From 01143e08e89fc2b048f09f0d30fc1db84f5c8235 Mon Sep 17 00:00:00 2001
From: Ferdinand Thiessen <rpm@fthiessen.de>
Date: Thu, 21 Jan 2021 14:24:46 +0100
Subject: [PATCH] Balance: Added Transfer and Admin view + more

* some work on reverting transactions.
* Added TODO comments on incomplete features
---
 .../balance/components/BalanceHeader.vue      |  44 +++++
 .../balance/components/Transaction.vue        |  76 ++++++++
 src/plugins/balance/pages/Add.vue             | 178 ++++++++++--------
 src/plugins/balance/pages/Admin.vue           |  54 ++++++
 src/plugins/balance/pages/Transfer.vue        | 111 +++++++++++
 src/plugins/balance/permissions.ts            |  21 +++
 src/plugins/balance/plugin.ts                 |   4 +-
 src/plugins/balance/routes/index.ts           |  43 ++---
 src/plugins/balance/store/balance.ts          | 105 +++++++----
 9 files changed, 502 insertions(+), 134 deletions(-)
 create mode 100644 src/plugins/balance/components/BalanceHeader.vue
 create mode 100644 src/plugins/balance/components/Transaction.vue
 create mode 100644 src/plugins/balance/pages/Admin.vue
 create mode 100644 src/plugins/balance/pages/Transfer.vue
 create mode 100644 src/plugins/balance/permissions.ts

