NewImageDialog.vue
@@ -36,7 +36,7 @@ gallery", if possible!
             <!-- TODO: autocomplete tags -->
             <td><label>Tags</label></td>
             <td>
-              <tags-input v-model="tags" />
+              <tags-input v-model="tags" :autocompleteTags="autocompleteTags" />
             </td>
           </tr>
         </table>
@@ -62,6 +62,11 @@ export default defineComponent({
     ResponsiveImage,
     TagsInput,
   },
+  props: {
+    autocompleteTags: {
+      type: Function,
+    },
+  },
   emits: {
     bgclick: null,
     setupGameClick: null,
diff --git a/src/frontend/components/TagsInput.vue b/src/frontend/components/TagsInput.vue
index c6fe16a..e0d4f1f 100644
--- a/src/frontend/components/TagsInput.vue
+++ b/src/frontend/components/TagsInput.vue
@@ -1,19 +1,42 @@
 <template>
   <div>
-    <input class="input" type="text" v-model="input" placeholder="Plants, People" @keydown.enter="add" @keyup="onKeyUp" />
+    <input
+      ref="input"
+      class="input"
+      type="text"
+      v-model="input"
+      placeholder="Plants, People"
+      @change="onChange"
+      @keydown.enter="add"
+      @keyup="onKeyUp"
+      />
+    <div v-if="autocomplete.values" class="autocomplete">
+      <ul>
+        <li
+          v-for="(val,idx) in autocomplete.values"
+          :key="idx"
+          :class="{active: idx===autocomplete.idx}"
+          @click="addVal(val)"
+          >{{val}}</li>
+      </ul>
+    </div>
     <span v-for="(tag,idx) in values" :key="idx" class="bit" @click="rm(tag)">{{tag}} ✖</span>
   </div>
 </template>
 <script lang="ts">
 import { defineComponent, PropType } from 'vue'
+import { Tag } from '../../common/Types'
 
