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selectors.js
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selectors.js
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/**
* External dependencies
*/
import createSelector from 'rememo';
import { filter, get, includes, map, some, flow, deburr } from 'lodash';
/**
* Given a block name or block type object, returns the corresponding
* normalized block type object.
*
* @param {Object} state Blocks state.
* @param {(string|Object)} nameOrType Block name or type object
*
* @return {Object} Block type object.
*/
const getNormalizedBlockType = ( state, nameOrType ) => (
'string' === typeof nameOrType ?
getBlockType( state, nameOrType ) :
nameOrType
);
/**
* Returns all the available block types.
*
* @param {Object} state Data state.
*
* @return {Array} Block Types.
*/
export const getBlockTypes = createSelector(
( state ) => Object.values( state.blockTypes ),
( state ) => [
state.blockTypes,
]
);
/**
* Returns a block type by name.
*
* @param {Object} state Data state.
* @param {string} name Block type name.
*
* @return {Object?} Block Type.
*/
export function getBlockType( state, name ) {
return state.blockTypes[ name ];
}
/**
* Returns block styles by block name.
*
* @param {Object} state Data state.
* @param {string} name Block type name.
*
* @return {Array?} Block Styles.
*/
export function getBlockStyles( state, name ) {
return state.blockStyles[ name ];
}
/**
* Returns all the available categories.
*
* @param {Object} state Data state.
*
* @return {Array} Categories list.
*/
export function getCategories( state ) {
return state.categories;
}
/**
* Returns the name of the default block name.
*
* @param {Object} state Data state.
*
* @return {string?} Default block name.
*/
export function getDefaultBlockName( state ) {
return state.defaultBlockName;
}
/**
* Returns the name of the block for handling non-block content.
*
* @param {Object} state Data state.
*
* @return {string?} Name of the block for handling non-block content.
*/
export function getFreeformFallbackBlockName( state ) {
return state.freeformFallbackBlockName;
}
/**
* Returns the name of the block for handling unregistered blocks.
*
* @param {Object} state Data state.
*
* @return {string?} Name of the block for handling unregistered blocks.
*/
export function getUnregisteredFallbackBlockName( state ) {
return state.unregisteredFallbackBlockName;
}
/**
* Returns an array with the child blocks of a given block.
*
* @param {Object} state Data state.
* @param {string} blockName Block type name.
*
* @return {Array} Array of child block names.
*/
export const getChildBlockNames = createSelector(
( state, blockName ) => {
return map(
filter( state.blockTypes, ( blockType ) => {
return includes( blockType.parent, blockName );
} ),
( { name } ) => name
);
},
( state ) => [
state.blockTypes,
]
);
/**
* Returns the block support value for a feature, if defined.
*
* @param {Object} state Data state.
* @param {(string|Object)} nameOrType Block name or type object
* @param {string} feature Feature to retrieve
* @param {*} defaultSupports Default value to return if not
* explicitly defined
*
* @return {?*} Block support value
*/
export const getBlockSupport = ( state, nameOrType, feature, defaultSupports ) => {
const blockType = getNormalizedBlockType( state, nameOrType );
return get( blockType, [
'supports',
feature,
], defaultSupports );
};
/**
* Returns true if the block defines support for a feature, or false otherwise.
*
* @param {Object} state Data state.
* @param {(string|Object)} nameOrType Block name or type object.
* @param {string} feature Feature to test.
* @param {boolean} defaultSupports Whether feature is supported by
* default if not explicitly defined.
*
* @return {boolean} Whether block supports feature.
*/
export function hasBlockSupport( state, nameOrType, feature, defaultSupports ) {
return !! getBlockSupport( state, nameOrType, feature, defaultSupports );
}
/**
* Returns true if the block type by the given name or object value matches a
* search term, or false otherwise.
*
* @param {Object} state Blocks state.
* @param {(string|Object)} nameOrType Block name or type object.
* @param {string} searchTerm Search term by which to filter.
*
* @return {Object[]} Wheter block type matches search term.
*/
export function isMatchingSearchTerm( state, nameOrType, searchTerm ) {
const blockType = getNormalizedBlockType( state, nameOrType );
const getNormalizedSearchTerm = flow( [
// Disregard diacritics.
// Input: "média"
deburr,
// Lowercase.
// Input: "MEDIA"
( term ) => term.toLowerCase(),
// Strip leading and trailing whitespace.
// Input: " media "
( term ) => term.trim(),
] );
const normalizedSearchTerm = getNormalizedSearchTerm( searchTerm );
const isSearchMatch = flow( [
getNormalizedSearchTerm,
( normalizedCandidate ) => includes(
normalizedCandidate,
normalizedSearchTerm
),
] );
return (
isSearchMatch( blockType.title ) ||
some( blockType.keywords, isSearchMatch ) ||
isSearchMatch( blockType.category )
);
}
/**
* Returns a boolean indicating if a block has child blocks or not.
*
* @param {Object} state Data state.
* @param {string} blockName Block type name.
*
* @return {boolean} True if a block contains child blocks and false otherwise.
*/
export const hasChildBlocks = ( state, blockName ) => {
return getChildBlockNames( state, blockName ).length > 0;
};
/**
* Returns a boolean indicating if a block has at least one child block with inserter support.
*
* @param {Object} state Data state.
* @param {string} blockName Block type name.
*
* @return {boolean} True if a block contains at least one child blocks with inserter support
* and false otherwise.
*/
export const hasChildBlocksWithInserterSupport = ( state, blockName ) => {
return some( getChildBlockNames( state, blockName ), ( childBlockName ) => {
return hasBlockSupport( state, childBlockName, 'inserter', true );
} );
};