link between servers & groups, clean, bug fix

services/accesses.service.js

@@ -0,0 +1,52 @@
+const Group = require("../model/group.model");
+const Access = require("../model/access.model");
+const Server = require("../model/server.model");
+
+async function addAccess(serverHostname, groupName) {
+    Group.findOne({ where: { name: groupName} }).then((result) => {
+        if (result) {
+            Server.findOne({ where: { hostname: serverHostname } }).then((server) => {
+                if (server) {
+                    Access.findOne({ where: { groupName: result.name, serverHostname: server.hostname } }).then((access) => {
+                        if (!access) {
+                            Access.create({
+                                serverHostname: server.hostname,
+                                groupName: result.name
+                            }).then((access) => {
+                                console.log('access added to database' + '(' + access.serverHostname + ',' + access.groupName + ')')
+                            });
+                        }
+                    })
+                }
+
+            })
+        }
+
+    })
+}
+
+async function delAccess(serverHostname, groupName) {
+    Group.findOne({ where: { name: groupName} }).then((result) => {
+        if (result) {
+            Server.findOne({ where: { hostname: serverHostname } }).then((server) => {
+                if (user) {
+                    Access.findOne({ where: { groupName: result.name, serverHostname: server.hostname } }).then((access) => {
+                        if (access) {
+                            access.destroy()
+                                .then(() => {
+                                    console.log('access deleted from database' + '(' + access.serverHostname + ',' + access.groupName + ')')
+                                });
+                        }
+                    })
+                }
+
+            })
+        }
+
+    })
+}
+
+module.exports = {
+    addAccess,
+    delAccess
+};