<?php  // $Id: play.php,v 1.16.2.9 2011/07/29 21:07:03 bdaloukas Exp $

// This files plays the game hangman

function game_hangman_continue($id, $game, $attempt, $hangman, $newletter, $action){
	global $USER;
	if($attempt != false and $hangman != false){
		if(($action == 'nextword') and ($hangman->finishedword != 0)){
			//finish with one word and continue to another
			if( !set_field( 'game_hangman', 'finishedword', 0, 'id', $hangman->id)){
				error( "game_hangman_continue: Can't update game_hangman");
			}
        }
        else{
			return game_hangman_play( $id, $game, $attempt, $hangman);
		}
	}
	
	$updatehangman = (($attempt != false) and ($hangman != false));
		
	$textlib = textlib_get_instance();

	//new game
    
    //I try 10 times to find a new question
    $found = false;
    $min_num = 0;
    $unchanged = 0;
    for($i=1; $i <= 10; $i++){
        //Check the repetitions later
		$rec = game_question_shortanswer($game, $game->param7, false);
		if($rec === false){
			continue;
		}

        $answer = game_upper($rec->answertext, $game->language);
        
        $answer2 = $answer;
        if( $game->param7){
            //Have to delete space
            $answer2 = str_replace(' ', '', $answer2);
        }
        if( $game->param8){
            //Have to delete -
            $answer2 = str_replace('-', '', $answer2);
        }
        if( $game->language == ''){
            $game->language = game_detectlanguage($answer2);
        }
        $allletters = game_getallletters($answer2, $game->language);
        if($allletters == ''){
            continue;
        }
        
        if($game->param7){
            $allletters .= '_';
        }        
        if($game->param8){
            $allletters .= '-';
        }        
		
		if($game->param7 == false){   
		    //I don't allow spaces
    		if(strpos($answer, " ")){
	    		continue;
	    	}
	   }
	   
	    $copy = false;
        $select2 = "gameid=$game->id AND userid='$USER->id' AND questionid='$rec->questionid' AND glossaryentryid='$rec->glossaryentryid'";
        if(($rec2 = get_record_select('game_repetitions', $select2, 'id,repetitions r')) != false){
            if( ($rec2->r < $min_num) or ($min_num == 0)){
                $min_num = $rec2->r;
                $copy = true;
            }
        }
        else{
            $min_num = 0;
            $copy = true;
        }
       
        if($copy){
            $found = true;
            
            $min->questionid = $rec->questionid;
            $min->glossaryentryid = $rec->glossaryentryid;
            $min->attachment = $rec->attachment;
            $min->questiontext = $rec->questiontext;
            $min->answerid = $rec->answerid;
            $min->answer = $answer;
            $min->language = $game->language;
            
            if($min_num == 0)
                break;  //We found an unused word
        }else
            $unchanged++;
            
        if( $unchanged > 2){
            if( $found)
                break;
        }
	}
		
	if( $found == false){
	    error( get_string( 'no_words', 'game'));
	}
	
	//Found one word for hangman
    if( $attempt == false){
        $attempt = game_addattempt( $game);
    }

    if( !set_field( 'game_attempts', 'language', $min->language, 'id', $attempt->id)){
        error( "game_cross_play: Can't set language");
    }
		        
    $_GET['newletter'] = '';
		
    $query->attemptid = $attempt->id;
	$query->gameid = $game->id;
	$query->userid = $USER->id;
	$query->sourcemodule = $game->sourcemodule;
	$query->questionid = $min->questionid;
	$query->glossaryentryid = $min->glossaryentryid;
	$query->attachment = $min->attachment;
	$query->questiontext = addslashes( $min->questiontext);
	$query->score = 0;
	$query->timelastattempt = time();
	$query->answertext = $min->answer;
	$query->answerid = $min->answerid;
	if(!($query->id = insert_record('game_queries', $query))){
		print_object($query);
		error("game_hangman_continue: Can't insert to table game_queries");
	}
		
	$newrec->id = $attempt->id;
	$newrec->queryid = $query->id;
	if($updatehangman == false){
		$newrec->maxtries = $game->param4;
		if($newrec->maxtries == 0){
			$newrec->maxtries = 1;
		}
		$newrec->finishedword = 0;
		$newrec->corrects = 0;
	}
		
	$newrec->allletters = $allletters;
		
