Moderator system

Closes #2357

src/client/app/admin/views/moderators.vue

@@ -0,0 +1,61 @@
+<template>
+<div class="jnhmugbb">
+	<ui-card>
+		<div slot="title"><fa icon="plus"/> {{ $t('add-moderator.title') }}</div>
+		<section class="fit-top">
+			<ui-input v-model="username" type="text">
+				<span slot="prefix">@</span>
+			</ui-input>
+			<ui-button @click="add" :disabled="adding">{{ $t('add-moderator.add') }}</ui-button>
+		</section>
+	</ui-card>
+</div>
+</template>
+
+<script lang="ts">
+import Vue from 'vue';
+import i18n from '../../i18n';
+import parseAcct from "../../../../misc/acct/parse";
+
+export default Vue.extend({
+	i18n: i18n('admin/views/moderators.vue'),
+
+	data() {
+		return {
+			username: '',
+			adding: false
+		};
+	},
+
+	methods: {
+		async add() {
+			this.adding = true;
+
+			const process = async () => {
+				const user = await this.$root.api('users/show', parseAcct(this.username));
+				await this.$root.api('admin/moderators/add', { userId: user.id });
+				this.$root.alert({
+					type: 'success',
+					text: this.$t('add-moderator.added')
+				});
+			};
+
+			await process().catch(e => {
+				this.$root.alert({
+					type: 'error',
+					text: e
+				});
+			});
+
+			this.adding = false;
+		},
+	}
+});
+</script>
+
+<style lang="stylus" scoped>
+.jnhmugbb
+	@media (min-width 500px)
+		padding 16px
+
+</style>