StaticFilter

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Developer

Example Implementation

static-filter.fn.tsx

import {StaticFilterOptions, buildStaticFilter} from '@coveo/headless';
import {useEffect, useState, FunctionComponent, useContext} from 'react';
import {AppContext} from '../../context/engine';
 
export const StaticFilter: FunctionComponent<StaticFilterOptions> = (props) => {
  const {engine} = useContext(AppContext);
  const controller = buildStaticFilter(engine!, {options: props});
  const [state, setState] = useState(controller.state);
 
  useEffect(() => controller.subscribe(() => setState(controller.state)), []);
 
  return (
    <ul>
      {state.values.map((value) => {
        return (
          <li key={value.caption}>
            <input
              type="checkbox"
              checked={controller.isValueSelected(value)}
              onChange={() => controller.toggleSelect(value)}
            />
            <span>{value.caption}</span>
          </li>
        );
      })}
    </ul>
  );
};
 
/* Usage
 
const youtubeExpression = buildQueryExpression()
  .addStringField({
    field: 'filetype',
    operator: 'isExactly',
    values: ['youtubevideo'],
  })
  .toQuerySyntax();
 
const dropboxExpression = buildQueryExpression()
  .addStringField({
    field: 'connectortype',
    operator: 'isExactly',
    values: ['DropboxCrawler'],
  })
  .addStringField({
    field: 'objecttype',
    operator: 'isExactly',
    values: ['File'],
  })
  .toQuerySyntax();
 
const youtube = buildStaticFilterValue({
  caption: 'Youtube',
  expression: youtubeExpression,
})
const dropbox = buildStaticFilterValue({
  caption: 'Dropbox',
  expression: dropboxExpression,
})
 
<StaticFilter id="fileType" values={[youtube, dropbox]}/>;
*/

The StaticFilter controller manages a collection of filter values.

Methods

deselectAll

Deselects all static filter values.

isValueSelected

Checks whether the specified static filter value is selected.

Parameters

Returns boolean: Whether the specified static filter value is selected.

toggleSelect

Toggles the specified static filter value.

Parameters

toggleSingleSelect

Toggles the specified static filter value, deselecting others.

Parameters

subscribe

Adds a callback that’s invoked on state change.

Parameters

  • listener: () => void

    A callback that’s invoked on state change.

Returns Unsubscribe: A function to remove the listener.

Attributes

state

A state of the StaticFilter controller.

Properties

  • hasActiveValues: boolean

    true if there’s at least one non-idle value and false otherwise.

  • id: string

    The static filter id.

  • values: StaticFilterValue[]

    The static filter values.

Initialize

buildStaticFilter

Creates a Static Filter controller instance.

Parameters

  • engine: SearchEngine

    The headless engine.

  • props: StaticFilterProps

    The configurable Sort controller properties.

Returns StaticFilter

StaticFilterProps

The configurable Sort controller properties.

Properties

StaticFilterOptions

The options for the StaticFilter controller.

Properties

  • id: string

    A unique identifier for the static filter.

  • values: StaticFilterValue[]

    The values the static filter is responsible for managing.

Utils

buildStaticFilterValue

Creates a StaticFilterValue.

Parameters

Returns StaticFilterValue

buildQueryExpression

Creates an QueryExpression instance.

Returns QueryExpression: A utility to help build query expressions.

DateFieldExpression

Properties

  • field: string

    The field name.

  • operator: NumericOperator

    The operator to use when comparing field and value. Options for the operator are: "isExactly" | "lowerThan" | "lowerThanOrEqual" | "greaterThan" | "greaterThanOrEqual".

  • value: string

    The value to match against the field. For absolute dates, please use form YYYY/MM/DD. For relative dates, please refer to the supported date/time operators.

  • negate?: boolean

    If true, the inverse expression will be created.

DateRangeFieldExpression

Properties

  • field: string

    The field name.

  • from: string

    The start of the range. For absolute dates, please use form YYYY/MM/DD. For relative dates, please refer to the supported date/time operators.

  • to: string

    The end of the range. For absolute dates, please use form YYYY/MM/DD. For relative dates, please refer to the supported date/time operators.

  • negate?: boolean

    If true, the inverse expression will be created.

ExactMatchExpression

Properties

  • expression: string

    An expression that must appear in its entirety at least once for an item to be returned.

    For example, specifying Star Wars will only return items containing the exact phrase.

  • negate?: boolean

    If true, the inverse expression will be created.

