Validate different email address

webapp/locales/de.json

@@ -159,6 +159,9 @@
       "success": "Deine Daten wurden erfolgreich aktualisiert!"
     },
     "email": {
+      "validation": {
+        "same-email": "Muss sich unterscheiden von der jetzigen E-Mail Addresse"
+      },
       "name": "Deine E-Mail",
       "labelEmail": "E-Mail Adresse ändern",
       "labelNewEmail": "Neue E-Mail Adresse",

webapp/locales/en.json

@@ -160,6 +160,9 @@
       "success": "Your data was successfully updated!"
     },
     "email": {
+      "validation": {
+        "same-email": "Must be different from your current E-Mail address"
+      },
       "name": "Your E-Mail",
       "labelEmail": "Change your E-Mail address",
       "labelNewEmail": "New E-Mail Address",

webapp/pages/settings/my-email-address/index.vue

@@ -32,9 +32,6 @@ export default {
   data() {
     return {
       success: false,
-      formSchema: {
-        email: { type: 'email', required: true },
-      },
     }
   },
   computed: {
@@ -54,6 +51,24 @@ export default {
         this.formData = formData
       },
     },
+    formSchema() {
+      const { email } = this.currentUser
+      const sameEmailValidationError = this.$t('settings.email.validation.same-email')
+      return {
+        email: [
+          { type: 'email', required: true },
+          {
+            validator(rule, value, callback, source, options) {
+              const errors = []
+              if (email === value) {
+                errors.push(sameEmailValidationError)
+              }
+              return errors
+            },
+          },
+        ],
+      }
+    },
   },
   methods: {
     async submit() {