	$letters = '';
	if($game->param1){
		$letters .= $textlib->substr($min->answer, 0, 1);
	}
	if($game->param2){
		$letters .= $textlib->substr($min->answer, -1, 1);
	}
	$newrec->letters = $letters;

	if($updatehangman == false){
		if(!game_insert_record('game_hangman', $newrec)){
			error( 'game_hangman_continue: error inserting in game_hangman');
		}	
    }
    else{
		if(!update_record(  'game_hangman', $newrec)){
			error( 'game_hangman_continue: error updating in game_hangman');
		}
		$newrec = get_record_select( 'game_hangman', "id=$newrec->id");
	}
		
	game_update_repetitions($game->id, $USER->id, $query->questionid, $query->glossaryentryid);
		
    game_hangman_play($id, $game, $attempt, $newrec);
}

function game_hangman_onfinishgame($game, $attempt, $hangman){
	$score = $hangman->corrects / $hangman->maxtries;

	game_updateattempts($game, $attempt, $score, true);

	if(!set_field('game_hangman', 'finishedword', 0, 'id', $hangman->id)){
		error("game_hangman_onfinishgame: Can't update game_hangman");
	}
}

function game_hangman_play($id, $game, $attempt, $hangman, $onlyshow=false, $showsolution=false)
{
	global $CFG;

    $query = get_record( 'game_queries', 'id', $hangman->queryid);

    game_compute_reserve_print( $attempt, $wordrtl, $reverseprint);
	
	if( $game->toptext != ''){
		echo $game->toptext.'<br>';
	}
    $max=$game->param10;		// maximum number of wrong
    if( $max <= 0)
        $max = 6;
    hangman_showpage($done, $correct, $wrong, $max, $word_line, $word_line2, $links,  $game, $attempt, $hangman, $query, $onlyshow, $showsolution);
	
    if(!$done){
        if ($wrong > $max){
            $wrong = $max;
        }
		if( $game->param3 == 0){
			$game->param3 = 1;
		}
        echo "\r\n<BR/><img src=\"".$CFG->wwwroot.'/mod/game/hangman/'.$game->param3.'/hangman_'.$wrong.'.jpg"';
		$message  = sprintf( get_string( 'hangman_wrongnum', 'game'), $wrong, $max);
		echo ' ALIGN="MIDDLE" BORDER="0" HEIGHT="100" alt="'.$message.'"/>';
		
        if ($wrong >= $max){
			//This word is incorrect. If reach the max number of word I have to finish else continue with next word
			hangman_oninncorrect( $id, $word_line, $query->answertext, $game, $attempt, $hangman);
            $query->percent = 0;
        }
        else{
            $i = $max-$wrong;
            if( $i > 1)
    			echo ' '.get_string( 'hangman_restletters_many', 'game', $i);
    	    else
    			echo ' '.get_string( 'hangman_restletters_one', 'game');
            if( $reverseprint){
                echo '<SPAN dir="'.($wordrtl ? 'rtl' : 'ltr').'">';
            }
            echo "<br/><font size=\"5\">\n$word_line</font>\r\n";
			if( $word_line2 != ''){
				echo "<br/><font size=\"5\">\n$word_line2</font>\r\n";
			}
            if( $reverseprint){
                echo "</SPAN>";
            }
			if( $hangman->finishedword == false){
				echo "<br/><br/><BR/>".get_string('hangman_letters', 'game').$links."\r\n";
			}
        }
    }
    else{
		//This word is correct. If reach the max number of word I have to finish else continue with next word
		hangman_oncorrect($id, $word_line, $game, $attempt, $hangman, $query);
        $query->percent = 1;
	}
	echo "<br/><br/>".get_string('grade', 'game').' : '.round($query->percent * 100).' %';
	if( $hangman->maxtries > 1){
		echo '<br/><br/>'.get_string('hangman_gradeinstance', 'game').' : '.round($hangman->corrects / $hangman->maxtries * 100).' %';
	}
	
	if( $game->bottomtext != ''){
		echo '<br><br>'.$game->bottomtext;
	}
}
function hangman_showpage(&$done, &$correct, &$wrong, $max, &$word_line, &$word_line2, &$links, $game, &$attempt, &$hangman, &$query, $onlyshow, $showsolution){
	global	$USER, $CFG;
	
	$word = $query->answertext;
	
	$textlib = textlib_get_instance();

    $newletter = optional_param('newletter', PARAM_TEXT);

	if($newletter == '_'){
	    $newletter = ' ';
    }

    $letters = $hangman->letters;
    if($newletter != NULL)
    {
		if($textlib->strpos($letters,$newletter) === false){
			$letters .= $newletter;
		}
    }

    $links="";

    $alpha = $hangman->allletters;
    $wrong = 0;
		
    if($game->param5){
        $s = trim( game_filtertext($query->questiontext, $game->course));
        if($s != '.' and $s <> ''){
    		echo "<br/><b>".$s.'</b>';
        }
		if($query->attachment != ''){
            $file = "{$CFG->wwwroot}/file.php/$game->course/moddata/$query->attachment";
		    echo "<img src=\"$file\" />";
		}
		echo "<br/><br/>";
	}

    $word_line = $word_line2 = "";
	
	$len = $textlib->strlen( $word);
	
