update_datenraum_nodes.py

import sys
import json

from example_taxonomies import taxonomies
from datenraum import create_datenraum_session
from utils import has_description, pick


def main(metadata_file, nodes_file):
    with open(metadata_file, "r", encoding="utf-8") as input_file:
        records = json.load(input_file)

    datenraum_nodes = {}

    with open(nodes_file, "r", encoding="utf-8") as input_file:
        nodes = json.load(input_file)

        for node in nodes:
            datenraum_nodes[node["externalId"]] = node

    session = create_datenraum_session()

    filtered_records = [record for record in records if has_description(record)]
    records = filtered_records + taxonomies

    update_session(session, records, datenraum_nodes)

    delete_deprecated_ids(session, records, datenraum_nodes)


def update_session(session, records, datenraum_nodes):
    for record in records:
        record_id = record["id"]
        datenraum_node = datenraum_nodes.get(record["id"], None)

        datenraum_amb = pick(["metadata", "Amb"], datenraum_node)

        if datenraum_node is None or datenraum_amb is None:
            print(f"INFO: Add new node for {record_id}")

            result = session.add_node(record)

            if not result:
                external_node = session.get_node_from_external_id(record["id"])
                datenraum_node_id = (
                    external_node["id"] if external_node is not None else None
                )

                if datenraum_node_id is not None:
                    print(f"INFO: Lets update node {record_id} instead")
                    print()
                    session.update_node(record, datenraum_node_id)
        else:
            # We change the `@context` before update => thus we need to
            # rechange it before checking whether an update is necessary
            datenraum_amb["@context"] = record["@context"]

            # Ignore creation and modified time of metadata
            try:
                datenraum_amb["mainEntityOfPage"][0]["dateCreated"] = record[
                    "mainEntityOfPage"
                ][0]["dateCreated"]
                datenraum_amb["mainEntityOfPage"][0]["dateModified"] = record[
                    "mainEntityOfPage"
                ][0]["dateModified"]
            except (KeyError, IndexError):
                pass

            if datenraum_amb != record:
                datenraum_node_id = datenraum_node["id"]
                print(f"INFO: Update node {datenraum_node_id} for {record_id}")

                session.update_node(record, datenraum_node_id)


def delete_deprecated_ids(session, records, datenraum_nodes):
    stored_ids = set(node["externalId"] for node in datenraum_nodes.values())
    current_ids = set(record["id"] for record in records)

    for ressource_id in stored_ids - current_ids:
        datenraum_id = datenraum_nodes[ressource_id]["id"]

        print(f"INFO: Delete node {datenraum_id}")

        session.delete_node(datenraum_id)


if __name__ == "__main__":
    if len(sys.argv) < 3:
        print("Usage: update_datenraum.py SERLO_METADATA_FILE DATENRAUM_NODES_FILE")
        sys.exit(1)

    main(sys.argv[1], sys.argv[2])