commit 2a6dec29226ad4c441591eb1f4bbfc5c5566971c
Author: Sambo Chea <sombochea@cubetiqs.com>
Date:   Thu May 20 18:43:52 2021 +0700

    Completed telegram messaging service and provider for send message via bot

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a281dd4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,38 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+.DS_Store
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..809e1c5
--- /dev/null
+++ b/README.md
@@ -0,0 +1,14 @@
+# CUBETIQ Messaging Client
+- [x] Message Provider
+- [x] Telegram
+- [ ] SMS
+
+# How-to-use
+- Environment
+```text
+CUBETIQ_TELEGRAM_TOKEN: Telegram Bot Token
+CUBETIQ_TELEGRAM_RECEIVER: Telegram Chat Id to receiver the message
+```
+
+# Contributors
+- Sambo Chea <sombochea@cubetiqs.com>
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..e312c02
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,37 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+	id("java")
+	kotlin("jvm") version "1.4.32"
+}
+
+group = "com.cubetiqs"
+version = "0.0.1-SNAPSHOT"
+java.sourceCompatibility = JavaVersion.VERSION_1_8
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation("com.squareup.okhttp3:okhttp:4.9.0")
+
+	implementation("org.jetbrains.kotlin:kotlin-reflect")
+	implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+
+	testImplementation("org.junit.jupiter:junit-jupiter:5.7.0")
+}
+
+tasks.withType<KotlinCompile> {
+	kotlinOptions {
+		freeCompilerArgs = listOf("-Xjsr305=strict")
+		jvmTarget = "1.8"
+	}
+}
+
+tasks.test {
+	useJUnitPlatform()
+	testLogging {
+		events("passed", "skipped", "failed")
+	}
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..e708b1c
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..442d913
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100644
index 0000000..4f906e0
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# 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
+#
+#      https://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.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..f05bcc9
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "messaging-client"
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/provider/MessageProvider.kt b/src/main/kotlin/com/cubetiqs/messaging/client/provider/MessageProvider.kt
new file mode 100644
index 0000000..c437c2c
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/provider/MessageProvider.kt
@@ -0,0 +1,6 @@
+package com.cubetiqs.messaging.client.provider
+
+@FunctionalInterface
+fun interface MessageProvider {
+    fun send(): Any?
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/sms/SmsProvider.kt b/src/main/kotlin/com/cubetiqs/messaging/client/sms/SmsProvider.kt
new file mode 100644
index 0000000..9419fd5
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/sms/SmsProvider.kt
@@ -0,0 +1,6 @@
+package com.cubetiqs.messaging.client.sms
+
+import com.cubetiqs.messaging.client.provider.MessageProvider
+
+interface SmsProvider : MessageProvider {
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramBotUtils.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramBotUtils.kt
new file mode 100644
index 0000000..cb0afe1
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramBotUtils.kt
@@ -0,0 +1,90 @@
+package com.cubetiqs.messaging.client.telegram
+
+import com.cubetiqs.messaging.client.webclient.WebClientUtils
+import okhttp3.*
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.RequestBody.Companion.asRequestBody
+import java.nio.file.Files
+
+object TelegramBotUtils {
+    private fun getBotUrl(endpoint: String, token: String = ""): String {
+        return "${TelegramConfig.TELEGRAM_API}/bot${token.removePrefix("bot")}/${endpoint.removePrefix("/")}"
+    }
+
+    private fun makeRequest(
+        request: Request,
+    ): Response? {
+        println(javaClass.canonicalName + " => Start send message via telegram bot...")
+        return try {
+            WebClientUtils.makeRequest(request)
+        } catch (ex: Exception) {
+            ex.printStackTrace()
+            println("Make request error @${ex.message}")
+            null
+        }
+    }
+
+    @JvmStatic
+    fun sendMessage(
+        // usually chat id from chat group
+        chatId: String,
+        // message to send
+        text: String,
+        // config prefix for custom token
+        token: String = "",
+    ): Any? {
+        val requestBody = MultipartBody.Builder()
+            .addFormDataPart("text", text)
+            .addFormDataPart("chat_id", chatId)
+            .setType(MultipartBody.FORM)
+            .build()
+
+        val url = getBotUrl(TelegramConfig.SEND_MESSAGE, token)
+        val request = Request.Builder()
+            .url(url)
+            .post(requestBody)
+            .build()
+
+        val result = makeRequest(request)
+        println(javaClass.canonicalName + " => Complete sent message to $chatId...")
