From e81d45b4cb6462029661a525315529b02261722d Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Wed, 15 Feb 2023 11:12:23 +0100
Subject: Fix mention detection

---
 client/package.json                               |  1 -
 client/src/app/core/renderer/linkifier.service.ts | 53 +++++++++++++++++++++--
 client/yarn.lock                                  |  5 ---
 3 files changed, 50 insertions(+), 9 deletions(-)

diff --git a/client/package.json b/client/package.json
index 31d9b1e7c..5e4e4845e 100644
--- a/client/package.json
+++ b/client/package.json
@@ -105,7 +105,6 @@
     "intl-messageformat": "^10.1.0",
     "jschannel": "^1.0.2",
     "linkify-html": "^4.0.2",
-    "linkify-plugin-mention": "^4.0.2",
     "linkifyjs": "^4.0.2",
     "lodash-es": "^4.17.4",
     "markdown-it": "13.0.1",
diff --git a/client/src/app/core/renderer/linkifier.service.ts b/client/src/app/core/renderer/linkifier.service.ts
index d99591d6c..5c99722f6 100644
--- a/client/src/app/core/renderer/linkifier.service.ts
+++ b/client/src/app/core/renderer/linkifier.service.ts
@@ -1,13 +1,16 @@
 import { Injectable } from '@angular/core'
 import { getAbsoluteAPIUrl } from '@app/helpers/utils'
+import * as LinkifyJS from 'linkifyjs'
 
 @Injectable()
 export class LinkifierService {
   static CLASSNAME = 'linkified'
 
-  private linkifyModule: any
+  private linkifyModule: typeof LinkifyJS
   private linkifyHtmlModule: any
 
+  private mentionPluginInitialized = false
+
   private linkifyOptions = {
     className: {
       mention: LinkifierService.CLASSNAME + '-mention',
@@ -24,14 +27,58 @@ export class LinkifierService {
     if (!this.linkifyModule) {
       const result = await Promise.all([
         import('linkifyjs'),
-        import('linkify-plugin-mention'),
         import('linkify-html').then(m => (m as any).default)
       ])
 
       this.linkifyModule = result[0]
-      this.linkifyHtmlModule = result[2]
+      this.linkifyHtmlModule = result[1]
+
+      this.buildMentionPlugin()
     }
 
     return this.linkifyHtmlModule(text, this.linkifyOptions)
   }
+
+  private buildMentionPlugin () {
+    if (this.mentionPluginInitialized) return
+
+    const MentionToken = this.linkifyModule.createTokenClass('mention', {
+      isLink: true,
+      toHref () {
+        return '/' + this.toString().slice(1)
+      }
+    })
+
+    this.linkifyModule.registerPlugin('mention', ({ scanner, parser }) => {
+      const { DOT, HYPHEN, UNDERSCORE, AT } = scanner.tokens
+      const { domain } = scanner.tokens.groups
+
+      // Start with @
+      const At = parser.start.tt(AT)
+
+      // Valid mention (not made up entirely of symbols)
+      const Mention = At.tt(UNDERSCORE, MentionToken as any)
+
+      At.ta(domain, Mention)
+      At.tt(UNDERSCORE, Mention)
+
+      // More valid mentions
+      Mention.ta(domain, Mention)
+      Mention.tt(HYPHEN, Mention)
+      Mention.tt(UNDERSCORE, Mention)
+
+      // ADDED: . transitions
+      const MentionDot = Mention.tt(DOT)
+      MentionDot.ta(domain, Mention)
+      MentionDot.tt(HYPHEN, Mention)
+      MentionDot.tt(UNDERSCORE, Mention)
+
+      const MentionAt = Mention.tt(AT)
+      MentionAt.ta(domain, Mention)
+      MentionAt.tt(HYPHEN, Mention)
+      MentionAt.tt(UNDERSCORE, Mention)
+    })
+
+    this.mentionPluginInitialized = true
+  }
 }
diff --git a/client/yarn.lock b/client/yarn.lock
index 1799df7b1..62cf2819d 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -7393,11 +7393,6 @@ linkify-it@^4.0.1:
   dependencies:
     uc.micro "^1.0.1"
 
-linkify-plugin-mention@^4.0.2:
-  version "4.0.2"
-  resolved "https://registry.yarnpkg.com/linkify-plugin-mention/-/linkify-plugin-mention-4.0.2.tgz#866e50d4047ea24fc647ebf706b15b0cd30afa63"
-  integrity sha512-W30NL/uQxZahg6Ao/roZSe8ndXaQ+3UjOwUUtM+dVEOAUH5L6L02eLncH/lZLU3ZBj3VjwfZ+r98gw6Tp/8zEw==
-
 linkifyjs@^4.0.2:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/linkifyjs/-/linkifyjs-4.0.2.tgz#5844ea70f4427004e50036d983b66da50fe13389"
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