create mcda endpoint and function

lib/mcda.js

@@ -0,0 +1,23 @@
+const pl = require("nodejs-polars");
+
+
+const mcda = function(body){
+    if(body === undefined || !body instanceof Object) return {error: "body must be an array of ids"}
+    if(!(body instanceof Array)) return {error: "body must be an array of ids"}
+
+    let df = pl.readCSV("public/technologies.csv")
+
+    wrong_ids = body.filter(e => !df['id'].toArray().includes(e))
+    if (wrong_ids.length > 0) return {error: "some ids are not valid"}
+
+    df = df.filter(pl.col("id").isIn(body))
+
+    // TODO: Començar a calcular scores
+
+
+    return(df.toRecords())
+}
+
+module.exports = {
+    mcda
+}

routes/treatment.js

@@ -62,6 +62,23 @@ router.post('/find-nbs-multiple', function(req, res){
   }
 })
 
+router.post('/mcda', function (req, res) {
+  try {
+    let result = findNBS.findNBS(req.body)
+
+    if (result.error) {
+      res.statusMessage = result.error
+      res.status(400)
+      res.send(result.error)
+    } else {
+      res.send(result)
+    }
+  }
+  catch (e){
+    res.send(e)
+  }
+})
+
 module.exports = router;
 
 

tests/test-find-nbs.js

@@ -1,6 +1,5 @@
 const findNBS = require("../lib/find-nbs").findNBS
 const expect = require("chai").expect
-const should = require("chai").should()
 const jstat = require("jstat")
 
 
@@ -12,7 +11,7 @@ describe("Test /find-nbs", () => {
     describe('findNBS returns an array of technologies', () => {
        let result = findNBS({})
        it("result is an array", () => {
-           result.should.be.an('array')
+           expect(result).to.be.an('array')
        });
        it('technologies have id', () => {
            expect(result[1]).to.have.any.keys("id")

tests/test-mcda.js

@@ -0,0 +1,25 @@
+const expect = require("chai").expect
+const mcda = require("../lib/mcda").mcda
+
+describe('Test /mcda', () => {
+    describe("Raise errors on data sanitation", () => {
+        it('Returns error if no body', () => {
+            expect(mcda()).to.have.key('error')
+        });
+        it('Returns error if body is not an array', () => {
+            expect(mcda({a: 'dsvsddf', b: 'aasdf'})).to.have.key('error')
+            expect(mcda('dsvsddf')).to.have.key('error')
+            expect(mcda(123)).to.have.key('error')
+        });
+        it('Returns error if some ids are wrong', () => {
+            result = mcda(['a', 'WW', 'French_CW'])
+            expect(result).to.have.key("error")
+        })
+    });
+    describe("Returns an array of technologies", () => {
+        let result = mcda(['WW', 'French_CW', 'HSSF_CW'])
+        it('result is an array', () => {
+            expect(result).to.be.an('array')
+        })
+    })
+})