From 1ff584bf8bb0df54cda5965186192ce6a8a08594 Mon Sep 17 00:00:00 2001
From: Piotrek Tomczewski <piotrski@gmail.com>
Date: Wed, 4 Jan 2023 21:47:29 +0100
Subject: [PATCH] feat(publish): add hashtag autocomplete (#778)

---
 components/tiptap/TiptapHashtagList.vue | 68 +++++++++++++++++++++++++
 composables/tiptap.ts                   |  6 +--
 composables/tiptap/suggestion.ts        | 37 ++++++++------
 styles/tiptap.css                       |  3 +-
 4 files changed, 94 insertions(+), 20 deletions(-)
 create mode 100644 components/tiptap/TiptapHashtagList.vue

diff --git a/components/tiptap/TiptapHashtagList.vue b/components/tiptap/TiptapHashtagList.vue
new file mode 100644
index 00000000..15e57c92
--- /dev/null
+++ b/components/tiptap/TiptapHashtagList.vue
@@ -0,0 +1,68 @@
+<script setup lang="ts">
+import type { Tag } from 'masto'
+import CommonScrollIntoView from '../common/CommonScrollIntoView.vue'
+import HashtagInfo from '../search/HashtagInfo.vue'
+
+const { items, command } = defineProps<{
+  items: Tag[]
+  command: Function
+  isPending?: boolean
+}>()
+
+let selectedIndex = $ref(0)
+
+watch(items, () => {
+  selectedIndex = 0
+})
+
+function onKeyDown(event: KeyboardEvent) {
+  if (event.key === 'ArrowUp') {
+    selectedIndex = ((selectedIndex + items.length) - 1) % items.length
+    return true
+  }
+  else if (event.key === 'ArrowDown') {
+    selectedIndex = (selectedIndex + 1) % items.length
+    return true
+  }
+  else if (event.key === 'Enter') {
+    selectItem(selectedIndex)
+    return true
+  }
+
+  return false
+}
+
+function selectItem(index: number) {
+  const item = items[index]
+  if (item)
+    command({ id: item.name })
+}
+
+defineExpose({
+  onKeyDown,
+})
+</script>
+
+<template>
+  <div v-if="isPending || items.length" relative bg-base text-base shadow border="~ base rounded" text-sm py-2 overflow-x-hidden overflow-y-auto max-h-100>
+    <template v-if="isPending">
+      <div flex gap-1 items-center p2 animate-pulse>
+        <div i-ri:loader-2-line animate-spin />
+        <span>Fetching...</span>
+      </div>
+    </template>
+    <template v-if="items.length">
+      <CommonScrollIntoView
+        v-for="(item, index) in items" :key="index"
+        :active="index === selectedIndex"
+        as="button"
+        :class="index === selectedIndex ? 'bg-active' : 'text-secondary'"
+        block m0 w-full text-left px2 py1
+        @click="selectItem(index)"
+      >
+        <HashtagInfo :hashtag="item" />
+      </CommonScrollIntoView>
+    </template>
+  </div>
+  <div v-else />
+</template>
diff --git a/composables/tiptap.ts b/composables/tiptap.ts
index fa610a31..fe3d9ae0 100644
--- a/composables/tiptap.ts
+++ b/composables/tiptap.ts
@@ -12,7 +12,7 @@ import Code from '@tiptap/extension-code'
 import { Plugin } from 'prosemirror-state'
 
