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Karibu-DSL, Kotlin extensions/DSL for Vaadin

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package com.github.mvysny.karibudsl.v8

import java.net.URI
import java.util.*

public fun Iterable.filterNotBlank(): List = filterNotNull().filter { it.isNotBlank() }

/**
 * Parses the [URI.query] string and returns a map of all query parameters. Since a key may be present multiple times in the query,
 * the map maps key to a list of values. The order of the values follows the order in which the values were present in the query.
 *
 * To retrieve the query map from Vaadin, just use `Page.getCurrent().location.queryMap`.
 */
public val URI.queryMap: Map>
    get() {
        val keyValueList: List> = (query ?: "")
                .split('&')
                .filterNotBlank()
                .map { it.trim().split('=', limit = 2) }
                .filter { it.size == 2 }
                .map { it[0] to it[1] }

        val result = mutableMapOf>()
        for (pair in keyValueList) {
            result.computeIfAbsent(pair.first) { LinkedList() }.add(pair.second)
        }
        return result
    }

public fun String.containsWhitespace(): Boolean = any { it.isWhitespace() }

private val messages = mapOf("cantConvertToInteger" to "Can't convert to integer",
        "cantConvertToDecimal" to "Can't convert to decimal number",
        "set" to "Set",
        "clear" to "Clear",
        "all" to "All"
)
/**
 * Change this function to provide a proper i18n for your apps. For a list of all keys used by Karibu-DSL see [messages].
 */
public var karibuDslI18n: (key: String) -> String = { key -> messages[key] ?: key }