TreeList image

TreeList creates a selection based hierarchical tree UI component that is connected to multiple database fields. It can support single as well as multiple item selections.

Example uses:

  • select category/ subcategory items from a list of categories in an e-commerce website.

Usage

Basic Usage

Copy 
    <TreeList 
        componentId="treeListSensor" 
        dataField={['class.keyword', 'subClass.keyword']} 
        title="Products" 
    />

Usage With All Props

Copy 
    <TreeList
        title="TreeList Component"
        loader={<h3>loading...⏰</h3>}
        renderNoResults={() => <b>Oops! Nothing found!</b>}
        componentId="treeListSensor"
        showCount
        // showRadio // use with mode="single"
        showCheckbox
        mode="multiple"
        dataField={['class.keyword', 'subClass.keyword']}
        showSwitcherIcon
        switcherIcon={bool =>
            {
                return bool ? <span> &#8592;</span> : <span> &#8598;</span>;
            }
        }
        showIcon
        showLeafIcon
        icon={
            <span role="img" aria-label="folder-icon">
                🦷
            </span>
        }
        leafIcon={
            <span role="img" aria-label="leaf-icon">
                ☘️
            </span>
        }
        showLine
        showSearch
        // renderItem={(label, count, isSelected) => (
        // 	<span style={isSelected ? { background: 'green' } : {}}>
        // 		{label} - {count}
        // 	</span>
        // )}	
        // render={(propData) => {
        // 	const {
        // 		/* eslint-disable no-unused-vars */
        // 		data,
        // 		rawData,
        // 		error,
        // 		handleClick,
        // 		value,
        // 		loading,
        // 	} = propData;
        // 	return this.renderLists(data, '', true, value, handleClick);
        // }}
        endpoint={{
            url:"https://appbase-demo-ansible-abxiydt-arc.searchbase.io/recipes-demo/_reactivesearch.v3", //mandatory
            headers:{
                // relevant headers
            },
            method: 'POST'
        }}        
    />

Usage as a controlled component

Copy 
function Index(props) {
	const [values, setValues] = useState([
  "FURNITURE SO > SO CHAIR &RECLIN",
  "FURNITURE SO > SO DINING ROOM"
]);
    return (
        <TreeList
            componentId="treeListSensor"
            dataField={['class.keyword', 'subclass.keyword']}
            size={100}
            value={values}
            onChange={(values)=>{
                setValues(values);
            }}
        />
    );
}

Props

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

  • endpoint Object [optional] endpoint prop provides the ability to query a user-defined backend service for this component, overriding the data endpoint configured in the ReactiveBase component. Works only when enableAppbase is true. 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 String Array data field to be connected to the component's UI view. This field is used for doing an aggregation and returns the result. dataField aray must have values in order, i.e, category > sub-cateogry and so-on.

  • title String or JSX [optional] title of the component to be shown in the UI. Defaults to no title being shown.

  • loader String or JSX [optional] to display an optional loader while fetching the options.

  • aggregationSize To set the number of buckets to be returned by aggregations.

    Note: This prop is only applicable when enableAppbase is set to true.

  • sortBy String [optional] sort the list items by one of count, asc, or desc. Defaults to count, which sorts the list by the frequency of count value, most first.

  • defaultValue String Array [optional] select one or more options from the list on mount. Accepts an Array object containing the items that should be selected.

  • value String Array [optional] controls the current value of the component. It selects the item from the list (on mount and on update). Use this prop in conjunction with onChange function.

  • queryFormat String [optional] queries the selected items from the list in one of two modes: or, and.

    • Defaults to or which queries for results where any of the selected list items are present.
    • In and mode, the applied query filters results where all of the selected items are present.

  • mode String [optional] supports two modes, multiple and single. When set to single, only one selection from the hierarchy is allowed. Defaults to multiple.

  • showCheckbox Boolean [optional] show checkbox icon for each list item. Defaults to false.Use this prop in conjunction with mode prop set to multiple.

  • showRadio Boolean [optional] show radio icon for each list item. Defaults to false.Use this prop in conjunction with mode prop set to single.

  • showCount Boolean [optional] show a count of the number of occurences besides each list item. Defaults to true.

  • showIcon Boolean [optional] show icon for non-leaf hierarchy items. Defaults to false.

  • icon JSX [optional] custom icon for non-leaf hierarchy items.

