Current File : //www/specpages-backup/node_modules/moize/src/serialize.ts
import type { Key, Moizeable, Options } from '../index.d';
/**
* @function getCutoff
*
* @description
* faster `Array.prototype.indexOf` implementation build for slicing / splicing
*
* @param array the array to match the value in
* @param value the value to match
* @returns the matching index, or -1
*/
function getCutoff(array: any[], value: any) {
const { length } = array;
for (let index = 0; index < length; ++index) {
if (array[index] === value) {
return index + 1;
}
}
return 0;
}
/**
* @private
*
* @description
* custom replacer for the stringify function
*
* @returns if function then toString of it, else the value itself
*/
export function createDefaultReplacer() {
const cache: any[] = [];
const keys: string[] = [];
return function defaultReplacer(key: string, value: any) {
const type = typeof value;
if (type === 'function' || type === 'symbol') {
return value.toString();
}
if (typeof value === 'object') {
if (cache.length) {
const thisCutoff = getCutoff(cache, this);
if (thisCutoff === 0) {
cache[cache.length] = this;
} else {
cache.splice(thisCutoff);
keys.splice(thisCutoff);
}
keys[keys.length] = key;
const valueCutoff = getCutoff(cache, value);
if (valueCutoff !== 0) {
return `[ref=${
keys.slice(0, valueCutoff).join('.') || '.'
}]`;
}
} else {
cache[0] = value;
keys[0] = key;
}
return value;
}
return '' + value;
};
}
/**
* @private
*
* @description
* get the stringified version of the argument passed
*
* @param arg argument to stringify
* @returns the stringified argument
*/
export function getStringifiedArgument<Type>(arg: Type) {
const typeOfArg = typeof arg;
return arg && (typeOfArg === 'object' || typeOfArg === 'function')
? JSON.stringify(arg, createDefaultReplacer())
: arg;
}
/**
* @private
*
* @description
* serialize the arguments passed
*
* @param options the options passed to the moizer
* @param options.maxArgs the cap on the number of arguments used in serialization
* @returns argument serialization method
*/
export function defaultArgumentSerializer(args: Key) {
let key = '|';
for (let index = 0; index < args.length; index++) {
key += getStringifiedArgument(args[index]) + '|';
}
return [key];
}
/**
* @private
*
* @description
* based on the options passed, either use the serializer passed or generate the internal one
*
* @param options the options passed to the moized function
* @returns the function to use in serializing the arguments
*/
export function getSerializerFunction<MoizeableFn extends Moizeable>(
options: Options<MoizeableFn>
) {
return typeof options.serializer === 'function'
? options.serializer
: defaultArgumentSerializer;
}
/**
* @private
*
* @description
* are the serialized keys equal to one another
*
* @param cacheKey the cache key to compare
* @param key the key to test
* @returns are the keys equal
*/
export function getIsSerializedKeyEqual(cacheKey: Key, key: Key) {
return cacheKey[0] === key[0];
}
Mini Shell