misskey/src/web/app/desktop/views/components/follow-button.vue

<template>
<button class="mk-follow-button"
	:class="{ wait, follow: !user.is_following, unfollow: user.is_following }"
	v-if="!init"
	@click="onClick"
	:disabled="wait"
	:title="user.is_following ? 'フォロー解除' : 'フォローする'"
>
	<template v-if="!wait && user.is_following">%fa:minus%</template>
	<template v-if="!wait && !user.is_following">%fa:plus%</template>
	<template v-if="wait">%fa:spinner .pulse .fw%</template>
</button>
</template>

<script lang="ts">
import Vue from 'vue';
export default Vue.extend({
	props: {
		user: {
			type: Object,
			required: true
		}
	},
	data() {
		return {
			wait: false,
			connection: null,
			connectionId: null
		};
	},
	mounted() {
		this.connection = this.$root.$data.os.stream.getConnection();
		this.connectionId = this.$root.$data.os.stream.use();

		this.connection.on('follow', this.onFollow);
		this.connection.on('unfollow', this.onUnfollow);
	},
	beforeDestroy() {
		this.connection.off('follow', this.onFollow);
		this.connection.off('unfollow', this.onUnfollow);
		this.$root.$data.os.stream.dispose(this.connectionId);
	},
	methods: {

		onFollow(user) {
			if (user.id == this.user.id) {
				this.user.is_following = user.is_following;
			}
		},

		onUnfollow(user) {
			if (user.id == this.user.id) {
				this.user.is_following = user.is_following;
			}
		},

		onClick() {
			this.wait = true;
			if (this.user.is_following) {
				this.$root.$data.os.api('following/delete', {
					user_id: this.user.id
				}).then(() => {
					this.user.is_following = false;
				}).catch(err => {
					console.error(err);
				}).then(() => {
					this.wait = false;
				});
			} else {
				this.$root.$data.os.api('following/create', {
					user_id: this.user.id
				}).then(() => {
					this.user.is_following = true;
				}).catch(err => {
					console.error(err);
				}).then(() => {
					this.wait = false;
				});
			}
		}
	}
});
</script>

<style lang="stylus" scoped>
.mk-follow-button
	display block

	> button
	> .init
		display block
		cursor pointer
		padding 0
		margin 0
		width 32px
		height 32px
		font-size 1em
		outline none
		border-radius 4px

		*
			pointer-events none

		&:focus
			&:after
				content ""
				pointer-events none
				position absolute
				top -5px
				right -5px
				bottom -5px
				left -5px
				border 2px solid rgba($theme-color, 0.3)
				border-radius 8px

		&.follow
			color #888
			background linear-gradient(to bottom, #ffffff 0%, #f5f5f5 100%)
			border solid 1px #e2e2e2

			&:hover
				background linear-gradient(to bottom, #f9f9f9 0%, #ececec 100%)
				border-color #dcdcdc

			&:active
				background #ececec
				border-color #dcdcdc

		&.unfollow
			color $theme-color-foreground
			background linear-gradient(to bottom, lighten($theme-color, 25%) 0%, lighten($theme-color, 10%) 100%)
			border solid 1px lighten($theme-color, 15%)

			&:not(:disabled)
				font-weight bold

			&:hover:not(:disabled)
				background linear-gradient(to bottom, lighten($theme-color, 8%) 0%, darken($theme-color, 8%) 100%)
				border-color $theme-color

			&:active:not(:disabled)
				background $theme-color
				border-color $theme-color

		&.wait
			cursor wait !important
			opacity 0.7

</style>