#!/usr/bin/env php
<?php
// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC.  If not, see <http://www.gnu.org/licenses/>.

require_once("../project/project.inc");
require_once("../inc/util.inc");
require_once("../inc/uotd.inc");
require_once("../inc/db.inc");
require_once("../inc/profile.inc");

// this causes "cannot modify header" errors
//echo date(DATE_RFC822), ": Starting\n";

set_time_limit(0);
ini_set("memory_limit", "1024M");

db_init();

// TODO: convert to new DB interface

$alphabet = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z','0','1','2','3','4','5','6','7','8','9');


// Builds a summary table of user profiles.
//
//   $members is an array of userIDs;
//   $offset indicates which entry to begin the table with
//   $numToDisplay indicates how many profiles to display in this table
//   $cols indicates how many profile summaries should be written per row
//   $descriptor is an optional file descriptor to write the table to.

function show_user_table($members, $offset, $numToDisplay, $cols) {
    echo "<table class=bordered border=1 cellpadding=5>\n";

    $rows = ceil($numToDisplay / $cols);
    $count = $offset;
    $numMembers = count($members);

    for ($row = 0; $row < $rows; $row++) {
        if ($count >= $numMembers) {
            break;
        }

        echo "<tr>\n";

        for ($col = 0; $col < $cols; $col++) {
            if ($count < $numMembers) {
                $profile = get_profile($members[$count]);
                if (!$profile) {
                    $numMembers--;
                    continue;
                }

                echo "<td class=bordered width=7% height=64><center>";

                $show_picture = $profile->has_picture;
                if (profile_screening() && $profile->verification != 1) {
                    $show_picture = false;
                }
                if ($show_picture) {
                    echo "<a href=\"".URL_BASE."view_profile.php?userid={$members[$count]}\"><img src=\"".URL_BASE.IMAGE_URL."{$members[$count]}_sm.jpg\"></a>";
                } else {
                    echo "&nbsp;";
                }

                echo "</center></td><td class=bordered width=33% height=64>\n", get_profile_summary($profile), "</td>";
                $count++;
            } else {
                echo "<td width=7% height=64></td><td width=33% height=64></td>";
            }
        }
        echo "</tr>\n";
    }
    echo "</table>\n";

}

// Generates a standard set of links between associated multi-page documents.
//  All linked files must be of the form "$filename_<page number>.html".

function write_page_links($filename, $currPageNum, $numPages) {
    echo "<p>Page $currPageNum of $numPages</p>";

    $nextPageNum = $currPageNum + 1;
    $prevPageNum = $currPageNum - 1;

    // Make the 'previous' and 'next' page links as appropriate.
    if ($currPageNum > 1) {
        echo "<a href={$filename}_{$prevPageNum}.html>Previous page</a>";

        if ($currPageNum != $numPages) {
            echo " | ";
        }
    }
    if ($currPageNum != $numPages) {
        echo "<a href={$filename}_{$nextPageNum}.html>Next page</a>";
    }

    echo "<p>Jump to Page:\n";

    // Make the individual page links (or a bold non-link for the current page).
    //
    for ($i = 1; $i <= $numPages; $i++) {
        if ($i != $currPageNum) {
            echo "<a href={$filename}_{$i}.html>$i</a>\n";
        } else {
            echo "<b>$i</b>\n";
        }
    }

}

// Generates the html files which comprise the photo gallery.
//   $room: which gallery to generate (user, computer).
//   $width: the width of the table of images.
//   $height: the height of the table of images.
//
function build_picture_pages($width, $height) {

    // TODO: Add support for a computer image gallery.

