Added year filter

front/src/filters.js

@@ -35,6 +35,12 @@ export function momentFormat (date, format) {
 
 Vue.filter('moment', momentFormat)
 
+export function year (date) {
+  return moment(date).year()
+}
+
+Vue.filter('year', year)
+
 export function capitalize (str) {
   return str.charAt(0).toUpperCase() + str.slice(1)
 }

front/test/unit/specs/filters/filters.spec.js

-import {truncate, markdown, ago, capitalize} from '@/filters'
+import {truncate, markdown, ago, capitalize, year} from '@/filters'
 
 describe('filters', () => {
   describe('truncate', () => {
@@ -32,6 +32,13 @@ describe('filters', () => {
       expect(output).to.equal('a few seconds ago')
     })
   })
+  describe('year', () => {
+    it('works', () => {
+      const input = '2017-07-13'
+      let output = year(input)
+      expect(output).to.equal(2017)
+    })
+  })
   describe('capitalize', () => {
     it('works', () => {
       const input = 'hello world'