#3 change sessions impl

LICENSE.txt

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
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+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
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+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
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+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
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+      origin of the Work and reproducing the content of the NOTICE file.
+
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+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      whether in tort (including negligence), contract, or otherwise,
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+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright (c) 2021 Ruslan Penkrat <penkrat@gmail.com>
+
+   Licensed 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
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pom.xml

@@ -1,70 +1,89 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-	<modelVersion>4.0.0</modelVersion>
+    <modelVersion>4.0.0</modelVersion>
 
-	<packaging>pom</packaging>
+    <packaging>pom</packaging>
 
-	<groupId>ru.penkrat.stbf</groupId>
+    <groupId>ru.penkrat.stbf</groupId>
-	<artifactId>stbf-parent</artifactId>
+    <artifactId>stbf-parent</artifactId>
-	<version>0.0.1-SNAPSHOT</version>
+    <version>0.0.2-SNAPSHOT</version>
-	<name>stbf-parent</name>
+    <name>stbf-parent</name>
 
-	<description>Simple Telegram Bot Facade</description>
+    <description>Simple Telegram Bot Facade</description>
-	<properties>
-		<java.version>1.8</java.version>
-		<lombok.version>1.18.6</lombok.version>
-		<slf4j.version>1.7.25</slf4j.version>
-	</properties>
 
-	<modules>
+    <scm>
-		<module>stbf-api</module>
+        <connection>scm:git:https://git.penkrat.ru/ruslan/stbf.git</connection>
-		<module>stbf-pengrad</module>
+        <developerConnection>scm:git:https://git.penkrat.ru/ruslan/stbf.git</developerConnection>
-		<module>stbf-test</module>
+      <tag>HEAD</tag>
-		<module>stbf-common</module>
+  </scm>
-		<module>stbf-rubenlagus</module>
-	<module>stbf-templates</module>
-  <module>stbf-demo</module>
-  </modules>
 
-	<dependencies>
+    <licenses>
-		<dependency>
+        <license>
-			<groupId>org.slf4j</groupId>
+            <name>Apache License, Version 2.0</name>
-			<artifactId>slf4j-api</artifactId>
+            <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
-			<version>${slf4j.version}</version>
+        </license>
-			<scope>compile</scope>
+    </licenses>
-		</dependency>
-		<dependency>
-			<groupId>org.projectlombok</groupId>
-			<artifactId>lombok</artifactId>
-			<version>${lombok.version}</version>
-			<optional>true</optional>
-		</dependency>
-	</dependencies>
 
-	<build>
+    <properties>
-		<plugins>
+        <java.version>1.8</java.version>
-			<plugin>
+        <lombok.version>1.18.6</lombok.version>
-				<groupId>org.apache.maven.plugins</groupId>
+        <slf4j.version>1.7.25</slf4j.version>
-				<artifactId>maven-compiler-plugin</artifactId>
+    </properties>
-				<configuration>
-					<source>${java.version}</source>
-					<target>${java.version}</target>
-				</configuration>
-			</plugin>
-		</plugins>
-	</build>
 
-	<distributionManagement>
+    <modules>
-		<repository>
+        <module>stbf-api</module>
-			<id>${deployment.releases.id}</id>
+        <module>stbf-pengrad</module>
-			<name>Releases</name>
+        <module>stbf-test</module>
-			<url>${deployment.releases.url}</url>
+        <module>stbf-common</module>
-		</repository>
+        <module>stbf-rubenlagus</module>
-		<snapshotRepository>
+        <module>stbf-templates</module>
-			<id>${deployment.snapshots.id}</id>
+        <module>stbf-demo</module>
-			<name>Snapshots</name>
+    </modules>
-			<url>${deployment.snapshots.url}</url>
+
-		</snapshotRepository>
+    <dependencies>
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-api</artifactId>
+            <version>${slf4j.version}</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-release-plugin</artifactId>
+                <version>3.0.0-M4</version>
+            </plugin>
+        </plugins>
+    </build>
+
+    <distributionManagement>
+        <repository>
+            <id>${deployment.releases.id}</id>
+            <name>Releases</name>
+            <url>${deployment.releases.url}</url>
+        </repository>
+        <snapshotRepository>
+            <id>${deployment.snapshots.id}</id>
+            <name>Snapshots</name>
+            <url>${deployment.snapshots.url}</url>
+        </snapshotRepository>
     </distributionManagement>
 