    // TODO: Standardize "Last modified" string to a function call (util.inc).

    if (profile_screening()) {
        $query = "SELECT userid FROM profile WHERE has_picture = 1 AND verification=1";
    } else {
        $query = "SELECT userid FROM profile WHERE has_picture = 1";
    }
    $result = mysql_query($query);
    $numIds = mysql_num_rows($result);

    //echo "Result has $numIds rows.<br>";

    // Build an array of IDs of all users with pictures in their profiles.
    while ($row = mysql_fetch_array($result, MYSQL_NUM)) {
        $userIds[] = $row[0];
    }

    mysql_free_result($result);

    if (count($userIds) > 0) {
        // Randomize the ordering of users.
        shuffle($userIds);
    }

    $numPages = ceil(count($userIds)/($width * $height));

    // Make sure that a page is generated even when no profiles with pictures
    // exist in order to avoid 404 errors from the profile_menu page.

    if ($numPages == 0) {
        $numPages = 1;
    }

    //echo "Generating $numPages pages.<br>";

    $count = 0;

    for ($page = 1; $page <= $numPages; $page++) {
        $filename = PROFILE_PATH . "user_gallery_" . $page . ".html";
        open_output_buffer();

        page_head("Profile gallery: page $page of $numPages", null, null, "../");

        echo "Last updated ", pretty_time_str(time()),
            "\n<p>Browse the user profiles by picture.
            Only user profiles with pictures are listed here.";


        echo "<table class=bordered border=1 cellpadding=5\n";

        for ($row = 0; $row < $height; $row++) {
            echo "<tr>";
            for ($col = 0; $col < $width; $col++) {
	            if ($count < $numIds) {
                    echo "<td class=\"bordered\" align=\"center\">
                        <a href=\"".URL_BASE."view_profile.php?userid=".$userIds[$count]."\"><img src=\"".URL_BASE.IMAGE_URL.$userIds[$count]."_sm.jpg\"></a>
                    </td>";
                    $count++;
                }
            }
            echo "</tr>\n";
            if ($count == $numIds) {
                break;
            }
        }

        echo "</table>\n";

        // Previous and Next links

        write_page_links("user_gallery", $page, $numPages);

        page_tail(false, "../");

        close_output_buffer($filename);
    }

    //echo "<br><br><a href=\""  .PROFILE_PATH . "user_gallery_1.html\">Go to the first generated page.</a>";
}

// Creates pages grouping user profiles by country.  Filenames are of the
// format "profile_country_<country name>_<page number>.html"
// Also creates a summary page listing all countries which have profiled
// members, the number of such members, and links to the created pages for
// each country.

function build_country_pages() {
    $query = "select userid from profile";
    $result = mysql_query($query);
    $numIds = 0;

    // Build a multi-dimensional array of countries,
    // each element of which contains an array
    // of the userids who belong to those countries.
    // Format: array[country][index] = userid.

    while ($profile = mysql_fetch_object($result)) {
        $user = lookup_user_id($profile->userid);
        if (!$user) continue;
        if ($user->country) {
            $countryMembers[$user->country][] = $user->id;
            $numIds++;
        } else {
            $countryMembers['Other'][] = $user->id;
        }
    }

    mysql_free_result($result);

    //echo "$numIds users have profiles AND non-null country entries.<br>";

    $countries = array_keys($countryMembers);
    sort($countries);

    // Build the pages.
    // TODO: Define a constant for the desired number of rows per page.

    foreach ($countries as $country) {
        $baseFileName =  "profile_country_" . get_legal_filename($country);
        $filePath = PROFILE_PATH;
        build_profile_pages(
            $countryMembers[$country],
            "User Profiles from $country", $country, 5, 2,
            $filePath, $baseFileName, "../html/"
        );
    }

    // Build the summary page linking to the individual country pages.

    build_country_summary_page($countryMembers);

    //echo "<br><a href=\"" . PROFILE_PATH . "profile_country.html\">View Summary Page</a>";
    //echo "<br><br>Done";

}

// Creates pages grouping users by the first letter of their names.

function build_alpha_pages() {
    global $alphabet;

