From b70bcfbe12cc4e6d59d391b3526c312a13df0cef Mon Sep 17 00:00:00 2001
From: Mathieu Sanchez <mathieu.sanchez@outlook.fr>
Date: Tue, 21 May 2019 13:00:29 +0900
Subject: [PATCH] Add SEO Services

---
 src/app/app.component.ts                      | 14 +++-
 src/app/core/services/index.ts                |  2 +
 src/app/core/services/seo/seo.service.spec.ts | 12 +++
 src/app/core/services/seo/seo.service.ts      | 77 +++++++++++++++++++
 4 files changed, 103 insertions(+), 2 deletions(-)
 create mode 100644 src/app/core/services/seo/seo.service.spec.ts
 create mode 100644 src/app/core/services/seo/seo.service.ts

diff --git a/src/app/app.component.ts b/src/app/app.component.ts
index 53d3f76..47816ce 100644
--- a/src/app/app.component.ts
+++ b/src/app/app.component.ts
@@ -1,10 +1,20 @@
-import { Component } from '@angular/core';
+import { Component, OnInit } from '@angular/core';
+import { SEOService } from '@app/core/services';
 
 @Component({
   selector: 'app-root',
   templateUrl: './app.component.html',
   styleUrls: ['./app.component.css']
 })
-export class AppComponent {
+export class AppComponent implements OnInit {
+
   title = 'DiscoTrip';
+
+  constructor( public seoService: SEOService ) {
+  }
+
+  ngOnInit() {
+    this.seoService.start();
+  }
+
 }
diff --git a/src/app/core/services/index.ts b/src/app/core/services/index.ts
index 98c29a9..a632bde 100644
--- a/src/app/core/services/index.ts
+++ b/src/app/core/services/index.ts
@@ -1,2 +1,4 @@
 export * from './auth/auth.service';
 export * from './log/log.service';
+export * from './seo/seo.service';
+export * from './storage/storage.service';
diff --git a/src/app/core/services/seo/seo.service.spec.ts b/src/app/core/services/seo/seo.service.spec.ts
new file mode 100644
index 0000000..e3050c5
--- /dev/null
+++ b/src/app/core/services/seo/seo.service.spec.ts
@@ -0,0 +1,12 @@
+import { TestBed } from '@angular/core/testing';
+
+import { SEOService } from './seo.service';
+
+describe( 'SEOService', () => {
+  beforeEach( () => TestBed.configureTestingModule( {} ) );
+
+  it( 'should be created', () => {
+    const service: SEOService = TestBed.get( SEOService );
+    expect( service ).toBeTruthy();
+  } );
+} );
diff --git a/src/app/core/services/seo/seo.service.ts b/src/app/core/services/seo/seo.service.ts
new file mode 100644
index 0000000..9bfd42f
--- /dev/null
+++ b/src/app/core/services/seo/seo.service.ts
@@ -0,0 +1,77 @@
+import { Injectable } from '@angular/core';
+import { Meta, Title } from '@angular/platform-browser';
+import { environment } from '@env/environment';
+import { ActivatedRoute, NavigationEnd, Router } from '@angular/router';
+import { filter, map, mergeMap } from 'rxjs/operators';
+
+@Injectable()
+export class SEOService {
+
+  private defaultTitle = 'Constat à l\'amiable automatique';
+  private defaultDescription = 'Notre projet consiste à aider les automobilistes en automatisant le remplissage du constat. C2A est intégré dans les' +
+    'véhicules et récupère lors d’un accident les données de celui-ci (chocs, vitesse, position) pour remplir le constat. L’automobiliste obtiendra' +
+    'son constat rempli sur son téléphone et après avoir apposé les signatures, le constat sera envoyé aux assureurs.';
+  private defaultNoIndex = false;
+  private defaultNoFollow = false;
+
+  constructor( private title: Title, private meta: Meta, private router: Router, private activatedRoute: ActivatedRoute ) {}
+
+  public start() {
+    this.meta.updateTag( { name: 'og:locale', contest: 'fr_FR' } );
+    this.meta.updateTag( { name: 'og:site_name', contest: environment.appName } );
+    this.meta.updateTag( { name: 'og:url', content: location.href } );
+    this.routerListener();
+  }
+
+  private updateTitle( title: string ) {
+    this.title.setTitle( title );
+    this.meta.updateTag( { name: 'og:title', content: title } );
+  }
+
+  private updateDescription( desc: string ) {
+    this.meta.updateTag( { name: 'description', content: desc } );
+    this.meta.updateTag( { name: 'og:description', content: desc } );
+  }
+
+  private updateIndexFollow( noindex: boolean, nofollow: boolean ) {
+    let content = '';
+
+    content += ( !noindex ? '' : 'noindex' );
+    content += ( content.length > 0 ? ', ' : '' );
+    content += ( !nofollow ? '' : 'nofollow' );
+
+    if ( content.length > 0 ) {
+      this.meta.updateTag( { name: 'robots', content } );
+      this.meta.updateTag( { name: 'googlebot', content } );
+    }
+  }
+
+  private setMetas( event: any ) {
+    event[ 'title' ] = ( !event[ 'title' ] ? this.defaultTitle : event[ 'title' ] );
+    event[ 'description' ] = ( !event[ 'description' ] ? this.defaultDescription : event[ 'description' ] );
+    event[ 'noindex' ] = ( !event[ 'noindex' ] ? this.defaultNoIndex : event[ 'noindex' ] );
+    event[ 'nofollow' ] = ( !event[ 'nofollow' ] ? this.defaultNoFollow : event[ 'nofollow' ] );
+    this.updateTitle( event[ 'title' ] + ' | C2A' );
+    this.updateDescription( event[ 'description' ] );
+    this.updateIndexFollow( event[ 'noindex' ], event[ 'nofollow' ] );
+  }
+
+  private routerListener() {
+    this.router.events
+      .pipe(
+        filter( ( event ) => event instanceof NavigationEnd ),
+        map( () => this.activatedRoute ),
+        map( ( route ) => {
+          while ( route.firstChild ) {
+            route = route.firstChild;
+          }
+          return route;
+        } ),
+        filter( ( route ) => route.outlet === 'primary' ),
+        mergeMap( ( route ) => route.data )
+      ).subscribe( ( event ) => {
+      this.setMetas( event );
+    } );
+  }
+
+}