Spring cleaning, part 2 (#813)

* Remove OData v2 show case: Genres TreeView
* Refactored bookstore and fiori services: consolidate routing and remove deprecated files
* Add Jest configuration file with silent mode enabled
* Refactor test files: streamline imports and remove redundant code
* Change price field type to Price for better clarity and precision
* Example for separation of concerns: access-control.cds

bookstore/srv/server.js

@@ -0,0 +1,59 @@
+const cds = require ('@sap/cds')
+
+// Add routes to UIs from imported packages
+cds.once ('bootstrap', require('../app/routes'))
+
+// Mashing up bookshop services with required services...
+cds.once ('served', async ()=>{ // called by server.js
+
+  const CatalogService = await cds.connect.to ('CatalogService')
+  const ReviewsService = await cds.connect.to ('ReviewsService')
+  const OrdersService = await cds.connect.to ('OrdersService')
+  const db = await cds.connect.to ('db')
+
+  // reflect entity definitions used below...
+  const { Books } = db.entities ('sap.capire.bookshop')
+
+  //
+  // Delegate requests to read reviews to the ReviewsService
+  // Note: prepend is neccessary to intercept generic default handler
+  //
+  CatalogService.prepend (srv => srv.on ('READ', 'Books/reviews', (req) => {
+    console.debug ('> delegating request to ReviewsService') // eslint-disable-line no-console
+    const [id] = req.params, { columns, limit } = req.query.SELECT
+    return ReviewsService.read ('Reviews',columns).limit(limit).where({subject:String(id)})
+  }))
+
+  //
+  // Create an order with the OrdersService when CatalogService signals a new order
+  //
+  CatalogService.on ('OrderedBook', async (msg) => {
+    const { book, quantity, buyer } = msg.data
+    const { title, price } = await db.read (Books, book, b => { b.title, b.price })
+    return OrdersService.create ('OrdersNoDraft').entries({
+      OrderNo: 'Order at '+ (new Date).toLocaleString(),
+      Items: [{ product:{ID:`${book}`}, title, price, quantity }],
+      buyer, createdBy: buyer
+    })
+  })
+
+  //
+  // Update Books' average ratings when ReviewsService signals updated reviews
+  //
+  ReviewsService.on ('reviewed', (msg) => {
+    console.debug ('> received:', msg.event, msg.data) // eslint-disable-line no-console
+    const { subject, count, rating } = msg.data
+    return UPDATE(Books,subject).with({ numberOfReviews:count, rating })
+  })
+
+  //
+  // Reduce stock of ordered books for orders are created from Orders admin UI
+  //
+  OrdersService.on ('OrderChanged', (msg) => {
+    console.debug ('> received:', msg.event, msg.data) // eslint-disable-line no-console
+    const { product, deltaQuantity } = msg.data
+    return UPDATE (Books) .where ('ID =', product)
+    .and ('stock >=', deltaQuantity)
+    .set ('stock -=', deltaQuantity)
+  })
+})