diff --git a/src/plugins/balance/components/BalanceHeader.vue b/src/plugins/balance/components/BalanceHeader.vue
new file mode 100644
index 0000000..7d78b8b
--- /dev/null
+++ b/src/plugins/balance/components/BalanceHeader.vue
@@ -0,0 +1,44 @@
+<template>
+  <q-card-section class="fit row justify-left content-center items-center q-col-gutter-sm">
+    <div class="text-h6 col-6">
+      Aktueller Stand: {{ balance.balance.toFixed(2) }} €
+      <q-badge color="negative" align="top" v-if="isLocked"> gesperrt </q-badge>
+    </div>
+    <div v-if="showSelector" class="col-6">
+      <UserSelector :user="user" @update:user="userUpdated" />
+    </div>
+  </q-card-section>
+</template>
+
+<script lang="ts">
+import { ref, computed, defineComponent, onBeforeMount } from '@vue/composition-api';
+import UserSelector from 'src/plugins/user/components/UserSelector.vue';
+import { StateInterfaceBalance, UserBalance } from '../store/balance';
+import { Store } from 'vuex';
+
+interface Props {
+    showSelector: boolean;
+}
+
+export default defineComponent({
+  name: 'BalanceHeader',
+  components: { UserSelector },
+  props: ['showSelector'],
+  setup(props: Props, { root, emit }) {
+    onBeforeMount(() => void store.dispatch('balance/getBalance'));
+    const store = <Store<StateInterfaceBalance>>root.$store;
+    const user = ref(<FG.User>store.state.user.currentUser);
+    const balance = computed(() => {const balances = store.state.balance.balances; return balances.get(user.value.userid) || {balance: 0, limit: null} ;});
+
+    const isLocked = computed(() => balance.value.limit !== null && balance.value.balance >= balance.value.limit);
+
+    function userUpdated(selectedUser: FG.User) {
+        void store.dispatch('balance/getBalance', selectedUser);
+        user.value = selectedUser;
+        emit('update:user', selectedUser);
+    }
+
+    return { user, balance, isLocked, userUpdated };
+  }
+});
+</script>
diff --git a/src/plugins/balance/components/Transaction.vue b/src/plugins/balance/components/Transaction.vue
new file mode 100644
index 0000000..5e51920
--- /dev/null
+++ b/src/plugins/balance/components/Transaction.vue
@@ -0,0 +1,76 @@
+<template>
+  <q-card>
+    <q-card-actions align="right">
+      <q-btn
+        :color="color()"
+        icon="mdi-trash-can"
+        aria-label="Löschen"
+        :disable="disabled()"
+        @click="reverse(transaction)"
+      />
+    </q-card-actions>
+    <q-card-section>
+      <span>{{ timeStr }}: {{ transaction.amount }}</span>
+    </q-card-section>
+  </q-card>
+</template>
+
+<script lang="ts">
+// TODO: Better styling
+
+import { ref, computed, defineComponent, onUnmounted } from '@vue/composition-api';
+import { hasPermission } from 'src/utils/permission';
+import { formatDateTime } from 'src/utils/datetime';
+import { StateInterfaceBalance } from 'src/plugins/balance/store/balance';
+import { Store } from 'vuex';
+
+interface Props {
+  transaction: FG.Transaction;
+}
+
+export default defineComponent({
+  name: 'Transaction',
+  props: ['transaction'],
+  setup(props: Props, { root, emit }) {
+    const now = ref(Date.now());
+    const ival = setInterval(() => (now.value = Date.now()), 1000);
+    const store: Store<StateInterfaceBalance> = <Store<StateInterfaceBalance>>root.$store;
+
+    onUnmounted(() => clearInterval(ival));
+
+    function canReverse(transaction: FG.Transaction) {
+      return (
+        hasPermission('balance_reversal', store) ||
+        (transaction.sender_id === store.state.user.currentUser?.userid &&
+          Date.now() - transaction.time.getTime() < 10000)
+      );
+    }
+
+    function color() {
+      return canReverse(props.transaction) ? 'negative' : 'grey';
+    }
+
+    function disabled() {
+      return !canReverse(props.transaction);
+    }
+
+    function reverse(transaction: FG.Transaction) {
+      if (canReverse(transaction))
+        store
+          .dispatch('balance/revert', transaction)
+          .then(() => {
+            emit('reversed', transaction.id);
+          })
+          .catch(error => console.log(error));
+    }
+
+    const timeStr = computed(() => {
+      const elapsed = (now.value - props.transaction.time.getTime()) / 1000;
+      if (elapsed < 60) return `Vor ${elapsed.toFixed()} s`;
+      return formatDateTime(props.transaction.time, elapsed > 12 * 60 * 60, true, true) + ' Uhr';
+    });
+
+    return { timeStr, disabled, color, reverse };
+  }
+});
+</script>
diff --git a/src/plugins/balance/pages/Add.vue b/src/plugins/balance/pages/Add.vue
index 65862e4..37b529e 100644
--- a/src/plugins/balance/pages/Add.vue
+++ b/src/plugins/balance/pages/Add.vue
@@ -1,95 +1,123 @@
 <template>
-  <q-page padding>
-    <q-card>
-      <q-card-section class="row">
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="2€"
-            @click="changeBalance(-2)"
-          />
-        </div>
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="1€"
-            @click="changeBalance(-1)"
-          />
-        </div>
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="0,50€"
-            @click="changeBalance(-0.5)"
-          />
-        </div>
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="0,40€"
-            @click="changeBalance(-0.4)"
-          />
-        </div>
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="0,20€"
-            @click="changeBalance(-0.2)"
-          />
-        </div>
-        <div class="col-4 row q-pa-sm">
-          <q-btn
-            class="col"
-            color="green"
-            label="0,10€"
-            @click="changeBalance(-0.1)"
-          />
-        </div>
-      </q-card-section>
-      <q-card-section>
-        <div class="text-h6">{{ balance.toFixed(2) }} €</div>
-      </q-card-section>
-      <q-card-actions>
-        <q-btn label="test" @click="$store.dispatch('balance/getBalance')" />
-      </q-card-actions>
-    </q-card>
+  <q-page padding class="fit row justify-left q-col-gutter-sm">
+    <div class="col-12">
+      <q-card>
+        <BalanceHeader @update:user="userUpdated" :showSelector="showSelector" />
+        <q-separator />
+
+        <q-card-section class="row q-col-gutter-md" v-if="shortCuts">
+          <div v-for="(amount, index) in shortCuts" v-bind:key="index" class="col-4">
+            <q-btn
+              color="primary"
+              style="width: 100%"
+              :label="amount.toFixed(2).toString() + ' €'"
+              @click="changeBalance(amount)"
+            />
+          </div>
+        </q-card-section>
+        <q-card-section class="row q-col-gutter-md items-center">
+          <div class="col-sm-4 col-xs-12">
+            <q-input
+              v-model.number="amount"
+              type="number"
+              filled
+              label="Eigener Betrag"
+              step="0.1"
+              min="0"
+            />
+          </div>
+          <div class="col-sm-4 col-xs-6">
+            <q-btn
+              style="width: 100%"
+              color="primary"
+              label="Anschreiben"
+              @click="changeBalance(amount * -1)"
+              ><q-tooltip>Rechtsklick um Betrag als Verknüpfung hinzuzufügen</q-tooltip>
+              <q-popup-proxy context-menu v-model="showAddShortcut">
+                <q-btn label="neue Verknüpfung" @click="addShortcut" /></q-popup-proxy
+            ></q-btn>
+          </div>
+          <div class="col-sm-4 col-xs-6">
+            <q-btn
+              style="width: 100%"
+              color="secondary"
+              label="Gutschreiben"
+              @click="changeBalance(amount)"
+            />
+          </div>
+        </q-card-section>
+      </q-card>
+    </div>
+    <div v-for="(transaction, index) in transactions" v-bind:key="index" class="col-sm-4 col-xs-6">
+      <Transaction :transaction="transaction" @reversed="reversed" />
+    </div>
   </q-page>
 </template>
 
