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<?PHP // $Id$

$USER_SMALL_CLASS = 20; // Below this is considered small
$USER_LARGE_CLASS = 200; // Above this is considered large
$USER_HUGE_CLASS = 500; // Above this is considered too many to display

/// FUNCTIONS ///////////////////////////////////////////////////////////

function ImageCopyBicubic ($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {

    global $CFG;

    if (function_exists("ImageCopyResampled") and $CFG->gdversion >= 2) {
       return ImageCopyResampled($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y,
                                 $dst_w, $dst_h, $src_w, $src_h);
    }

    $totalcolors = imagecolorstotal($src_img);
    for ($i=0; $i<$totalcolors; $i++) {
        if ($colors = ImageColorsForIndex($src_img, $i)) {
            ImageColorAllocate($dst_img, $colors['red'], $colors['green'], $colors['blue']);
        }
    }

    $scaleX = ($src_w - 1) / $dst_w;
    $scaleY = ($src_h - 1) / $dst_h;

    $scaleX2 = $scaleX / 2.0;
    $scaleY2 = $scaleY / 2.0;

    for ($j = 0; $j < $dst_h; $j++) {
        $sY = $j * $scaleY;

        for ($i = 0; $i < $dst_w; $i++) {
            $sX = $i * $scaleX;

            $c1 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY+$scaleY2));
            $c2 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX,(int)$sY));
            $c3 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY+$scaleY2));
            $c4 = ImageColorsForIndex($src_img,ImageColorAt($src_img,(int)$sX+$scaleX2,(int)$sY));

            $red = (int) (($c1['red'] + $c2['red'] + $c3['red'] + $c4['red']) / 4);
            $green = (int) (($c1['green'] + $c2['green'] + $c3['green'] + $c4['green']) / 4);
            $blue = (int) (($c1['blue'] + $c2['blue'] + $c3['blue'] + $c4['blue']) / 4);

            $color = ImageColorClosest ($dst_img, $red, $green, $blue);
            ImageSetPixel ($dst_img, $i + $dst_x, $j + $dst_y, $color);
        }
    }
}


function save_user_image($userid, $filename) {
// Given a filename to a known image, this function scales and crops
// it and saves it in the right place to be a user image.

    global $CFG;

    if (empty($CFG->gdversion)) {
        return false;
    }

    $imageinfo = GetImageSize($filename);
    $image->width = $imageinfo[0];
    $image->height = $imageinfo[1];
    $image->type = $imageinfo[2];

    switch ($image->type) {
        case 1:
            if (function_exists("ImageCreateFromGIF")) {
                $im = ImageCreateFromGIF($filename);
            } else {
                notice("GIF not supported on this server");
                return false;
            }
            break;
        case 2:
            if (function_exists("ImageCreateFromJPEG")) {
                $im = ImageCreateFromJPEG($filename);
            } else {
                notice("JPEG not supported on this server");
                return false;
            }
            break;
        case 3:
            if (function_exists("ImageCreateFromPNG")) {
                $im = ImageCreateFromPNG($filename);
            } else {
                notice("PNG not supported on this server");
                return false;
            }
            break;
        default:
            return false;
    }

    if (function_exists("ImageCreateTrueColor") and $CFG->gdversion >= 2) {
        $im1 = ImageCreateTrueColor(100,100);
        $im2 = ImageCreateTrueColor(35,35);
    } else {
        $im1 = ImageCreate(100,100);
        $im2 = ImageCreate(35,35);
    }
    
    $cx = $image->width / 2;
    $cy = $image->height / 2;

    if ($image->width < $image->height) {
        $half = floor($image->width / 2.0);
    } else {
        $half = floor($image->height / 2.0);
    }

    if (!file_exists("$CFG->dataroot/users")) {
        if (! mkdir("$CFG->dataroot/users", 0777)) {
            $badpermissions = true;
        }
    }
    if (!file_exists("$CFG->dataroot/users/$userid")) {
        if (! mkdir("$CFG->dataroot/users/$userid", 0777)) {
            $badpermissions = true;
        }
    }
    
    if ($badpermissions) {
        return 0;

