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path: root/src/hs-apprecover.cpp
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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-apprecover.h"
#include "hs-appinfo.h"
#include "hs-proxy.h"
#include "hs-clientmanager.h"


HS_AppRecover* HS_AppRecover::me = nullptr;

/**
 * screen_update event handler
 *
 * #### Parameters
 * - api : the api
 * - event : received event name
 * - object : received json object
 *
 * #### Return
 * 0 : event can transfer to others
 * 1 : event not transfer to others
 */
int on_screen_update_event(afb_api_t api, const char *event, struct json_object *object)
{
    HS_AppRecover::instance()->screenUpdated(object);
    return 0;
}

/**
 * get instance
 *
 * #### Parameters
 *  - Nothing
 *
 * #### Return
 * HS_AppRecover instance pointer
 *
 */
HS_AppRecover* HS_AppRecover::instance(void)
{
    if(me == nullptr)
        me = new HS_AppRecover();

    return me;
}

/**
 * HS_AppRecover initialize function
 *
 * #### Parameters
 *  - api : the api serving the request
 *
 * #### Return
 * 0 : init success
 * 1 : init fail
 *
 */
int HS_AppRecover::init(afb_api_t api)
{
    setEventHook("windowmanager/screenUpdated", on_screen_update_event);
    HS_WmProxy wm_proxy;
    wm_proxy.subscribe(api, HS_WmProxy::Event_ScreenUpdated);
    return 0;
}

/**
 * starting recover applications
 *
 * #### Parameters
 *  - api : the api
 *  - map : recover app map
 *
 * #### Return
 * None
 *
 */
void HS_AppRecover::startRecovery(afb_api_t api, recover_map &map)
{
    for(auto &key : HS_Config::keys_recover_type) {
        for(auto &m : map[key]){
            struct app_recover_info recover_info;
            recover_info.recover_type = key;
            recover_info.visibility = m.visibility;
            recover_info.after = m.after;
            m_recover_apps_list[m.appid] = std::move(recover_info);
            if(key == HS_Config::keys_recover_type[1]) {
                m_lastmode_list.insert(m.appid);
            }
            // recover application
            auto it = m_recovering_set.find(m.appid);
            if(it == m_recovering_set.end()) {
                m_recovering_set.insert(m.appid);
                std::string &after = m_recover_apps_list[m.appid].after;
                if(!after.empty()) {
                    auto w = m_wait_recover_set.find(m_recover_apps_list[m.appid].after);
                    if(w != m_wait_recover_set.end()) {
                        m_wait_recover_set[after].insert(m.appid);
                    }
                    else {
                        std::set<std::string> new_set;
                        new_set.insert(m.appid);
                        m_wait_recover_set[after] = std::move(new_set);
                    }
                    continue;   // don't immediately start application, wait until after applicaiton started.
                }
                startApplication(api, m.appid);
            }
        }
    }
}

/**
 * register started applications
 *
 * #### Parameters
 *  - appid : application id liked "dashboard"
 *
 * #### Return
 * false : not recover app
 * true : recover app
 * 
 */
bool HS_AppRecover::registerRecoveredApp(afb_api_t api, const std::string &appid)
{
    bool ret = false;
    if(m_recovering_set.empty()) {
        return ret;
    }

    AFB_INFO("recover appid=[%s].", appid.c_str());
    auto it = m_recovering_set.find(appid);
    if(it != m_recovering_set.end()) {
        m_recovering_set.erase(appid);
        auto ip = m_recover_apps_list.find(appid);
        if(ip != m_recover_apps_list.end()
        && ip->second.visibility) {
            HS_ClientManager::instance()->pushEvent("showWindow", nullptr, appid);
        }
        ret = true;
    }

    // check wait recover application
    auto w = m_wait_recover_set.find(appid);
    if(w != m_wait_recover_set.end()) {
        for(auto &ref : m_wait_recover_set[appid]) {
            startApplication(api, ref);
        }
        m_wait_recover_set.erase(appid);
    }
    return ret;
}

/**
 * screenUpdated event handler
 *
 * #### Parameters
 *  - obj : screenUpdate object
 *
 * #### Return
 * None
 * 
 */
void HS_AppRecover::screenUpdated(struct json_object *obj)
{
    std::set<std::string> s_mode;
    struct json_object *ids_obj;
    if(json_object_object_get_ex(obj, key_ids.c_str(), &ids_obj)) {
        if(json_object_get_type(ids_obj) == json_type_array) {
            int array_len = json_object_array_length(ids_obj);
            for (int i = 0; i < array_len; ++i) {
                struct json_object *j_id = json_object_array_get_idx(ids_obj, i);
                std::string appid = json_object_get_string(j_id);
                if(!isHomescreenApp(appid)) {
                    s_mode.insert(appid);
                }
            }
            if(!s_mode.empty()) {
                updateLastmode(s_mode);
            }
        }
        else {
            AFB_WARNING("screenUpdated list isn't array.");
        }
    }
}

/**
 * start application
 *
 * #### Parameters
 *  - api : the api
 *  - appid : application id liked "dashboard"
 *
 * #### Return
 * None
 *
 */
void HS_AppRecover::startApplication(afb_api_t api, const std::string &appid)
{
    HS_AfmMainProxy afm_proxy;
    afm_proxy.start(api,  HS_AppInfo::instance()->getAppProperty(appid, _keyId));
}

/**
 * update lastmode file
 *
 * #### Parameters
 *  - set : new lastmode set
 *
 * #### Return
 * None
 * 
 */
void HS_AppRecover::updateLastmode(std::set<std::string> &set)
{
    if(set.size() == m_lastmode_list.size()) {
        bool is_same = true;
        for(auto &m : set) {
            auto it = m_lastmode_list.find(m);
            if(it == m_lastmode_list.end()) {
                is_same = false;
                break;
            }
        }
        if(is_same) {   // lastmode aren't changed
            return;
        }
    }

    m_lastmode_list.swap(set);
    struct json_object *arr_obj = json_object_new_array();
    for(auto &it : m_lastmode_list) {
        struct json_object *j_obj = json_object_new_object();
        json_object_object_add(j_obj, HS_Config::key_appid.c_str(), json_object_new_string(it.c_str()));
        json_object_object_add(j_obj, HS_Config::key_visibility.c_str(), json_object_new_string("visible"));
        json_object_array_add(arr_obj, j_obj);
    }

    auto path = HS_Config::root_dir + "/etc/" + HS_Config::lastmode_json;
    if(writeJsonFile(path.c_str(), arr_obj) < 0) {
        AFB_ERROR("write lastmode error.");
    }
}

/**
 * judge whether app is Homescreen app
 *
 * #### Parameters
 *  - appid : application id
 *
 * #### Return
 * true : homescreen app
 * false : not homescreen app
 *
 */
bool HS_AppRecover::isHomescreenApp(const std::string &appid) const
{
    auto it = m_recover_apps_list.find(appid);
    if(it != m_recover_apps_list.end()
    && it->second.recover_type == HS_Config::keys_recover_type[0]) {
            return true;
    }
    return false;
}