 <script lang="ts">
-import { computed, defineComponent, onBeforeMount } from '@vue/composition-api';
-import { BalanceInterface } from 'src/plugins/balance/store/balance';
+// TODO: Shortcuts are not displayed when first loaded
+
+import { computed, ref, defineComponent, onBeforeMount } from '@vue/composition-api';
+import { hasPermission } from 'src/utils/permission';
+import { StateInterfaceBalance } from '../store/balance';
 import { Store } from 'vuex';
+import Transaction from '../components/Transaction.vue';
+import BalanceHeader from '../components/BalanceHeader.vue';
+import PERMISSIONS from '../permissions';
 
 export default defineComponent({
-  // name: 'PageName'
+  name: 'BalanceAdd',
+  components: { Transaction, BalanceHeader },
   setup(_, { root }) {
-    onBeforeMount(() => {
-      store.dispatch('balance/getBalance').catch(err => {
-        console.warn(err);
-      });
-    });
+    onBeforeMount(() => void store.dispatch('balance/getShortcuts'));
+    const store = <Store<StateInterfaceBalance>>root.$store;
 
-    const store: Store<{ balance: BalanceInterface }> = <
-      Store<{ balance: BalanceInterface }>
-    >root.$store;
+    const amount = ref<number>(0);
+    const showAddShortcut = ref(false);
+    const transactions = ref<FG.Transaction[]>([]);
+    const user = ref(store.state.user.currentUser);
+    const shortCuts = ref(store.state.balance.shortcuts);
 
-    const balance = computed<number>(() => {
-      return store.state.balance.balance;
-    });
+    const showSelector = computed(
+      () => hasPermission(PERMISSIONS.DEBIT, store) || hasPermission(PERMISSIONS.CREDIT, store)
+    );
 
+    function addShortcut() {
+      // TODO: Save shortcuts on backend
+      showAddShortcut.value = false;
+      console.log(amount);
+    }
+    function userUpdated(selectedUser: FG.User) {
+      user.value = selectedUser;
+    }
     function changeBalance(amount: number) {
       store
-        .dispatch('balance/changeBalance', amount)
+        .dispatch('balance/changeBalance', { amount: amount, user: user.value?.userid })
+        .then((transaction: FG.Transaction) => {
+          if (transactions.value.length > 5) transactions.value.pop();
+          transaction.time = new Date(transaction.time);
+          transactions.value.unshift(transaction);
+          console.log(transactions.value);
+        })
         .catch(err => console.log(err));
     }
 
