Added more comments

.github/workflows/node.js.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [10.x, 12.x, 14.x]
 
     steps:
     - uses: actions/checkout@v2

.registry/.gitignore

@@ -1 +0,0 @@
-*.tgz

.registry/server.js

@@ -5,9 +5,9 @@ const app = express()
 
 const { PORT=4444 } = process.env
 const [,,port=PORT] = process.argv
-process.chdir(__dirname)
 
 app.use('/-/:tarball', (req,res,next) => {
+  const url = decodeURIComponent(req.url)
   console.debug ('GET', req.params)
   try {
     const { tarball } = req.params

.tours/samples.tour

@@ -1,136 +0,0 @@
-{
-  "$schema": "https://aka.ms/codetour-schema",
-  "title": "CAP Samples",
-  "steps": [
-    {
-      "title": "Welcome",
-      "file": "README.md",
-      "description": "### Welcome to CAP Samples!\n\nThis tour leads you through a collection of samples for the [SAP Cloud Application Programming Model](https://cap.cloud.sap)\nYou will learn which features of the programming models are demonstrated in which sample.\n\nLet's start!",
-      "line": 2,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 3,
-          "character": 108
-        }
-      }
-    },
-    {
-      "file": "hello/world.cds",
-      "description": "### Hello World!\n\nThis is a simplistic [Hello World](https://cap.cloud.sap/docs/get-started/hello-world) service using [CDS](https://cap.cloud.sap/docs/cds/) and [cds.services](https://cap.cloud.sap/docs/node.js/api#services-api).",
-      "line": 2,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 4,
-          "character": 1
-        }
-      },
-      "title": "Hello World!"
-    },
-    {
-      "file": "bookshop/db/schema.cds",
-      "description": "### A Bookshop!\n\nIntroduces:\n- [Project Setup](https://cap.cloud.sap/docs/get-started/) and [Layouts](https://cap.cloud.sap/docs/get-started/projects)\n- [Domain Modeling](https://cap.cloud.sap/docs/guides/domain-models)\n- [Defining Services](https://cap.cloud.sap/docs/guides/providing-services)\n- [Generic Providers](https://cap.cloud.sap/docs/guides/generic-providers)\n- [Adding Custom Logic](https://cap.cloud.sap/docs/guides/service-impl)\n- [Using Databases](https://cap.cloud.sap/docs/guides/databases)\n",
-      "line": 1,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 32,
-          "character": 1
-        }
-      },
-      "title": "Bookshop"
-    },
-    {
-      "file": "common/index.cds",
-      "description": "### Extend and Reuse\n\nShowcases how to extend [@sap/cds/common](https://cap.cloud.sap/docs/cds/common) thereby covering:\n- Building [extension packages](https://cap.cloud.sap/docs/guides/domain-models#aspects-extensibility)\n- Providing [reuse packages](https://cap.cloud.sap/docs/get-started/projects#sharing-and-reusing-content)\n- [Verticalization](https://cap.cloud.sap/docs/cds/common#adapting-to-your-needs)\n- Using [Aspects](https://cap.cloud.sap/docs/cds/cdl#aspects)\n- Used in the [fiori app sample](#fiori)\n",
-      "line": 1,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 46,
-          "character": 1
-        }
-      },
-      "title": "Common"
-    },
-    {
-      "file": "orders/db/schema.cds",
-      "description": "### Compositions and Serving Documents\n\nA standalone orders management service, demonstrating:\n- Using [Compositions](https://cap.cloud.sap/docs/cds/cdl#compositions) in [Domain Models](https://cap.cloud.sap/docs/guides/domain-models), along with\n- [Serving deeply nested documents](https://cap.cloud.sap/docs/guides/generic-providers#serving-structured-data)\n",
-      "line": 1,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 27,
-          "character": 1
-        }
-      },
-      "title": "Orders"
-    },
-    {
-      "file": "reviews/db/schema.cds",
-      "description": "### More Modularity\n\nShows how to implement a modular service to manage product reviews, including:\n- Consuming other services synchronously and asynchronously\n- Serving requests synchronously\n- Emitting events asynchronously\n- Grow as you go, with:\n- Mocking app services\n- Running service meshes\n- Late-cut Micro Services\n- As well as managed data, input validations, and authorization\n",
-      "line": 1,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 39,
-          "character": 1
-        }
-      },
-      "title": "Reviews"
-    },
-    {
-      "file": "fiori/app/index.cds",
-      "description": "### Annotations for SAP Fiori Elements\n\nA [composite app, reusing and combining](https://cap.cloud.sap/docs/guides/verticalize) these packages:\n  - [@capire/bookshop](bookshop)\n  - [@capire/reviews](reviews)\n  - [@capire/orders](orders)\n  - [@capire/common](common)\n\n[Adds a SAP Fiori elements application](https://cap.cloud.sap/docs/guides/fiori/) to bookshop, thereby introducing to:\n  - [OData Annotations](https://cap.cloud.sap/docs/guides/fiori#adding-odata-annotations) in `.cds` files\n  - Support for [Fiori Draft](https://cap.cloud.sap/docs/guides/fiori#draft)\n  - Support for [Value Helps](https://cap.cloud.sap/docs/guides/fiori#value-help)\n  - Serving SAP Fiori apps locally\n\n[The Vue.js app](bookshop/app/vue) imported from bookshop is served as well.\n",
-      "line": 1,
-      "selection": {
-        "start": {
-          "line": 1,
-          "character": 1
-        },
-        "end": {
-          "line": 13,
-          "character": 1
-        }
-      },
-      "title": "Fiori"
-    },
-    {
-      "file": "package.json",
-      "description": "### All-in-one Monorepo\n\nEach sample sub directory essentially is a standard npm package, some with standard npm dependencies to other samples. The root folder's [package.json](package.json) has local links to the sub folders, such that an `npm install` populates a local `node_modules` folder acts like a local npm registry to the individual sample packages.\n",
-      "line": 8,
-      "selection": {
-        "start": {
-          "line": 8,
-          "character": 1
-        },
-        "end": {
-          "line": 15,
-          "character": 1
-        }
-      },
-      "title": "Packages"
-    }
-  ],
-  "isPrimary": true,
-  "description": "Overview of CAP Samples for Node.js"
-}

