001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2024-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.core.thing;
019
020import dev.enola.data.ProviderFromIRI;
021import dev.enola.data.iri.template.URITemplateMatcherChain;
022import dev.enola.thing.proto.Thing;
023import dev.enola.thing.proto.Things;
024import dev.enola.thing.repo.ThingProvider;
025
026/**
027 * ThingConnectorsProvider implements {@link ThingProvider} by delegating to a list of {@link
028 * ThingConnector}.
029 */
030public class ThingConnectorsProvider
031        implements ProviderFromIRI<Thing> /* TODO implements ThingProvider ? */ {
032
033    // TODO Align the overlap this has with EnolaThingProvider & EnolaServiceRegistry
034
035    private final URITemplateMatcherChain<ThingConnector> matcher;
036
037    public ThingConnectorsProvider(Iterable<ThingConnector> connectors) {
038        var builder = URITemplateMatcherChain.<ThingConnector>builder();
039        for (var connector : connectors) {
040            builder.add(connector.iri(), connector);
041        }
042
043        this.matcher = builder.build();
044    }
045
046    @Override
047    public Thing get(String iri) {
048        var opt = matcher.match(iri);
049        if (opt.isEmpty()) throw new IllegalArgumentException("No template matched: " + iri);
050
051        var entry = opt.get();
052        var thingConnector = entry.getKey();
053        var parameters = entry.getValue();
054
055        var thingsBuilder = Things.newBuilder();
056        thingConnector.augment(thingsBuilder, iri, parameters);
057        // TODO The get(0) is wrong, we need to return Things here, and UI needs to show all
058        return thingsBuilder.build().getThings(0);
059    }
060}