eventing, renaming, subselecting

packages/bookshop/app/_i18n/i18n.properties

@@ -11,11 +11,11 @@ Authors = Authors
 Order = Order
 Orders = Orders
 Price = Price
-ShippingAddress = Shipping Address
+shippingAddress = Shipping Address
-CityName = City Name
+cityName = City Name
-HouseNumber = House Number
+houseNumber = House Number
-StreetName = Street Name
+streetName = Street Name
-PostalCode = Postal Code
+postalCode = Postal Code
-Country = Country
+country = Country
-AddressID = Address ID
+addressID = Address ID
-BusinessPartner = Business Partner
+businessPartner = Business Partner

packages/bookshop/app/common.cds

@@ -74,11 +74,11 @@ annotate my.Authors with {
 }
 
 annotate my.ShippingAddresses with {
-	AddressID @title:'{i18n>AddressID}';
+	addressID @title:'{i18n>addressID}';
-	BusinessPartner @title:'{i18n>BusinessPartner}';
+	businessPartner @title:'{i18n>businessPartner}';
-	CityName @title:'{i18n>CityName}';
+	cityName @title:'{i18n>cityName}';
-	StreetName @title:'{i18n>StreetName}';
+	streetName @title:'{i18n>streetName}';
-	PostalCode @title:'{i18n>PostalCode}';
+	postalCode @title:'{i18n>postalCode}';
-	Country @title:'{i18n>Country}';
+	country @title:'{i18n>country}';
-	HouseNumber @title:'{i18n>HouseNumber}';
+	houseNumber @title:'{i18n>houseNumber}';
 }

packages/bookshop/app/orders/fiori-service.cds

@@ -29,23 +29,24 @@ annotate AdminService.Orders with {
 				Label: 'Addresses',
 				SearchSupported: 'true',
 				Parameters: [
-					{ $Type: 'Common.ValueListParameterOut', LocalDataProperty: 'shippingAddress_AddressID', ValueListProperty: 'AddressID'},
+					{ $Type: 'Common.ValueListParameterOut', LocalDataProperty: 'shippingAddress_addressID', ValueListProperty: 'addressID'},
-					{ $Type: 'Common.ValueListParameterOut', LocalDataProperty: 'shippingAddress_BusinessPartner', ValueListProperty: 'BusinessPartner'},
+					{ $Type: 'Common.ValueListParameterOut', LocalDataProperty: 'shippingAddress_businessPartner', ValueListProperty: 'businessPartner'},
-					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'PostalCode'},
+					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'postalCode'},
-					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'CityName'},
+					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'cityName'},
-					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'StreetName'},
+					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'country'},
-					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'HouseNumber'},
+					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'streetName'},
+					{ $Type: 'Common.ValueListParameterDisplayOnly', ValueListProperty: 'houseNumber'},
 				]
 			},
 			SideEffects : {
     		EffectTypes      : #ValueChange,
-    		SourceProperties : [shippingAddress_AddressID],
+    		SourceProperties : [shippingAddress_addressID],
     		TargetProperties : [
-				shippingAddress.Country,
+				shippingAddress.country,
-				shippingAddress.HouseNumber,
+				shippingAddress.houseNumber,
-				shippingAddress.StreetName,
+				shippingAddress.streetName,
-				shippingAddress.CityName,
+				shippingAddress.cityName,
-				shippingAddress.PostalCode
+				shippingAddress.postalCode
     		]
   		}
 		}
@@ -114,11 +115,11 @@ annotate AdminService.Orders with @(
 		},
 		FieldGroup#ShippingAddress: {
 			Data: [
-				{Value: shippingAddress_AddressID, Label:'{i18n>ShippingAddress}'},
+				{Value: shippingAddress_addressID, Label:'{i18n>shippingAddress}'},
-				{Value: shippingAddress.HouseNumber, Label:'{i18n>HouseNumber}'},
+				{Value: shippingAddress.houseNumber, Label:'{i18n>houseNumber}'},
-				{Value: shippingAddress.StreetName, Label:'{i18n>StreetName}'},
+				{Value: shippingAddress.streetName, Label:'{i18n>streetName}'},
-				{Value: shippingAddress.CityName, Label:'{i18n>CityName}'},
+				{Value: shippingAddress.cityName, Label:'{i18n>cityName}'},
-				{Value: shippingAddress.PostalCode, Label:'{i18n>PostalCode}'},
+				{Value: shippingAddress.postalCode, Label:'{i18n>postalCode}'},
 			]
 		},
 	},

