regex email validator

Author: PankraSerg

common/src/main/java/jp/co/soramitsu/common/utils/EmailValidator.kt

@@ -0,0 +1,19 @@
+package jp.co.soramitsu.common.utils
+
+import java.util.regex.Pattern
+
+class EmailValidator {
+    companion object {
+        @JvmStatic
+        private val pattern = Pattern.compile(
+            "^[a-z0-9!#\$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#\$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\$",
+            Pattern.CASE_INSENSITIVE
+        )
+
+        @JvmStatic
+        fun isValid(emailStr: String): Boolean {
+            val matcher = pattern.matcher(emailStr)
+            return matcher.find()
+        }
+    }
+}

feature-crowdloan-impl/src/main/java/jp/co/soramitsu/feature_crowdloan_impl/presentation/contribute/custom/referral/ReferralContributeViewState.kt

@@ -1,6 +1,7 @@
 package jp.co.soramitsu.feature_crowdloan_impl.presentation.contribute.custom.referral
 
 import jp.co.soramitsu.common.resources.ResourceManager
+import jp.co.soramitsu.common.utils.EmailValidator
 import jp.co.soramitsu.feature_crowdloan_impl.R
 import jp.co.soramitsu.feature_crowdloan_impl.data.network.api.parachain.FLOW_FEARLESS_REFERRAL
 import jp.co.soramitsu.feature_crowdloan_impl.data.network.api.parachain.FLOW_TERMS_URL
@@ -80,7 +81,7 @@ abstract class ReferralContributeViewState(
         isAcala -> enteredEmailFlow.combine(emailAgreedFlow) { input, agreed ->
             when {
                 !agreed -> true
-                input.length > 2 && agreed -> true
+                EmailValidator.isValid(input) && agreed -> true
                 else -> false
             }
         }