Migration 1 -> 2

[#assign sourceSets = {
    "1280": resizerfn.getCompleteLink(content.image!, 1400, 0)!,
    "1024": resizerfn.getCompleteLink(content.image!, 1280, 0)!,
    "768": resizerfn.getCompleteLink(content.image!, 1024, 0)!,
    "1": resizerfn.getCompleteLink(content.image!, 767, 0)!
}]

[@sizerImage sourceSets=sourceSets alt=(content.image.altText)! lazy=true/]

[#macro sizerImage sourceSets alt="" cssClass="cover" lazy=false]
    <picture class="${cssClass}">
        [#list sourceSets as size, sourceSet]
            <source media='(min-width: ${size!"1"}px)' srcset='${sourceSet}?imageFormat=webp' type="image/webp"/>
            <source media='(min-width: ${size!"1"}px)' srcset='${sourceSet}?imageFormat=jpg' type="image/jpeg"/>
        [/#list]
        <img src='${sourceSets?values?last}?imageFormat=jpg' alt='${alt!}' loading='${lazy?then("lazy", "eager")}'/>
    </picture>
[/#macro]

import groovy.transform.Field
import info.magnolia.jcr.predicate.AbstractPredicate
import info.magnolia.jcr.util.NodeTypes
import info.magnolia.jcr.util.NodeUtil
import info.magnolia.repository.RepositoryConstants
import org.apache.commons.lang.StringUtils

import javax.jcr.*

@Field final List<String> propertyNames = List.of(
        "damID",
        "focusHorizontal",
        "focusVertical",
        "altText"
)
@Field final String delimiter = "___";

// true to save changes in repo
@Field final boolean save = true

final String oldAssetSuffix = delimiter + "damID";
println("oldAssetSuffix=${oldAssetSuffix}")
final Session session = ctx.getJCRSession(RepositoryConstants.WEBSITE);
session.refresh(false)
final Iterable<Node> components = NodeUtil.collectAllChildren(session.getRootNode(), new AbstractPredicate<Node>() {
    @Override
    public boolean evaluateTyped(final Node node) {
        try {
            final String name = node.getPrimaryNodeType().getName();
            if (NodeTypes.Component.NAME == name) {
                return true;
            }
            if (NodeTypes.Page.NAME == name) {
                return true;
            }
            if (NodeTypes.Area.NAME == name) {
                return true;
            }
        } catch (RepositoryException ignored) {
        }
        return false;
    }
});
for (final Node component : components) {
    final PropertyIterator properties = component.getProperties();
    int i = 0;
    while (properties.hasNext()) {
        final Property property = properties.nextProperty();
        if (property.isModified()) {
            // observed already migrated (changed) properties being iterated over again (2x node from collectAll??)
            // skip in this case...
            continue;
        }
        if (property.getName().endsWith(oldAssetSuffix)) {
            final String currentName = StringUtils.substringBefore(property.getName(), oldAssetSuffix);
            moveProperties(component, currentName);
            if (save && ++i % 100 == 0) {
                session.save()
            }
        }
    }
}

def moveProperties(final Node component, final String name) {
    try {
        if (!component.hasNode(name)) {
            final Node holder = component.addNode(name, NodeTypes.ContentNode.NAME);
            for (String propertyName : propertyNames) {
                if (component.hasProperty(name + delimiter + propertyName)) {
                    Property oldProperty = component.getProperty(name + delimiter + propertyName);
                    holder.setProperty(propertyName, oldProperty.getValue());
                    oldProperty.remove();
                }
            }
        } else {
            println("can't migrate property in ${component.getPath()} because of name collision, node '${name}' already exists");
        }
    } catch (RepositoryException e) {
        println("Error: " + e.getMessage());
    }
}

if (save) session.save();
println("done")