如何在mode中添加判断条件，想要简化代码这样写要写9个重复的

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output method="xml" indent="yes"/>
    <xsl:template match="transactions">
        <Transactions>
            <giftShop number="1">
                <Date date="01/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a1"/>
                </Date>
                <Date date="02/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a2"/>
                </Date>
                <Date date="03/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a3"/>
                </Date>
            </giftShop>
            <giftShop number="2">
                <Date date="01/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a4"/>
                </Date>
                <Date date="02/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a5"/>
                </Date>
                <Date date="03/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a6"/>
                </Date>
            </giftShop>
            <giftShop number="3">
                <Date date="01/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a7"/>
                </Date>
                <Date date="02/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a8"/>
                </Date>
                <Date date="03/11/2019">
                    <xsl:apply-templates select="transaction" mode = "a9"/>
                </Date>
            </giftShop>
        </Transactions>
    </xsl:template>
    <xsl:template match="transaction" mode="a1">
        <xsl:variable name="addIn" select="document('retail_customers.xml')"/>
        <xsl:variable name="customerID" select="customerID"/>
        <xsl:choose>
            <xsl:when test="giftShop='1' and transaction_date='01/11/2019'">
                <Transaction>
                    <accountnumber> <xsl:text disable-output-escaping="yes"><![CDATA[&nbsp;&nbsp;]]></xsl:text></accountnumber>
                    <xsl:copy-of select="transactionID"/>
                    <xsl:copy-of select="value"/>
                    <xsl:copy-of select="customerID"/>
                    <xsl:for-each select="$addIn/customers/customer">
                        <xsl:if test="customerID=$customerID">
                            <xsl:copy-of select="prefix"/>
                            <xsl:copy-of select="lastName"/>
                            <xsl:copy-of select="givenName"/>
                            <xsl:copy-of select="addressID"/>
                        </xsl:if>
                    </xsl:for-each>
                </Transaction>
            </xsl:when>
            <xsl:otherwise>
            </xsl:otherwise>
        </xsl:choose>
    </xsl:template>