.vscode/extensions.json

@@ -4,15 +4,14 @@
 
 	// List of extensions which should be recommended for users of this workspace.
 	"recommendations": [
-		"sapse.vscode-cds",
+		"SAPSE.vscode-cds",
 		"dbaeumer.vscode-eslint",
 		"esbenp.prettier-vscode",
 		"mechatroner.rainbow-csv",
 		"humao.rest-client",
 		"alexcvzz.vscode-sqlite",
 		"hbenl.vscode-mocha-test-adapter",
-		"sdras.night-owl",
+		"sdras.night-owl"
-		"vsls-contrib.codetour"
 	],
 	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
 	"unwantedRecommendations": [

README.md

@@ -3,7 +3,7 @@
 Find here a collection of samples for the [SAP Cloud Application Programming Model](https://cap.cloud.sap) organized in a simplistic [monorepo setup](samples.md#all-in-one-monorepo). → See [**Overview** of contained samples](samples.md)
 
 ![](https://github.com/SAP-samples/cloud-cap-samples/workflows/CI/badge.svg)
-<!--[![REUSE status](https://api.reuse.software/badge/github.com/SAP-samples/cloud-cap-samples)](https://api.reuse.software/info/github.com/SAP-samples/cloud-cap-samples)-->
+[![REUSE status](https://api.reuse.software/badge/github.com/SAP-samples/cloud-cap-samples)](https://api.reuse.software/info/github.com/SAP-samples/cloud-cap-samples)
 
 
 ### Preliminaries

bookshop/app/vue/index.html

@@ -36,7 +36,7 @@
             <td class="rating-stars">
                 {{ ('★'.repeat(Math.round(book.rating))+'☆☆☆☆☆').slice(0,5) }}
             </td>
-            <td>{{ book.currency && book.currency.symbol }} {{ book.price }}</td>
+            <td>{{ book.currency.symbol }} {{ book.price }}</td>
         </tr>
     </table>
 

common/package.json

@@ -3,6 +3,6 @@
   "description": "Provides a pre-built extension package for std @sap/cds/common",
   "version": "1.0.0",
   "dependencies": {
-    "@sap/cds": "*"
+    "@sap/cds": "latest"
   }
 }

fiori/app/bookshop.html

@@ -1,3 +1,3 @@
 <head>
-  <meta http-equiv="refresh" content="0;url=bookshop/index.html">
+  <meta http-equiv="refresh" content="0;url=vue/bookshop/index.html">
 </head>