 import type { Ref } from 'vue'
-import { HashSuggestion, MentionSuggestion } from './tiptap/suggestion'
+import { HashtagSuggestion, MentionSuggestion } from './tiptap/suggestion'
 import { CodeBlockShiki } from './tiptap/shiki'
 import { CustomEmoji } from './tiptap/custom-emoji'
 import { Emoji } from './tiptap/emoji'
@@ -54,9 +54,9 @@ export function useTiptap(options: UseTiptapOptions) {
         suggestion: MentionSuggestion,
       }),
       Mention
-        .extend({ name: 'hastag' })
+        .extend({ name: 'hashtag' })
         .configure({
-          suggestion: HashSuggestion,
+          suggestion: HashtagSuggestion,
         }),
       Placeholder.configure({
         placeholder: placeholder.value,
diff --git a/composables/tiptap/suggestion.ts b/composables/tiptap/suggestion.ts
index 7b8975e7..7445164a 100644
--- a/composables/tiptap/suggestion.ts
+++ b/composables/tiptap/suggestion.ts
@@ -3,7 +3,9 @@ import tippy from 'tippy.js'
 import { VueRenderer } from '@tiptap/vue-3'
 import type { SuggestionOptions } from '@tiptap/suggestion'
 import { PluginKey } from 'prosemirror-state'
+import type { Component } from 'vue'
 import TiptapMentionList from '~/components/tiptap/TiptapMentionList.vue'
+import TiptapHashtagList from '~/components/tiptap/TiptapHashtagList.vue'
 
 export const MentionSuggestion: Partial<SuggestionOptions> = {
   pluginKey: new PluginKey('mention'),
@@ -17,29 +19,32 @@ export const MentionSuggestion: Partial<SuggestionOptions> = {
 
     return results.value.accounts
   },
-  render: createSuggestionRenderer(),
+  render: createSuggestionRenderer(TiptapMentionList),
 }
 
-export const HashSuggestion: Partial<SuggestionOptions> = {
+export const HashtagSuggestion: Partial<SuggestionOptions> = {
   pluginKey: new PluginKey('hashtag'),
   char: '#',
-  items({ query }) {
-    // TODO: query
-    return [
-      'TODO HASH QUERY',
-    ].filter(item => item.toLowerCase().startsWith(query.toLowerCase())).slice(0, 5)
+  async items({ query }) {
+    if (query.length === 0)
+      return []
+
+    const paginator = useMasto().search({ q: query, type: 'hashtags', limit: 25, resolve: true })
+    const results = await paginator.next()
+
+    return results.value.hashtags
   },
-  render: createSuggestionRenderer(),
+  render: createSuggestionRenderer(TiptapHashtagList),
 }
 
-function createSuggestionRenderer(): SuggestionOptions['render'] {
+function createSuggestionRenderer(component: Component): SuggestionOptions['render'] {
   return () => {
-    let component: VueRenderer
+    let renderer: VueRenderer
     let popup: Instance
 
     return {
       onStart(props) {
-        component = new VueRenderer(TiptapMentionList, {
+        renderer = new VueRenderer(component, {
           props,
           editor: props.editor,
         })
@@ -50,7 +55,7 @@ function createSuggestionRenderer(): SuggestionOptions['render'] {
         popup = tippy(document.body, {
           getReferenceClientRect: props.clientRect as GetReferenceClientRect,
           appendTo: () => document.body,
-          content: component.element,
+          content: renderer.element,
           showOnCreate: true,
           interactive: true,
           trigger: 'manual',
@@ -60,11 +65,11 @@ function createSuggestionRenderer(): SuggestionOptions['render'] {
 
       // Use arrow function here because Nuxt will transform it incorrectly as Vue hook causing the build to fail
       onBeforeUpdate: (props) => {
-        component.updateProps({ ...props, isPending: true })
+        renderer.updateProps({ ...props, isPending: true })
       },
 
       onUpdate(props) {
-        component.updateProps({ ...props, isPending: false })
+        renderer.updateProps({ ...props, isPending: false })
 
         if (!props.clientRect)
           return
@@ -79,12 +84,12 @@ function createSuggestionRenderer(): SuggestionOptions['render'] {
           popup?.hide()
           return true
         }
-        return component?.ref?.onKeyDown(props.event)
+        return renderer?.ref?.onKeyDown(props.event)
       },
 
       onExit() {
         popup?.destroy()
-        component?.destroy()
+        renderer?.destroy()
       },
     }
   }
diff --git a/styles/tiptap.css b/styles/tiptap.css
index 606e19f9..5ba87138 100644
--- a/styles/tiptap.css
+++ b/styles/tiptap.css
@@ -6,6 +6,7 @@
   opacity: 0.4;
 }
 
-span[data-type='mention'] {
+span[data-type='mention'],
+span[data-type='hashtag'] {
   --at-apply: text-primary;
 }