SEO/AEO, Farb schema, breadcrumbs

bizmatch/src/app/services/sitemap.service.ts

@@ -0,0 +1,135 @@
+import { Injectable } from '@angular/core';
+
+export interface SitemapUrl {
+  loc: string;
+  lastmod?: string;
+  changefreq?: 'always' | 'hourly' | 'daily' | 'weekly' | 'monthly' | 'yearly' | 'never';
+  priority?: number;
+}
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SitemapService {
+  private readonly baseUrl = 'https://biz-match.com';
+
+  /**
+   * Generate XML sitemap content
+   */
+  generateSitemap(urls: SitemapUrl[]): string {
+    const urlElements = urls.map(url => this.generateUrlElement(url)).join('\n  ');
+
+    return `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+  ${urlElements}
+</urlset>`;
+  }
+
+  /**
+   * Generate a single URL element for the sitemap
+   */
+  private generateUrlElement(url: SitemapUrl): string {
+    let element = `<url>\n    <loc>${url.loc}</loc>`;
+
+    if (url.lastmod) {
+      element += `\n    <lastmod>${url.lastmod}</lastmod>`;
+    }
+
+    if (url.changefreq) {
+      element += `\n    <changefreq>${url.changefreq}</changefreq>`;
+    }
+
+    if (url.priority !== undefined) {
+      element += `\n    <priority>${url.priority.toFixed(1)}</priority>`;
+    }
+
+    element += '\n  </url>';
+    return element;
+  }
+
+  /**
+   * Generate sitemap URLs for static pages
+   */
+  getStaticPageUrls(): SitemapUrl[] {
+    return [
+      {
+        loc: `${this.baseUrl}/`,
+        changefreq: 'daily',
+        priority: 1.0
+      },
+      {
+        loc: `${this.baseUrl}/home`,
+        changefreq: 'daily',
+        priority: 1.0
+      },
+      {
+        loc: `${this.baseUrl}/listings`,
+        changefreq: 'daily',
+        priority: 0.9
+      },
+      {
+        loc: `${this.baseUrl}/listings-2`,
+        changefreq: 'daily',
+        priority: 0.8
+      },
+      {
+        loc: `${this.baseUrl}/listings-3`,
+        changefreq: 'daily',
+        priority: 0.8
+      },
+      {
+        loc: `${this.baseUrl}/listings-4`,
+        changefreq: 'daily',
+        priority: 0.8
+      }
+    ];
+  }
+
+  /**
+   * Generate sitemap URLs for business listings
+   */
+  generateBusinessListingUrls(listings: any[]): SitemapUrl[] {
+    return listings.map(listing => ({
+      loc: `${this.baseUrl}/details-business-listing/${listing.id}`,
+      lastmod: this.formatDate(listing.updated || listing.created),
+      changefreq: 'weekly' as const,
+      priority: 0.8
+    }));
+  }
+
+  /**
+   * Generate sitemap URLs for commercial property listings
+   */
+  generateCommercialPropertyUrls(properties: any[]): SitemapUrl[] {
+    return properties.map(property => ({
+      loc: `${this.baseUrl}/details-commercial-property/${property.id}`,
+      lastmod: this.formatDate(property.updated || property.created),
+      changefreq: 'weekly' as const,
+      priority: 0.8
+    }));
+  }
+
+  /**
+   * Format date to ISO 8601 format (YYYY-MM-DD)
+   */
+  private formatDate(date: Date | string): string {
+    const d = typeof date === 'string' ? new Date(date) : date;
+    return d.toISOString().split('T')[0];
+  }
+
+  /**
+   * Generate complete sitemap with all URLs
+   */
+  async generateCompleteSitemap(
+    businessListings: any[],
+    commercialProperties: any[]
+  ): Promise<string> {
+    const allUrls = [
+      ...this.getStaticPageUrls(),
+      ...this.generateBusinessListingUrls(businessListings),
+      ...this.generateCommercialPropertyUrls(commercialProperties)
+    ];
+
+    return this.generateSitemap(allUrls);
+  }
+}