packages/bookshop/db/schema.cds

@@ -37,29 +37,23 @@ entity OrderItems : cuid {
 }
 
 // TODO: Use external information
-// @cds.persistence.skip: false
+@cds.persistence.skip: false
-// @cds.persistence.table
+@cds.persistence.table
-// entity ShippingAddresses as projection on extAddresses  {
+entity ShippingAddresses as projection on extAddresses  {
-//   key AddressID,
+  key AddressID as addressID,
-//   key BusinessPartner,
+  key BusinessPartner as businessPartner,
-//   Country,
+  Country as country,
-//   CityName,
+  CityName as cityName,
-//   PostalCode,
+  PostalCode as postalCode,
-//   StreetName,
+  StreetName as streetName,
-//   HouseNumber
+  HouseNumber as houseNumber
-//   // key AddressID: String;
-//   // Country: String @readonly;
-//   // CityName: String @readonly;
-//   // PostalCode: String @readonly;
-//   // StreetName: String @readonly;
-//   // HouseNumber: String @readonly;
-// }
-entity ShippingAddresses {
-  key AddressID: String;
-  key BusinessPartner: String;
-  Country: String @readonly;
-  CityName: String @readonly;
-  PostalCode: String @readonly;
-  StreetName: String @readonly;
-  HouseNumber: String @readonly;
 }
+// entity ShippingAddresses {
+//   key AddressID: String;
+//   key BusinessPartner: String;
+//   Country: String @readonly;
+//   CityName: String @readonly;
+//   PostalCode: String @readonly;
+//   StreetName: String @readonly;
+//   HouseNumber: String @readonly;
+// }

packages/bookshop/package.json

@@ -17,17 +17,28 @@
     "requires": {
       "API_BUSINESS_PARTNER": {
         "kind": "odata",
-        "model": "srv/external/API_BUSINESS_PARTNER"
+        "model": "srv/external/API_BUSINESS_PARTNER",
+        "--credentials": {
+          "url": "http://www.google.com"
+        }
       },
       "messaging": {
-        "kind": "enterprise-messaging"
+        "kind": "file-based-messaging"
       }
     },
     "auth": {
       "passport": {
         "strategy": "mock",
-        "users": { "alice": { "roles": [ "admin" ], "password": "secret", "ID": "ALICE" } }
+        "users": {
+          "alice": {
+            "roles": [
+              "admin"
+            ],
+            "password": "secret",
+            "ID": "ALICE"
+          }
+        }
       }
     }
   }
-}
+}

packages/bookshop/req.http

@@ -1,5 +1,6 @@
-PATCH  http://localhost:4004/api-business-partner/A_BusinessPartnerAddress(BusinessPartner='ANONYMOUS',AddressID='62640')
+PATCH  http://localhost:4004/api-business-partner/A_BusinessPartnerAddress(BusinessPartner='ALICE',AddressID='62640')
 Content-Type: application/json
+Authorization: Basic QUxJQ0Utc2VjcmV0
 
 {
     "PostalCode": "123456"

packages/bookshop/srv/admin-service.js

@@ -1,133 +1,135 @@
 const cds = require('@sap/cds')
-const { Books, ShippingAddresses, Orders } = cds.entities
+const { Books, ShippingAddresses } = cds.entities
-const RELEVANT_ADDRESS_COLUMNS = [
-  'AddressID',
-  'BusinessPartner',
-  'CityName',
-  'StreetName',
-  'PostalCode',
-  'Country',
-  'HouseNumber'
-]
 
 const bupaSrv = cds.connect.to('API_BUSINESS_PARTNER')
-const messagingSrv = cds.connect.to('messaging')
 