fiori/app/reviews.html

@@ -1,3 +1,3 @@
 <head>
-  <meta http-equiv="refresh" content="0;url=reviews/index.html">
+  <meta http-equiv="refresh" content="0;url=vue/reviews/index.html">
 </head>

fiori/server.js

@@ -1,18 +1,19 @@
+const express = require ('express')
 const cds = require ('@sap/cds')
 
 cds.once('bootstrap',(app)=>{
-  app.use ('/orders/webapp', _from('@capire/orders/app/orders/webapp/manifest.json'))
+  const {dirname} = require ('path')
-  app.use ('/bookshop', _from('@capire/bookshop/app/vue/index.html'))
+  // serving the orders app imported from @capire/orders
-  app.use ('/reviews', _from('@capire/reviews/app/vue/index.html'))
+  const orders_app = dirname (require.resolve('@capire/orders/app/orders/webapp/manifest.json'))
+  app.use ('/orders/webapp', express.static(orders_app))
+  // serving the vue.js app imported from @capire/bookshop
+  const bookshop_app = dirname (require.resolve('@capire/bookshop/app/vue/index.html'))
+  app.use ('/vue/bookshop', express.static(bookshop_app))
+  // serving the vue.js app imported from @capire/reviews
+  const reviews_app = dirname (require.resolve('@capire/reviews/app/vue/index.html'))
+  app.use ('/vue/reviews', express.static(reviews_app))
 })
 
 cds.once('served', require('./srv/mashup'))
 
 module.exports = cds.server
-
-
-// -----------------------------------------------------------------------
-// Helper for serving static content from npm-installed packages
-const {static} = require('express')
-const {dirname} = require('path')
-const _from = target => static (dirname (require.resolve(target)))

fiori/test/build/build-task.js

@@ -1,14 +0,0 @@
-const cds = require ('./sap-cds')
-
-module.exports = class extends cds.build.Task {
-
-  async build ({src='*'}) {
-    this.log (`Generating edmx output for '${src}'...`)
-    const csn = await this.model(src)
-    return Promise.all (csn.services.map (({name:service}) => {
-      const edmx = cds.compile(csn).to.edmx({service})
-      return this.write(edmx).to(`{srv}/src/main/resources/${service}.edmx`)
-    }))
-  }
-
-}

fiori/test/build/sap-cds.js

@@ -1,51 +0,0 @@
-const cds = require ('@sap/cds/lib')
-const path = require('path')
-const cwd = process.cwd()
-
-const _resolve = (root,file) => path.resolve (cwd, root, file.replace(/{(app|db|srv)}\/?/g, (_,folder) => cds.env.folders[folder]))
-const _local = (file) => path.relative (cwd,file)
-
-
-class BuildTask {
-
-  async build (options) {}
-  async clean (options) {}
-
-  async model(src='*') {
-    return cds.linked (await cds.load(src))
-  }
-
-  log(...args) { return console.log(...args) }
-  warn(...args) { return console.warn(...args) }
-  error(...args) { return console.error(...args) }
-
-  write(x) {
-    if (typeof x === 'object') x = JSON.stringify(x,null,'  ')
-    return { to: async (dst)=>{
-      const file = _resolve (this.options.dest, dst)
-      await cds.utils.mkdirp (path.dirname (file))
-      await cds.utils.promises.writeFile (file,x)
-      console.log ('> wrote:', _local(file))
-      return file
-    }}
-  }
-
-  copy(x) {
-    return { to: async (dst) => {} }
-  }
-
-}
-
-
-module.exports = Object.assign (cds, {
-  build: {
-    run (tasks, _options) {
-      const options = { dest:'gen', ..._options }
-      return Promise.all(tasks.map (async each => {
-        const task = Object.assign (new each, {options})
-        await task.build (options)
-      }))
-    },
-    Task: BuildTask
-  }
-})

fiori/test/build/test.js

@@ -1,5 +0,0 @@
-const cds = require ('./sap-cds')
-const task = require('./build-task')
-
-cds.build.run ([task], {src:process.argv[2]})
-.catch(console.error)

odata/.npmrc

@@ -0,0 +1 @@
+@sap:registry=http://nexus.wdf.sap.corp:8081/nexus/repository/build.milestones.npm/