 export default defineComponent({
   name: 'tags-input',
   props: {
     modelValue: {
-      type: Array as PropType<Array<string>>,
+      type: Array as PropType<string[]>,
       required: true,
     },
+    autocompleteTags: {
+      type: Function,
+    },
   },
   emits: {
     'update:modelValue': null,
@@ -21,7 +44,11 @@ export default defineComponent({
   data () {
     return {
       input: '',
-      values: [] as Array<string>,
+      values: [] as string[],
+      autocomplete: {
+        idx: -1,
+        values: [] as string[],
+      },
     }
   },
   created () {
@@ -29,14 +56,39 @@ export default defineComponent({
   },
   methods: {
     onKeyUp (ev: KeyboardEvent) {
+      if (ev.key === 'ArrowDown' && this.autocomplete.values.length > 0) {
+        if (this.autocomplete.idx < this.autocomplete.values.length - 1) {
+          this.autocomplete.idx++
+        }
+        ev.stopPropagation()
+        return false
+      }
+      if (ev.key === 'ArrowUp' && this.autocomplete.values.length > 0) {
+        if (this.autocomplete.idx > 0) {
+          this.autocomplete.idx--
+        }
+        ev.stopPropagation()
+        return false
+      }
       if (ev.key === ',') {
         this.add()
         ev.stopPropagation()
         return false
       }
+
+      if (this.input && this.autocompleteTags) {
+        this.autocomplete.values = this.autocompleteTags(
+          this.input,
+          this.values
+        )
+        this.autocomplete.idx = -1
+      } else {
+        this.autocomplete.values = []
+        this.autocomplete.idx = -1
+      }
     },
-    add () {
-      const newval = this.input.replace(/,/g, '').trim()
+    addVal (value: string) {
+      const newval = value.replace(/,/g, '').trim()
       if (!newval) {
         return
       }
@@ -44,7 +96,16 @@ export default defineComponent({
         this.values.push(newval)
       }
       this.input = ''
+      this.autocomplete.values = []
+      this.autocomplete.idx = -1
       this.$emit('update:modelValue', this.values)
+      ;(this.$refs.input as HTMLInputElement).focus()
+    },
+    add () {
+      const value = this.autocomplete.idx >= 0
+        ? this.autocomplete.values[this.autocomplete.idx]
+        : this.input
+      this.addVal(value)
     },
     rm (val: string) {
       this.values = this.values.filter(v => v !== val)
@@ -57,4 +118,31 @@ export default defineComponent({
 .input {
   margin-bottom: .5em;
 }
+.autocomplete {
+  position: relative;
+}
+.autocomplete ul { list-style: none;
+  padding: 0;
+  margin: 0;
+  position: absolute;
+  left: 0;
+  right: 0;
+  background: #333230;
+  top: -.5em;
+}
+.autocomplete ul li {
+  position: relative;
+  padding: .5em .5em .5em 1.5em;
+  cursor: pointer;
+}
+.autocomplete ul li.active {
+  color: var(--link-hover-color);
+  background: var(--input-bg-color);
+}
+.autocomplete ul li.active:before {
+  content: '▶';
+  display: block;
+  position: absolute;
+  left: .5em;
+}
 </style>
diff --git a/src/frontend/views/NewGame.vue b/src/frontend/views/NewGame.vue
index 1325dae..a960737 100644
--- a/src/frontend/views/NewGame.vue
+++ b/src/frontend/views/NewGame.vue
@@ -31,15 +31,32 @@ in jigsawpuzzles.io
         </select>
       </label>
     </div>
-    <image-library :images="images" @imageClicked="onImageClicked" @imageEditClicked="onImageEditClicked" />
-    <new-image-dialog v-if="dialog==='new-image'" @bgclick="dialog=''" @postToGalleryClick="postToGalleryClick" @setupGameClick="setupGameClick" />
-    <edit-image-dialog v-if="dialog==='edit-image'" @bgclick="dialog=''" @saveClick="onSaveImageClick" :image="image" />
-    <new-game-dialog v-if="image && dialog==='new-game'" @bgclick="dialog=''" @newGame="onNewGame" :image="image" />
+    <image-library
+      :images="images"
+      @imageClicked="onImageClicked"
+      @imageEditClicked="onImageEditClicked" />
+    <new-image-dialog
+      v-if="dialog==='new-image'"
+      :autocompleteTags="autocompleteTags"
+      @bgclick="dialog=''"
+      @postToGalleryClick="postToGalleryClick"
+      @setupGameClick="setupGameClick" />
+    <edit-image-dialog
+      v-if="dialog==='edit-image'"
+      :autocompleteTags="autocompleteTags"
+      @bgclick="dialog=''"
+      @saveClick="onSaveImageClick"
+      :image="image" />
+    <new-game-dialog
+      v-if="image && dialog==='new-game'"
+      @bgclick="dialog=''"
+      @newGame="onNewGame"
+      :image="image" />
   </div>
 </template>
 
 <script lang="ts">
-import { defineComponent } from 'vue'
+import { defineComponent, PropType } from 'vue'
 
 import ImageLibrary from './../components/ImageLibrary.vue'
 import NewImageDialog from './../components/NewImageDialog.vue'
@@ -62,7 +79,7 @@ export default defineComponent({
         tags: [] as string[],
       },
       images: [],
-      tags: [],
+      tags: [] as Tag[],
 
       image: {
         id: 0,
@@ -81,6 +98,15 @@ export default defineComponent({
     await this.loadImages()
   },
   methods: {
+    autocompleteTags (input: string, exclude: string[]): string[] {
+      return this.tags
+        .filter((tag: Tag) => {
+          return !exclude.includes(tag.title)
+            && tag.title.toLowerCase().startsWith(input.toLowerCase())
+        })
+        .slice(0, 10)
+        .map((tag: Tag) => tag.title)
+    },
     toggleTag (t: Tag) {
       if (this.filters.tags.includes(t.slug)) {
         this.filters.tags = this.filters.tags.filter(slug => slug !== t.slug)