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/*
 * Copyright (C) 2008-2017, 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.controllers;

import com.juick.Status;
import com.juick.Tag;
import com.juick.User;
import com.juick.server.helpers.AnonymousUser;
import com.juick.server.util.*;
import com.juick.service.*;
import com.juick.util.MessageUtils;
import com.juick.www.WebApp;
import org.apache.commons.lang3.StringUtils;
import org.apache.commons.text.StringEscapeUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;
import rocks.xmpp.addr.Jid;
import rocks.xmpp.core.stanza.model.Message;
import rocks.xmpp.extensions.component.accept.ExternalComponent;
import rocks.xmpp.extensions.nick.model.Nickname;
import rocks.xmpp.extensions.oob.model.x.OobX;

import javax.inject.Inject;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.List;
import java.util.stream.Collectors;

/**
 * @author Ugnich Anton
 */
@Controller
public class NewMessage {

    @Inject
    private TagService tagService;
    @Inject
    private MessagesService messagesService;
    @Inject
    private UserService userService;
    @Inject
    private SubscriptionService subscriptionService;
    @Inject
    private CrosspostService crosspostService;
    @Inject
    private PMQueriesService pmQueriesService;
    @Inject
    private WebApp webApp;
    @Inject
    private ExternalComponent xmpp;
    @Value("${img_path:#{systemEnvironment['TEMP'] ?: '/tmp'}}")
    private String imgDir;
    @Value("${upload_tmp_dir:#{systemEnvironment['TEMP'] ?: '/tmp'}}")
    private String tmpDir;

    private static final Logger logger = LoggerFactory.getLogger(NewMessage.class);

    @GetMapping("/post")
    protected String postAction(@RequestParam(required = false) String body, ModelMap model) throws IOException {
        com.juick.User visitor = UserUtils.getCurrentUser();
        model.addAttribute("title", "Написать");
        model.addAttribute("headers", "");
        model.addAttribute("visitor", visitor);
        if (body == null) {
            body = StringUtils.EMPTY;
        } else {
            if (body.length() > 4096) {
                body = body.substring(0, 4096);
            }
            body = StringEscapeUtils.escapeHtml4(body);
        }
        model.addAttribute("body", body);
        model.addAttribute("visitor", visitor);
        model.addAttribute("tags", tagService.getUserTagStats(visitor.getUid()).stream()
                .sorted((e1, e2) -> Integer.compare(e2.getUsageCount(), e1.getUsageCount())).map(t -> t.getTag().getName()).collect(Collectors.toList()));
        return "views/post";
    }

    @PostMapping("/post")
    public String postResult(@RequestParam(required = false) String img,
                              @RequestParam(required = false, defaultValue = StringUtils.EMPTY) String body,
                              @RequestParam(required = false, name = "tags") String tagsStr,
                              @RequestParam(required = false) MultipartFile attach, ModelMap model) throws IOException {
        com.juick.User visitor = UserUtils.getCurrentUser();
        if ((StringUtils.isEmpty(body) || body.length() > 4096) && StringUtils.isEmpty(img) && attach == null) {
            throw new HttpBadRequestException();
        }
        body = body.replace("\r", StringUtils.EMPTY);

        List<Tag> tags = webApp.parseTags(tagsStr);

        String attachmentFName = HttpUtils.receiveMultiPartFile(attach, tmpDir);

        if (StringUtils.isBlank(attachmentFName) && StringUtils.isNotBlank(img)) {
            try {
                URL imgUrl = new URL(img);
                attachmentFName = HttpUtils.downloadImage(imgUrl, tmpDir);
            } catch (Exception e) {
                logger.error("DOWNLOAD ERROR", e);
                throw new HttpBadRequestException();
            }
        }

        String attachmentType = StringUtils.isNotEmpty(attachmentFName) ? attachmentFName.substring(attachmentFName.length() - 3) : null;
        int mid = messagesService.createMessage(visitor.getUid(), body, attachmentType, tags);
        subscriptionService.subscribeMessage(mid, visitor.getUid());

        Message xmsg = new Message();
        xmsg.setFrom(Jid.of("juick@juick.com"));
        xmsg.setType(Message.Type.CHAT);
        xmsg.setThread("juick-" + mid);
        com.juick.Message jmsg = messagesService.getMessage(mid);
        xmsg.addExtension(jmsg);
        xmsg.addExtension(new Nickname("@" + jmsg.getUser().getName()));

        if (StringUtils.isNotEmpty(attachmentFName)) {
            String fname = mid + "." + attachmentType;
            String attachmentURL = "http://i.juick.com/photos-1024/" + fname;