+        return result
+    }
+
+    @JvmStatic
+    fun sendDocument(
+        // usually chat id from chat group
+        chatId: String,
+        // message to send
+        text: String,
+        // document extension (example: my_file.pdf, my_file.docx, etc)
+        filename: String,
+        // document in byte array
+        document: ByteArray,
+        // config prefix for custom token
+        token: String = "",
+    ): Any? {
+        val ext = filename.split(".").lastOrNull() ?: "dat"
+        val tempFile = Files.createTempFile(filename.removeSuffix(ext), ".$ext")
+        Files.write(tempFile, document)
+
+        val requestBody = MultipartBody.Builder()
+            .addFormDataPart(
+                "document", filename,
+                tempFile.toFile().asRequestBody("application/octet-stream".toMediaTypeOrNull())
+            )
+            .addFormDataPart("caption", text)
+            .addFormDataPart("chat_id", chatId)
+            .setType(MultipartBody.FORM)
+            .build()
+
+        val url = getBotUrl(TelegramConfig.SEND_DOCUMENT, token)
+        val request = Request.Builder()
+            .url(url)
+            .post(requestBody)
+            .build()
+
+        val result = makeRequest(request)
+        println(javaClass.canonicalName + " => Complete sent document to $chatId...")
+        return result
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramChatMessage.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramChatMessage.kt
new file mode 100644
index 0000000..5d31b46
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramChatMessage.kt
@@ -0,0 +1,15 @@
+package com.cubetiqs.messaging.client.telegram
+
+/**
+ * Telegram Chat Message
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+open class TelegramChatMessage(
+    private val text: String? = null,
+) : TelegramMessage {
+    override fun getText(): String {
+        return text ?: ""
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramConfig.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramConfig.kt
new file mode 100644
index 0000000..49ba010
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramConfig.kt
@@ -0,0 +1,22 @@
+package com.cubetiqs.messaging.client.telegram
+
+import com.cubetiqs.messaging.client.util.ConfigUtils
+
+object TelegramConfig {
+    const val TELEGRAM_API = "https://api.telegram.org"
+    const val SEND_DOCUMENT = "/sendDocument"
+    const val SEND_MESSAGE = "/sendMessage"
+    const val POS_SYSTEM_ID = ""
+    private const val CUBETIQ_TELEGRAM_TOKEN = "CUBETIQ_TELEGRAM_TOKEN"
+    private const val CUBETIQ_TELEGRAM_RECEIVER = "CUBETIQ_TELEGRAM_RECEIVER"
+
+    @JvmStatic
+    fun getToken(): String {
+        return ConfigUtils.getEnv(CUBETIQ_TELEGRAM_TOKEN, ConfigUtils.getProperty(CUBETIQ_TELEGRAM_TOKEN)) ?: throw NullPointerException("CUBETIQ_TELEGRAM_TOKEN is required for Telegram Sender!")
+    }
+
+    @JvmStatic
+    fun getReceiver(): String {
+        return ConfigUtils.getEnv(CUBETIQ_TELEGRAM_RECEIVER, ConfigUtils.getProperty(CUBETIQ_TELEGRAM_RECEIVER, "-360594386")) ?: throw NullPointerException("CUBETIQ_TELEGRAM_RECEIVER is required for Telegram Receiver!")