 </project>

stbf-api/pom.xml

@@ -1,13 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<parent>
 		<groupId>ru.penkrat.stbf</groupId>
 		<artifactId>stbf-parent</artifactId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
   	</parent>
 
 	<artifactId>stbf-api</artifactId>

stbf-api/src/main/java/ru/penkrat/stbf/api/BotRequest.java

@@ -14,4 +14,5 @@ public interface BotRequest {
 
 	Long getChatId();
 
+	BotSession getSession();
 }

stbf-api/src/main/java/ru/penkrat/stbf/api/BotSession.java

@@ -0,0 +1,9 @@
+package ru.penkrat.stbf.api;
+
+public interface BotSession {
+
+    Object getAttribute(String name);
+
+    void setAttribute(String name, Object value);
+
+}

stbf-api/src/main/java/ru/penkrat/stbf/api/SessionProvider.java

@@ -0,0 +1,8 @@
+package ru.penkrat.stbf.api;
+
+@FunctionalInterface
+public interface SessionProvider {
+
+    BotSession get(Long chatId);
+
+}

stbf-common/pom.xml

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>stbf-parent</artifactId>
 		<groupId>ru.penkrat.stbf</groupId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>stbf-common</artifactId>
@@ -16,7 +14,7 @@
 		<dependency>
 			<groupId>ru.penkrat.stbf</groupId>
 			<artifactId>stbf-api</artifactId>
-			<version>0.0.1-SNAPSHOT</version>
+			<version>0.0.2-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>

stbf-common/src/main/java/ru/penkrat/stbf/common/command/SessionAwareCommandChain.java

@@ -0,0 +1,20 @@
+package ru.penkrat.stbf.common.command;
+
+import lombok.RequiredArgsConstructor;
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotResponse;
+import ru.penkrat.stbf.api.CommandChain;
+import ru.penkrat.stbf.api.SessionProvider;
+import ru.penkrat.stbf.common.session.SessionAwareBotRequest;
+
+@RequiredArgsConstructor
+public class SessionAwareCommandChain implements CommandChain {
+
+	private final CommandChain delegate;
+	private final SessionProvider sessionProvider;
+
+	@Override
+	public void processCommand(BotRequest botRequest, BotResponse botResponse) {
+		delegate.processCommand(new SessionAwareBotRequest(botRequest, sessionProvider), botResponse);
+	}
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/command/ThreadPolledCommandChain.java

@@ -0,0 +1,31 @@
+package ru.penkrat.stbf.common.command;
+
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotResponse;
+import ru.penkrat.stbf.api.CommandChain;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+public class ThreadPolledCommandChain implements CommandChain {
+
+	private final CommandChain delegate;
+	private final ExecutorService executor;
+
+	public ThreadPolledCommandChain(CommandChain delegate) {
+		this(delegate, 4);
+	}
+
+	public ThreadPolledCommandChain(CommandChain delegate, int nThreads) {
+		this.delegate = delegate;
+		this.executor = Executors.newFixedThreadPool(nThreads);
+	}
+
+	@Override
+	public void processCommand(BotRequest botRequest, BotResponse botResponse) {
+		executor.execute(() -> {
+			delegate.processCommand(botRequest, botResponse);
+		});
+	}
+
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/session/InMemBotSessionProvider.java

@@ -0,0 +1,18 @@
+package ru.penkrat.stbf.common.session;
+
+import ru.penkrat.stbf.api.BotSession;
+import ru.penkrat.stbf.api.SessionProvider;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class InMemBotSessionProvider implements SessionProvider {
+
+    private static final Map<Long, BotSession> MAP = new ConcurrentHashMap<>();
+
+    @Override
+    public BotSession get(Long chatId) {
+        return MAP.computeIfAbsent(chatId, k -> new MapBackedBotSession(new ConcurrentHashMap<>()));
+    }
+
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/session/MapBackedBotSession.java

