18F/cg-dashboard

import React from "react";
import AppStore from "../stores/app_store.js";
import Loading from "./loading.jsx";
import OrgStore from "../stores/org_store.js";
import ServiceBindingStore from "../stores/service_binding_store.js";
import ServiceInstanceList from "./service_instance_list.jsx";
import ServiceInstanceStore from "../stores/service_instance_store.js";
import ServicePlanStore from "../stores/service_plan_store.js";
import SpaceStore from "../stores/space_store.js";
import { spaceHref } from "../util/url";

const propTypes = {};

const defaultProps = {};

function boundReady(instances) {
  return (
    !ServiceInstanceStore.loading &&
    !ServicePlanStore.loading &&
    !ServiceBindingStore.loading &&
    !instances.length
  );
}

function unboundReady(instances) {
  return (
    !ServiceInstanceStore.loading &&
    !ServicePlanStore.loading &&
    !instances.length
  );
}

function stateSetter() {
  const currentOrgGuid = OrgStore.currentOrgGuid;
  const currentSpaceGuid = SpaceStore.currentSpaceGuid;
  const currentSpaceName = SpaceStore.currentSpaceName;
  const currentAppGuid = AppStore.currentAppGuid;

  const appServiceBindings = ServiceBindingStore.getAllByApp(currentAppGuid);
  const allServiceBindings = ServiceBindingStore.getAll();

  const serviceInstances = ServiceInstanceStore.getAllBySpaceGuid(
    currentSpaceGuid
  ).map(serviceInstance => {
    const serviceBindings = [];
    const servicePlan = ServicePlanStore.get(serviceInstance.service_plan_guid);
    const serviceBinding = allServiceBindings.find(
      binding => serviceInstance.guid === binding.service_instance_guid
    );
    if (serviceBinding) serviceBindings.push(serviceBinding);

    return Object.assign({}, serviceInstance, { servicePlan, serviceBindings });
  });

  const boundServiceInstances = serviceInstances.filter(serviceInstance =>
    ServiceInstanceStore.isInstanceBound(serviceInstance, appServiceBindings)
  );

  const unboundServiceInstances = serviceInstances.filter(
    serviceInstance =>
      !ServiceInstanceStore.isInstanceBound(serviceInstance, appServiceBindings)
  );

  const loading =
    ServiceInstanceStore.loading ||
    ServicePlanStore.loading ||
    ServiceBindingStore.loading;

  return {
    currentAppGuid,
    currentSpaceGuid,
    currentOrgGuid,
    currentSpaceName,
    boundServiceInstances,
    unboundServiceInstances,
    loading
  };
}

export default class ServiceInstancePanel extends React.Component {
  constructor(props) {
    super(props);
    this.state = stateSetter();

    this.handleChange = this.handleChange.bind(this);
  }

  componentDidMount() {
    ServiceInstanceStore.addChangeListener(this.handleChange);
    ServiceBindingStore.addChangeListener(this.handleChange);
    ServicePlanStore.addChangeListener(this.handleChange);
  }

  componentWillUnmount() {
    ServiceInstanceStore.removeChangeListener(this.handleChange);
    ServiceBindingStore.removeChangeListener(this.handleChange);
    ServicePlanStore.removeChangeListener(this.handleChange);
  }

  handleChange() {
    this.setState(stateSetter());
  }

  get spaceLink() {
    return (
      <a
        href={spaceHref(this.state.currentOrgGuid, this.state.currentSpaceGuid)}
      >
        {this.state.currentSpaceName}
      </a>
    );
  }

  render() {
    const loading = <Loading text="Loading services" />;
    let content = <div>{loading}</div>;

    if (!this.state.loading) {
      content = (
        <div>
          <ServiceInstanceList
            currentAppGuid={this.state.currentAppGuid}
            serviceInstances={this.state.boundServiceInstances}
            bound
            empty={boundReady(this.state.boundServiceInstances)}
            titleElement={<span>Bound service instances</span>}
          />
          <ServiceInstanceList
            currentAppGuid={this.state.currentAppGuid}
            serviceInstances={this.state.unboundServiceInstances}
            empty={unboundReady(this.state.unboundServiceInstances)}
            titleElement={
              <span>Service instances available in {this.spaceLink}</span>
            }
          />
        </div>
      );
    }

    return content;
  }
}

ServiceInstancePanel.propTypes = propTypes;
ServiceInstancePanel.defaultProps = defaultProps;