    $query = "select userid from profile";
    $result = mysql_query($query);
    $numIds = 0;

    while ($profile = mysql_fetch_object($result)) {
        $user = lookup_user_id($profile->userid);
        if (!$user) continue;
        if ($user->name) {
            $name = ltrim($user->name);
            $members[strtoupper($name[0])][] = $user->id;
            $numIds++;
        }
    }

    mysql_free_result($result);

    //echo "$numIds users have profiles AND non-null country entries.<br>";

    $letters = array_keys($members);

    foreach ($letters as $letter) {
        // NOTE: Array indexing is case sensitive.
        $filePath = PROFILE_PATH;
        if (in_array($letter, $alphabet)) {
            build_profile_pages(
                $members[$letter],
                "User Profiles - Names beginning with $letter",
                "Names beginning with $letter", 5, 2, $filePath,
                "profile_$letter"
            );
        } else {
            build_profile_pages(
                $members[$letter],
                "User Profiles - Names beginning with other characters",
                "Names beginning with other characters", 5, 2, $filePath,
                "profile_other"
            );
        }
        $letters_used[$letter] = 1;
    }

    build_alpha_summary_page($letters_used);
}

// A generalized function to produce some number of pages summarizing a
// set of user profiles.

function build_profile_pages($members, $pageHead, $pageTitle, $rowsPerPage, $colsPerPage, $filePath, $baseFileName) {
    $numMembers = count($members);
    $numPerPage = $rowsPerPage * $colsPerPage;
    $numPages = ceil(count($members) / $numPerPage);

    $count = 0;

    for ($page = 1; $page <= $numPages; $page++) {

        $filename = $filePath . $baseFileName . "_" . $page . ".html";
        open_output_buffer();

        $head = $pageHead . ": Page $page of $numPages";
        page_head($pageTitle, null, null, "../");

        echo "Last updated ", pretty_time_str(time()), "<p>\n";

        $offset = (($page-1) * $rowsPerPage * $colsPerPage);

        show_user_table($members, $offset, $numPerPage, $colsPerPage);

        write_page_links($baseFileName, $page, $numPages);

        page_tail(false, "../");

        close_output_buffer($filename);
    }

}

function build_country_summary_page($countryMembers) {
    $countries = array_keys($countryMembers);

    $filename = PROFILE_PATH . "profile_country.html";
    open_output_buffer();

    page_head("User Profiles by Country", null, null, "../");
    echo "Last updated " . pretty_time_str(time()) . "<p>";

    echo "<table border=0>\n";
    echo "<tr><td><b>Country</b></td><td align=\"center\"><b>Profiles</b></td></tr>\n";

    foreach ($countries as $country) {
        $numMembers = count($countryMembers[$country]);
        $name = get_legal_filename($country);

        echo "<tr>\n<td><a href=\"profile_country_",
            "{$name}_1.html\">$country</a></td><td align=\"center\">$numMembers</td></td>\n";
    }

    echo "</table>";
    page_tail(false, "../");

    close_output_buffer($filename);
}

function build_alpha_summary_page($characters_used) {
    global $alphabet;

    $filename = PROFILE_PATH."profile_alpha.html";
    open_output_buffer();

    foreach ($alphabet as $character) {
        if (isset($characters_used[$character])) {
            echo "<a href=\"".URL_BASE.PROFILE_URL."profile_{$character}_1.html\">$character</a>&nbsp;";
            unset($characters_used[$character]);
        } else {
            echo "$character ";
        }
    }

    // Link to the 'Other' page if necessary.
    if (!empty($characters_used)) {
        echo "<a href=\"".URL_BASE.PROFILE_URL."profile_other_1.html\">Other</a>&nbsp;";
    }
    close_output_buffer($filename);
}

build_country_pages();
build_alpha_pages();
build_picture_pages(GALLERY_WIDTH, GALLERY_HEIGHT);

echo date(DATE_RFC822), ": Finished\n";
?>