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

6 files changed, 79 insertions, 0 deletions

diff --git a/client/src/app/+home/home-routing.module.ts b/client/src/app/+home/home-routing.module.ts
new file mode 100644
index 000000000..1eaee4449
--- /dev/null
+++ b/client/src/app/+home/home-routing.module.ts
@@ -0,0 +1,18 @@
+import { NgModule } from '@angular/core'
+import { RouterModule, Routes } from '@angular/router'
+import { MetaGuard } from '@ngx-meta/core'
+import { HomeComponent } from './home.component'
+
+const homeRoutes: Routes = [
+  {
+    path: '',
+    component: HomeComponent,
+    canActivateChild: [ MetaGuard ]
+  }
+]
+
+@NgModule({
+  imports: [ RouterModule.forChild(homeRoutes) ],
+  exports: [ RouterModule ]
+})
+export class HomeRoutingModule {}
diff --git a/client/src/app/+home/home.component.html b/client/src/app/+home/home.component.html
new file mode 100644
index 000000000..645b9dc69
--- /dev/null
+++ b/client/src/app/+home/home.component.html
@@ -0,0 +1,4 @@
+<div class="root margin-content">
+  <div #contentWrapper></div>
+</div>
+
diff --git a/client/src/app/+home/home.component.scss b/client/src/app/+home/home.component.scss
new file mode 100644
index 000000000..6c73e9248
--- /dev/null
+++ b/client/src/app/+home/home.component.scss
@@ -0,0 +1,3 @@
+.root {
+  padding-top: 20px;
+}
diff --git a/client/src/app/+home/home.component.ts b/client/src/app/+home/home.component.ts
new file mode 100644
index 000000000..16d3a6df7
--- /dev/null
+++ b/client/src/app/+home/home.component.ts
@@ -0,0 +1,26 @@
+
+import { Component, ElementRef, OnInit, ViewChild } from '@angular/core'
+import { CustomMarkupService } from '@app/shared/shared-custom-markup'
+import { CustomPageService } from '@app/shared/shared-main/custom-page'
+
+@Component({
+  templateUrl: './home.component.html',
+  styleUrls: [ './home.component.scss' ]
+})
+
+export class HomeComponent implements OnInit {
+  @ViewChild('contentWrapper') contentWrapper: ElementRef<HTMLInputElement>
+
+  constructor (
+    private customMarkupService: CustomMarkupService,
+    private customPageService: CustomPageService
+  ) { }
+
+  async ngOnInit () {
+    this.customPageService.getInstanceHomepage()
+      .subscribe(async ({ content }) => {
+        const element = await this.customMarkupService.buildElement(content)
+        this.contentWrapper.nativeElement.appendChild(element)
+      })
+  }
+}
diff --git a/client/src/app/+home/home.module.ts b/client/src/app/+home/home.module.ts
new file mode 100644
index 000000000..102cdc296
--- /dev/null
+++ b/client/src/app/+home/home.module.ts
@@ -0,0 +1,25 @@
+import { NgModule } from '@angular/core'
+import { SharedCustomMarkupModule } from '@app/shared/shared-custom-markup'
+import { SharedMainModule } from '@app/shared/shared-main'
+import { HomeRoutingModule } from './home-routing.module'
+import { HomeComponent } from './home.component'
+
+@NgModule({
+  imports: [
+    HomeRoutingModule,
+
+    SharedMainModule,
+    SharedCustomMarkupModule
+  ],
+
+  declarations: [
+    HomeComponent
+  ],
+
+  exports: [
+    HomeComponent
+  ],
+
+  providers: [ ]
+})
+export class HomeModule { }
diff --git a/client/src/app/+home/index.ts b/client/src/app/+home/index.ts
new file mode 100644
index 000000000..7c77cf9fd
--- /dev/null
+++ b/client/src/app/+home/index.ts
@@ -0,0 +1,3 @@
+export * from './home-routing.module'
+export * from './home.component'
+export * from './home.module'