package com.xcong.excoin.modules.newPrice.utils;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import java.text.DecimalFormat;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.Map;
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public final class UrlBuilder {
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private static final int MAX_DECIMAL_DIGITS = 30;
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private static DecimalFormat df;
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private UrlBuilder() {
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}
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public static String buildFullUrl(String baseUrl, String urlPath, LinkedHashMap<String, Object> parameters, String signature) {
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if (parameters != null && !parameters.isEmpty()) {
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StringBuilder sb = new StringBuilder(baseUrl);
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sb.append(urlPath).append('?');
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joinQueryParameters(sb, parameters);
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if (null != signature) {
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sb.append("&signature=").append(signature);
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}
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return sb.toString();
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} else {
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return baseUrl + urlPath;
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}
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}
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public static String buildStreamUrl(String baseUrl, ArrayList<String> streams) {
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StringBuilder sb = new StringBuilder(baseUrl);
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sb.append("?streams=");
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return joinStreamUrls(sb, streams);
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}
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//concatenate query parameters
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public static String joinQueryParameters(LinkedHashMap<String, Object> parameters) {
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return joinQueryParameters(new StringBuilder(), parameters).toString();
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}
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public static StringBuilder joinQueryParameters(StringBuilder urlPath, LinkedHashMap<String, Object> parameters) {
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if (parameters == null || parameters.isEmpty()) {
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return urlPath;
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}
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boolean isFirst = true;
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for (Map.Entry<String, Object> mapElement : parameters.entrySet()) {
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if (mapElement.getValue() instanceof Double) {
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parameters.replace(mapElement.getKey(), getFormatter().format(mapElement.getValue()));
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} else if (mapElement.getValue() instanceof ArrayList) {
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if (((ArrayList<?>) mapElement.getValue()).isEmpty()) {
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continue;
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}
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String key = mapElement.getKey();
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joinArrayListParameters(key, urlPath, (ArrayList<?>) mapElement.getValue(), isFirst);
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isFirst = false;
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continue;
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}
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if (isFirst) {
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isFirst = false;
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} else {
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urlPath.append('&');
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}
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urlPath.append(mapElement.getKey())
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.append('=')
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.append(urlEncode(mapElement.getValue().toString()));
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}
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return urlPath;
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}
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private static void joinArrayListParameters(String key, StringBuilder urlPath, ArrayList<?> values, boolean isFirst) {
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for (Object value: values) {
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if (isFirst) {
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isFirst = false;
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} else {
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urlPath.append('&');
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}
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urlPath.append(key)
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.append('=')
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.append(urlEncode(value.toString()));
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}
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}
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private static String joinStreamUrls(StringBuilder urlPath, ArrayList<String> streams) {
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boolean isFirst = true;
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for (String stream: streams) {
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if (isFirst) {
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isFirst = false;
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} else {
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urlPath.append('/');
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}
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urlPath.append(stream);
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}
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return urlPath.toString();
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}
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public static String urlEncode(String s) {
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try {
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return URLEncoder.encode(s, StandardCharsets.UTF_8.name());
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} catch (UnsupportedEncodingException e) {
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// UTF-8 being unsuppored is unlikely
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// Replace with a unchecked exception to tidy up exception handling
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throw new RuntimeException(StandardCharsets.UTF_8.name() + " is unsupported", e);
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}
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}
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private static DecimalFormat getFormatter() {
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if (null == df) {
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df = new DecimalFormat();
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df.setMaximumFractionDigits(MAX_DECIMAL_DIGITS);
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df.setGroupingUsed(false);
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}
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return df;
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}
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public static String buildTimestamp() {
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return String.valueOf(System.currentTimeMillis());
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}
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}
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