-messagingSrv.on('sap/messaging/ccf/BO/BusinessPartner/Changed', async msg => {
+const _diff = (obj1, obj2) =>
+  Object.keys(obj1).reduce(
+    (res, curr) =>
+      obj1[curr] === obj2[curr] ? res : (res[curr] = obj2[curr]) && res,
+    {}
+  )
+
+const _qlsToUpdateDifferences = (ownAddresses, remoteAddresses) =>
+  ownAddresses
+    .map(ownAddress => {
+      const remoteAddress = remoteAddresses.find(
+        address =>
+          address.businessPartner === ownAddress.businessPartner &&
+          address.addressID === ownAddress.addressID
+      )
+      if (remoteAddress) {
+        const diff = _diff(ownAddress, remoteAddress)
+        console.log('changing', diff)
+        return (
+          Object.keys(diff).length &&
+          UPDATE(ShippingAddresses)
+            .set(diff)
+            .where({
+              businessPartner: ownAddress.businessPartner,
+              addressID: ownAddress.addressID
+            })
+        )
+      }
+      return DELETE(ShippingAddresses).where({
+        businessPartner: ownAddress.businessPartner,
+        addressID: ownAddress.addressID
+      })
+    })
+    .filter(el => el)
+
+bupaSrv.on('sap/messaging/ccf/BO/BusinessPartner/Changed', async msg => {
   console.log('>> Message:', msg.data)
-  const BusinessPartner = msg.data.KEY[0].BUSINESSPARTNER
+  const businessPartner = msg.data.KEY[0].BUSINESSPARTNER
-  // TODO: Remove toLower hack.
+  const tx = cds.transaction()
-  // Every BusinessPartner from S/4HANA is UPPERCASE.
+  const selectQl = SELECT.from(ShippingAddresses).where({ businessPartner })
-  const ownOrders = await cds.run(SELECT.from(Orders).where('createdBy like', BusinessPartner))
+  const selectQlToBeDeleted = SELECT.from(ShippingAddresses).where({
-  console.log(ownOrders)
+    businessPartner
-  // const ownAddresses = await cds.run(
+  })
-  //   SELECT(['AddressID'])
+
-  //     .from(ShippingAddresses)
+  const ownAddresses = await tx.run(selectQl)
-  //     .where({ BusinessPartner: businessPartner })
+  await tx.commit()
-  // )
+  console.log('own:', ownAddresses)
-  // if (ownAddresses && ownAddresses.length > 0) {
+  if (ownAddresses && ownAddresses.length > 0) {
-  //   console.log('found business partner', businessPartner)
+    console.log('found')
-  // }
+    const txExt = bupaSrv.transaction()
-  // const tx = bupaSrv.transaction()
+    const remoteAddresses = await txExt.run(selectQlToBeDeleted)
-  // const remoteAddresses = await Promise.all(
+
-  //   ownAddresses.map(addressResult => {
+    await _qlsToUpdateDifferences(ownAddresses, remoteAddresses).map(ql =>
-  //     return tx.run(
+      tx.run(ql)
-  //       SELECT.one.from('API_BUSINESS_PARTNER.A_BusinessPartnerAddress')
+    )
-  //         .columns(RELEVANT_ADDRESS_COLUMNS)
+    await tx.commit()
-  //         .where({
+  }
-  //           AddressID: addressResult.AddressID,
-  //           BusinessPartner: businessPartner
-  //         })
-  //     )
-  //   })
-  // )
-  // console.log('addresses found:', remoteAddresses)
-  // await Promise.all(remoteAddresses.map(address => {
-  //   console.log('updating', address)
-  //   if (address) {
-  //     return cds.run(UPDATE(ShippingAddresses).set(address))
-  //   }
-  // }))
 })
 
