2026-03-09 09:58:45 +01:00
3 changed files with 286 additions and 0 deletions
--- a/frontend/public/robots.txt
+++ b/frontend/public/robots.txt
@@ -0,0 +1,21 @@
+User-agent: *
+Allow: /
+
+Disallow: /admin
+Disallow: /admin/
+Disallow: /*/admin
+Disallow: /*/admin/
+Disallow: /order/
+Disallow: /*/order/
+Disallow: /co/
+Disallow: /*/co/
+Disallow: /checkout
+Disallow: /checkout/
+Disallow: /*/checkout
+Disallow: /*/checkout/
+Disallow: /shop
+Disallow: /shop/
+Disallow: /*/shop
+Disallow: /*/shop/
+
+Sitemap: https://3d-fab.ch/sitemap.xml
--- a/frontend/public/sitemap.xml
+++ b/frontend/public/sitemap.xml
@@ -0,0 +1,144 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset
+  xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
+  xmlns:xhtml="http://www.w3.org/1999/xhtml"
+>
+  <url>
+    <loc>https://3d-fab.ch/it</loc>
+    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it" />
+    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en" />
+    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de" />
+    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr" />
+    <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it" />
+    <changefreq>weekly</changefreq>
+    <priority>1.0</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/calculator/basic</loc>
+    <xhtml:link
+      rel="alternate"
+      hreflang="it"
+      href="https://3d-fab.ch/it/calculator/basic"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="en"
+      href="https://3d-fab.ch/en/calculator/basic"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="de"
+      href="https://3d-fab.ch/de/calculator/basic"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="fr"
+      href="https://3d-fab.ch/fr/calculator/basic"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="x-default"
+      href="https://3d-fab.ch/it/calculator/basic"
+    />
+    <changefreq>weekly</changefreq>
+    <priority>0.9</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/calculator/advanced</loc>
+    <xhtml:link
+      rel="alternate"
+      hreflang="it"
+      href="https://3d-fab.ch/it/calculator/advanced"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="en"
+      href="https://3d-fab.ch/en/calculator/advanced"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="de"
+      href="https://3d-fab.ch/de/calculator/advanced"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="fr"
+      href="https://3d-fab.ch/fr/calculator/advanced"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="x-default"
+      href="https://3d-fab.ch/it/calculator/advanced"
+    />
+    <changefreq>weekly</changefreq>
+    <priority>0.8</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/about</loc>
+    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/about" />
+    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/about" />
+    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/about" />
+    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/about" />
+    <xhtml:link
+      rel="alternate"
+      hreflang="x-default"
+      href="https://3d-fab.ch/it/about"
+    />
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/contact</loc>
+    <xhtml:link
+      rel="alternate"
+      hreflang="it"
+      href="https://3d-fab.ch/it/contact"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="en"
+      href="https://3d-fab.ch/en/contact"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="de"
+      href="https://3d-fab.ch/de/contact"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="fr"
+      href="https://3d-fab.ch/fr/contact"
+    />
+    <xhtml:link
+      rel="alternate"
+      hreflang="x-default"
+      href="https://3d-fab.ch/it/contact"
+    />
+    <changefreq>monthly</changefreq>
+    <priority>0.7</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/privacy</loc>
+    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/privacy" />
+    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/privacy" />
+    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/privacy" />
+    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/privacy" />
+    <xhtml:link
+      rel="alternate"
+      hreflang="x-default"
+      href="https://3d-fab.ch/it/privacy"
+    />
+    <changefreq>yearly</changefreq>
+    <priority>0.4</priority>
+  </url>
+  <url>
+    <loc>https://3d-fab.ch/it/terms</loc>
+    <xhtml:link rel="alternate" hreflang="it" href="https://3d-fab.ch/it/terms" />
+    <xhtml:link rel="alternate" hreflang="en" href="https://3d-fab.ch/en/terms" />
+    <xhtml:link rel="alternate" hreflang="de" href="https://3d-fab.ch/de/terms" />
+    <xhtml:link rel="alternate" hreflang="fr" href="https://3d-fab.ch/fr/terms" />
+    <xhtml:link rel="alternate" hreflang="x-default" href="https://3d-fab.ch/it/terms" />
+    <changefreq>yearly</changefreq>