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramDocument.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramDocument.kt
new file mode 100644
index 0000000..bebdab3
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramDocument.kt
@@ -0,0 +1,16 @@
+package com.cubetiqs.messaging.client.telegram
+
+/**
+ * Telegram Chat Document
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+open class TelegramDocument(
+    val document: TelegramFileDocument? = null,
+    private val text: String? = null,
+) : TelegramMessage {
+    override fun getText(): String {
+        return text ?: ""
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramFileDocument.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramFileDocument.kt
new file mode 100644
index 0000000..4203660
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramFileDocument.kt
@@ -0,0 +1,16 @@
+package com.cubetiqs.messaging.client.telegram
+
+import java.io.Serializable
+
+/**
+ * File Document
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+open class TelegramFileDocument (
+    var file: ByteArray? = null,
+    var name: String? = null,
+    var type: String? = null,
+    var extension: String? = null,
+) : Serializable
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramMessage.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramMessage.kt
new file mode 100644
index 0000000..745c8a2
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramMessage.kt
@@ -0,0 +1,13 @@
+package com.cubetiqs.messaging.client.telegram
+
+import java.io.Serializable
+
+/**
+ * Telegram Message
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+interface TelegramMessage : Serializable {
+    fun getText(): String
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramProvider.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramProvider.kt
new file mode 100644
index 0000000..13167b7
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramProvider.kt
@@ -0,0 +1,84 @@
+package com.cubetiqs.messaging.client.telegram
+
+import com.cubetiqs.messaging.client.provider.MessageProvider
+import com.sun.org.slf4j.internal.LoggerFactory
+import kotlin.IllegalArgumentException
+
+/**
+ * Telegram Provider
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+class TelegramProvider : MessageProvider {
+    private val log = LoggerFactory.getLogger(this::class.java)
+    private var _token: String = ""
+    private var _chatId: String = ""
+    private var _message: TelegramMessage? = null
+
+    fun sendToChatId(chatId: String) = apply {
+        this._chatId = chatId
+    }
+
+    fun messageToSend(message: TelegramMessage?) = apply {
+        this._message = message
+    }
+
+    fun setBotToken(token: String) = apply {
+        this._token = token
+    }
+
+    fun send(
+        chatId: String,
+        message: TelegramMessage,
+    ): TelegramResponse? {
+        if (_token.isEmpty() || _token.isBlank()) {
+            throw IllegalArgumentException("token must be provide for send message!")
+        }
+
+        if (_message?.getText().isNullOrEmpty()) return null
+
+        return try {
+            val response = TelegramBotUtils.sendMessage(
+                chatId = chatId,
+                token = this._token,
+                text = this._message!!.getText(),
+            )
+
+            TelegramResponse(
+                response = response,
+            )
+        } catch (ex: Exception) {
+            log.error("[Telegram] Message send error: ${ex.message}!")
+            null
+        }
+    }
+
+    override fun send(): Any? {
+        if (this._message?.getText().isNullOrEmpty()) {
+            throw IllegalArgumentException("message must be non-null or non-empty!")
+        }
+
+        return send(this._chatId, this._message!!)
+    }
+
+    override fun toString(): String {
+        return "TelegramProvider(_token='$_token', _chatId='$_chatId', _message=$_message)"
+    }
+
+    companion object {
+        @JvmStatic
+        fun init(token: String): TelegramProvider {
+            return TelegramProvider()
+                .setBotToken(token)
+        }
+
+        @JvmStatic
+        fun sendMessage(token: String, chatId: String, text: String): Any? {
+            return init(token)
+                .sendToChatId(chatId)
+                .messageToSend(TelegramChatMessage(text))
+                .send()
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramResponse.kt b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramResponse.kt
new file mode 100644
index 0000000..e072b6c
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/telegram/TelegramResponse.kt
@@ -0,0 +1,18 @@
+package com.cubetiqs.messaging.client.telegram
+
+import java.io.Serializable
+
+/**
+ * Telegram Response
+ *
+ * @author sombochea
+ * @since 1.0
+ */
+class TelegramResponse(
+    val request: Any? = null,
+    val response: Any? = null,
+) : Serializable {
+    override fun toString(): String {
+        return "TelegramResponse(request=$request, response=$response)"
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/util/ConfigUtils.kt b/src/main/kotlin/com/cubetiqs/messaging/client/util/ConfigUtils.kt
new file mode 100644
index 0000000..a671000
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/util/ConfigUtils.kt
@@ -0,0 +1,13 @@
+package com.cubetiqs.messaging.client.util
+
+object ConfigUtils {
+    @JvmStatic
+    fun getEnv(key: String, defaultValue: String? = null): String? {
+        return System.getenv(key) ?: defaultValue
+    }
+
+    @JvmStatic
+    fun getProperty(key: String, defaultValue: String? = null): String? {
+        return System.getProperty(key, defaultValue)
+    }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/com/cubetiqs/messaging/client/webclient/WebClientUtils.kt b/src/main/kotlin/com/cubetiqs/messaging/client/webclient/WebClientUtils.kt
new file mode 100644
index 0000000..4020d57
--- /dev/null
+++ b/src/main/kotlin/com/cubetiqs/messaging/client/webclient/WebClientUtils.kt
@@ -0,0 +1,31 @@
+package com.cubetiqs.messaging.client.webclient
+
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import okhttp3.Response
+
+object WebClientUtils {
+    private var webClient: OkHttpClient? = null
+
+    private fun getClient(): OkHttpClient {
+        if (this.webClient == null) {
+            this.webClient = OkHttpClient()
+        }
+
+        return this.webClient!!
