root/geowiki/annotate.rs.php

<?php 
require("jsrsServer.php.inc");
include("shared.php");
//annotate($file,$uid,$title,$url,$description,$imgurl,$tags,$coords,$geoType,$user)
jsrsDispatch("annotate");

function buildtags($newtags) {
    $lines = fopen("./tags.count","r");
    while (!feof($lines)) {
        $line = fgets($lines);
        $line = rtrim($line);
        $tmp = split("\t", $line);
        $tags[ $tmp[0] ] = $tmp[1];
    }
    fclose($lines);

    $tmp = explode(",", $newtags);
    foreach ($tmp as $tag) {
        $tags[ strtolower(trim($tag)) ] += 1;
    }

    $maxcount = 0;

    $handle = fopen("./tags.count","w");
    foreach (array_keys($tags) as $tag) {
        fwrite($handle, $tag . "\t" . $tags[ $tag ] . "\n");
        if ($tags[ $tag ] > $maxcount) {
            $maxcount = $tags[ $tag ];
        }    
    }
    fclose($handle);

    $minsize = 10;
    $maxsize = 20;

    $sorted = array_keys($tags); sort($sorted);

    $handle = fopen("./tags","w");
    foreach ($sorted as $tag) {
        $size = ($maxsize-$minsize) * $tags[$tag] / $maxcount + $minsize;
        fwrite($handle, "<a href=\"javascript:tagclick('" . $tag . "')\" style=\"font-size: ". $size . "px;\">" . $tag . "</font> ");
    }
    fclose($handle);
} 

//TODO: do all this with xml-parsing functions
//insert a new geo item into the xml $file
//$file: where to write to (if empty, $file = rss.xml)
//$uid: unique id for the item, if given will replace an existing item with the same id
//$title: name of the item
//$url: link which is opened when clicking on this item on a map
//$description: a textual description
//$imgurl: an image to be displayed at this items location
//$tags: space-separated list of tags (=categories) which this item falls in
//$coords: (lat,long) pairs (one for a point, more for lines+polygons, each separated by " "
//$geoType: either "point", "line" or "polygon"
//$user: name of the user who created / edited the item
//except of $coords no elements are required
//return value is "success" or a failure message
function annotate($file,$uid,$title,$url,$description,$imgurl,$tags,$coords,$geoType,$user) {
    if ($title == '' || $coords == '')
        return "Not enough values provided.";
    if ($uid == '')
        $uid = $title;
    if ($file == '')
        $file = 'rss.xml';
    if ($geoType == '')
        $geoType = 'point';

    //code fields as xml-entry
    $item = fields2xml($uid,$title,$url,$description,$imgurl,$tags,$coords,$geoType,$user);
    if ($item == '')
        return 'Error when converting to xml.';
    
    //read rss file
    $handle = fopen($file,"r") or die($php_errormsg);
    $contents = fread($handle, filesize($file));
    fclose($handle) or die($php_errormsg);

    //find first entry
    $itemStart = strpos($contents, '<item>');
    $itemEnd = $itemStart;

    //insert or replace new item
    $newcontents = substr_replace($contents, $item . "\n", $itemStart, $itemEnd - $itemStart);

    //write to rss file
    $handle = fopen($file,"w") or die($php_errormsg);
    fwrite($handle, $newcontents);
    changeLog($file . '.log', "add", $item);
    fclose($handle) or die($php_errormsg);
    
    buildtags($tags);

    return ("success");
} 

?>