<script>
import { GlLoadingIcon } from '@gitlab-org/gitlab-ui';
/* eslint-disable vue/require-default-prop */
/* This is a re-usable vue component for rendering a button
    that will probably be sending off ajax requests and need
    to show the loading status by setting the `loading` option.
    This can also be used for initial page load when you don't
    know the action of the button yet by setting
    `loading: true, label: undefined`.

    Sample configuration:

    <loading-button
      :loading="true"
      :label="Hello"
      @click="..."
    />

  */

export default {
  components: {
    GlLoadingIcon,
  },
  props: {
    loading: {
      type: Boolean,
      required: false,
      default: false,
    },
    disabled: {
      type: Boolean,
      required: false,
      default: false,
    },
    label: {
      type: String,
      required: false,
    },
    containerClass: {
      type: [String, Array, Object],
      required: false,
      default: 'btn btn-align-content',
    },
  },
  methods: {
    onClick(e) {
      this.$emit('click', e);
    },
  },
};
</script>

<template>
  <button
    :class="containerClass"
    :disabled="loading || disabled"
    type="button"
    @click="onClick"
  >
    <transition name="fade">
      <gl-loading-icon
        v-if="loading"
        :inline="true"
        :class="{
          'append-right-5': label
        }"
        class="js-loading-button-icon"
      />
    </transition>
    <transition name="fade">
      <slot>
        <span
          v-if="label"
          class="js-loading-button-label"
        >
          {{ label }}
        </span>
      </slot>
    </transition>
  </button>
</template>
