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/*
 * Copyright (c) 2019 TOYOTA MOTOR CORPORATION
 *
 * 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.
 */


#include "hs-config.h"

const std::array<std::string, 3> HS_Config::keys_recover_type = {   // based on hs-conf.json
    "hs-apps",
    "default-lastmode",
    "normal-apps"
};

/**
 * read configuration file to memory
 *
 * #### Parameters
 *  - Nothing
 *
 * #### Return
 * None
 *
 */
int HS_Config::readConfig(void)
{
    auto rootdir = std::string(getenv("AFM_APP_INSTALL_DIR"));
    auto path = rootdir + "/etc/" + hs_conf_json;
    if(readJsonFile(path.c_str(), &m_hs_conf) < 0) {
        AFB_ERROR("read %s failed.", hs_conf_json.c_str());
        return -1;
    }

    path = rootdir + "/etc/" + lastmode_json;
    if(readJsonFile(path.c_str(), &m_lastmode) < 0) {
        AFB_ERROR("read %s failed.", lastmode_json.c_str());
        m_lastmode = nullptr;
    }

    return parseConfig();
}

/**
 * parse configuration file contents
 *
 * #### Parameters
 *  - Nothing
 *
 * #### Return
 * 0 : success
 * 1 : fail
 *
 */
int HS_Config::parseConfig(void)
{
    struct json_object *handshake_obj, *times_obj, *sleep_obj;
    if(json_object_object_get_ex(m_hs_conf, key_handshake.c_str(), &handshake_obj)
    && json_object_object_get_ex(handshake_obj, key_times.c_str(), &times_obj)
    && json_object_object_get_ex(handshake_obj, key_sleep.c_str(), &sleep_obj)) {
        m_handshake_info.times = json_object_get_int(times_obj);
        m_handshake_info.sleep = json_object_get_int(sleep_obj);
    }
    else {
        AFB_WARNING("get handshake info error, use default value.");
    }

    struct json_object *recover_obj;
    if(json_object_object_get_ex(m_hs_conf, key_recover.c_str(), &recover_obj)) {
        for(auto &m : keys_recover_type) {
            struct json_object *obj;
            if(json_object_object_get_ex(recover_obj, m.c_str(), &obj)) {
                if(json_object_get_type(obj) != json_type_array ) {
                    continue;
                }
                m_recover_map[m] = std::move(getRecoverAppInfo(obj));
            }
        }

        if(m_recover_map.empty()) {
            AFB_ERROR("get homescreen recover list failed.");
            return -1;
        }
    }
    else {
        AFB_ERROR("get homescreen recover object failed.");
        return -1;
    }

    if(json_object_get_type(m_lastmode) == json_type_array ) {
        struct std::vector<recover_app_info> v_lastmode = std::move(getRecoverAppInfo(m_lastmode));
        if(!v_lastmode.empty()) {   // got saving lastmode isn't null, instead of default lastmode
            m_recover_map[keys_recover_type[1]] = std::move(v_lastmode);
        }
    }

    return 0;
}

/**
 * get recover application information
 * appid, visibility
 *
 * #### Parameters
 *  - obj : application information
 *
 * #### Return
 * recover_app_info vector
 *
 */
std::vector<struct recover_app_info> HS_Config::getRecoverAppInfo(struct json_object *obj)
{
    int array_len = json_object_array_length(obj);
    std::vector<struct recover_app_info> v_app_info;
    for (int i = 0; i < array_len; ++i) {
        struct json_object *info_obj = json_object_array_get_idx(obj, i);
        struct recover_app_info info;
        struct json_object *value_obj;
        if(json_object_object_get_ex(info_obj, key_appid.c_str(), &value_obj)) {
            info.appid = json_object_get_string(value_obj);
        }
        else {
            AFB_ERROR("recover infomation doesn't include appid.");
            v_app_info.clear();
            return v_app_info;
        }
        if(json_object_object_get_ex(info_obj, key_visibility.c_str(), &value_obj)) {
            std::string visibility = json_object_get_string(value_obj);
            info.visibility = (visibility == "visible") ? true:false;
        }
        else {
            info.visibility = false;
        }
        v_app_info.push_back(info);
    }

    return v_app_info;
}