odata/.vscode/extensions.json

@@ -0,0 +1,15 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"SirTobi.pegjs-language",
+		"tamuratak.vscode-pegjs",
+		"joeandaverde.vscode-pegjs-live"
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": [
+
+	]
+}

odata/lib/index.js

@@ -0,0 +1,26 @@
+const fs = require("fs");
+const path = require("path");
+const peg = require("pegjs");
+const pegGrammarPath = path.join(__dirname, "/odata2cqn.pegjs");
+const odataPegGrammar = fs.readFileSync(pegGrammarPath, {
+  encoding: "utf8",
+  flag: "r",
+});
+const parser = peg.generate(odataPegGrammar);
+
+
+module.exports = {
+  parse: {
+    url: parser.parse,
+  },
+  to: {
+    cqn: parser.parse,
+    url: (cqn) => pending(cqn)
+  },
+  serialize: (data) => pending(data),
+  deserialize: (body) => pending(body),
+}
+
+const pending = ()=>{
+  throw new Error ('Not yet implemented')
+}

odata/lib/odata2cqn.pegjs

@@ -0,0 +1,200 @@
+/** ------------------------------------------
+ * This is a peg.js adaptation of the https://github.com/oasis-tcs/odata-abnf/blob/master/abnf/odata-abnf-construction-rules.txt
+ * which directly constructs CQN out of parsed sources.
+ *
+ * NOTE:
+ * In contrast to the OData ABNF source, which uses very detailedsemantic rules,
+ * this adaptation uses rather generic syntactic rules only, e.g. not distinguishing
+ * betwenn Collection Navigation or not knowing individual function names.
+ * This is to be open to future enhancements of the OData standard, as well as
+ * to improve error messages. For example a typo in a function name could be
+ * reported specifically instead of throwing a generic parser error.
+ *
+ * See also: https://docs.microsoft.com/en-us/odata/concepts/queryoptions-overview
+ * Future test cases http://docs.oasis-open.org/odata/odata/v4.0/errata03/os/complete/abnf/odata-abnf-testcases.xml
+ *
+ * Limitations: Type, Geo functions are not supported,
+ * maxdatetime, mindatetime, fractionalseconds,
+ * totaloffsetminutes, date, totalseconds,
+ * floor, ceiling also are not supported by CAP
+ *
+ * Examples:
+ * Books
+ * Books/201
+ * Books?$select=ID,title&$expand=author($select=name)&$filter=stock gt 1&$orderby=title
+ */
+
+// ---------- JavaScript Helpers -------------
+	{
+		const stack=[]
+		let SELECT
+	}
+
+// ---------- Entity Paths ---------------
+
+	ODataRelativeURI // Note: case-sensitive!
+		= (p:path { SELECT = { from:p } })
+		( o"?"o QueryOption ( o'&'o QueryOption )* )? {
+			if (SELECT.expand) {
+				SELECT.columns = SELECT.expand
+				delete SELECT.expand
+			}
+			return { SELECT }
+		}
+
+	path
+		= crv:$("$count"/"$ref"/"$value") {return {ref:[crv]}}
+		/ head:identifier filter:(OPEN args CLOSE)? tail:( '/' p:path {return p} )? {
+			const ref = [ filter ? { id:head, where:filter[1] } : head ]
+			if (tail) ref.push (...tail.ref)
+			return {ref}
+		}
+
+	args
+		= val:( number / integer / string ) {return [{val}]}
+		/ ref:identifier o"="o val:( number / integer / string ) more:( COMMA args )? {
+			const args = [ {ref}, '=', {val} ]
+			if (more) args.push ('and', ...more[1])
+			return args
+		}
+
+	ref "a reference"
+		= head:identifier tail:( '/' identifier )* {
+			return { ref:[ head, ...tail ] }
+		}
+
+ //
+// ---------- Query Options ------------
+
+	QueryOption = ExpandOption
+	ExpandOption =
+		"$select="  		o select ( COMMA select )* /
