Add isAbsoluteUrl

Author: anton-knyazev

extensionslib/src/main/java/com/omega_r/libs/extensions/string/UrlExtensions.kt

@@ -0,0 +1,7 @@
+package com.omega_r.libs.extensions.string
+
+import java.util.regex.Pattern
+
+private val PATTERN_ABSOLUTE_URL = Pattern.compile("\\A[a-z0-9.+-]+://.*", Pattern.CASE_INSENSITIVE)
+
+fun String.isAbsoluteUrl(): Boolean = PATTERN_ABSOLUTE_URL.matcher(this).matches()