-    return { balance, changeBalance };
+    function reversed(id: number) {
+      transactions.value = transactions.value.filter(t => t.id != id);
+    }
+
+    return {
+      user,
+      addShortcut,
+      showAddShortcut,
+      changeBalance,
+      transactions,
+      amount,
+      showSelector,
+      shortCuts,
+      reversed,
+      userUpdated
+    };
   }
 });
 </script>
diff --git a/src/plugins/balance/pages/Admin.vue b/src/plugins/balance/pages/Admin.vue
new file mode 100644
index 0000000..a0c0eb1
--- /dev/null
+++ b/src/plugins/balance/pages/Admin.vue
@@ -0,0 +1,54 @@
+<template>
+  <div>
+    <q-page padding>
+      <q-card>
+        <q-card-section>
+          <q-table :data="rows" row-key="userid" :columns="columns" />
+        </q-card-section>
+      </q-card>
+    </q-page>
+  </div>
+</template>
+
+<script lang="ts">
+// TODO: Load all users / balances
+
+// TODO: Fill usefull data
+
+import { computed, defineComponent } from '@vue/composition-api';
+import { StateInterfaceBalance } from '../store/balance';
+import { Store } from 'vuex';
+export default defineComponent({
+  // name: 'PageName'
+  setup(_, { root }) {
+    const store = <Store<StateInterfaceBalance>>root.$store;
+
+    const rows = computed(() => {
+      const fo: Array<{ userid: string; balance: number }> = [];
+      store.state.balance.balances.forEach((value, key) =>
+        fo.push(Object.assign(value, { userid: key }))
+      );
+      return fo;
+    });
+
+    const columns = [
+      {
+        name: 'userid',
+        label: 'Benutzer ID',
+        field: 'userid',
+        required: true,
+        align: 'left',
+        sortable: true
+      },
+      { name: 'balance', label: 'Kontostand', field: 'balance' },
+      {
+        name: 'limit',
+        label: 'Limit',
+        field: 'limit',
+        format: (val: number) => (val === null ? 'keins' : val)
+      }
+    ];
+    return { rows, columns };
+  }
+});
+</script>
diff --git a/src/plugins/balance/pages/Transfer.vue b/src/plugins/balance/pages/Transfer.vue
new file mode 100644
index 0000000..83a7f0e
--- /dev/null
+++ b/src/plugins/balance/pages/Transfer.vue
@@ -0,0 +1,111 @@
+<template>
+  <q-page padding class="fit row justify-left q-col-gutter-sm">
+    <div class="col-12">
+      <q-card>
+        <BalanceHeader @update:user="senderUpdated" :showSelector="showSelector" />
+        <q-separator />
+        <q-card-section class="row q-col-gutter-md items-center">
+          <div class="col-sm-4 col-xs-12">
+            <q-input
+              v-model.number="amount"
+              type="number"
+              filled
+              label="Betrag"
+              step="0.1"
+              min="0"
+            />
+          </div>
+          <div class="col-sm-4 col-xs-6">
+            <UserSelector :user="receiver" @update:user="receiverUpdated" label="Empfänger" />
+          </div>
+          <div class="col-sm-4 col-xs-6">
+            <q-btn
+              style="width: 100%"
+              color="primary"
+              :disable="sendDisabled"
+              label="Senden"
+              @click="sendAmount"
+            />
+          </div>
+        </q-card-section>
+      </q-card>
+    </div>
+    <div v-for="(transaction, index) in transactions" v-bind:key="index" class="col-sm-4 col-xs-6">
+      <Transaction :transaction="transaction" @reversed="reversed" />
+    </div>
+  </q-page>
+</template>
+
+<script lang="ts">
+import { computed, ref, defineComponent } from '@vue/composition-api';
+import { hasPermission } from 'src/utils/permission';
+import { StateInterfaceBalance } from '../store/balance';
+import { Store } from 'vuex';
+import UserSelector from 'src/plugins/user/components/UserSelector.vue';
+import Transaction from '../components/Transaction.vue';
+import BalanceHeader from '../components/BalanceHeader.vue';
+import PERMISSIONS from '../permissions';
+
+export default defineComponent({
+  name: 'BalanceTransfer',
+  components: { Transaction, BalanceHeader, UserSelector },
+  setup(_, { root }) {
+    const store: Store<StateInterfaceBalance> = <Store<StateInterfaceBalance>>root.$store;
+
+    const showSelector = computed(() => hasPermission(PERMISSIONS.SEND_OTHER, store));
+    const sender = ref(store.state.user.currentUser);
+    const receiver = ref<FG.User | undefined>(undefined);
+    const amount = ref<number>(0);
+    const transactions = ref<FG.Transaction[]>([]);
+
+    const sendDisabled = computed(() => {
+      return !(
+        receiver.value &&
+        sender.value &&
+        sender.value.userid != receiver.value.userid &&
+        amount.value > 0
+      );
+    });
+
+    function senderUpdated(selectedUser: FG.User) {
+      console.log(selectedUser);
+      sender.value = selectedUser;
+    }
+    function receiverUpdated(selectedUser: FG.User) {
+      receiver.value = selectedUser;
+    }
+
+    function reversed(id: number) {
+      transactions.value = transactions.value.filter(value => value.id != id);
+    }
+
+    function sendAmount() {
+      store
+        .dispatch('balance/changeBalance', {
+          amount: amount.value,
+          sender: sender.value?.userid,
+          user: receiver.value?.userid
+        })
+        .then((transaction: FG.Transaction) => {
+          if (transactions.value.length > 5) transactions.value.pop();
+          transaction.time = new Date(transaction.time);
+          transactions.value.unshift(transaction);
+        })
+        .catch(err => console.log(err));
+    }
+
+    return {
+      sender,
+      receiver,
+      amount,
+      sendAmount,
+      transactions,
+      showSelector,
+      senderUpdated,
+      receiverUpdated,
+      sendDisabled,
+      reversed
+    };
+  }
+});
+</script>
diff --git a/src/plugins/balance/permissions.ts b/src/plugins/balance/permissions.ts
new file mode 100644
index 0000000..0543207
--- /dev/null
+++ b/src/plugins/balance/permissions.ts
@@ -0,0 +1,21 @@
+const PERMISSIONS = {
+  // Show own and others balance
+  SHOW: 'balance_show',
+  SHOW_OTHER: 'balance_show_others',
+  // Credit balance (give)
+  CREDIT: 'balance_credit',
+  // Debit balance (take)
+  DEBIT: 'balance_debit',
+  // Debit own balance only
+  DEBIT_OWN: 'balance_debit_own',
+  // Send from to other
+  SEND: 'balance_send',
+  // Send from other to another
+  SEND_OTHER: 'balance_send_others',
+  // Can set limit for users
+  SET_LIMIT: 'balance_set_limit',
+  //Allow sending / sub while exceeding the set limit
+  EXCEED_LIMIT: 'balance_exceed_limit'
+};
+
+export default PERMISSIONS;
diff --git a/src/plugins/balance/plugin.ts b/src/plugins/balance/plugin.ts
index b411f8c..f84d72c 100644
--- a/src/plugins/balance/plugin.ts
+++ b/src/plugins/balance/plugin.ts
@@ -1,12 +1,12 @@
 import { Module } from 'vuex';
 import { StateInterface } from 'src/store';
-import mainRoutes from './routes';
+import routes from './routes';
 import { FG_Plugin } from 'src/plugins';
 import balance, { BalanceInterface } from './store/balance';
 
