#!/usr/bin/env groovy

/*
Calculate the current version by querying a list of assets in a Nexus Repository. 
Return '0.0.1' if there are no matching assets. 

Jenkins Plugin dependencies:

- HTTP Request
- Plugin Utilty Steps

*/

Map call(Map config = [:]) {
    Map defaults = [
        nexusBase: 'https://repo.thejimnicholson.com',
        searchAPI: 'service/rest/v1/search',
        queryParams: [
          'repository': 'tools',
          'sort': 'name',
          'name': 'tests/test-something*'
        ]
    ]
    Map runConfig = defaults + config

    nexusURL = runConfig.nexusBase + '/' + runConfig.searchAPI
    nexusSearch = buildUrlWithQueryParams(nexusURL, runConfig.queryParams)

    response = httpRequest acceptType: 'APPLICATION_JSON',
      contentType: 'APPLICATION_JSON',
      url: nexusSearch,
      wrapAsMultipart: false
    body = response.content
    assets = readJSON text: body
    latest = assets.items.last()
    runConfig.nexusQuery = nexusSearch
    runConfig.latestVersion = latest.name

    return runConfig
}

def buildUrlWithQueryParams(baseUrl, queryParams) {
    def url = baseUrl
    if (!queryParams.empty) {
        def queryParamsString = queryParams.collect { key, value ->
            "${URLEncoder.encode(key, 'UTF-8')}=${URLEncoder.encode(value, 'UTF-8')}"
        }.join('&')
        url += '?' + queryParamsString
    }
    return url
}