qpdf/libqpdf/QPDFJob_json.cc

#include <qpdf/QPDFJob.hh>
#include <qpdf/JSONHandler.hh>

#include <memory>
#include <stdexcept>
#include <sstream>

static JSON JOB_SCHEMA = JSON::parse(QPDFJob::json_job_schema_v1().c_str());

void
QPDFJob::initializeFromJson(std::string const& json)
{
    std::list<std::string> errors;
    JSON j = JSON::parse(json);
    if (! j.checkSchema(JOB_SCHEMA, JSON::f_optional, errors))
    {
        std::ostringstream msg;
        msg << this->m->message_prefix
            << ": job json has errors:";
        for (auto const& error: errors)
        {
            msg << std::endl << "  " << error;
        }
        throw std::runtime_error(msg.str());
    }

    JSONHandler jh;
    {
        jh.addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});

        auto input = std::make_shared<JSONHandler>();
        auto input_file = std::make_shared<JSONHandler>();
        auto input_file_name = std::make_shared<JSONHandler>();
        auto output = std::make_shared<JSONHandler>();
        auto output_file = std::make_shared<JSONHandler>();
        auto output_file_name = std::make_shared<JSONHandler>();
        auto output_options = std::make_shared<JSONHandler>();
        auto output_options_qdf = std::make_shared<JSONHandler>();

        input->addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});
        input_file->addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});
        output->addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});
        output_file->addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});
        output_options->addDictHandlers(
            [](std::string const&){},
            [](std::string const&){});

        jh.addDictKeyHandler("input", input);
        input->addDictKeyHandler("file", input_file);
        input_file->addDictKeyHandler("name", input_file_name);
        jh.addDictKeyHandler("output", output);
        output->addDictKeyHandler("file", output_file);
        output_file->addDictKeyHandler("name", output_file_name);
        output->addDictKeyHandler("options", output_options);
        output_options->addDictKeyHandler("qdf", output_options_qdf);

        input_file_name->addStringHandler(
            [this](std::string const&, std::string const& v) {
                config()->inputFile(v.c_str());
            });
        output_file_name->addStringHandler(
            [this](std::string const&, std::string const& v) {
                config()->outputFile(v.c_str());
            });
        output_options_qdf->addBoolHandler(
            [this](std::string const&, bool v) {
                // QXXXQ require v to be true
                config()->qdf();
            });
    }

    // {
    //   "input": {
    //     "file": {
    //       "name": "/home/ejb/source/examples/pdf/minimal.pdf"
    //     }
    //   },
    //   "output": {
    //     "file": {
    //       "name": "/tmp/a.pdf"
    //     },
    //     "options": {
    //       "qdf": true
    //     }
    //   }
    // }

    jh.handle(".", j);
}