 const plugin: FG_Plugin.Plugin = {
   name: 'Balance',
-  mainRoutes,
+  mainRoutes: routes,
   requiredModules: ['User'],
   requiredBackendModules: ['balance'],
   version: '0.0.1',
diff --git a/src/plugins/balance/routes/index.ts b/src/plugins/balance/routes/index.ts
index 1b4a1f0..e84aa82 100644
--- a/src/plugins/balance/routes/index.ts
+++ b/src/plugins/balance/routes/index.ts
@@ -1,24 +1,5 @@
 import { FG_Plugin } from 'src/plugins';
-
-const permissions = {
-  // Show own and others balance
-  SHOW: 'balance_show',
-  SHOW_OTHER: 'balance_show_others',
-  // Credit balance (give)
-  CREDIT: 'balance_credit',
-  // Debit balance (take)
-  DEBIT: 'balance_debit',
-  // Debit own balance only
-  DEBIT_OWN: 'balance_debit_own',
-  // Send from to other
-  SEND: 'balance_send',
-  // Send from other to another
-  SEND_OTHER: 'balance_send_others',
-  // Can set limit for users
-  SET_LIMIT: 'balance_set_limit',
-  //Allow sending / sub while exceeding the set limit
-  EXCEED_LIMIT: 'balance_exceed_limit'
-};
+import permissions from '../permissions';
 