@@ -0,0 +1,22 @@
+package ru.penkrat.stbf.common.session;
+
+import lombok.RequiredArgsConstructor;
+import ru.penkrat.stbf.api.BotSession;
+
+import java.util.Map;
+
+@RequiredArgsConstructor
+class MapBackedBotSession implements BotSession {
+
+    private final Map<String, Object> map;
+
+    @Override
+    public Object getAttribute(String name) {
+        return map.get(name);
+    }
+
+    @Override
+    public void setAttribute(String name, Object value) {
+        map.put(name, value);
+    }
+}

stbf-common/src/main/java/ru/penkrat/stbf/common/session/SessionAwareBotRequest.java

@@ -0,0 +1,49 @@
+package ru.penkrat.stbf.common.session;
+
+import lombok.RequiredArgsConstructor;
+import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotSession;
+import ru.penkrat.stbf.api.SessionProvider;
+
+import java.util.Objects;
+import java.util.Optional;
+
+@RequiredArgsConstructor
+public class SessionAwareBotRequest implements BotRequest {
+
+	private final BotRequest delegate;
+
+	private final SessionProvider sessionProvider;
+
+	private BotSession botSession;
+
+	@Override
+	public BotSession getSession() {
+		if (botSession == null) {
+			botSession = sessionProvider.get(getChatId());
+			Objects.requireNonNull(botSession, "Session can not be null");
+		}
+		return botSession;
+	}
+
+	public Optional<String> getMessageText() {
+		return this.delegate.getMessageText();
+	}
+
+	public Optional<String> getPhoneNumber() {
+		return this.delegate.getPhoneNumber();
+	}
+
+	public Optional<String> getCallbackData() {
+		return this.delegate.getCallbackData();
+	}
+
+	public Optional<String> getCallbackMessageText() {
+		return this.delegate.getCallbackMessageText();
+	}
+
+	public Long getChatId() {
+		return this.delegate.getChatId();
+	}
+
+}

stbf-demo/pom.xml

@@ -1,11 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <parent>
         <artifactId>stbf-parent</artifactId>
         <groupId>ru.penkrat.stbf</groupId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>0.0.2-SNAPSHOT</version>
     </parent>
 
     <groupId>ru.penkrat.stbf</groupId>
@@ -35,6 +34,11 @@
             <groupId>ru.penkrat.stbf</groupId>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <artifactId>stbf-common</artifactId>
+            <groupId>ru.penkrat.stbf</groupId>
+            <version>${project.version}</version>
+        </dependency>
         <dependency>
             <groupId>info.picocli</groupId>
             <artifactId>picocli</artifactId>
@@ -108,8 +112,7 @@
                         </goals>
                         <configuration>
                             <transformers>
-                                <transformer
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
-                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                     <mainClass>ru.penkrat.stbf.demo.App</mainClass>
                                 </transformer>
                             </transformers>

stbf-demo/src/main/java/ru/penkrat/stbf/demo/App.java

@@ -5,64 +5,67 @@ import org.slf4j.LoggerFactory;
 import picocli.CommandLine;
 import ru.penkrat.stbf.api.BotCommandChain;
 import ru.penkrat.stbf.api.CommandChain;
+import ru.penkrat.stbf.common.command.SessionAwareCommandChain;
+import ru.penkrat.stbf.common.command.ThreadPolledCommandChain;
+import ru.penkrat.stbf.common.session.InMemBotSessionProvider;
 import ru.penkrat.stbf.impl.pengrad.PengradTelegramBot;
 import ru.penkrat.stbf.templates.xml.XmlFlowResolver;
 
 import java.util.concurrent.atomic.AtomicReference;
 