+		"$expand="  		o expand ( COMMA expand )* /
+		"$filter="  		o filter /
+		"$orderby=" 		o orderby /
+		"$top="     		o top /
+		"$skip="    		o skip /
+		"$search=" 			o search /
+		"$count=" 			o count
+
+	select
+		= col:ref {
+			(SELECT.expand || (SELECT.expand = [])).push(col)
+			return col
+		}
+
+	expand =
+		( c:select {c.expand='*'} )
+		( // --- nested query options, if any
+			(OPEN {
+				stack.push (SELECT)
+				SELECT = SELECT.expand[SELECT.expand.length-1]
+				SELECT.expand = []
+			})
+			ExpandOption ( o";"o ExpandOption )*
+			(CLOSE {
+				SELECT = stack.pop()
+			})
+		)? // --- end of nested query options
+		( COMMA expand )?
+
+	top
+		= val:integer {
+			(SELECT.limit || (SELECT.limit={})).rows = {val}
+		}
+
+	skip
+		= val:integer {
+			(SELECT.limit || (SELECT.limit={})).offset = {val}
+		}
+
+	search
+		= p:search_clause {SELECT.search = p}
+		search_clause = p:( n:NOT? {return n?[n]:[]} )(
+			OPEN xpr:search_clause CLOSE {p.push({xpr})}
+			/ val:(identifier/string) {p.push({val})}
+		)( ao:(AND/OR) more:search_clause {p.push(ao,...more)} )*
+		{return p}
+
+	filter
+		= p:where_clause {SELECT.where = p}
+		where_clause = p:( n:NOT? {return n?[n]:[]} )(
+			OPEN xpr:where_clause CLOSE {p.push({xpr})}
+			/ comp:comparison {p.push(...comp)}
+			/ func:boolish {p.push(func)}
+		)( ao:(AND/OR) more:where_clause {p.push(ao,...more)} )*
+		{return p}
+
+	orderby
+		= ref:ref sort:( _ s:$("asc"/"desc") {return s})? {
+			SELECT.orderby = $(ref, sort && {sort})
+		}
+
+	count
+		= c:$[^,?&()]+ { SELECT.count = true }
+
+ //
+// ---------- Expressions ------------
+
+
+	comparison "a comparison"
+		= a:operand _ o:$("eq"/"ne"/"lt"/"gt"/"le"/"ge") _ b:operand {
+			const op = { eq:'=', ne:'!=', lt:'<', gt:'>', le:'<=', ge:'>=' }[o]||o
+			return [ a, op, b ]
+		}
+
+	operand "an operand"
+		= val:number {return Number.isSafeInteger(val) ? {val} : { val:String(val), literal:'number' }}
+		/ val:string {return {val}}
+		/ function
+		/ ref
+
+	function "a function call"
+		= func:$[a-z]+ OPEN a:operand more:( COMMA o:operand {return o} )* CLOSE
+		{ return { func, args:[a,...more] }}
+
+	boolish "a boolean function"
+		= func:("contains"/"endswith"/"startswith") OPEN a:operand COMMA b:operand CLOSE
+		{ return { func, args:[a,b] }}
+
+	NOT = o "not"i _ {return 'not'}
+	AND = _ "and"i _ {return 'and'}
+	OR  = _  "or"i _ {return 'or'}
+
+
+ //
+// ---------- Literals -----------
+
+	string "Edm.String"
+		= "'" s:$("''"/[^'])* "'"
+		{return s.replace(/''/g,"'")}
+
+	number
+		= x:$( [+-]? [0-9]+ ("."[0-9]+)? ("e"[0-9]+)? )
+		{return Number(x)}
+
+	integer
+		= x:$( [+-]? [0-9]+ )
+		{return parseInt(x)}
+
+	identifier
+		= $([a-zA-Z][_a-zA-Z0-9]*)
+
+
+ //
+// ---------- Punctuation ----------
+
+	COLON = o":"o
+	COMMA = o","o
+	SEMI  = o";"o
+	OPEN  = o"("o
+	CLOSE = o")"
+
+ //
+// ---------- Whitespaces -----------
+
+	o "optional whitespaces" = $[ \t\n]*
+	_ "mandatory whitespaces" = $[ \t\n]+
+
+ //
+// ------------------------------------

odata/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@sap/cds-odata",
+  "version": "1.0.0",
+  "dependencies": {
+    "@sap/cds-compiler": "latest",
+    "@sap/cds": "^4.4.10"
+  },
+  "scripts": {
+    "postinstall": "rm -fr node_modules/@sap/cds/node_modules"
+  },
+  "devDependencies": {
+    "pegjs": "^0.10.0"
+  },
+  "private": true
+}

