From 2539932e16129992a2c0889b4ff527c265a8e2c7 Mon Sep 17 00:00:00 2001
From: Chocobozzz <chocobozzz@cpy.re>
Date: Thu, 27 May 2021 15:59:55 +0200
Subject: Instance homepage support (#4007)

* Prepare homepage parsers

* Add ability to update instance hompage

* Add ability to set homepage as landing page

* Add homepage preview in admin

* Dynamically update left menu for homepage

* Inject home content in homepage

* Add videos list and channel miniature custom markup

* Remove unused elements in markup service
---
 .../shared-forms/markdown-textarea.component.ts    | 45 ++++++++++++++++++----
 1 file changed, 38 insertions(+), 7 deletions(-)

(limited to 'client/src/app/shared/shared-forms/markdown-textarea.component.ts')

diff --git a/client/src/app/shared/shared-forms/markdown-textarea.component.ts b/client/src/app/shared/shared-forms/markdown-textarea.component.ts
index 9b3ab9cf3..a233a4205 100644
--- a/client/src/app/shared/shared-forms/markdown-textarea.component.ts
+++ b/client/src/app/shared/shared-forms/markdown-textarea.component.ts
@@ -1,9 +1,10 @@
-import { ViewportScroller } from '@angular/common'
 import truncate from 'lodash-es/truncate'
 import { Subject } from 'rxjs'
 import { debounceTime, distinctUntilChanged } from 'rxjs/operators'
+import { ViewportScroller } from '@angular/common'
 import { Component, ElementRef, forwardRef, Input, OnInit, ViewChild } from '@angular/core'
 import { ControlValueAccessor, NG_VALUE_ACCESSOR } from '@angular/forms'
+import { SafeHtml } from '@angular/platform-browser'
 import { MarkdownService, ScreenService } from '@app/core'
 
 @Component({
@@ -21,18 +22,27 @@ import { MarkdownService, ScreenService } from '@app/core'
 
 export class MarkdownTextareaComponent implements ControlValueAccessor, OnInit {
   @Input() content = ''
+
   @Input() classes: string[] | { [klass: string]: any[] | any } = []
+
   @Input() textareaMaxWidth = '100%'
   @Input() textareaHeight = '150px'
+
   @Input() truncate: number
+
   @Input() markdownType: 'text' | 'enhanced' = 'text'
+  @Input() customMarkdownRenderer?: (text: string) => Promise<string | HTMLElement>
+
   @Input() markdownVideo = false
+
   @Input() name = 'description'
 
   @ViewChild('textarea') textareaElement: ElementRef
+  @ViewChild('previewElement') previewElement: ElementRef
+
+  truncatedPreviewHTML: SafeHtml | string = ''
+  previewHTML: SafeHtml | string = ''
 
-  truncatedPreviewHTML = ''
-  previewHTML = ''
   isMaximized = false
 
   maximizeInText = $localize`Maximize editor`
@@ -115,10 +125,31 @@ export class MarkdownTextareaComponent implements ControlValueAccessor, OnInit {
   }
 
   private async markdownRender (text: string) {
-    const html = this.markdownType === 'text' ?
-      await this.markdownService.textMarkdownToHTML(text) :
-      await this.markdownService.enhancedMarkdownToHTML(text)
+    let html: string
+
+    if (this.customMarkdownRenderer) {
+      const result = await this.customMarkdownRenderer(text)
+
+      if (result instanceof HTMLElement) {
+        html = ''
+
+        const wrapperElement = this.previewElement.nativeElement as HTMLElement
+        wrapperElement.innerHTML = ''
+        wrapperElement.appendChild(result)
+        return
+      }
+
+      html = result
+    } else if (this.markdownType === 'text') {
+      html = await this.markdownService.textMarkdownToHTML(text)
+    } else {
+      html = await this.markdownService.enhancedMarkdownToHTML(text)
+    }
+
+    if (this.markdownVideo) {
+      html = this.markdownService.processVideoTimestamps(html)
+    }
 
-    return this.markdownVideo ? this.markdownService.processVideoTimestamps(html) : html
+    return html
   }
 }
-- 
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