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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
 *
 * Copyright (c) 2009 Daniel Nicoletti <dantti85-pk@yahoo.com.br>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include "apt-utils.h"

#include <iostream>
#include <fstream>
#include <sys/stat.h>

PkGroupEnum get_enum_group(string group)
{
    if (group.compare ("admin") == 0) {
        return PK_GROUP_ENUM_ADMIN_TOOLS;
    } else if (group.compare ("base") == 0) {
        return PK_GROUP_ENUM_SYSTEM;
    } else if (group.compare ("comm") == 0) {
        return PK_GROUP_ENUM_COMMUNICATION;
    } else if (group.compare ("devel") == 0) {
        return PK_GROUP_ENUM_PROGRAMMING;
    } else if (group.compare ("doc") == 0) {
        return PK_GROUP_ENUM_DOCUMENTATION;
    } else if (group.compare ("editors") == 0) {
        return PK_GROUP_ENUM_PUBLISHING;
    } else if (group.compare ("electronics") == 0) {
        return PK_GROUP_ENUM_ELECTRONICS;
    } else if (group.compare ("embedded") == 0) {
        return PK_GROUP_ENUM_SYSTEM;
    } else if (group.compare ("fonts") == 0) {
        return PK_GROUP_ENUM_FONTS;
    } else if (group.compare ("games") == 0) {
        return PK_GROUP_ENUM_GAMES;
    } else if (group.compare ("gnome") == 0) {
        return PK_GROUP_ENUM_DESKTOP_GNOME;
    } else if (group.compare ("graphics") == 0) {
        return PK_GROUP_ENUM_GRAPHICS;
    } else if (group.compare ("hamradio") == 0) {
        return PK_GROUP_ENUM_COMMUNICATION;
    } else if (group.compare ("interpreters") == 0) {
        return PK_GROUP_ENUM_PROGRAMMING;
    } else if (group.compare ("kde") == 0) {
        return PK_GROUP_ENUM_DESKTOP_KDE;
    } else if (group.compare ("libdevel") == 0) {
        return PK_GROUP_ENUM_PROGRAMMING;
    } else if (group.compare ("libs") == 0) {
        return PK_GROUP_ENUM_SYSTEM;
    } else if (group.compare ("mail") == 0) {
        return PK_GROUP_ENUM_INTERNET;
    } else if (group.compare ("math") == 0) {
        return PK_GROUP_ENUM_SCIENCE;
    } else if (group.compare ("misc") == 0) {
        return PK_GROUP_ENUM_OTHER;
    } else if (group.compare ("net") == 0) {
        return PK_GROUP_ENUM_NETWORK;
    } else if (group.compare ("news") == 0) {
        return PK_GROUP_ENUM_INTERNET;
    } else if (group.compare ("oldlibs") == 0) {
        return PK_GROUP_ENUM_LEGACY;
    } else if (group.compare ("otherosfs") == 0) {
        return PK_GROUP_ENUM_SYSTEM;
    } else if (group.compare ("perl") == 0) {
        return PK_GROUP_ENUM_PROGRAMMING;
    } else if (group.compare ("python") == 0) {
        return PK_GROUP_ENUM_PROGRAMMING;
    } else if (group.compare ("science") == 0) {
        return PK_GROUP_ENUM_SCIENCE;
    } else if (group.compare ("shells") == 0) {
        return PK_GROUP_ENUM_SYSTEM;
    } else if (group.compare ("sound") == 0) {
        return PK_GROUP_ENUM_MULTIMEDIA;
    } else if (group.compare ("tex") == 0) {
        return PK_GROUP_ENUM_PUBLISHING;
    } else if (group.compare ("text") == 0) {
        return PK_GROUP_ENUM_PUBLISHING;
    } else if (group.compare ("utils") == 0) {
        return PK_GROUP_ENUM_ACCESSORIES;
    } else if (group.compare ("web") == 0) {
        return PK_GROUP_ENUM_INTERNET;
    } else if (group.compare ("x11") == 0) {
        return PK_GROUP_ENUM_DESKTOP_OTHER;
    } else if (group.compare ("alien") == 0) {
        return PK_GROUP_ENUM_UNKNOWN;//FIXME alien is an unknown group?
    } else if (group.compare ("translations") == 0) {
        return PK_GROUP_ENUM_LOCALIZATION;
    } else if (group.compare ("metapackages") == 0) {
        return PK_GROUP_ENUM_COLLECTIONS;
    } else {
        return PK_GROUP_ENUM_UNKNOWN;
    }
}

string getChangelogFile(const string &name,
                        const string &origin,
                        const string &verstr,
                        const string &srcPkg,
                        const string &uri,
                        pkgAcquire *fetcher)
{
    string descr("Changelog for ");
    descr += name;

    // no need to translate this, the changelog is in english anyway
    string filename = "/tmp/aptcc_changelog";

    new pkgAcqFileSane(fetcher, uri, descr, name, filename);

    ofstream out(filename.c_str());
    if (fetcher->Run() == pkgAcquire::Failed) {
        out << "Failed to download the list of changes. " << endl;
        out << "Please check your Internet connection." << endl;
        // FIXME: Need to dequeue the item
    } else {
        struct stat filestatus;
        stat(filename.c_str(), &filestatus );

        if (filestatus.st_size == 0) {
            // FIXME: Use supportedOrigins
            if (origin.compare("Ubuntu") == 0) {
                out << "The list of changes is not available yet.\n" << endl;
                out << "Please use http://launchpad.net/ubuntu/+source/"<< srcPkg <<
                       "/" << verstr << "/+changelog" << endl;
                out << "until the changes become available or try again later." << endl;
            } else {
                out << "This change is not coming from a source that supports changelogs.\n" << endl;
                out << "Failed to fetch the changelog for " << name << endl;
                out << "URI was: " << uri << endl;
            }
        }
    }
    out.close();

