From 464c140210fed14006c80219215731aac5dd4ffc Mon Sep 17 00:00:00 2001
From: Pierre Choffet <peuc@wanadoo.fr>
Date: Tue, 11 Jan 2022 15:56:33 -0500
Subject: [PATCH] Add replace_id.xslt

This stylesheet can be used to replace a wdef:id value by another. It will replace references to the element at the same time.
---
 README                |  3 +++
 xslts/replace_id.xslt | 59 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+)
 create mode 100644 xslts/replace_id.xslt

diff --git a/README b/README
index 0368030..9006401 100644
--- a/README
+++ b/README
@@ -24,3 +24,6 @@ Description of the provided tools:
 
   - xslts/canonicalize.xslt
     Return a wdef under its normal form.
+
+  - xslts/replace_id.xslt
+    Change the wdef:id of an element and its references.
diff --git a/xslts/replace_id.xslt b/xslts/replace_id.xslt
new file mode 100644
index 0000000..774422a
--- /dev/null
+++ b/xslts/replace_id.xslt
@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<xsl:stylesheet version="1.0" xmlns:wdef="https://purl.choffet.net/wdef"
+                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
+<!-- replace_id.xslt - Replace wdef id value while keeping references in sync.
+     Copyright (C) 2020, 2021, 2022  Pierre Choffet
+
+     This program is free software: you can redistribute it and/or modify
+     it under the terms of version 3 of the GNU General Public License as
+     published by the Free Software Foundation.
+
+     This program is distributed in the hope that it will be useful,
+     but WITHOUT ANY WARRANTY; without even the implied warranty of
+     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+     GNU General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program.  If not, see <http://www.gnu.org/licenses/>.
+     -->
+	<xsl:output method="xml" encoding="utf-8" />
+	
+	<xsl:param name="old-id" />
+	<xsl:param name="new-id" />
+	
+	<xsl:template match="@*">
+		<xsl:copy>
+			<xsl:apply-templates select="@*" />
+		</xsl:copy>
+	</xsl:template>
+	
+	<xsl:template match="node()">
+		<xsl:copy>
+			<xsl:choose>
+				<xsl:when test="not(@wdef:id) or @wdef:id != $old-id">
+					<xsl:apply-templates select="node()|@*" />
+				</xsl:when>
+				<xsl:otherwise>
+					<xsl:apply-templates select="@*" />
+					<xsl:attribute name="wdef:id">
+						<xsl:value-of select="$new-id" />
+					</xsl:attribute>
+					<xsl:apply-templates select="node()" />
+				</xsl:otherwise>
+			</xsl:choose>
+		</xsl:copy>
+	</xsl:template>
+	
+	<xsl:template match="wdef:ref-element">
+		<xsl:copy>
+			<xsl:choose>
+				<xsl:when test=". = $old-id">
+					<xsl:value-of select="$new-id" />
+				</xsl:when>
+				<xsl:otherwise>
+					<xsl:apply-templates select="node()|@*" />
+				</xsl:otherwise>
+			</xsl:choose>
+		</xsl:copy>
+	</xsl:template>
+</xsl:stylesheet>
-- 
2.47.0