FieldExistsExpression

Properties

  • field: string

    The field that should be defined on all matching items.

  • negate?: boolean

    If true, the inverse expression will be created.

KeywordExpression

Properties

  • expression: string

    An expression containing terms to match. Terms can be in any order, and may also be expanded with stemming.

    For example, specifying Star Wars will return items containing either Star or Wars or both.

  • negate?: boolean

    If true, the inverse expression will be created.

NearExpression

Properties

  • otherTerms: OtherTerm[]

    The other terms to check against the reference term. See NEAR for an example.

  • startTerm: string

    The reference term.

  • negate?: boolean

    If true, the inverse expression will be created.

NumericFieldExpression

Properties

  • field: string

    The field name.

  • operator: NumericOperator

    The operator to use when comparing field and value.

  • value: number

    The value to match against the field.

  • negate?: boolean

    If true, the inverse expression will be created.

NumericRangeFieldExpression

Properties

  • field: string

    The field name.

  • from: number

    The start of the range.

  • to: number

    The end of the range.

  • negate?: boolean

    If true, the inverse expression will be created.

OtherTerm

Properties

  • endTerm: string

    The term to check against the reference term.

  • maxKeywordsBetween: number

    The maximum number of keywords that should exist between the current term and the reference term.

QueryExpression

Properties

  • addDateField: function

    Adds an expression that uses an operator to compare a date field to a value. Returns all of the items for which the expression evaluates to true.

    Parameters

  • addDateRangeField: function

    Adds an expression that returns all items for which the value of the date field is within the defined range.

    Parameters

  • addExactMatch: function

    Adds an expression that must appear in its entirety, at least once, for an item to be returned.

    Parameters

  • addExpression: function

    Adds a QueryExpression to the current instance.

    Parameters

  • addFieldExists: function

    Adds an expression returning all items where the defined field exists.

    Parameters

  • addKeyword: function

    Adds an expression containing terms to match. Terms can be in any order, and may also be expanded with stemming.

    Parameters

  • addNear: function

    Adds an expression that returns all of the items in which the specified startTerm appears no more than maxKeywordsBetween from the endTerm, for each element in otherTerms.

    Parameters

  • addNumericField: function

    Adds an expression that uses an operator to compare a numeric field to a value. Returns all of the items for which the expression evaluates to true.

    Parameters

  • addNumericRangeField: function

    Adds an expression that returns all items for which the value of the numeric field is within the defined range.

    Parameters

  • addQueryExtension: function

    Adds an expression that invokes a query extension.

    Parameters

  • addStringFacetField: function

    Adds an expression that uses an operator to compare a string facet field to a value. Returns all of the items for which the expression evaluates to true.

    Parameters

  • addStringField: function

    Adds an expression that uses an operator to compare a string field against certain values. Returns all of the items for which the expression evaluates to true.

    Parameters

  • joinUsing: function

    Allows specifying a boolean operator join expressions with. Possible values are and and or.

    Parameters

    • operator: BooleanOperator

      The boolean operator to join individual expressions with.

      Returns QueryExpression: The QueryExpression instance.

  • toQuerySyntax: function

    Joins all expressions using the configured boolean operator.

    Returns string: A string representation of the configured expressions.

QueryExtensionExpression

Properties

  • name: string

    The query extension name without the leading $ sign. See Standard query extensions for examples.

  • parameters: QueryExtensionParameters

    The query extension parameters where applicable.

StaticFilterValue

Properties

  • caption: string

    A human-readable caption for the expression (for example, Youtube).

  • expression: string

    The query filter expression to apply when the value is selected (for example, @filetype=="youtubevideo").

  • state: 'idle' | 'selected'

    The state of the static filter value.

StaticFilterValueOptions

Properties

  • caption: string

    A human-readable caption for the expression (for example, Youtube).

  • expression: string

    The query filter expression to apply when the value is selected (for example, @filetype=="youtubevideo").

  • state?: 'idle' | 'selected'

    The state of the static filter value.

StringFacetFieldExpression

Properties

  • field: string

    The field name.

  • operator: StringFacetFieldOperator

    The operator to use when comparing field and value.

  • value: string

    The value to match against the field.

  • negate?: boolean

    If true, the inverse expression will be created.

StringFieldExpression

Properties

  • field: string

    The field name.

  • operator: StringOperator

    The operator to use when comparing field and values.

  • values: string[]

    The values to match against the field.

  • negate?: boolean

    If true, the inverse expression will be created.

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