* Page for single contract

feature: #9

src/service/ContractsService.js

@@ -0,0 +1,33 @@
+import HttpClient from '../api/HttpClient'
+import router from '../router'
+
+//Request in order to retrieve all contracts and print in table
+//Backend: extra roles check. Allow admin, verwaltung, employee.
+//REST: GET /contracts
+//Auth: provide auth token in request
+//OnError: redirect to page /error?message=somemessage&code=404
+export async function getContracts() {
+  return HttpClient.get('contracts') //todo: provide here auth header
+    .then(resp => {
+      return resp.data.contracts
+    })
+    .catch(error => {
+      router.push('/error?message=' + error.message + '&code=' + error.code)
+    })
+}
+
+//Request in order to retrieve specific contract using ID
+//Backend: extra roles check. Allow admin, verwaltung, employee.
+//REST: GET /contract?id=someId
+//Auth: provide auth token in request
+//OnError: redirect to page /error?message=somemessage&code=404
+export async function getContractById(identifier) {
+  return HttpClient.get('/contract', { params: { id: 'TESTID' } })
+    .then(resp => {
+      //todo: send also auth token with request
+      return resp.data
+    })
+    .catch(error => {
+      router.push('/error?message=' + error.message + '&code=' + error.code)
+    })
+}