-/** Service implementation for CatalogService */
 module.exports = cds.service.impl(function () {
+  async function _readAddresses (req) {
+    console.log('Addresses', ShippingAddresses)
+    const businessPartner = req.user.id
+    const tx = bupaSrv.transaction(req)
+    const ql = SELECT.from(ShippingAddresses).where({
+      businessPartner
+    })
+    if (req.query && req.query.SELECT && req.query.SELECT.columns) {
+      ql.columns(req.query.SELECT.columns)
+    }
+    if (req.query && req.query.SELECT && req.query.SELECT.where) {
+      ql.where(req.query.SELECT.where)
+    }
+
+    const result = await tx.run(ql)
+    delete result.businessPartner
+    return result
+  }
+
+  async function _fillAddress (req) {
+    if (req.data.shippingAddress_addressID) {
+      const businessPartner = req.user.id
+      const tx = bupaSrv.transaction(req)
+      const response = await tx.run(
+        SELECT.from(ShippingAddresses).where({
+          addressID: req.data.shippingAddress_addressID,
+          businessPartner
+        })
+      )
+      if (response && response.length > 0) {
+        const tx2 = cds.transaction(req)
+        try {
+          const qlStatement = INSERT.into(ShippingAddresses).entries(response)
+          await tx2.run(qlStatement)
+        } catch (e) {
+          // already in there
+        }
+      } else {
+        req.error('Shipping address not found.')
+      }
+    }
+  }
+
+  async function _reduceStock (req) {
+    const { Items: OrderItems } = req.data
+    if (OrderItems && OrderItems.length > 0) {
+      const all = await cds.transaction(req).run(() =>
+        OrderItems.map(order =>
+          UPDATE(Books)
+            .set('stock -=', order.amount)
+            .where('ID =', order.book_ID)
+            .and('stock >=', order.amount)
+        )
+      )
+      all.forEach((affectedRows, i) => {
+        if (affectedRows === 0)
+          req.error(
+            409,
+            `${OrderItems[i].amount} exceeds stock for book #${
+              OrderItems[i].book_ID
+            }`
+          )
+      })
+    }
+  }
+
   this.before('CREATE', 'Orders', _reduceStock)
   this.before('PATCH', 'Orders', _fillAddress)
   this.on('READ', 'Addresses', _readAddresses)
 })
-
-async function _readAddresses (req) {
-  const businessPartner = req.user.id
-  if (!businessPartner) {
-    return req.reject('You need to be authorized.')
-  }
-  const tx = bupaSrv.transaction(req)
-  const ql = SELECT.from('API_BUSINESS_PARTNER.A_BusinessPartnerAddress').where(
-    { BusinessPartner: businessPartner }
-  )
-  if (req.query && req.query.SELECT && req.query.SELECT.columns) {
-    ql.columns(req.query.SELECT.columns)
-  } else {
-    ql.columns(RELEVANT_ADDRESS_COLUMNS)
-  }
-  if (req.query && req.query.SELECT && req.query.SELECT.where) {
-    ql.where(req.query.SELECT.where)
-  }
-  const result = await tx.run(ql)
-  delete result.BusinessPartner
-  return result
-}
-
-/** Fill Address data from external service */
-async function _fillAddress (req) {
-  if (req.data.shippingAddress_AddressID) {
-    const businessPartner = req.user.id
-    if (!businessPartner) {
-      return req.reject('You need to be authorized.')
-    }
-    const tx = bupaSrv.transaction(req)
-    const response = await tx.run(
-      SELECT.from('API_BUSINESS_PARTNER.A_BusinessPartnerAddress')
-        .columns(RELEVANT_ADDRESS_COLUMNS)
-        .where({
-          AddressID: req.data.shippingAddress_AddressID,
-          BusinessPartner: businessPartner
-        })
-    )
-    if (response && response.length > 0) {
-      const tx2 = cds.transaction(req)
-      try {
-        await tx2.run(INSERT.into(ShippingAddresses).entries(response))
-      } catch (e) {
-        // already in there
-      }
-    } else {
-      req.error('Shipping address not found.')
-    }
-  }
-}
-
-/** Reduce stock of ordered books if available stock suffices */
-async function _reduceStock (req) {
-  const { Items: OrderItems } = req.data
-  if (OrderItems && OrderItems.length > 0) {
-    const all = await cds.transaction(req).run(() =>
-      OrderItems.map(order =>
-        UPDATE(Books)
-          .set('stock -=', order.amount)
-          .where('ID =', order.book_ID)
-          .and('stock >=', order.amount)
-      )
-    )
-    all.forEach((affectedRows, i) => {
-      if (affectedRows === 0)
-        req.error(
-          409,
-          `${OrderItems[i].amount} exceeds stock for book #${
-            OrderItems[i].book_ID
-          }`
-        )
-    })
-  }
-}

packages/bookshop/srv/external/API_BUSINESS_PARTNER.js

@@ -3,7 +3,7 @@ module.exports = srv => {
     srv.on('UPDATE', req => {
 
         const payload = {
-            KEY: [{ BUSINESSPARTNER: req.user.id }]
+            KEY: [{ BUSINESSPARTNER: req.data.BusinessPartner }]
         }
         console.log('<< Message:', payload)
         srv.emit('sap/messaging/ccf/BO/BusinessPartner/Changed', payload)