    return filename;
}

string getCVEUrls(const string &changelog)
{
    string ret;
    // Regular expression to find cve references
    GRegex *regex;
    GMatchInfo *match_info;
    regex = g_regex_new("CVE-\\d{4}-\\d{4}",
                        G_REGEX_CASELESS,
                        G_REGEX_MATCH_NEWLINE_ANY,
                        0);
    g_regex_match (regex, changelog.c_str(), G_REGEX_MATCH_NEWLINE_ANY, &match_info);
    while (g_match_info_matches(match_info)) {
        gchar *cve = g_match_info_fetch (match_info, 0);
        gchar *cveLink;
        if (!ret.empty()) {
            ret.append(";");
        }
        cveLink = g_strdup_printf("http://web.nvd.nist.gov/view/vuln/detail?vulnId=%s;%s", cve, cve);
        ret.append(cveLink);
        g_free(cveLink);
        g_free(cve);
        g_match_info_next(match_info, NULL);
    }
    g_match_info_free(match_info);
    g_regex_unref(regex);

    return ret;
}

string getBugzillaUrls(const string &changelog)
{
    string ret;
    // Matches Ubuntu bugs
    GRegex *regex;
    GMatchInfo *match_info;
    regex = g_regex_new("LP:\\s+(?:[,\\s*]?#(?'bug'\\d+))*",
                        G_REGEX_CASELESS,
                        G_REGEX_MATCH_NEWLINE_ANY,
                        0);
    g_regex_match (regex, changelog.c_str(), G_REGEX_MATCH_NEWLINE_ANY, &match_info);
    while (g_match_info_matches(match_info)) {
        gchar *bug = g_match_info_fetch_named(match_info, "bug");
        gchar *bugLink;
        if (!ret.empty()) {
            ret.append(";");
        }
        bugLink = g_strdup_printf("https://bugs.launchpad.net/bugs/%s;Launchpad bug #%s", bug, bug);
        ret.append(bugLink);
        g_free(bugLink);
        g_free(bug);
        g_match_info_next(match_info, NULL);
    }
    g_match_info_free(match_info);
    g_regex_unref(regex);

    // Debian bugs
    // Regular expressions to detect bug numbers in changelogs according to the
    // Debian Policy Chapter 4.4. For details see the footnote 15:
    // http://www.debian.org/doc/debian-policy/footnotes.html#f15
    // /closes:\s*(?:bug)?\#?\s?\d+(?:,\s*(?:bug)?\#?\s?\d+)*/i
    regex = g_regex_new("closes:\\s*(?:bug)?\\#?\\s?(?'bug1'\\d+)(?:,\\s*(?:bug)?\\#?\\s?(?'bug2'\\d+))*",
                        G_REGEX_CASELESS,
                        G_REGEX_MATCH_NEWLINE_ANY,
                        0);
    g_regex_match (regex, changelog.c_str(), G_REGEX_MATCH_NEWLINE_ANY, &match_info);
    while (g_match_info_matches(match_info)) {
        gchar *bug1 = g_match_info_fetch_named(match_info, "bug1");
        gchar *bugLink1;
        if (!ret.empty()) {
            ret.append(";");
        }
        bugLink1 = g_strdup_printf("http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=%s;Debian bug #%s", bug1, bug1);
        ret.append(bugLink1);

        gchar *bug2 = g_match_info_fetch_named(match_info, "bug2");
        if (!ret.empty() && bug2 != NULL) {
            gchar *bugLink2;
            ret.append(";");
            bugLink2 = g_strdup_printf("http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=%s;Debian bug #%s", bug1, bug1);
            ret.append(bugLink2);
            g_free(bugLink2);
            g_free(bug2);
        }

        g_free(bugLink1);
        g_free(bug1);
        g_match_info_next(match_info, NULL);
    }
    g_match_info_free(match_info);
    g_regex_unref(regex);

    return ret;
}

bool contains(PkgList packages, const pkgCache::PkgIterator &pkg)
{
    for (PkgList::iterator it = packages.begin(); it != packages.end(); ++it) {
        if (it->ParentPkg() == pkg) {
            return true;
        }
    }
    return false;
}

bool ends_with(const string &str, const char *end)
{
    size_t endSize = strlen(end);
    return str.size() >= endSize && (memcmp(str.data() + str.size() - endSize, end, endSize) == 0);
}

bool starts_with(const string &str, const char *start)
{
    size_t startSize = strlen(start);
    return str.size() >= startSize && (strncmp(str.data(), start, startSize) == 0);
}

bool utilRestartRequired(const string &packageName)
{
    if (starts_with(packageName, "linux-image-") ||
            starts_with(packageName, "nvidia-") ||
            packageName == "libc6" ||
            packageName == "dbus") {
        return true;
    }
    return false;
}

gchar* utilBuildPackageId(const pkgCache::VerIterator &ver)
{
    gchar *package_id;
    pkgCache::VerFileIterator vf = ver.FileList();
    package_id = pk_package_id_build(ver.ParentPkg().Name(),
                                     ver.VerStr(),
                                     ver.Arch(),
                                     vf.File().Archive() == NULL ? "" : vf.File().Archive());
    return package_id;
}

const char *utf8(const char *str)
{
    static char *_str = NULL;
    if (str == NULL) {
        return NULL;
    }

    if (g_utf8_validate(str, -1, NULL) == true) {
        return str;
    }

    g_free(_str);
    _str = NULL;
    _str = g_locale_to_utf8(str, -1, NULL, NULL, NULL);
    return _str;
}