Copyright 2018 Red Hat, Inc.

 Author: Jan Pokorny <jpokorny@redhat.com>

 Part of pacemaker project

 SPDX-License-Identifier: GPL-2.0-or-later

 -->

                xmlns:cibtr="http://clusterlabs.org/ns/pacemaker/cibtr-2"

                exclude-result-prefixes="cibtr"

		cibtr:filename="upgrade-2.10-leave.xsl">

<xsl:output method="xml" encoding="UTF-8" indent="yes" omit-xml-declaration="yes"/>

<xsl:param name="cibtr:label-debug"   select="'DEBUG: '"/>

 GENERIC UTILITIES

 -->

 Recursive implementation of "basename"

 Merely parameter driven, no implicit context taken into account:

 - Uri: input in it's current phase of processing

-->

<xsl:template name="cibtr:WrapSpecificBasename">

  <xsl:param name="Uri"/>

  <xsl:choose>

    <xsl:when test="not(contains($Uri, '/'))">

      <xsl:value-of select="$Uri"/>

    </xsl:when>

    <xsl:otherwise>

      <xsl:call-template name="cibtr:WrapSpecificBasename">

                        select="substring-after($Uri, '/')"/>

      </xsl:call-template>

    </xsl:otherwise>

  </xsl:choose>

</xsl:template>

 Id-mangling-enriched identity template.

 -->

<xsl:template name="cibtr:HelperIdentityLeave">

  <xsl:copy>

    <xsl:apply-templates select="@*|node()" mode="cibtr:leave"/>

  </xsl:copy>

</xsl:template>

 ACTUAL TRANSFORMATION

 Extra modes: cibtr:leave

              cibtr:leave-serialize

 -->

<xsl:variable name="cibtr:WrapSpecificPrefix">

  <xsl:call-template name="cibtr:WrapSpecificBasename">

      select="namespace-uri(document('')/xsl:stylesheet/@cibtr:filename)"/>

  </xsl:call-template>

</xsl:variable>

              select="concat('_', $cibtr:WrapSpecificPrefix, '_')"/>

 cibtr:leave-serialize mode

 -->

<xsl:template match="@*|node()" mode="cibtr:leave-serialize">

  <xsl:choose>

                    and

                    name() = 'id'">

    </xsl:when>

                    or

                    self::processing-instruction()">

      <xsl:variable name="Mark">

        <xsl:if test="count(.|../@*)=count(../@*)">A</xsl:if>

        <xsl:if test="self::processing-instruction()">P</xsl:if>

      </xsl:variable>

      <xsl:value-of select="concat($Mark, '(', name(), '=', ., '),')"/>

    </xsl:when>

    <xsl:when test="self::*">

      <xsl:value-of select="concat('E(', name(), ',')"/>

                           mode="cibtr:leave-serialize"/>

      <xsl:value-of select="'),'"/>

    </xsl:when>

    <xsl:when test="self::comment()|self::text()">

      <xsl:variable name="Mark">

        <xsl:if test="self::comment()">C</xsl:if>

        <xsl:if test="self::text()">T</xsl:if>

      </xsl:variable>

      <xsl:value-of select="concat($Mark, '(', ., '),')"/>

    </xsl:when>

  </xsl:choose>

</xsl:template>

 cibtr:leave mode

 -->

 This is to cover elements with the internal structure characterized

 with the following RelaxNG Compact encoded grammar:

 > attribute id-ref { xsd:IDREF }

 > | (attribute id { xsd:ID },

 >    (rule?

 >     & nvpair*

 >     & attribute score {

 >         xsd:integer

 >         | xsd:token "INFINITY"

 >         | xsd:token "+INFINITY"

 >         | xsd:token "-INFINITY"

 >       }?))

 The context node corresponds to "@id-ref" branch prior to unfolding

 in the preceding "unfold" XSLT counterpart, and Original to the other,

 and the task here is to recursively (and deterministically) compare

 the content of the two, and when there's a match, to collapse the

 former back to a mere empty @id-ref link.

 NOTE: name of this template may be a bit misleading, but it's meant

       to really mean "after upgrade of the same trailing numbers",

       which effectively means we are playing per 3.X CIB schema

       rules, which needs to be considered, should any element be

       renamed, etc.

 -->

                       contains(

                         concat('|cluster_property_set',

                                '|instance_attributes|',

                                '|meta_attributes|'),

                         concat('|', name(), '|')

                       )

                     ]"

              mode="cibtr:leave">

                select="//*[

                          name() = name(current())

                          and

                          @id = substring-after(current()/@id,

                                                $cibtr:WrapSpecificPrefixInitialRoot)

                        ]"/>

  <xsl:choose>

                      starts-with(@id, $cibtr:WrapSpecificPrefixInitialRoot)

                    )">

      <xsl:copy>

                             mode="cibtr:leave"/>

      </xsl:copy>

    </xsl:when>

    <xsl:when test="count($Original) = 0">

      <xsl:if test="string($cibtr:label-debug) != string(false())">

        <xsl:message>

                                       ': original element pointed to with',

                                       ' @id-ref (',

                                       substring-after(@id,

                                                       $cibtr:WrapSpecificPrefixInitialRoot),

                                       ') disappeared during upgrade')"/>

        </xsl:message>

      </xsl:if>

      <xsl:copy>

                             mode="cibtr:leave"/>

      </xsl:copy>

    </xsl:when>

    <xsl:when test="count($Original) != 1">

      <xsl:message terminate="yes">

                                     name(), ': found several elements',

                                     ' that possibly were originally',

                                     ' pointed to with @id-ref (',

                                     substring-after(@id,

                                                     $cibtr:WrapSpecificPrefixInitialRoot),

                                     '); unexpected ambiguity')"/>

      </xsl:message>

    </xsl:when>

    <xsl:otherwise>

      <xsl:variable name="SerializedOriginal">

                                     |$Original/node()"

                             mode="cibtr:leave-serialize"/>

      </xsl:variable>

      <xsl:variable name="SerializedDependant">

                                     |node()"

                             mode="cibtr:leave-serialize"/>

      </xsl:variable>

      <xsl:copy>

        <xsl:choose>

          <xsl:when test="$SerializedOriginal = $SerializedDependant">

            <xsl:attribute name="id-ref">

                                                    $cibtr:WrapSpecificPrefixInitialRoot)"/>

            </xsl:attribute>

          </xsl:when>

          <xsl:otherwise>

                                 mode="cibtr:leave">

            </xsl:apply-templates>

          </xsl:otherwise>

        </xsl:choose>

      </xsl:copy>

    </xsl:otherwise>

  </xsl:choose>

</xsl:template>

<xsl:template match="@*|node()" mode="cibtr:leave">

  <xsl:call-template name="cibtr:HelperIdentityLeave"/>

</xsl:template>

<xsl:template match="/">

  <xsl:call-template name="cibtr:HelperIdentityLeave"/>

</xsl:template>

</xsl:stylesheet>