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Proximax P2P File Storage Java SDK (NIS1 Compatible)
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/*
 * Copyright 2018 ProximaX Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.proximax.xpx.service;

import io.proximax.xpx.exceptions.DeletePinnedContentFailureException;
import io.proximax.xpx.exceptions.UploadContentFailureException;
import io.proximax.xpx.service.intf.UploadApi;
import io.proximax.xpx.service.model.buffers.ResourceHashMessage;
import org.apache.commons.codec.binary.Base64;

import java.nio.ByteBuffer;

import static java.lang.String.format;

public class UploadDelegate {

    private UploadApi uploadApi;

    public UploadDelegate(UploadApi uploadApi) {
        this.uploadApi = uploadApi;
    }

    public ResourceHashMessageWrapper uploadBinaryToIpfs(
            byte[] binaryData, String name, String contentType, String keywords, String metadata) {

        try {
            final byte[] resourceHashMessageData = uploadApi.uploadBytesBinary(binaryData, name, contentType, keywords, metadata);
            return new ResourceHashMessageWrapper(resourceHashMessageData);
        } catch (Exception e) {
            throw new UploadContentFailureException("Failed to upload text to ipfs", e);
        }
    }

    public ResourceHashMessageWrapper uploadTextToIpfs (
            byte[] textInBytes, String name, String contentType, String encoding, String keywords, String metadata) {

        try {
            final byte[] resourceHashMessageData = uploadApi.uploadText(textInBytes, name, contentType, encoding, keywords, metadata);
            return new ResourceHashMessageWrapper(resourceHashMessageData);
        } catch (Exception e) {
            throw new UploadContentFailureException("Failed to upload text to ipfs", e);
        }
    }

    public ResourceHashMessageWrapper uploadPathToIpfs(String path, String name, String keywords, String metadata) {

        try {
            final byte[] resourceHashMessageData = uploadApi.uploadPath(path, name, keywords, metadata);
            return new ResourceHashMessageWrapper(resourceHashMessageData);
        } catch (Exception e) {
            throw new UploadContentFailureException("Failed to upload text to ipfs", e);
        }
    }

    public String deletePinnedContent(String multihash) {
        try {
            return uploadApi.deletePinnedContent(multihash);
        } catch (Exception e) {
            throw new DeletePinnedContentFailureException(format("Failed to delete pinned content for %s", multihash), e);
        }
    }

    public static class ResourceHashMessageWrapper {

        private final byte[] data;
        private final ResourceHashMessage resourceHashMessage;

        public ResourceHashMessageWrapper(byte[] data) {
            this.data = data;
            this.resourceHashMessage = toResourceHashMessage(data);
        }

        public byte[] getData() {
            return data;
        }

        public ResourceHashMessage getResourceHashMessage() {
            return resourceHashMessage;
        }

        private ResourceHashMessage toResourceHashMessage(byte[] data) {
            return ResourceHashMessage.getRootAsResourceHashMessage(ByteBuffer.wrap(Base64.decodeBase64(data)));
        }
    }
}