ReactiveChart

ReactiveChart is a generic component to render any chart UI supported by Echarts. Additionally, it supports pre-built charts (pie, bar, line, histogram and scatter) to cover some most common chart use-cases which can be configured using declarative props.

Example uses:

• A histogram chart to display the price distribution in an e-commerce app, range selection can filter the products,
• A custom stacked bar chart to display the distribution of multiple data fields,
• A pie chart to show the language distribution for a book store app, section selection can filter the books.

Usage

Basic Usage

    <ReactiveChart
        // unique id for component
        componentId="language"
        // Chart title
        title="Languages"
        // Query to fetch chart data
        defaultQuery={() => ({
            aggs: {
                years: {
                    terms: {
                        field: 'release_year',
                    },
                },
            },
        })}
        // Define E-chart options
        setOption={({ rawData }) => {
            const buckets = (rawData && rawData.aggregations && rawData.aggregations.years.buckets) || [];
            return ({
                xAxis: {
                    data: buckets.map(bucket => bucket.key),
                },
                yAxis: {},
                series: [
                    {
                        type: 'bar',
                        data: buckets.map(bucket => bucket.doc_count),
                    },
                ],
            });
        }}
    />

Usage With All Props

    <ReactiveChart
        title="Custom Chart"
        componentId="custom_chart"
        useAsFilter={true}
        defaultQuery={() => ({
            aggs: {
                years: {
                    terms: {
                        field: 'release_year',
                    },
                },
            },
        })}
        setOption={({ rawData }) => {
            const buckets = (rawData && rawData.aggregations && rawData.aggregations.years.buckets) || [];
            return ({
                xAxis: {
                    data: buckets.map(bucket => bucket.key),
                },
                yAxis: {},
                series: [
                    {
                        type: 'bar',
                        data: buckets.map(bucket => bucket.doc_count),
                    },
                ],
            });
        }}
        // When useAsFilter is `true` then we have to define customQuery
        customQuery={
            value => (value ? {
						query: {
							term: {
								release_year: value.mainLabel,
							},
						},
                    } : 
            { 
                query: { 
                    match_all: {} 
                } 
            }
        )}         
    />

Props

componentId

unique identifier of the component, can be referenced in other components' react prop.

defaultQuery

takes value and props as parameters and returns the data query to retrieve the chart data, as defined in Elasticsearch Query DSL, which doesn't get leaked to other components. Read more about it here.

setOption

ReactiveChart uses the Echarts library to render the UI. ReactiveChart component connects the search backend to retrieve the chart data. The setOption prop allows you to define the custom chart option support by Echarts to render any kind of chart UI. It accepts the an object containing the following properties:

• aggregationData An array of aggregation buckets
• data An array of search hits
• rawData Search backend data in raw form
• value Current selected value in chart UI

customQuery

Required when useAsFilter is true is a callback function which accepts component's current value as a parameter and returns the data query to be applied to the component, as defined in Elasticsearch Query DSL.

Note: customQuery is called on value changes in the ReactiveChart component as long as the component is a part of react dependency of at least one other component.

endpoint

endpoint prop provides the ability to query a user-defined backend service for this component, overriding the data endpoint configured in the ReactiveBase component. Accepts the following properties:

• url String [Required] URL where the data cluster is hosted.
• headers Object [optional]
  set custom headers to be sent with each server request as key/value pairs.
• method String [optional]
  set method of the API request.
• body Object [optional]
  request body of the API request. When body isn't set and method is POST, the request body is set based on the component's configured props.

• Overrides the endpoint property defined in ReactiveBase.
• If required, use transformResponse prop to transform response in component-consumable format.

dataField

data field to be connected to the component's UI view. The chart data is filtered by a database query on this field. This field is used for doing an aggregation and returns the result.

Note: The dataField property is only required when using pre-built charts.

chartType

Pre-built chart types supported by ReactiveChart. Valid options are: pie, line, bar, histogram, scatter and custom (default).

useAsFilter

If set to false then data selection on chart UI would not filter the results. Defaults to true.

loader

to display an optional loader while fetching the options.

showFilter

show as filter when a value is selected in a global selected filters view. Defaults to true.

filterLabel

An optional label to display for the component in the global selected filters view. This is only applicable if showFilter is enabled. Default value used here is componentId.

URLParams

enable creating a URL query string parameter based on the selected value of the chart. This is useful for sharing URLs with the component state. Defaults to false.

renderError

can be used to render an error message in case of any error.

    renderError={(error) => (
            <div>
                Something went wrong!<br/>Error details<br/>{error}
            </div>
        )
    }

index

The index prop can be used to explicitly specify an index to query against for this component. It is suitable for use-cases where you want to fetch results from more than one index in a single ReactiveSearch API request. The default value for the index is set to the app prop defined in the ReactiveBase component.

Demo

Custom Chart

Pre-Built Chart (Pie)

Extending

ReactiveChart component can be extended to

1. specify how chart data should be filtered or updated using react prop.

react

specify dependent components to reactively update ReactiveChart's options.

• key String one of and, or, not defines the combining clause.
  • and clause implies that the results will be filtered by matches from all of the associated component states.
  • or clause implies that the results will be filtered by matches from at least one of the associated component states.
  • not clause implies that the results will be filtered by an inverse match of the associated component states.
• value String or Array or Object
  • String is used for specifying a single component by its componentId.
  • Array is used for specifying multiple components by their componentId.
  • Object is used for nesting other key clauses.