            ImageUtils.saveImageWithPreviews(attachmentFName, fname, tmpDir, imgDir);

            body = attachmentURL + "\n" + body;
            try {
                xmsg.addExtension(new OobX(new URI(attachmentURL)));
            } catch (URISyntaxException e) {
                logger.warn("invalid uri: {} exception {}", attachmentURL, e);
            }
        }
        if (xmpp.isConnected()) {

            xmsg.setBody("@" + jmsg.getUser().getName() + ":" + MessageUtils.getTagsString(jmsg) + "\n" + body + "\n\n#" + mid + " http://juick.com/" + mid);

            xmsg.setTo(Jid.of("juick@s2s.juick.com"));
            xmpp.send(xmsg);

            xmsg.setTo(Jid.of("jubo@nologin.ru"));
            xmpp.send(xmsg);
        } else {
            logger.warn("XMPP unavailable");
        }

        //

        model.addAttribute("title", "Сообщение опубликовано");
        model.addAttribute("visitor", visitor);
        model.addAttribute("user", visitor);

        String hashtags = StringUtils.EMPTY;
        String tagscomma = StringUtils.EMPTY;
        for (int i = 0; i < jmsg.getTags().size(); i++) {
            if (i > 0) {
                hashtags += " ";
                tagscomma += ",";
            }
            hashtags += "#" + jmsg.getTags().get(i);
            tagscomma += jmsg.getTags().get(i);
        }

        model.addAttribute("url", "http://juick.com/" + mid);

        if (!crosspostService.getTwitterToken(visitor.getUid()).isPresent()) {
            String sharetwi = hashtags + " " + body;
            if (sharetwi.length() > 115) {
                sharetwi = sharetwi.substring(0, 114) + "…";
            }
            sharetwi += " http://juick.com/" + mid;
            model.addAttribute("sharetwi", sharetwi);
        }
        if (!crosspostService.getFacebookTokens(visitor.getUid()).isPresent()) {
            model.addAttribute("facebook", 1);
        }
        model.addAttribute("tags", tagService.getUserTagStats(visitor.getUid()).stream()
                .sorted((e1, e2) -> Integer.compare(e2.getUsageCount(), e1.getUsageCount())).map(t -> t.getTag().getName()).collect(Collectors.toList()));
            return "views/post_success";
    }

    @PostMapping("/comment")
    public String doPostComment(
            @RequestParam Integer mid,
            @RequestParam(required = false, defaultValue = "0") Integer rid,
            @RequestParam(required = false, defaultValue = StringUtils.EMPTY) String body,
            @RequestParam(required = false, defaultValue = StringUtils.EMPTY) String img,
            @RequestParam(required = false) MultipartFile attach) throws IOException {
        com.juick.User visitor = UserUtils.getCurrentUser();
        com.juick.Message msg = messagesService.getMessage(mid);
        if (msg == null) {
            throw new HttpNotFoundException();
        }

        com.juick.Message reply = null;
        if (rid > 0) {
            reply = messagesService.getReply(mid, rid);
            if (reply == null) {
                throw new HttpNotFoundException();
            }
        }

        if ((StringUtils.isEmpty(body) || body.length() > 4096) && StringUtils.isEmpty(img) && attach == null) {
            throw new HttpBadRequestException();
        }
        body = body.replace("\r", StringUtils.EMPTY);

        if ((msg.ReadOnly && msg.getUser().getUid() != visitor.getUid())
                || userService.isInBLAny(msg.getUser().getUid(), visitor.getUid())
                || (reply != null && userService.isInBLAny(reply.getUser().getUid(), visitor.getUid()))) {
            throw new HttpForbiddenException();
        }

        String attachmentFName = HttpUtils.receiveMultiPartFile(attach, tmpDir);

        if (StringUtils.isBlank(attachmentFName) && img != null && img.length() > 10) {
            try {
                URL imgUrl = new URL(img);
                attachmentFName = HttpUtils.downloadImage(imgUrl, tmpDir);
            } catch (Exception e) {
                logger.error("DOWNLOAD ERROR", e);
                throw new HttpBadRequestException();
            }
        }

        String attachmentType = StringUtils.isNotEmpty(attachmentFName) ? attachmentFName.substring(attachmentFName.length() - 3) : null;
        int ridnew = messagesService.createReply(mid, rid, visitor.getUid(), body, attachmentType);
        subscriptionService.subscribeMessage(mid, visitor.getUid());

        Message xmsg = new Message();
        xmsg.setFrom(Jid.of("juick@juick.com"));
        xmsg.setType(Message.Type.CHAT);
        xmsg.setThread("juick-" + mid);

        com.juick.Message jmsg = messagesService.getReply(mid, ridnew);
        xmsg.addExtension(jmsg);

