Add project files

.gitignore

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+.idea
+build

README.md

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+# Robokassa Library
+A simple interface library for Joomla that includes Robokassa methods.

build.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project name="Robokassa Library" default="make" basedir=".">
+	<tstamp>
+		<format property="build.date" pattern="%Y-%m-%d" />
+	</tstamp>
+	<property name="directory" value="build" />
+	<property name="prefix" value="lib" />
+	<property name="extension" value="robokassa" />
+	<property name="version" value="1.0.0" />
+	<target name="make-dev" description="Builds the extension release package for development testing.">
+		<echo msg="Deleting old development build." />
+		<mkdir dir="${directory}" />
+		<delete quiet="yes">
+			<fileset dir="${directory}">
+				<include name="${prefix}_${extension}_dev.zip" />
+			</fileset>
+		</delete>
+		<echo msg="Making the development ${extension} package." />
+		<phingcall target="build">
+			<property name="version" value="dev" />
+		</phingcall>
+	</target>
+	<target name="make" description="Builds the extension release package for a version.">
+		<echo msg="Making the ${extension} package for version ${version}." />
+		<mkdir dir="${directory}" />
+		<phingcall target="build"></phingcall>
+	</target>
+	<target name="build" description="Builds the extension release package.">
+		<zip destfile="${directory}/${prefix}_${extension}_${version}.zip">
+			<fileset dir=".">
+				<include name="src/**" />
+				<include name="LICENSE" />
+				<include name="README.*" />
+				<include name="${extension}.*" />
+			</fileset>
+		</zip>
+	</target>
+</project>

robokassa.xml

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+<?xml version="1.0" encoding="UTF-8" ?>
+<extension type="library" method="upgrade" version="4.2">
+	<name>NorrNext Robokassa Library</name>
+	<libraryname>NorrNext/Robokassa</libraryname>
+	<creationDate>02/04/2023</creationDate>
+	<author>Dmitrijs Rekuns</author>
+	<authorEmail>[email protected]</authorEmail>
+	<authorUrl>https://norrnext.com</authorUrl>
+	<copyright>(C) 2023 NorrNext. All rights reserved.</copyright>
+	<license>GNU General Public License version 3 or later; see LICENSE</license>
+	<version>1.0.0</version>
+	<description>A simple interface library for Joomla that includes Robokassa methods.</description>
+	<namespace path="src">NorrNext\Robokassa</namespace>
+	<files>
+		<folder>src</folder>
+	</files>
+	<updateservers>
+		<server
+			type="extension"
+			priority="1"
+			name="NorrNext - Robokassa Library">
+			https://raw.githubusercontent.com/NorrNext/lib-robokassa/master/update_manifest.xml
+		</server>
+	</updateservers>
+</extension>