 const mainRoutes: FG_Plugin.PluginRouteConfig[] = [
   {
@@ -26,17 +7,33 @@ const mainRoutes: FG_Plugin.PluginRouteConfig[] = [
     icon: 'mdi-cash-100',
     path: 'balance',
     name: 'balance',
-    component: () => import('../pages/MainPage.vue'),
+    redirect: { name: 'balance-add' },
     meta: { permissions: ['user'] },
     children: [
       {
         title: 'Anschreiben',
-        icon: 'mdi-cash-100',
-        path: 'balance-add',
+        icon: 'mdi-cash-plus',
+        path: 'add',
         name: 'balance-add',
         shortcut: true,
         meta: { permissions: [permissions.DEBIT_OWN, permissions.SHOW] },
         component: () => import('../pages/Add.vue')
+      },
+      {
+        title: 'Übertragen',
+        icon: 'mdi-cash-refund',
+        path: 'transfer',
+        name: 'balance-transfer',
+        meta: { permissions: [permissions.SEND] },
+        component: () => import('../pages/Transfer.vue')
+      },
+      {
+        title: 'Verwaltung',
+        icon: 'mdi-account-cash',
+        path: 'admin',
+        name: 'balance-admin',
+        meta: { permissions: [permissions.DEBIT_OWN, permissions.SHOW] },
+        component: () => import('../pages/Admin.vue')
       }
     ]
   }
diff --git a/src/plugins/balance/store/balance.ts b/src/plugins/balance/store/balance.ts
index f86939f..505111b 100644
--- a/src/plugins/balance/store/balance.ts
+++ b/src/plugins/balance/store/balance.ts
@@ -9,51 +9,75 @@ interface BalanceResponse {
   debit: number;
 }
 
-export interface BalanceInterface extends BalanceResponse {
-  limit: number;
+export interface UserBalance extends BalanceResponse {
+  limit: number | null;
+}
+
+export interface BalanceInterface {
+  balances: Map<string, UserBalance>;
+  shortcuts: Array<number>;
   loading: number;
 }
 
+export interface StateInterfaceBalance extends StateInterface {
+  balance: BalanceInterface;
+}
+
 const state: BalanceInterface = {
-  balance: 0,
-  credit: 0,
-  debit: 0,
-  limit: 0,
+  balances: new Map<string, UserBalance>(),
+  shortcuts: [],
   loading: 0
 };
 
