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/*
 * Copyright (C) 2008-2020, Juick
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.juick.www.api;

import com.juick.model.Chat;
import com.juick.model.Message;
import com.juick.model.User;
import com.juick.model.AnonymousUser;
import com.juick.model.PrivateChats;
import com.juick.util.HttpBadRequestException;
import com.juick.util.HttpForbiddenException;
import com.juick.util.WebUtils;
import com.juick.www.WebApp;
import com.juick.service.ChatService;
import com.juick.service.UserService;
import com.juick.service.component.SystemEvent;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.*;

import javax.inject.Inject;
import java.util.Collections;
import java.util.List;

/**
 * @author ugnich
 */
@RestController
public class PM {
    @Inject
    private UserService userService;
    @Inject
    private ChatService chatService;
    @Inject
    private ApplicationEventPublisher applicationEventPublisher;
    @Inject
    private WebApp webApp;

    @RequestMapping(value = "/api/pm", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public List<Message> doGetPM(
            @ModelAttribute User visitor,
            @RequestParam(required = false) String uname) {
        int uid = 0;
        if (uname != null && uname.matches("^[a-zA-Z0-9\\-]{2,16}$")) {
            uid = userService.getUIDbyName(uname);
        }

        if (uid == 0) {
            throw new HttpBadRequestException();
        }

        List<Message> msgs = chatService.getChat(visitor.getUid(), uid);
        msgs.forEach(m -> m.getUser().setAvatar(webApp.getAvatarUrl(m.getUser())));
        return msgs;
    }

    @RequestMapping(value = "/api/pm", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
    public Message doPostPM(
            @ModelAttribute User visitor,
            @RequestParam String uname,
            @RequestParam String body) {
        User userTo = AnonymousUser.INSTANCE;
        if (WebUtils.isUserName(uname)) {
            userTo = userService.getUserByName(uname);
        }

        if (userTo.getUid() == 0 || body == null || body.length() < 1 || body.length() > 10240) {
            throw new HttpBadRequestException();
        }

        if (userService.isInBLAny(userTo.getUid(), visitor.getUid())) {
            throw new HttpForbiddenException();
        }

        if (chatService.createMessage(visitor.getUid(), userTo.getUid(), body)) {
            Message jmsg = new Message();
            jmsg.setUser(visitor);
            jmsg.setText(body);
            jmsg.setTo(userTo);
            jmsg.getUser().setAvatar(webApp.getAvatarUrl(jmsg.getUser()));
            applicationEventPublisher.publishEvent(
                    new SystemEvent(this,
                            SystemActivity.message(jmsg.getUser(), jmsg, Collections.singletonList(jmsg.getTo()))));
            return jmsg;

        }
        throw new HttpBadRequestException();
    }
    @RequestMapping(value = "/api/groups_pms", method = RequestMethod.GET, produces = MediaType.APPLICATION_JSON_VALUE)
    public PrivateChats doGetGroupsPMs(
            @ModelAttribute User visitor,
            @RequestParam(defaultValue = "5") int cnt) {
        // TODO: ignore cnt param for now but make sure paging param will not be cnt

        List<Chat> lastconv = chatService.getLastChats(visitor);
        lastconv.forEach(c -> c.setAvatar(webApp.getAvatarUrl(c)));
        PrivateChats pms = new PrivateChats();
        pms.setUsers(lastconv);
        return pms;
    }
}