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A web service test double for all occasions
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/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * 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 com.github.tomakehurst.wiremock.standalone;

import com.github.tomakehurst.wiremock.client.ResponseDefinitionBuilder;
import com.github.tomakehurst.wiremock.client.WireMock;
import com.github.tomakehurst.wiremock.common.BinaryFile;
import com.github.tomakehurst.wiremock.common.ContentTypes;
import com.github.tomakehurst.wiremock.common.FileSource;
import com.github.tomakehurst.wiremock.common.TextFile;
import com.github.tomakehurst.wiremock.http.ContentTypeHeader;
import com.github.tomakehurst.wiremock.http.HttpHeaders;
import com.github.tomakehurst.wiremock.stubbing.StubMapping;

import static com.github.tomakehurst.wiremock.core.WireMockApp.FILES_ROOT;
import static com.github.tomakehurst.wiremock.core.WireMockApp.MAPPINGS_ROOT;
import static com.github.tomakehurst.wiremock.common.AbstractFileSource.byFileExtension;
import static com.google.common.collect.Iterables.filter;
import static org.apache.commons.lang3.StringUtils.substringAfterLast;

public class RemoteMappingsLoader {

    private final FileSource mappingsFileSource;
    private final FileSource filesFileSource;
    private final WireMock wireMock;

    public RemoteMappingsLoader(FileSource fileSource, WireMock wireMock) {
        this.mappingsFileSource = fileSource.child(MAPPINGS_ROOT);
        this.filesFileSource = fileSource.child(FILES_ROOT);
        this.wireMock = wireMock;
    }

    public void load() {
        Iterable mappingFiles = filter(mappingsFileSource.listFilesRecursively(), byFileExtension("json"));
        for (TextFile mappingFile : mappingFiles) {
            StubMapping mapping = StubMapping.buildFrom(mappingFile.readContentsAsString());
            convertBodyFromFileIfNecessary(mapping);
            wireMock.register(mapping);
        }
    }

    private void convertBodyFromFileIfNecessary(StubMapping mapping) {
        String bodyFileName = mapping.getResponse().getBodyFileName();
        if (bodyFileName != null) {
            ResponseDefinitionBuilder responseDefinitionBuilder = ResponseDefinitionBuilder
                .like(mapping.getResponse())
                .withBodyFile(null);

            String extension = substringAfterLast(bodyFileName, ".");
            String mimeType = getMimeType(mapping);

            if (ContentTypes.determineIsText(extension, mimeType)) {
                TextFile bodyFile = filesFileSource.getTextFileNamed(bodyFileName);
                responseDefinitionBuilder.withBody(bodyFile.readContentsAsString());
            } else {
                BinaryFile bodyFile = filesFileSource.getBinaryFileNamed(bodyFileName);
                responseDefinitionBuilder.withBody(bodyFile.readContents());
            }

            mapping.setResponse(responseDefinitionBuilder.build());
        }
    }

    private String getMimeType(StubMapping mapping) {
        HttpHeaders responseHeaders = mapping.getResponse().getHeaders();
        if (responseHeaders != null) {
            ContentTypeHeader contentTypeHeader = responseHeaders.getContentTypeHeader();
            return contentTypeHeader != null ? contentTypeHeader.mimeTypePart() : null;
        }

        return null;
    }

}