<?xml version="1.0" encoding="UTF-8"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="config">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="view" type="viewType" minOccurs="1" maxOccurs="unbounded" />
            </xs:sequence>
        </xs:complexType>
        <xs:unique name="uniqueViewId">
            <xs:annotation>
                <xs:documentation>
                    View Id must be unique.
                </xs:documentation>
            </xs:annotation>
            <xs:selector xpath="view" />
            <xs:field xpath="@id" />
        </xs:unique>
    </xs:element>

    <xs:complexType name="viewType">
        <xs:annotation>
            <xs:documentation>
                View declaration.
            </xs:documentation>
        </xs:annotation>
        <xs:sequence>
            <xs:element minOccurs="0" name="subscriptions" type="subscriptionsType">
                <xs:unique name="uniqueSubscriptionsTable">
                    <xs:annotation>
                        <xs:documentation>
                            Table must be unique.
                        </xs:documentation>
                    </xs:annotation>
                    <xs:selector xpath=".//table" />
                    <xs:field xpath="@name" />
                    <xs:field xpath="@entity_column" />
                </xs:unique>
            </xs:element>
        </xs:sequence>
        <xs:attribute name="id" type="xs:string" use="required" />
        <xs:attribute name="class" type="classType" use="required" />
        <xs:attribute name="group" type="xs:string" use="required" />
    </xs:complexType>

    <xs:simpleType name="classType">
        <xs:annotation>
            <xs:documentation>
                Class name can contain only [a-zA-Z|\\]+[a-zA-Z0-9\\]+.
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-zA-Z|\\]+[a-zA-Z0-9\\]+" />
        </xs:restriction>
    </xs:simpleType>

    <xs:complexType name="subscriptionsType">
        <xs:annotation>
            <xs:documentation>
                Subscriptions declaration.
            </xs:documentation>
        </xs:annotation>
        <xs:sequence>
            <xs:element name="table" type="subscriptionsTableType" minOccurs="1" maxOccurs="unbounded" />
        </xs:sequence>
    </xs:complexType>

    <xs:complexType name="subscriptionsTableType">
        <xs:annotation>
            <xs:documentation>
                Table declaration.
            </xs:documentation>
        </xs:annotation>
        <xs:attribute name="name" type="tableNameType" use="required" />
        <xs:attribute name="entity_column" type="entityColumnType" use="required" />
        <xs:attribute name="subscription_model" type="subscriptionModelType" />
    </xs:complexType>

    <xs:simpleType name="entityColumnType">
        <xs:annotation>
            <xs:documentation>
                Entity column can contain only [a-z_].
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-z_]+" />
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="tableNameType">
        <xs:annotation>
            <xs:documentation>
                Table name can contain only [a-z_].
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-z_]+" />
        </xs:restriction>
    </xs:simpleType>

    <xs:simpleType name="subscriptionModelType">
        <xs:annotation>
            <xs:documentation>
                DEPRECATED. Subscription model must be a valid PHP class or interface name.
            </xs:documentation>
        </xs:annotation>
        <xs:restriction base="xs:string">
            <xs:pattern value="[a-zA-Z_][a-zA-Z0-9\\]*" />
        </xs:restriction>
    </xs:simpleType>
</xs:schema>