 @CommandLine.Command(name = "java -jar stbf-demo.jar", mixinStandardHelpOptions = true, description = "Run bot",
-        version = "Simple Telegram bot framework Demo app v. 0.0.1")
+		version = "Simple Telegram bot framework Demo app v. 0.0.2")
 public class App implements Runnable {
 
-    private static final Logger log = LoggerFactory.getLogger(App.class);
+	private static final Logger log = LoggerFactory.getLogger(App.class);
 
-    private static AtomicReference<PengradTelegramBot> botAtomicReference = new AtomicReference<>();
+	private static AtomicReference<PengradTelegramBot> botAtomicReference = new AtomicReference<>();
 
-    @CommandLine.Option(names = {"-f", "--file"}, description = "The file with config.")
+	@CommandLine.Option(names = {"-f", "--file"}, description = "The file with config.")
-    private String flowFile = "classpath:/flow.xml";
+	private String flowFile = "classpath:/flow.xml";
 
-    @CommandLine.Option(names = {"-t", "--token"}, required = true, description = "bot token 1234:abscdf...")
+	@CommandLine.Option(names = {"-t", "--token"}, required = true, description = "bot token 1234:abscdf...")
-    private String botToken = "";
+	private String botToken = "";
 
-    public static void main(String[] args) {
+	public static void main(String[] args) {
-        new CommandLine(new App()).execute(args);
+		new CommandLine(new App()).execute(args);
-    }
+	}
 
-    private BotCommandChain getCommandChain(String filename) {
+	private CommandChain getCommandChain(String filename) {
-        XmlFlowResolver flow = new XmlFlowResolver(filename);
+		XmlFlowResolver flow = new XmlFlowResolver(filename);
 
-        BotCommandChain chain = new BotCommandChain();
+		BotCommandChain chain = new BotCommandChain();
-        flow.getCommands().forEach(chain::add);
+		flow.getCommands().forEach(chain::add);
 
-        return chain;
+		return new ThreadPolledCommandChain(new SessionAwareCommandChain(chain, new InMemBotSessionProvider()));
-    }
+	}
 
-    private Runnable start(String token, CommandChain chain) {
+	private Runnable start(String token, CommandChain chain) {
-        return () -> botAtomicReference.set(new PengradTelegramBot(token, chain));
+		return () -> botAtomicReference.set(new PengradTelegramBot(token, chain));
-    }
+	}
 
-    private void onShutdown() {
+	private void onShutdown() {
-        try {
+		try {
-            if (botAtomicReference.get() != null) {
+			if (botAtomicReference.get() != null) {
-                botAtomicReference.get().close();
+				botAtomicReference.get().close();
-                log.info("Bot finished.");
+				log.info("Bot finished.");
-            }
+			}
-        } catch (Exception e) {
+		} catch (Exception e) {
-            log.error("Error:", e);
+			log.error("Error:", e);
-        }
+		}
-    }
+	}
 
-    @Override
+	@Override
-    public void run() {
+	public void run() {
-        Thread botThread = new Thread(start(botToken, getCommandChain(flowFile)));
+		Thread botThread = new Thread(start(botToken, getCommandChain(flowFile)));
-        botThread.setDaemon(false);
+		botThread.setDaemon(false);
-        botThread.setName("stbf-bot-thread");
+		botThread.setName("stbf-bot-thread");
 
-        Runtime.getRuntime().addShutdownHook(new Thread(this::onShutdown));
+		Runtime.getRuntime().addShutdownHook(new Thread(this::onShutdown));
 
-        log.info("Starting bot...");
+		log.info("Starting bot...");
-        botThread.start();
+		botThread.start();
-        log.info("Bot started.");
+		log.info("Bot started.");
-        log.info("Press Ctrl+C to exit.");
+		log.info("Press Ctrl+C to exit.");
-    }
+	}
 }

stbf-demo/src/main/resources/flow.xml

@@ -68,7 +68,8 @@
             </keyboard>
         </screen>
         <screen id="20005" name="inline-test-2-screen">
-            <text>Inline Screen #2</text>
+            <text>Inline Screen #2
+                  ================</text>
             <keyboard>
                 <row>
                     <button actionRef="inline1-action"></button>

stbf-pengrad/pom.xml

@@ -1,13 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 
 	<parent>
 		<groupId>ru.penkrat.stbf</groupId>
 		<artifactId>stbf-parent</artifactId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
   	</parent>
 
