Dashboard completed. Demo files added

src/layout/service/CountryService.js

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+export default class CountryService {
+
+    getCountries() {
+        return fetch('data/countries.json').then(res => res.json()).then(d => d.data);
+    }
+}

src/layout/service/CustomerService.js

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+export default class CustomerService {
+
+    getCustomersSmall() {
+        return fetch('data/customers-small.json').then(res => res.json()).then(d => d.data);
+    }
+  
+    getCustomersMedium() {
+        return fetch('data/customers-medium.json').then(res => res.json()).then(d => d.data);
+    }
+  
+    getCustomersLarge() {
+        return fetch('data/customers-large.json').then(res => res.json()).then(d => d.data);
+    }
+  
+    getCustomersXLarge() {
+        return fetch('data/customers-xlarge.json').then(res => res.json()).then(d => d.data);
+    }
+  
+    getCustomers(params) {
+        const queryParams = Object.keys(params).map(k => encodeURIComponent(k) + '=' + encodeURIComponent(params[k])).join('&');
+        return fetch('https://www.primefaces.org/data/customers?' + queryParams).then(res => res.json())
+    }
+    
+}
+  

src/layout/service/NodeService.js

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+export default class NodeService {
+
+    getTreeTableNodes() {
+        return fetch('data/treetablenodes.json').then(res => res.json()).then(d => d.root);
+    }
+
+    getTreeNodes() {
+        return fetch('data/treenodes.json').then(res => res.json()).then(d => d.root);
+    }
+    
+}

src/layout/service/PhotoService.js

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+export default class PhotoService {
+
+    getImages() {
+        return fetch('data/photos.json').then(res => res.json())
+                .then(d => d.data);
+    }
+}

src/layout/service/ProductService.js

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+export default class ProductService {
+
+    getProductsSmall() {
+		return fetch('data/products-small.json').then(res => res.json()).then(d => d.data);
+	}
+
+	getProducts() {
+		return fetch('data/products.json').then(res => res.json()).then(d => d.data);
+    }
+
+    getProductsWithOrdersSmall() {
+		return fetch('data/products-orders-small.json').then(res => res.json()).then(d => d.data);
+	}
+	
+}