OpenSpace/modules/kameleonvolume/tasks/kameleondocumentationtask.cpp

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 *                                                                                       *
 * OpenSpace                                                                             *
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 * Copyright (c) 2014-2017                                                               *
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#include <modules/kameleonvolume/tasks/kameleondocumentationtask.h>

#include <modules/kameleonvolume/kameleonvolumereader.h>

#include <openspace/openspace.h>
#include <openspace/documentation/verifier.h>

#include <ghoul/misc/dictionaryjsonformatter.h>
#include <ghoul/filesystem/filesystem.h>

#include <string>
#include <fstream>

namespace {
    const char* KeyInput = "Input";
    const char* KeyOutput = "Output";
    const char* MainTemplateFilename = "${OPENSPACE_DATA}/web/kameleondocumentation/main.hbs";
    const char* HandlebarsFilename = "${OPENSPACE_DATA}/web/common/handlebars-v4.0.5.js";
    const char* JsFilename = "${OPENSPACE_DATA}/web/kameleondocumentation/script.js";
    const char* BootstrapFilename = "${OPENSPACE_DATA}/web/common/bootstrap.min.css";
    const char* CssFilename = "${OPENSPACE_DATA}/web/common/style.css";
} // namespace

namespace openspace {

KameleonDocumentationTask::KameleonDocumentationTask(const ghoul::Dictionary& dictionary) {
    openspace::documentation::testSpecificationAndThrow(
        documentation(),
        dictionary,
        "KameleonDocumentationTask"
    );

    _inputPath = absPath(dictionary.value<std::string>(KeyInput));
    _outputPath = absPath(dictionary.value<std::string>(KeyOutput));
}

std::string KameleonDocumentationTask::description() {
    return "Extract metadata from cdf-file " + _inputPath +
        " and output html documentation to " + _outputPath;
}

void KameleonDocumentationTask::perform(const Task::ProgressCallback & progressCallback) {
    KameleonVolumeReader reader(_inputPath);
    ghoul::Dictionary kameleonDictionary = reader.readMetaData();
    progressCallback(0.33f);
    ghoul::DictionaryJsonFormatter formatter;


    ghoul::Dictionary dictionary = {
        {"kameleon", std::move(kameleonDictionary)},
        {"version",
            std::to_string(OPENSPACE_VERSION_MAJOR) + "." +
            std::to_string(OPENSPACE_VERSION_MINOR) + "." +
            std::to_string(OPENSPACE_VERSION_PATCH)
        },
        {"input", _inputPath}
    };

    std::string json = formatter.format(dictionary);
    progressCallback(0.66f);

    std::ifstream handlebarsInput(absPath(HandlebarsFilename));
    std::ifstream jsInput(absPath(JsFilename));

    std::string jsContent;
    std::back_insert_iterator<std::string> jsInserter(jsContent);

    std::copy(std::istreambuf_iterator<char>{handlebarsInput}, std::istreambuf_iterator<char>(), jsInserter);
    std::copy(std::istreambuf_iterator<char>{jsInput}, std::istreambuf_iterator<char>(), jsInserter);

    std::ifstream bootstrapInput(absPath(BootstrapFilename));
    std::ifstream cssInput(absPath(CssFilename));

    std::string cssContent;
    std::back_insert_iterator<std::string> cssInserter(cssContent);

    std::copy(std::istreambuf_iterator<char>{bootstrapInput}, std::istreambuf_iterator<char>(), cssInserter);
    std::copy(std::istreambuf_iterator<char>{cssInput}, std::istreambuf_iterator<char>(), cssInserter);

    std::ifstream mainTemplateInput(absPath(MainTemplateFilename));
    std::string mainTemplateContent{ std::istreambuf_iterator<char>{mainTemplateInput},
        std::istreambuf_iterator<char>{}};

    std::ofstream file;
    file.exceptions(~std::ofstream::goodbit);
    file.open(_outputPath);

     std::stringstream html;
        html << "<!DOCTYPE html>\n"
            << "<html>\n"
            << "\t<head>\n"
            << "\t\t<script id=\"mainTemplate\" type=\"text/x-handlebars-template\">\n"
            << mainTemplateContent << "\n"
            << "\t\t</script>\n"
            << "\t\t<script id=\"data\" type=\"application/json\">\n"
            << json << "\n"
            << "\t</script>\n"
            << "\t<script>\n"
            << jsContent << "\n"
            << "\t</script>\n"
            << "\t<style type=\"text/css\">\n"
            << cssContent << "\n"
            << "\t</style>\n"
            << "\t\t<title>Documentation</title>\n"
            << "\t</head>\n"
            << "\t<body>\n"
            << "\t</body>\n"
            << "</html>\n";

    file << html.str();

    progressCallback(1.0f);
}

documentation::Documentation KameleonDocumentationTask::documentation() {
    using namespace documentation;
    return {
        "KameleonDocumentationTask",
        "kameleon_documentation_task",
        {
            {
                "Type",
                new StringEqualVerifier("KameleonDocumentationTask"),
                Optional::No,
                "The type of this task"
            },
            {
                KeyInput,
                new StringAnnotationVerifier("A file path to a cdf file"),
                Optional::No,
                "The cdf file to extract data from"
            },
            {
                KeyOutput,
                new StringAnnotationVerifier("A valid filepath"),
                Optional::No,
                "The html file to write documentation to"
            }
        }
    };
}

} // namespace openspace