unix-permissions/build/src/functions/min_max.js

Swiss Army knife for Unix permissions

import{excludeKeys}from"filter-obj";

import{variableMap}from"../helpers.js";
import{mapValues}from"../utils.js";



const minMaxMap=(values,nodesMap,nodesMapA)=>{
const mergedNodes={...nodesMap,...nodesMapA};
const nodesMapB=mapValues(mergedNodes,(node,nodeKey)=>
findNode({values,nodesMap,nodesMapA,nodeKey})
);


const nodesMapC=excludeKeys(nodesMapB,isUndefined);
return nodesMapC
};






const findNode=({values,nodesMap,nodesMapA,nodeKey})=>{
const[nodeB]=values.
flatMap((value)=>[
[nodesMap[nodeKey],value],
[nodesMapA[nodeKey],value]]
).
find(hasValue);
return nodeB
};

const hasValue=([{add}={},value])=>add===value;

const isUndefined=(key,value)=>value===undefined;

const MIN_VALUES=[false,undefined,true];
const minMap=minMaxMap.bind(undefined,MIN_VALUES);
export const min=variableMap.bind(undefined,minMap);

const MAX_VALUES=[true,undefined,false];
const maxMap=minMaxMap.bind(undefined,MAX_VALUES);
export const max=variableMap.bind(undefined,maxMap);