 	<artifactId>stbf-pengrad</artifactId>
@@ -18,12 +16,12 @@
 		<dependency>
 			<groupId>ru.penkrat.stbf</groupId>
 			<artifactId>stbf-api</artifactId>
-			<version>0.0.1-SNAPSHOT</version>
+			<version>0.0.2-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>com.github.pengrad</groupId>
 			<artifactId>java-telegram-bot-api</artifactId>
-			<version>[4.9.0,5.2.0]</version>
+			<version>6.2.0</version>
 		</dependency>
 	</dependencies>
 

stbf-pengrad/src/main/java/ru/penkrat/stbf/impl/pengrad/BotRequestImpl.java

@@ -1,17 +1,17 @@
 package ru.penkrat.stbf.impl.pengrad;
 
-import static lombok.AccessLevel.PROTECTED;
-
-import java.util.Optional;
-
 import com.pengrad.telegrambot.model.CallbackQuery;
 import com.pengrad.telegrambot.model.Contact;
 import com.pengrad.telegrambot.model.Message;
 import com.pengrad.telegrambot.model.Update;
-
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotSession;
+
+import java.util.Optional;
+
+import static lombok.AccessLevel.PROTECTED;
 
 @RequiredArgsConstructor
 public class BotRequestImpl implements BotRequest {
@@ -58,4 +58,9 @@ public class BotRequestImpl implements BotRequest {
 				.orElseGet(() -> update.message()).chat().id();
 	}
 
+	@Override
+	public BotSession getSession() {
+		throw new UnsupportedOperationException("Session is not supported");
+	}
+
 }

stbf-pengrad/src/main/java/ru/penkrat/stbf/impl/pengrad/BotResponseImpl.java

@@ -11,6 +11,7 @@ import com.pengrad.telegrambot.request.AbstractSendRequest;
 import com.pengrad.telegrambot.request.DeleteMessage;
 import com.pengrad.telegrambot.request.EditMessageText;
 import com.pengrad.telegrambot.request.SendDocument;
+import com.pengrad.telegrambot.response.BaseResponse;
 import com.pengrad.telegrambot.response.SendResponse;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -27,7 +28,7 @@ public class BotResponseImpl implements BotResponse {
 
     @Override
     public void send(Screen screen) {
-        log.debug("Send message: \n============\n{}\n============", screen.getText().trim());
+        log.trace("Send trace: \n============\n{}\n============", screen.getText().trim());
 
         AbstractSendRequest<? extends AbstractSendRequest> sendMessage = SendMethodUtils.createFromScreen(chatId(), screen);
 
@@ -36,8 +37,8 @@ public class BotResponseImpl implements BotResponse {
             KeyboardButton[][] keyboard = kk.getKeyboard();
             InlineKeyboardButton[][] inlineKeyboard = kk.getInlineKeyboard();
 
-            if (log.isDebugEnabled()) {
+            if (log.isTraceEnabled()) {
-                log.debug("{}", kk.toFriendlyString());
+                log.trace("{}", kk.toFriendlyString());
             }
 
             if (inlineKeyboard != null && inlineKeyboard.length > 0) {
@@ -45,12 +46,14 @@ public class BotResponseImpl implements BotResponse {
             } else if (keyboard != null && keyboard.length > 0) {
                 sendMessage = sendMessage.replyMarkup(new ReplyKeyboardMarkup(keyboard));
             } else {
-                log.debug("No keyboard");
+                log.trace("No keyboard");
             }
         }
 
         final SendResponse sendResponse = telegramBot.execute(sendMessage);
         SendMethodUtils.processResponse(screen, sendResponse);
+
+        log.debug("Response message = {}", sendResponse.message().messageId());
     }
 
