snuyanzin commented on code in PR #17830: URL: https://github.com/apache/flink/pull/17830#discussion_r1035036249
########## flink-table/flink-sql-client/src/main/java/org/apache/flink/table/client/cli/PromptHandler.java: ########## @@ -0,0 +1,188 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.flink.table.client.cli; + +import org.apache.flink.table.client.config.SqlClientOptions; +import org.apache.flink.table.client.gateway.Executor; +import org.apache.flink.table.utils.ThreadLocalCache; + +import org.jline.terminal.Terminal; +import org.jline.utils.AttributedStringBuilder; +import org.jline.utils.AttributedStyle; +import org.jline.utils.StyleResolver; + +import java.text.SimpleDateFormat; +import java.util.Collections; +import java.util.Date; +import java.util.HashMap; +import java.util.Locale; +import java.util.Map; +import java.util.function.Supplier; + +/** + * Prompt handler class which allows customization for the prompt shown at the start (left prompt) + * and the end (right prompt) of each line. + */ +public class PromptHandler { + private static final char ESCAPE_BACKSLASH = '\\'; + private static final Map<Character, String> DATE_TIME_FORMATS; + private static final ThreadLocalCache<String, SimpleDateFormat> FORMATTER_CACHE = + new ThreadLocalCache<String, SimpleDateFormat>() { + @Override + public SimpleDateFormat getNewInstance(String key) { + return new SimpleDateFormat(key, Locale.ROOT); + } + }; + + static { + Map<Character, String> map = new HashMap<>(); + map.put('D', "yyyy-MM-dd HH:mm:ss.SSS"); + map.put('m', "mm"); + map.put('o', "MM"); + map.put('O', "MMM"); + map.put('P', "aa"); + map.put('r', "hh:mm"); + map.put('R', "HH:mm"); + map.put('s', "ss"); + map.put('w', "d"); + map.put('W', "E"); + map.put('y', "YY"); + map.put('Y', "YYYY"); + DATE_TIME_FORMATS = Collections.unmodifiableMap(map); + } + + private static final StyleResolver STYLE_RESOLVER = new StyleResolver(s -> ""); + + private final String sessionId; + private final Executor executor; + private final Supplier<Terminal> terminalSupplier; + + public PromptHandler(String sessionId, Executor executor, Supplier<Terminal> terminalSupplier) { + this.sessionId = sessionId; + this.executor = executor; + this.terminalSupplier = terminalSupplier; + } + + public String getPrompt() { + return buildPrompt( + executor.getSessionConfig(sessionId).get(SqlClientOptions.PROMPT), + SqlClientOptions.PROMPT.defaultValue()); + } + + public String getRightPrompt() { + return buildPrompt( + executor.getSessionConfig(sessionId).get(SqlClientOptions.RIGHT_PROMPT), + SqlClientOptions.RIGHT_PROMPT.defaultValue()); + } + + private String buildPrompt(String pattern, String defaultValue) { + AttributedStringBuilder promptStringBuilder = new AttributedStringBuilder(); + try { + for (int i = 0; i < pattern.length(); i++) { + final char c = pattern.charAt(i); + if (c == ESCAPE_BACKSLASH) { + if (i == pattern.length() - 1) { + continue; + } + final char nextChar = pattern.charAt(i + 1); + switch (nextChar) { + case 'D': + case 'm': + case 'o': + case 'O': + case 'P': + case 'r': + case 'R': + case 's': + case 'w': + case 'W': + case 'y': + case 'Y': + promptStringBuilder.append( Review Comment: this will be applied for letters with leading `\` i.e. to have catalog it should be `\c`. To have `default_catalogdefault_database` it should be `\c\d`. However it is also possible to put something between e.g.`\c:\d` or `\c_\d` and etc. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
