yakworks.spring.params.QueryParamsUtil.groovy Maven / Gradle / Ivy

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/*
* Copyright 2024 Yak.Works - Licensed under the Apache License, Version 2.0 (the "License")
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
*/
package yakworks.spring.params

import java.nio.charset.StandardCharsets

import groovy.transform.CompileStatic
import groovy.util.logging.Slf4j

import org.springframework.util.MultiValueMap
import org.springframework.web.util.UriComponentsBuilder

@CompileStatic
@Slf4j
class QueryParamsUtil {

    /**
     * Parses name=xyz&size=123 query string into a map
     * Uses springs UriComponentsBuilder
     * @param queryString the query params string to parse
     * @return Map the map version of the parsed string
     */
    static Map parseQueryString(String queryString) {
        if(!queryString) return [:]
        MultiValueMap queryParams = UriComponentsBuilder.fromUriString('?'+queryString).build().getQueryParams()
        return toArrayMap(queryParams)
    }

    // private static Map toSingleValueMap(Map paramsMap) {
    //     Map svMap = [:] as Map
    //     //just gets first value
    //     paramsMap.each { k,v ->
    //         svMap[k] = v[0]
    //     }
    //     return svMap;
    // }

    // convert to what stock request.getParameterMap would return. decode each value
    private static Map toArrayMap(MultiValueMap mvMap) {
        Map decodedMap = [:] as Map
        //decode each one now
        mvMap.each { String k, List v ->
            List decodedVals = v ? v.collect{ decode(it) }  : []
            decodedMap[decode(k)] = decodedVals as String[]
        }
        return decodedMap
    }

    static String decode(String s) {
        if(!s) return ""
        URLDecoder.decode(s, StandardCharsets.UTF_8)
    }

    static String encode(String s) {
        if(!s) return ""
        URLEncoder.encode(s, StandardCharsets.UTF_8)
    }
}