     @Override
@@ -76,18 +79,23 @@ public class BotResponseImpl implements BotResponse {
             KeyboardImpl kk = (KeyboardImpl) screen.getKeyboard();
             InlineKeyboardButton[][] inlineKeyboard = kk.getInlineKeyboard();
 
-            if (log.isDebugEnabled()) {
+            if (log.isTraceEnabled()) {
-                log.debug("{}", kk.toFriendlyString());
+                log.trace("{}", kk.toFriendlyString());
             }
 
             if (inlineKeyboard != null && inlineKeyboard.length > 0) {
                 editMessage = editMessage.replyMarkup(new InlineKeyboardMarkup(inlineKeyboard));
             } else {
-                log.debug("No keyboard");
+                log.trace("No keyboard");
             }
         }
 
-        telegramBot.execute(editMessage);
+        final BaseResponse response = telegramBot.execute(editMessage);
+        if (response.isOk()) {
+            log.debug("Response ok, edit message = {}", messageId());
+        } else {
+            log.debug("Response error code {}", response.errorCode());
+        }
     }
 
     @Override

stbf-pengrad/src/main/java/ru/penkrat/stbf/impl/pengrad/KeyboardImpl.java

@@ -1,6 +1,6 @@
 package ru.penkrat.stbf.impl.pengrad;
 
-import com.google.gson.internal.reflect.ReflectionAccessor;
+import com.google.gson.internal.reflect.ReflectionHelper;
 import com.pengrad.telegrambot.model.request.InlineKeyboardButton;
 import com.pengrad.telegrambot.model.request.KeyboardButton;
 import lombok.Value;
@@ -58,7 +58,7 @@ class KeyboardImpl implements Keyboard {
         return text.computeIfAbsent(btn, o -> {
             try {
                 Field text = btn.getClass().getDeclaredField("text");
-                ReflectionAccessor.getInstance().makeAccessible(text);
+                ReflectionHelper.makeAccessible(text);
                 return String.valueOf(text.get(btn));
             } catch (NoSuchFieldException | IllegalAccessException e) {
                 return "*error*";

stbf-pengrad/src/main/java/ru/penkrat/stbf/impl/pengrad/PengradTelegramBot.java

@@ -2,11 +2,13 @@ package ru.penkrat.stbf.impl.pengrad;
 
 import com.pengrad.telegrambot.TelegramBot;
 import com.pengrad.telegrambot.UpdatesListener;
+import com.pengrad.telegrambot.model.CallbackQuery;
 import com.pengrad.telegrambot.model.Update;
-
 import lombok.extern.slf4j.Slf4j;
 import ru.penkrat.stbf.api.CommandChain;
 
+import java.util.Optional;
+
 @Slf4j
 public class PengradTelegramBot extends TelegramBot implements AutoCloseable {
 
@@ -15,6 +17,13 @@ public class PengradTelegramBot extends TelegramBot implements AutoCloseable {
 		this.setUpdatesListener(updates -> {
 			for (Update update : updates) {
 				try {
+					final Long chatId = Optional.of(update)
+							.map(Update::callbackQuery)
+							.map(CallbackQuery::message)
+							.orElseGet(() -> update.message()).chat().id();
+
+					log.debug("New message in chat {}", chatId);
+
 					commandChain.processCommand(
 							new BotRequestImpl(update),
 							new BotResponseImpl(update, this));

stbf-rubenlagus/pom.xml

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>stbf-parent</artifactId>
 		<groupId>ru.penkrat.stbf</groupId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>stbf-rubenlagus</artifactId>
@@ -17,7 +15,7 @@
 		<dependency>
 			<groupId>ru.penkrat.stbf</groupId>
 			<artifactId>stbf-api</artifactId>
-			<version>0.0.1-SNAPSHOT</version>
+			<version>0.0.2-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>org.telegram</groupId>

stbf-rubenlagus/src/main/java/ru/penkrat/stbf/impl/rubenlagus/BotRequestImpl.java