        String quote = reply != null ? StringUtils.defaultString(reply.getText())
                : StringUtils.defaultString(msg.getText());
        if (quote.length() >= 50) {
            quote = quote.substring(0, 47) + "...";
        }
        xmsg.addExtension(new Nickname("@" + jmsg.getUser().getName()));

        if (StringUtils.isNotEmpty(attachmentFName)) {
            String fname = mid + "-" + ridnew + "." + attachmentType;
            String attachmentURL = "http://i.juick.com/photos-1024/" + fname;

            ImageUtils.saveImageWithPreviews(attachmentFName, fname, tmpDir, imgDir);

            body = attachmentURL + "\n" + body;
            try {
                xmsg.addExtension(new OobX(new URI(attachmentURL)));
            } catch (URISyntaxException e) {
                logger.warn("invalid uri: {}, exception {}", attachmentURL, e);
            }
        }

        if (xmpp.isConnected()) {

            xmsg.setBody("Reply by @" + jmsg.getUser().getName() + ":\n>" + quote + "\n" + body + "\n\n#" +
                    mid + "/" + ridnew + " http://juick.com/" + mid + "#" + ridnew);

            xmsg.setTo(Jid.of("juick@s2s.juick.com"));
            xmpp.send(xmsg);
        } else {
            logger.warn("XMPP unavailable");
        }

        return "redirect:/" + msg.getUser().getName() + "/" + mid + "#" + ridnew;
    }

    @PostMapping("/pm/send")
    public String doPostPM(@RequestParam(name = "uname", required = false) String unameParam,
                           @RequestParam String body) throws IOException {
        com.juick.User visitor = UserUtils.getCurrentUser();
        if (visitor.getUid() == 0 || visitor.isBanned()) {
            throw new HttpForbiddenException();
        }
        String uname = unameParam;
        if (uname.startsWith("@")) {
            uname = uname.substring(1);
        }
        User userTo = AnonymousUser.INSTANCE;
        if (WebUtils.isUserName(uname)) {
            userTo = userService.getUserByName(uname);
        }

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

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

        if (pmQueriesService.createPM(visitor.getUid(), userTo.getUid(), body)) {
            if (xmpp.isConnected()) {
                Message msg = new Message();
                msg.setFrom(Jid.of("juick@juick.com"));
                msg.setTo(Jid.of("pm@s2s.juick.com"));
                com.juick.Message jmsg = new com.juick.Message();
                jmsg.setUser(visitor);
                jmsg.setText(body);
                jmsg.setTo(userTo);
                msg.addExtension(jmsg);
                xmpp.send(msg);
            } else {
                logger.warn("XMPP unavailable");
            }
            return "redirect:/pm/sent";
        } else {
            throw new HttpBadRequestException();
        }
    }
    @PostMapping("/post2")
    public String doPostMessage(@RequestParam(name = "body", required = false) String bodyParam,
                                @RequestParam(required = false) String img,
                                @RequestParam(required = false) String referer,
                                @RequestParam(required = false) MultipartFile attach) throws IOException {

        com.juick.User visitor = UserUtils.getCurrentUser();
        if (visitor.getUid() == 0 || visitor.isBanned()) {
            throw new HttpForbiddenException();
        }
        String body = bodyParam.replace("\r", StringUtils.EMPTY);

        String attachmentFName = HttpUtils.receiveMultiPartFile(attach, tmpDir);

        if (StringUtils.isBlank(attachmentFName) && img != null && img.length() > 10) {
            try {
                URL imgUrl = new URL(img);
                attachmentFName = HttpUtils.downloadImage(imgUrl, tmpDir);
            } catch (Exception e) {
                logger.error("DOWNLOAD ERROR", e);
                throw new HttpBadRequestException();
            }
        }
        Message msg = new Message();
        msg.setType(Message.Type.CHAT);
        msg.setFrom(Jid.of(String.valueOf(visitor.getUid()), "uid.juick.com", "perl"));
        msg.setTo(Jid.of("juick@juick.com/Juick"));
        msg.setBody(body);
        try {
            if (StringUtils.isNotEmpty(attachmentFName)) {
                String attachmentUrl = String.format("juick://%s", attachmentFName);
                msg.addExtension(new OobX(new URI(attachmentUrl), "!!!!Juick!!"));
            }
            xmpp.sendMessage(msg);
        } catch (URISyntaxException e1) {
            logger.warn("attachment error", e1);
        }
        if (StringUtils.isBlank(referer) || referer.substring(0, 21).equals("http://juick.com/post")
                || referer.substring(0, 22).equals("https://juick.com/post")) {
            return "redirect:/?show=my";
        }
        return "redirect:" + referer;
    }
}