    Copy 
        icon={
        <span role="img" aria-label="folder-icon">
        	🦷
        </span>
    }

  • showLeafIcon Boolean [optional] show icon for leaf hierarchy items. Defaults to false.

  • leafIcon JSX [optional] custom icon for leaf hierarchy items.

    Copy 
        icon={
        <span role="img" aria-label="leaf-icon">
        	🥬
        </span>
    }

  • showSwitcherIcon Boolean [optional] show switcher icon for TreeList.

  • switcherIcon Function [optional] custom switcher icon for TreeList. It takes an boolean argument to depict expanded/ collapsed list item.

    Copy 
        switcherIcon={isExpanded => (isExpanded ? <span> ⤵</span> : <span> →</span>)}

  • showSearch Boolean [optional] whether to show a searchbox to filter the list items locally. Defaults to true.

  • placeholder String [optional] placeholder to be displayed in the searchbox, only applicable when the showSearch prop is set to true. When applicable, the default placeholder value is set to "Search".

  • showFilter Boolean [optional] show as filter when a value is selected in a global selected filters view. Defaults to true.

  • filterLabel String [optional] 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 Boolean [optional] enable creating a URL query string parameter based on the selected value of the list. This is useful for sharing URLs with the component state. Defaults to false.

  • renderItem Function [optional] customize the rendered list itemss via a function which receives the item label, count & isSelected and expects a JSX or String back. For example:

    Copy 
     renderItem={(label, count, isSelected) => (
 	<span style={isSelected ? { background: 'green' } : {}}>
 		{label} - {count}
 	</span>
 )}

  • render Function [optional] an alternative callback function to renderItem, where user can define how to render the view based on all the data changes.
    It accepts an object with these properties:

    • loading: boolean indicates that the query is still in progress
    • error: object An object containing the error info
    • data: array An array of results obtained from the applied query and transformed into component consumable format.
    • rawData object An object of raw response as-is from elasticsearch query.
    • value: array current selected values.
    • handleClick: function A callback function can be used to mark the list value as selected. Accepts the list item label and parent-path of the current item, eg, in "Tree > Branch > Leaf" the parent-path of 'Leaf' would be 'Tree.Branch'.
Copy 

    const recLookup = (obj, path) => {
        try {
            const parts = path.split('.');
            if (parts.length === 1) {
                return obj[parts[0]];
            }
            return recLookup(obj[parts[0]], parts.slice(1).join('.'));
        } catch (e) {
            return false;
        }
    };

	function renderListItems(listItem, parentPath, selectedValues, handleListItemClick) {
		if (!(listItem instanceof Object) || Object.keys(listItem).length === 0) {
			return null;
		}
		const listItemLabel = listItem.key;
		const listItemCount = listItem.count;
		const isLeafNode = !(Array.isArray(listItem.list) && listItem.list.length > 0);

		let newParentPath = listItemLabel;
		if (parentPath) {
			newParentPath = `${parentPath}.${listItemLabel}`;
		}
		const isSelected = recLookup(selectedValues, newParentPath);

		return (
			<li key={newParentPath}>
				{/* eslint-disable jsx-a11y/click-events-have-key-events */}
				{/* eslint-disable jsx-a11y/no-static-element-interactions */}
				<span
					style={isSelected ? { background: 'green', margin: '5px 0' } : {}}
					onClick={() => handleListItemClick(listItemLabel, parentPath, isLeafNode)}
				>
					<React.Fragment>
						<span>{listItemLabel}</span>

						<span>{listItemCount}</span>
					</React.Fragment>
				</span>
				{isLeafNode === false && (
					<div className="--list-child">
						{/* eslint-disable-next-line no-use-before-define */}
						{renderLists(
							listItem.list,
							newParentPath,
							isSelected,
							selectedValues,
							handleListItemClick,
						)}
					</div>
				)}
			</li>
		);
	}

	function renderLists(
            transformedData, 
            parentPath, 
            isExpanded, 
            selectedValues, 
            handleClick
        ) {
            return (
                <ul style={isExpanded ? { fontWeight: 600 } : {}}>
                    {transformedData.map(listItem =>
                        renderListItems(
                            listItem,
                            parentPath,
                            selectedValues,
                            handleClick
                        ),
                    )}
                </ul>
            );      
        }

<TreeList
    //... other props as applicable
	render={(propData) => {
		const {
			/* eslint-disable no-unused-vars */
			data,
			rawData,
			error,
			handleClick,
			value,
			loading,
		} = propData;
		return renderLists(data, '', true, vhandleClick); // renderLists is your list rendering function
	}}
/>

Or you can also use render function as children

Copy 
<TreeList>
    {
        ({
            data,
            rawData,
            error,
            handleClick,
            value,
            loading
        }) => (
            // return UI to be rendered
        )
    }
</TreeList>

  • renderError String or JSX or Function [optional] can be used to render an error message in case of any error.