@@ -1,17 +1,17 @@
 package ru.penkrat.stbf.impl.rubenlagus;
 
-import static lombok.AccessLevel.PROTECTED;
+import lombok.Getter;
-
+import lombok.RequiredArgsConstructor;
-import java.util.Optional;
-
 import org.telegram.telegrambots.meta.api.objects.CallbackQuery;
 import org.telegram.telegrambots.meta.api.objects.Contact;
 import org.telegram.telegrambots.meta.api.objects.Message;
 import org.telegram.telegrambots.meta.api.objects.Update;
-
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotSession;
+
+import java.util.Optional;
+
+import static lombok.AccessLevel.PROTECTED;
 
 @RequiredArgsConstructor
 class BotRequestImpl implements BotRequest {
@@ -52,7 +52,12 @@ class BotRequestImpl implements BotRequest {
 
 	@Override
 	public Long getChatId() {
-		return update.getMessage().getChatId();
+		return Utils.getChatId(update);
+	}
+
+	@Override
+	public BotSession getSession() {
+		throw new UnsupportedOperationException("Session is not supported");
 	}
 
 }

stbf-rubenlagus/src/main/java/ru/penkrat/stbf/impl/rubenlagus/RubenlagusTelegramBot.java

@@ -1,12 +1,11 @@
 package ru.penkrat.stbf.impl.rubenlagus;
 
+import lombok.extern.slf4j.Slf4j;
 import org.telegram.telegrambots.bots.TelegramLongPollingBot;
 import org.telegram.telegrambots.meta.TelegramBotsApi;
 import org.telegram.telegrambots.meta.api.objects.Update;
 import org.telegram.telegrambots.meta.exceptions.TelegramApiException;
 import org.telegram.telegrambots.updatesreceivers.DefaultBotSession;
-
-import lombok.extern.slf4j.Slf4j;
 import ru.penkrat.stbf.api.BotCommandChain;
 
 @Slf4j

stbf-rubenlagus/src/main/java/ru/penkrat/stbf/impl/rubenlagus/Utils.java

@@ -0,0 +1,21 @@
+package ru.penkrat.stbf.impl.rubenlagus;
+
+import lombok.experimental.UtilityClass;
+import org.telegram.telegrambots.meta.api.objects.Update;
+
+@UtilityClass
+class Utils {
+
+    Long getChatId(Update update) {
+        if (update.getMessage() != null) {
+            return update.getMessage().getChatId();
+        }
+
+        if (update.getCallbackQuery() != null) {
+            update.getCallbackQuery().getMessage().getChatId();
+        }
+
+        throw new IllegalStateException("Can't extract chatId from 'Update'");
+    }
+
+}

stbf-templates/pom.xml

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>stbf-parent</artifactId>
 		<groupId>ru.penkrat.stbf</groupId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
 	</parent>
 	<artifactId>stbf-templates</artifactId>
 	<properties>

stbf-templates/src/main/java/ru/penkrat/stbf/templates/utils/StringUtils.java

@@ -2,9 +2,14 @@ package ru.penkrat.stbf.templates.utils;
 
 import lombok.experimental.UtilityClass;
 
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
 @UtilityClass
 public class StringUtils {
 
+    public static final String NL_DELIMITER = "\n";
+
     public boolean isEmpty(String string) {
         return string == null || string.isEmpty();
     }
@@ -12,4 +17,13 @@ public class StringUtils {
     public boolean isNotEmpty(String string) {
         return !isEmpty(string);
     }
+
+    public String ltrim(String text) {
+        if (text == null) {
+            return null;
+        }
+        return Stream.of(text.split(NL_DELIMITER))
+                .map(string -> string.trim())
+                .collect(Collectors.joining(NL_DELIMITER));
+    }
 }

stbf-templates/src/main/java/ru/penkrat/stbf/templates/xml/FlowScreenResolverDelegate.java