odata/test/odata2cqn.test.js

@@ -0,0 +1,105 @@
+const cds = require("@sap/cds/lib"), {expect} = cds.test
+cds.odata = require("../lib")
+
+describe("$filter", () => {
+
+  describe("comparing expressions", () => {
+
+    const types = {
+      strings: "'some string'",
+      integers: 11,
+      decimals: 0.99,
+      // ...
+    }
+    it.each(Object.keys(types))("should support expressions with %s", (t) => {
+      expect (cds.odata.parse.url(`Foo?$filter=bar eq ${types[t]}`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where bar = ${types[t]}`))
+    })
+
+    const operators = {
+      eq: '=',
+      lt: '<',
+      le: '<=',
+      gt: '>',
+      ge: '>=',
+      ne: '!=',
+      // ...
+    }
+    it.each(Object.keys(operators))("should support comparison operator '%s'", (op) => {
+      expect (cds.odata.parse.url(`Foo?$filter=bar ${op} 11`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where bar ${operators[op]} 11`))
+    })
+
+  });
+
+  describe("logical expressions", () => {
+
+    it.each(['and','or'])("should support '%s'", (t) => {
+      expect (cds.odata.parse.url(`Foo?$filter=bar lt 11 ${t} name eq 'some name'`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where bar < 11 ${t} name = 'some name'`))
+    })
+
+    it("should support 'not'", () => {
+      // REVISIT: We need to check with the Node.js team why they translated that to the equivalent of:
+      // not name like concat('%','sunny','%') escape '^'
+      expect (cds.odata.parse.url(`Foo?$filter= not contains(name,'sunny')`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where not contains(name,'sunny')`))
+    });
+
+    // REVISIT: wait for compiler v2
+    it("should support group expr", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= (unitPrice gt 11 and length(name) eq 12) or name eq 'Restless and Wild'`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where (unitPrice > 11 and length(name) = 12) or name = 'Restless and Wild'`))
+    });
+  });
+
+  describe("function expressions", () => {
+
+    it("should support contains", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= contains(name,'sunny')`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where contains(name,'sunny')`))
+    });
+
+    it("should support startswith", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= startswith(name,'sunny')`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where startswith(name,'sunny')`))
+    });
+
+    it("should support endswith", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= endswith(name,'sunny')`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where endswith(name,'sunny')`))
+    });
+
+    it("should support length", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= length(name) lt 11`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where length(name) < 11`))
+    });
+
+    it("should support indexof", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= indexof(name,'x') eq 11`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where indexof(name,'x') = 11`))
+    });
+
+    it("should support substring", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= substring(name,1) eq 'foo'`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where substring(name,1) = 'foo'`))
+    });
+
+    it.each(['tolower','toupper','trim'])("should support '%s'", (fn) => {
+      expect (cds.odata.parse.url(`Foo?$filter= ${fn}(name) eq 'foo'`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where ${fn}(name) = 'foo'`))
+    });
+
+    it("should support 'day'", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= day(name) eq 11`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where day(name) = 11`))
+    });
+
+    it("should support concat", () => {
+      expect (cds.odata.parse.url(`Foo?$filter= concat(name,'o') eq 'foo'`))
+      .to.eql (cds.parse.cql(`SELECT from Foo where concat(name,'o') = 'foo'`))
+    });
+
+  });
+
+});

orders/db/schema.cds

@@ -21,3 +21,6 @@ entity Orders_Items {
 entity Products @(cds.persistence.skip:'always') {
   key ID : String;
 }
+
+// Activate extension package
+using from '@capire/common';

orders/package.json

@@ -2,6 +2,7 @@
   "name": "@capire/orders",
   "version": "1.0.0",
   "dependencies": {
+    "@capire/common": "*",
     "@sap/cds": "^4.3.0"
   }
 }

package.json

@@ -14,13 +14,14 @@
     "@capire/reviews": "./reviews"
   },
   "devDependencies": {
+    "pegjs": "^0.10.0",
     "chai": "^4.2.0",
     "chai-as-promised": "^7.1.1",
     "chai-subset": "^1.6.0",
-    "sqlite3": "5.0.0"
+    "sqlite3": "^5"
   },
   "scripts": {
-    "registry": "node .registry/server.js",
+    "registry": "cd .registry && node server.js",
     "bookshop": "cds watch bookshop",
     "fiori": "cds watch fiori",
     "media": "cds watch media",