 const mutations: MutationTree<BalanceInterface> = {
-  setBalance(state, data: number) {
-    state.balance = data;
+  setBalance(state, data: { userid: string; balance: BalanceResponse }) {
+    state.balances.set(
+      data.userid,
+      Object.assign({ limit: state.balances.get(data.userid)?.limit || null }, data.balance)
+    );
   },
-  setCredit(state, data: number) {
-    state.credit = data;
+  changeBalance(state, data: { userid: string; amount: number }) {
+    const user = <UserBalance>state.balances.get(data.userid);
+    if (data.amount < 0) user.debit += data.amount;
+    else user.credit += data.amount;
+    user.balance += data.amount;
   },
-  setDebit(state, data: number) {
-    state.debit = data;
-  },
-  setLimit(state, data: number) {
-    state.limit = data;
+  setLimit(state, data: { userid: string; limit: number | null }) {
+    if (state.balances.has(data.userid))
+      (<UserBalance>state.balances.get(data.userid)).limit = data.limit;
+    else state.balances.set(data.userid, { balance: 0, debit: 0, credit: 0, limit: data.limit });
   },
   setLoading(state, data = true) {
     if (data) state.loading += 1;
     else state.loading -= 1;
+  },
+  setShortcuts(state, data: Array<number>) {
+    state.shortcuts = data.sort().reverse();
   }
 };
 
 const actions: ActionTree<BalanceInterface, StateInterface> = {
-  getBalance({ commit, rootState }) {
+  getShortcuts({ commit, state, rootState }, force = false) {
+    if (force || state.shortcuts.length == 0) {
+      commit('setLoading');
+      const user = <FG.User>rootState.user.currentUser;
+      return axios
+        .get(`/users/${user.userid}/balance/shortcuts`)
+        .then(({ data }: AxiosResponse<BalanceResponse>) => {
+          commit('setShortcuts', data);
+          return data;
+        })
+        .finally(() => commit('setLoading', false));
+    }
+  },
+  getBalance({ commit, rootState }, user: FG.User | undefined = undefined) {
     commit('setLoading');
-    axios
-      /* eslint-disable-next-line @typescript-eslint/restrict-template-expressions */
-      .get(`/users/${rootState.user.currentUser?.userid}/balance`)
+    if (!user) user = <FG.User>rootState.user.currentUser;
+    return axios
+      .get(`/users/${user.userid}/balance`)
       .then(({ data }: AxiosResponse<BalanceResponse>) => {
-        commit('setBalance', data.balance);
-        commit('setCredit', data.credit);
-        commit('setDebit', data.debit);
-      })
-      .catch(err => {
-        console.warn(err);
+        commit('setBalance', { userid: user?.userid, balance: data });
+        return data;
       })
       .finally(() => commit('setLoading', false));
   },
@@ -70,19 +94,32 @@ const actions: ActionTree<BalanceInterface, StateInterface> = {
       })
       .finally(() => commit('setLoading', false));
   },
-  changeBalance({ rootState, dispatch, commit }, amount: number) {
+  revert({ dispatch }, transaction: FG.Transaction) {
+    return axios.delete(`/balance/${transaction.id}`).then(() => {
+      dispatch('getBalance').catch(err => console.warn(err));
+    });
+  },
+  changeBalance({ dispatch, commit }, data: { amount: number; user: string; sender?: string }) {
     commit('setLoading');
-    axios
-      /* eslint-disable-next-line @typescript-eslint/restrict-template-expressions */
-      .put(`/users/${rootState.user.currentUser?.userid}/balance`, <
-        { amount: number }
-      >{
-        amount: amount
+    return axios
+      .put(`/users/${data.user}/balance`, data)
+      .then((response: AxiosResponse<FG.Transaction>) => {
+        commit(state.balances.has(data.user) ? 'changeBalance' : 'setBalance', {
+          userid: data.user,
+          amount: data.amount
+        });
+        if (data.sender)
+          commit(state.balances.has(data.sender) ? 'changeBalance' : 'setBalance', {
+            userid: data.sender,
+            amount: -1 * data.amount
+          });
+        return response.data;
       })
-      .then(() => {
+      .catch(err => {
+        // Maybe Balance changed
         dispatch('getBalance').catch(err => console.warn(err));
+        console.warn(err);
       })
-      .catch(err => console.warn(err))
       .finally(() => commit('setLoading', false));
   }
 };