+    <priority>0.4</priority>
+  </url>
+</urlset>
--- a/frontend/src/app/core/services/seo.service.ts
+++ b/frontend/src/app/core/services/seo.service.ts
@@ -0,0 +1,121 @@
+import { DOCUMENT } from '@angular/common';
+import { Inject, Injectable } from '@angular/core';
+import { Title, Meta } from '@angular/platform-browser';
+import {
+  ActivatedRouteSnapshot,
+  NavigationEnd,
+  Router,
+} from '@angular/router';
+import { filter } from 'rxjs/operators';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class SeoService {
+  private readonly defaultTitle = '3D fab | Stampa 3D su misura';
+  private readonly defaultDescription =
+    'Stampa 3D su misura con preventivo online immediato. Carica il file, scegli materiale e qualità, ricevi prezzo e tempi in pochi secondi.';
+  private readonly supportedLangs = new Set(['it', 'en', 'de', 'fr']);
+
+  constructor(
+    private router: Router,
+    private titleService: Title,
+    private metaService: Meta,
+    @Inject(DOCUMENT) private document: Document,
+  ) {
+    this.applyRouteSeo(this.router.routerState.snapshot.root);
+    this.router.events
+      .pipe(filter((event): event is NavigationEnd => event instanceof NavigationEnd))
+      .subscribe(() => {
+        this.applyRouteSeo(this.router.routerState.snapshot.root);
+      });
+  }
+
+  private applyRouteSeo(rootSnapshot: ActivatedRouteSnapshot): void {
+    const mergedData = this.getMergedRouteData(rootSnapshot);
+    const title = this.asString(mergedData['seoTitle']) ?? this.defaultTitle;
+    const description =
+      this.asString(mergedData['seoDescription']) ?? this.defaultDescription;
+    const robots = this.asString(mergedData['seoRobots']) ?? 'index, follow';
+
+    this.titleService.setTitle(title);
+    this.metaService.updateTag({ name: 'description', content: description });
+    this.metaService.updateTag({ name: 'robots', content: robots });
+    this.metaService.updateTag({ property: 'og:title', content: title });
+    this.metaService.updateTag({
+      property: 'og:description',
+      content: description,
+    });
+    this.metaService.updateTag({ property: 'og:type', content: 'website' });
+    this.metaService.updateTag({ name: 'twitter:card', content: 'summary' });
+
+    const cleanPath = this.getCleanPath(this.router.url);
+    const canonical = `${this.document.location.origin}${cleanPath}`;
+    this.metaService.updateTag({ property: 'og:url', content: canonical });
+    this.updateCanonicalTag(canonical);
+    this.updateLangAndAlternates(cleanPath);
+  }
+
+  private getMergedRouteData(snapshot: ActivatedRouteSnapshot): Record<string, unknown> {
+    const merged: Record<string, unknown> = {};
+    let cursor: ActivatedRouteSnapshot | null = snapshot;
+    while (cursor) {
+      Object.assign(merged, cursor.data ?? {});
+      cursor = cursor.firstChild;
+    }
+    return merged;
+  }
+
+  private asString(value: unknown): string | undefined {
+    return typeof value === 'string' ? value : undefined;
+  }
+
+  private getCleanPath(url: string): string {
+    const path = (url || '/').split('?')[0].split('#')[0];
+    return path || '/';
+  }
+
+  private updateCanonicalTag(url: string): void {
+    let link = this.document.head.querySelector(
+      'link[rel="canonical"]',
+    ) as HTMLLinkElement | null;
+    if (!link) {
+      link = this.document.createElement('link');
+      link.setAttribute('rel', 'canonical');
+      this.document.head.appendChild(link);
+    }
+    link.setAttribute('href', url);
+  }
+
+  private updateLangAndAlternates(path: string): void {
+    const segments = path.split('/').filter(Boolean);
+    const firstSegment = segments[0]?.toLowerCase();
+    const hasLang = Boolean(firstSegment && this.supportedLangs.has(firstSegment));
+    const lang = hasLang ? firstSegment : 'it';
+    const suffixSegments = hasLang ? segments.slice(1) : segments;
+    const suffix = suffixSegments.length > 0 ? `/${suffixSegments.join('/')}` : '';
+
+    this.document.documentElement.lang = lang;
+
+    this.document.head
+      .querySelectorAll('link[rel="alternate"][data-seo-managed="true"]')
+      .forEach((node) => node.remove());
+
+    for (const alt of ['it', 'en', 'de', 'fr']) {
+      this.appendAlternateLink(alt, `${this.document.location.origin}/${alt}${suffix}`);
+    }
+    this.appendAlternateLink(
+      'x-default',
+      `${this.document.location.origin}/it${suffix}`,
+    );
+  }
+
+  private appendAlternateLink(hreflang: string, href: string): void {
+    const link = this.document.createElement('link');
+    link.setAttribute('rel', 'alternate');
+    link.setAttribute('hreflang', hreflang);
+    link.setAttribute('href', href);
+    link.setAttribute('data-seo-managed', 'true');
+    this.document.head.appendChild(link);
+  }
+}