    } else {
        ImageCopyBicubic($im1, $im, 0, 0, $cx-$half, $cy-$half, 100, 100, $half*2, $half*2);
        ImageCopyBicubic($im2, $im, 0, 0, $cx-$half, $cy-$half, 35, 35, $half*2, $half*2);

        // Draw borders over the top.
        $black1 = ImageColorAllocate ($im1, 0, 0, 0);
        $black2 = ImageColorAllocate ($im2, 0, 0, 0);
        ImageLine ($im1, 0, 0, 0, 99, $black1);
        ImageLine ($im1, 0, 99, 99, 99, $black1);
        ImageLine ($im1, 99, 99, 99, 0, $black1);
        ImageLine ($im1, 99, 0, 0, 0, $black1);
        ImageLine ($im2, 0, 0, 0, 34, $black2);
        ImageLine ($im2, 0, 34, 34, 34, $black2);
        ImageLine ($im2, 34, 34, 34, 0, $black2);
        ImageLine ($im2, 34, 0, 0, 0, $black2);
    
        if (ImageJpeg($im1, "$CFG->dataroot/users/$userid/f1.jpg", 90) and
            ImageJpeg($im2, "$CFG->dataroot/users/$userid/f2.jpg", 95) ) {
            return 1;
        } else {
            return 0;
        }
    }
}


function print_user($user, $course, $string) {

    global $USER, $COUNTRIES;
    
    echo "<TABLE WIDTH=80% ALIGN=CENTER BORDER=0 CELLPADDING=1 CELLSPACING=1><TR><TD BGCOLOR=#888888>";
    echo "<TABLE WIDTH=100% BORDER=0 CELLPADDING=5 CELLSPACING=0><TR>";
    echo "<TD WIDTH=100 BGCOLOR=#FFFFFF VALIGN=top>";
    print_user_picture($user->id, $course->id, $user->picture, true);
    echo "</A>";
    echo "</TD><TD WIDTH=100% BGCOLOR=#FFFFFF VALIGN=top>";
    echo "<FONT SIZE=-1>";
    echo "<FONT SIZE=3><B>$user->firstname $user->lastname</B></FONT>";
    echo "<P>";
    if (!empty($user->role) and ($user->role <> $course->teacher)) {
        echo "$string->role: $user->role<BR>";
    }
    if ($user->maildisplay == 1 or ($user->maildisplay == 2 and $course->category) or isteacher($course->id)) {
        echo "$string->email: <A HREF=\"mailto:$user->email\">$user->email</A><BR>";
    }
    echo "$string->location: $user->city, ".$COUNTRIES["$user->country"]."<BR>";
    if ($user->lastaccess) {
        echo "$string->lastaccess: ".userdate($user->lastaccess);
        echo "&nbsp (".format_time(time() - $user->lastaccess, $string).")";
    } else {
        echo "$string->lastaccess: $string->never";
    }
    echo "</TD><TD VALIGN=bottom BGCOLOR=#FFFFFF NOWRAP>";

    echo "<FONT SIZE=1>";
    if (isteacher($course->id)) {
        $timemidnight = usergetmidnight(time());
        echo "<A HREF=\"../course/user.php?id=$course->id&user=$user->id\">$string->activity</A><BR>";
        if (isstudent($course->id, $user->id)) {
            echo "<A HREF=\"../course/unenrol.php?id=$course->id&user=$user->id\">$string->unenrol</A><BR>";
            echo "<A HREF=\"../course/loginas.php?id=$course->id&user=$user->id\">$string->loginas</A><BR>";
        }
    }
    echo "<A HREF=\"view.php?id=$user->id&course=$course->id\">$string->fullprofile...</A>";
    echo "</FONT>";

    echo "</TD></TR></TABLE></TD></TR></TABLE>";
}

?>
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