Normalisiere file/@ID und @FILEID

src/xslt/mets.xsl

@@ -2,18 +2,24 @@
                exclude-result-prefixes="#all"
                xpath-default-namespace="http://www.loc.gov/METS/"
                xmlns="http://www.loc.gov/METS/"
+               xmlns:fun="tag:maus@hab.de,2018-02:XSLT"
+               xmlns:xlink="http://www.w3.org/1999/xlink"
+               xmlns:xs="http://www.w3.org/2001/XMLSchema"
                xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 
   <!-- Normalisiert die von Kitodo.Production erzeugte METS-Datei -->
+  <xsl:param name="objectId" as="xs:string" required="yes"/>
+
+  <xsl:key name="files" match="file" use="@ID"/>
 
   <xsl:template match="node() | @*">
     <xsl:copy><xsl:apply-templates select="node() | @*"/></xsl:copy>
   </xsl:template>
 
   <xsl:template match="mets">
-    <xsl:copy>
+    <mets OBJID="{$objectId}">
       <xsl:apply-templates/>
-    </xsl:copy>
+    </mets>
   </xsl:template>
 
   <xsl:template match="metsHdr">
@@ -24,4 +30,17 @@
     </metsHdr>
   </xsl:template>
 
+  <xsl:template match="@ID[parent::file]">
+    <xsl:attribute name="ID" select="fun:normalize-fileId(..)"/>
+  </xsl:template>
+
+  <xsl:template match="@FILEID">
+    <xsl:attribute name="FILEID" select="fun:normalize-fileId(key('files', .))"/>
+  </xsl:template>
+
+  <xsl:function name="fun:normalize-fileId" as="xs:string">
+    <xsl:param name="file" as="element(file)"/>
+    <xsl:value-of select="string-join( ('image', if ($file/../@USE) then lower-case($file/../@USE) else (), tokenize($file/FLocat/@xlink:href, '/')[last()]), '.')"/>
+  </xsl:function>
+
 </xsl:transform>