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  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  Cloudera, Inc. licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

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<template>
  <VariableSubstitution
    v-if="initialVariables"
    :locations="locations"
    :initial-variables="initialVariables"
    @variables-changed="onVariablesChanged"
  />
</template>

<script lang="ts">
  import { defineComponent, PropType, ref } from 'vue';

  import { Variable } from './types';
  import VariableSubstitution from './VariableSubstitution.vue';
  import SubscriptionTracker from '../../../../components/utils/SubscriptionTracker';
  import { IdentifierLocation } from '../../../../parse/types';
  import { POST_FROM_LOCATION_WORKER_EVENT } from '../../../../sql/workers/events';
  import { wrap } from '../../../../vue/webComponentWrap';

  const VariableSubstitutionKoBridge = defineComponent({
    name: 'VariableSubstitutionKoBridge',
    components: {
      VariableSubstitution
    },
    props: {
      initialVariables: {
        type: Object as PropType<Variable[]>,
        default: undefined
      }
    },
    setup() {
      const subTracker = new SubscriptionTracker();

      const locations = ref<IdentifierLocation[]>([]);

      subTracker.subscribe(
        POST_FROM_LOCATION_WORKER_EVENT,
        (e: { data?: { locations?: IdentifierLocation[] } }) => {
          if (e.data && e.data.locations) {
            locations.value = e.data.locations;
          }
        }
      );

      return { locations };
    },
    methods: {
      onVariablesChanged(variables: Variable[]): void {
        this.$el.dispatchEvent(
          new CustomEvent<Variable[]>('variables-changed', { bubbles: true, detail: variables })
        );
      }
    }
  });

  export const COMPONENT_NAME = 'variable-substitution-ko-bridge';
  wrap(COMPONENT_NAME, VariableSubstitutionKoBridge);

  export default VariableSubstitutionKoBridge;
</script>