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

  • renderNoResults Function [optional] can be used to render a message in case of no list items.

    Copy 
    renderNoResults={() => <p>No Results Found!</p>}

  • onChange function [optional] is a callback function which accepts component's current value as a parameter. It is called when you are using the value props and the component's value changes. This prop is used to implement the controlled component behavior.

  • onError Function [optional] gets triggered in case of an error and provides the error object, which can be used for debugging or giving feedback to the user if needed.

  • index String [optional] 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.

    Note: This only works when enableAppbase prop is set to true in ReactiveBase.

Demo


Styles

TreeList component supports innerClass prop with the following keys:

  • title
  • input
  • checkbox
  • radio
  • label
  • count

Read more about it here.

Extending

TreeList component can be extended to

  1. customize the look and feel with className, style,
  2. update the underlying DB query with customQuery, defaultQuery,
  3. connect with external interfaces using beforeValueChange, onValueChange and onQueryChange,
  4. specify how options should be filtered or updated using react prop.
Copy 
<TreeList
  // ...
  className="custom-class"
  style={{"paddingBottom": "10px"}}
  customQuery={
    function(value, props) {
      return {
        query: {
            match: {
                data_field: ["this is a test"]
            }
        }
      }
    }
  }
  defaultQuery={
    function(value, props) {
      return {
          timeout: "1s"
      }
    }
  }
  beforeValueChange={
    function(value) {
      // called before the value is set
      // returns a promise
      return new Promise((resolve, reject) => {
        // update state or component props
        resolve()
        // or reject()
      })
    }
  }
  onValueChange={
    function(value) {
      console.log("current value: ", value)
      // set the state
      // use the value with other js code
    }
  }
  onQueryChange={
    function(prevQuery, nextQuery) {
      // use the query with other js code
      console.log('prevQuery', prevQuery);
      console.log('nextQuery', nextQuery);
    }
  }
  // specify how and which options are filtered using `react` prop.
  react={
    "and": ["pricingFilter", "dateFilter"],
    "or": ["searchFilter"]
  }
/>

  • className String CSS class to be injected on the component container.

  • style Object CSS styles to be applied to the TreeList component.

  • customQuery Function takes value and props as parameters 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 TreeList component as long as the component is a part of react dependency of at least one other component. Note: When extending with customQuery, the queryFormat prop has no affect.

  • defaultQuery Function takes value and props as parameters and returns the data query to be applied to the source component, as defined in Elasticsearch Query DSL, which doesn't get leaked to other components. Read more about it here.

  • beforeValueChange Function is a callback function which accepts component's future value as a parameter and returns a promise. It is called every time before a component's value changes. The promise, if and when resolved, triggers the execution of the component's query and if rejected, kills the query execution. This method can act as a gatekeeper for query execution, since it only executes the query after the provided promise has been resolved.

    Note:

    If you're using Reactivesearch version >= 3.3.7, beforeValueChange can also be defined as a synchronous function. value is updated by default, unless you throw an Error to reject the update. For example:

    Copy 
    beforeValueChange = values => {
    // The update is accepted by default
	if (values.includes('Dirk Pitt')) {
		// To reject the update, throw an error
		throw Error('Selected values should not include Dirk Pitt.');
	}
};

  • onValueChange Function is a callback function which accepts component's current value as a parameter. It is called everytime the component's value changes. This prop is handy in cases where you want to generate a side-effect on value selection. For example: You want to show a pop-up modal with an applicable discount coupon code when list item(s) is/are selected in a "E-commerce Product" TreeList.

  • onQueryChange Function is a callback function which accepts component's prevQuery and nextQuery as parameters. It is called everytime the component's query changes. This prop is handy in cases where you want to generate a side-effect whenever the component's query would change.

  • react Object specify dependent components to reactively update TreeList'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.

Examples

TreeList with default props