+    }
+
+    @JvmStatic
+    fun makeRequest(request: Request): Response {
+        val call = getClient().newCall(request)
+        var response: Response? = null
+        return try {
+            response = call.execute()
+            response
+        } catch (ex: Exception) {
+            throw Exception(ex)
+        } finally {
+            response?.close()
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/cubetiq.png b/src/main/resources/cubetiq.png
new file mode 100644
index 0000000..9e97bd1
Binary files /dev/null and b/src/main/resources/cubetiq.png differ
diff --git a/src/test/java/com/cubetiqs/example/TelegramExampleJavaTests.java b/src/test/java/com/cubetiqs/example/TelegramExampleJavaTests.java
new file mode 100644
index 0000000..644d64a
--- /dev/null
+++ b/src/test/java/com/cubetiqs/example/TelegramExampleJavaTests.java
@@ -0,0 +1,48 @@
+package com.cubetiqs.example;
+
+import com.cubetiqs.messaging.client.telegram.TelegramBotUtils;
+import com.cubetiqs.messaging.client.telegram.TelegramConfig;
+import com.cubetiqs.messaging.client.telegram.TelegramProvider;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+
+public final class TelegramExampleJavaTests {
+    private final String token = TelegramConfig.getToken();
+    private final String chatId = TelegramConfig.getReceiver();
+
+    @Test
+    public void sendMessage() {
+        String text = "Hello, Sambo!";
+        TelegramBotUtils.sendMessage(
+                chatId,
+                text,
+                token
+        );
+    }
+
+    @Test
+    public void sendDocument() throws IOException {
+        String text = "Hello, Sambo with my paper!";
+        File file = new File("src/main/resources/cubetiq.png");
+        TelegramBotUtils.sendDocument(
+                chatId,
+                text,
+                "my paper.png",
+                Files.readAllBytes(file.toPath()),
+                token
+        );
+    }
+
+    @Test
+    public void sendMessageProvider() {
+        String text = "Hello, Sambo with Provider!";
+        TelegramProvider.sendMessage(
+                chatId,
+                text,
+                token
+        );
+    }
+}
diff --git a/src/test/kotlin/com/cubetiqs/example/TelegramExampleKotlinTests.kt b/src/test/kotlin/com/cubetiqs/example/TelegramExampleKotlinTests.kt
new file mode 100644
index 0000000..9abfdae
--- /dev/null
+++ b/src/test/kotlin/com/cubetiqs/example/TelegramExampleKotlinTests.kt
@@ -0,0 +1,44 @@
+package com.cubetiqs.example
+
+import com.cubetiqs.messaging.client.telegram.TelegramBotUtils
+import com.cubetiqs.messaging.client.telegram.TelegramConfig
+import com.cubetiqs.messaging.client.telegram.TelegramProvider
+import org.junit.jupiter.api.Test
+import java.io.File
+
+class TelegramExampleKotlinTests {
+    private val token = TelegramConfig.POS_SYSTEM_ID
+    private val chatId = "-360594386"
+
+    @Test
+    fun sendMessage() {
+        val text = "Hello World"
+        TelegramBotUtils.sendMessage(
+            chatId = chatId,
+            token = token,
+            text = text,
+        )
+    }
+
+    @Test
+    fun sendDocument() {
+        val text = "My document caption"
+        TelegramBotUtils.sendDocument(
+            chatId = chatId,
+            token = token,
+            text = text,
+            filename = "my exam paper.png",
+            document = File("src/main/resources/cubetiq.png").readBytes(),
+        )
+    }
+
+    @Test
+    fun sendMessageProvider() {
+        val text = "Hello World from Provider"
+        TelegramProvider.sendMessage(
+            chatId = chatId,
+            token = token,
+            text = text,
+        )
+    }
+}
\ No newline at end of file