Add filter function

.gitignore

@@ -0,0 +1 @@
+.~lock.*

ddtrust-backend-master/index.js

@@ -385,9 +385,9 @@ function findAll(object) {
     return list;
 }
 
-app.get('/ddtrust/cepi/:rights', async (request, response) => {
+async function resultList(cb_filter, rights) {
     // read parameters from DB and only return accessible
-    let deviceParameters = await queryDevice("%Cepi%", convert_rights(request.params.rights));
+    let deviceParameters = await queryDevice(cb_filter, convert_rights(rights));
 
     // read paremeter description file
     let descriptions = JSON.parse(fs.readFileSync('resources/variable_description.json', 'utf8'));
@@ -398,7 +398,31 @@ app.get('/ddtrust/cepi/:rights', async (request, response) => {
     // combine description information with parameters queried from DB
     let result = await createResultList(deviceParameters, descriptions, calculations);
 
-    response.json(result)
+    return result;
+}
+
+app.get('/ddtrust/cepi/:rights', async (request, response) => {
+    let result_list = await resultList("%Cepi%", request.params.rights);
+
+    response.json(result_list)
+})
+
+app.get('ddtrust/cepi/:rights/filter', async (request, response) => {
+    let result_list = await resultList("%Cepi%", request.params.rights);
+
+    // column | variable name
+    // ----------------------
+    // B      | finished_product
+    // C      | base_material
+    // D      | coating
+    // E      | fillers
+    // F      | polymers
+    // G      | artificial_fibre
+    // H      | ???
+    // I      | printed
+    // J      | varnish
+    // K      | glue
+    // L      | sealing
 })
 
 app.listen(PORT, () => {