<?php
/*
*   PHP Mole - An Integrated Development enviroment 
*   Copyright (C) 2002  Alan Knowles alan@akbkhome.com
*
*   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; if not, write to the Free Software
*   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
*   @package phpmole
*   
*   The Preferences class
*   usually accessed by $application->prefs->get()
*   or $application->prefs->set()
*    
*/

class phpmole_prefs {
   // class that loads prefs!
   // stores data in a global array prefs!
   var $prefs;
   
    function load ($filename="") { // load the Preferences file
        global $HTTP_ENV_VARS;
        $p ="";
        if (!$filename) {
            if (substr(PHP_OS, 0, 3) == 'WIN')
                $p = ".WIN";
            $filename = dirname(__FILE__)."/Preferences{$p}";
        }
        //echo $filename;
        $this->data = file($filename);
        //echo serialize($this->data);
        $this->parse();
    }
   
   function parse() {
      
      for ($i=0;$i< count($this->data);$i++) {
         $line = trim($this->data[$i]);
         if (!$line) continue;
         if (substr($line,0,1) == "[") {
            $major = substr($line,1,-1);
            //print "GOT MAJOR $major\n";
            continue;
         }
         $eq = strpos( $line,"=");
         $left = trim(substr($line,0,$eq));
         $right = substr($line,$eq+1);
         $this->prefs[$major."/".$left] = trim($right);
          //echo "Setting pref $major/$left = $right\n";
      }
   }
   
   
   
   function write($file) {
      // map [major/minor] = xxx
      // to
      // [major]
      // minor = xxxx
      // first convert list into array[major][minor]
      //echo "WRITING TO $file";
      foreach($this->prefs as $k => $v) { 
        $p = strpos($k,"/");
        if (!$p) continue;
        $major  = substr($k,0,$p);
        $minor = substr($k,$p+1);
        $sorted[$major][$minor] = $v;
        //echo "STORING $major / $minor = $v\n";
      }
      $fh = fopen($file,"w");
      
      foreach($sorted as $k => $v) {
         fwrite($fh,"\n[$k]\n");
         foreach($v as $minor => $value) 
           fwrite($fh,"$minor = $value\n");
      }
         
      fclose($fh);
    }  
    
    function load_user_prefs() {
        $homedir = getenv("HOME");
        if (substr(PHP_OS, 0, 3) == 'WIN') 
            $homedir = "C:\Program Files";
    
        if (file_exists($homedir."/.".APPNAME."/Preferences"))
            $this->load($homedir."/.".APPNAME."/Preferences");
    }
    
    
    function save_user_prefs() {
        $homedir = getenv("HOME");
       if (substr(PHP_OS, 0, 3) == 'WIN') 
         $homedir = "C:\Program Files";
       
       //echo "MKDIR ". $homedir."/.".APPNAME;
       if (!is_dir($homedir."/.".APPNAME)) 
          mkdir($homedir."/.".APPNAME,0700);
       $this->write($homedir."/.".APPNAME."/Preferences");
    }
    
    function get($a) {
      return @$this->prefs[$a];
    }
    function set($a,$b) {
       //echo("PREFS SET $a = $b");
      $this->prefs[$a] = $b;
    }
    
    function shunt_array($value, $prefix,  $max) {
        // used for recent files
        // adds value to 0 
        // moves 1->2
        for ($i=$max;$i>0;$i--) 
            $this->set($prefix . "_" . sprintf("%1d",$i),
                $this->get ($prefix . "_" . sprintf("%1d",$i-1)));
		
        $this->set($prefix ."_0",$value);
    
    }
    function get_array($a) {
        $i=0;
        $ret = array();
        while (@isset($this->prefs["{$a}_".sprintf("%1d",$i)])) {
            $ret[$i] = $this->prefs["{$a}_".sprintf("%1d",$i)];
	    $i++;
	} 
	return $ret;    
      
    }
    function set_array($a,$b) {
        $this->clear_array($a);
        foreach($b as $k=>$v) 
            $this->set($a . "_" . sprintf("%1d",$k), $v);
    }
    function clear_array($a) {
        if ($keys = array_keys($this->prefs))
            foreach($keys as $k) 
                if ($a == substr($k,0,strlen($a)))
                    unset($this->prefs[$k]);
    }
    function prune_array($a,$n) {
        $ar = $this->get_array($a);
        // get the last n elements of the array
        if (count($ar) < $n) return array();
        // n =10 count = 12 -> old = 0-2
        $old = array_splice($ar,0, count($ar)-$n);
        // new = 2->12
        $new = array_splice($ar,count($ar)-$n);
        $this->set_array($a,$new);
        //echo "NEW:".serialize($new);
        //echo "OLD:".serialize($old);
        return $old;
    }
        
    
    function un_set($a) {
        if (isset($this->prefs[$a]))
            unset($this->prefs[$a]);
    } 
   
} 
?>