@@ -44,27 +44,35 @@ class FlowScreenResolverDelegate implements ScreenResolver {
     public Screen getScreen(String name) {
         ScreenItem item = resolver.get(name);
 
+        String text = item.getText();
+        if (!item.isPreserve()) {
+            text = StringUtils.ltrim(text);
+        }
         if (StringUtils.isNotEmpty(item.getMediaRef())) {
             final Media media = mediaResolver.getMedia(item.getMediaRef());
-            final MediaScreen mediaScreen = new MediaScreen(item.getText(), media, buildKeyboard(item.getKeyboard(), null));
+            final MediaScreen mediaScreen = new MediaScreen(text, media, buildKeyboard(item.getKeyboard(), null));
             return new RamFileIdStorageMediaScreen(mediaScreen);
         }
 
-        return new TextScreen(item.getText(), buildKeyboard(item.getKeyboard(), null));
+        return new TextScreen(text, buildKeyboard(item.getKeyboard(), null));
     }
 
     @Override
     public Screen getScreen(String name, Object context) {
         ScreenItem item = resolver.get(name);
 
+        String text = item.getText();
+        if (!item.isPreserve()) {
+            text = StringUtils.ltrim(text);
+        }
         if (StringUtils.isNotEmpty(item.getMediaRef())) {
             final Media media = mediaResolver.getMedia(item.getMediaRef());
-            final MediaScreen mediaScreen = new MediaScreen(templateRenderer.render(item.getText(), context), media,
+            final MediaScreen mediaScreen = new MediaScreen(templateRenderer.render(text, context), media,
                     resolveKeyboard(item.getKeyboard(), context));
             return new RamFileIdStorageMediaScreen(mediaScreen);
         }
 
-        return new TextScreen(templateRenderer.render(item.getText(), context),
+        return new TextScreen(templateRenderer.render(text, context),
                 resolveKeyboard(item.getKeyboard(), context));
     }
 

stbf-templates/src/main/java/ru/penkrat/stbf/templates/xml/ScreenItem.java

@@ -15,4 +15,7 @@ class ScreenItem extends NamedItem {
 
     private KeyboardWrapper keyboard = new KeyboardWrapper();
 
+    @JacksonXmlProperty(isAttribute = true)
+    private boolean preserve;
+
 }

stbf-test/pom.xml

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<artifactId>stbf-parent</artifactId>
 		<groupId>ru.penkrat.stbf</groupId>
-		<version>0.0.1-SNAPSHOT</version>
+		<version>0.0.2-SNAPSHOT</version>
 	</parent>
 
 	<artifactId>stbf-test</artifactId>
@@ -16,12 +14,12 @@
 		<dependency>
 			<groupId>ru.penkrat.stbf</groupId>
 			<artifactId>stbf-api</artifactId>
-			<version>0.0.1-SNAPSHOT</version>
+			<version>0.0.2-SNAPSHOT</version>
 		</dependency>
 		<dependency>
 			<groupId>ru.penkrat.stbf</groupId>
 			<artifactId>stbf-common</artifactId>
-			<version>0.0.1-SNAPSHOT</version>
+			<version>0.0.2-SNAPSHOT</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>

stbf-test/src/main/java/ru/penkrat/stbf/test/BotRequestImpl.java

@@ -6,6 +6,7 @@ import java.util.Random;
 import lombok.Builder;
 import lombok.Getter;
 import ru.penkrat.stbf.api.BotRequest;
+import ru.penkrat.stbf.api.BotSession;
 
 @Builder
 class BotRequestImpl implements BotRequest {
@@ -14,6 +15,7 @@ class BotRequestImpl implements BotRequest {
 	private String phoneNumber;
 	private String callbackData;
 	private String callbackMessageText;
+	private BotSession session;
 
 	@Getter
 	@Builder.Default
@@ -39,4 +41,9 @@ class BotRequestImpl implements BotRequest {
 		return Optional.ofNullable(callbackMessageText);
 	}
 
+	@Override
+	public BotSession getSession() {
+		return session;
+	}
+
 }