	$done = 1;
	$answer = '';
    for ($x=0; $x < $len; $x++){
		$char = $textlib->substr($word, $x, 1);
		
		if( $showsolution){
			$word_line2 .= ($char == " " ? '&nbsp; ' : $char);
			$done = 0;
		}
		
		if ( $textlib->strpos($letters, $char)  === false){
			$word_line.="_<font size=\"1\">&nbsp;</font>\r\n";
			$done = 0;
			$answer .= '_';
		}else{
			$word_line .= ($char == " " ? '&nbsp; ' : $char);
			$answer .= $char;
		}
    }

    $correct = 0;

    $len_alpha = $textlib->strlen($alpha);
	$fontsize = 5;

    for ($c=0; $c < $len_alpha; $c++){
		$char = $textlib->substr($alpha, $c, 1);
		
		if ( $textlib->strpos($letters, $char) === false){
            //User didn't select this character
            $param_id = optional_param('id', 0, PARAM_INT);
			$params = 'id='.$param_id.'&amp;newletter='.urlencode( $char);
			if( $onlyshow or $showsolution){
				$links .= $char;
            }
            else{
				$links .= "<font size=\"$fontsize\"><a href=\"attempt.php?$params\">$char</a></font>\r\n";
			}
			continue;
		}
		
		if ($textlib->strpos($word, $char) === false){
			$links .= "\r\n<font size=\"$fontsize\" color=\"red\">$char </font>";
			$wrong++;
        }
        else{
			$links .= "\r\n<B><font size=\"$fontsize\">$char </font></B> ";
			$correct++;
		}
	}

	$finishedword = ($done or $wrong >= $max);
	$finished = false;

	$updrec->id = $hangman->id;
	$updrec->letters = $letters;
	if($finishedword){
		if($hangman->finishedword == 0){
			//only one time per word increace the variable try
			$hangman->try = $hangman->try + 1;
			if($hangman->try > $hangman->maxtries){
				$finished = true;
			}
			if( $done){
				$hangman->corrects = $hangman->corrects + 1;
				$updrec->corrects = $hangman->corrects;
			}
		}
		$updrec->try = $hangman->try;
		$updrec->finishedword = 1;
	}

	$query->percent = ($correct -$wrong/$max) /  $textlib->strlen( $word);
	if( $query->percent < 0){
		$query->percent = 0;
	}

	if($onlyshow or $showsolution){
		return;
	}
	
	if(!update_record( 'game_hangman', $updrec)){
		error("hangman_showpage: Can't update game_hangman id=$updrec->id");
	}
	
	if($done){
		$score = 1;
    }
    else if($wrong >= $max){
		$score = 0;
    }
    else{
		$score = -1;
	}
	
	game_updateattempts($game, $attempt, $score, $finished);
	game_update_queries($game, $attempt, $query, $score, $answer);
}

//This word is correct. If reach the max number of word I have to finish else continue with next word
function hangman_oncorrect($id, $word_line, $game, $attempt, $hangman, $query){  	
	echo "<br/><br/><font size=\"5\">\n$word_line</font>\r\n";
	
	echo '<p><br/><font size="5" color="green">'.get_string('win', 'game').'</font><br/><br/></p>';
	if( $query->answerid){
		$feedback = get_field('question_answers', 'feedback', 'id', $query->answerid);
		if($feedback != ''){
			echo "$feedback<br>";
		}
	}

	game_hangman_show_nextword($id, $game, $attempt, $hangman);
}

function hangman_oninncorrect($id, $word_line, $word, $game, $attempt, $hangman){
	$textlib = textlib_get_instance();
	
	echo "\r\n<br/><br/><font size=\"5\">\n$word_line</font>\r\n";

	echo '<p><br/><font size="5" color="red">'.get_string('hangman_loose', 'game').'</font><br/><br/></p>';
	
	if($game->param6){
		//show the correct answer
		if( $textlib->strpos($word, ' ') != false)
    		echo '<br/>'.get_string('hangman_correct_phrase', 'game');
        else
    		echo '<br/>'.get_string('hangman_correct_word', 'game');        		
		
		echo '<b>'.$word."</b><br/><br/>\r\n";
	}
	
	game_hangman_show_nextword($id, $game, $attempt, $hangman, true);	
}

function game_hangman_show_nextword($id, $game, $attempt, $hangman){
	global $CFG;
	
	echo '<br/>';
	if(($hangman->try < $hangman->maxtries) or ($hangman->maxtries == 0)){
		//continue to next word
		$params = "id=$id&action2=nextword\">".get_string('nextword', 'game').'</a> &nbsp; &nbsp; &nbsp; &nbsp;'; 
		echo "<a href=\"$CFG->wwwroot/mod/game/attempt.php?$params";
    }
    else{
		game_hangman_onfinishgame($game, $attempt, $hangman);
		echo "<a href=\"$CFG->wwwroot/mod/game/attempt.php?id=$id\">".get_string('nextgame', 'game').'</a> &nbsp; &nbsp; &nbsp; &nbsp; ';
	}
	
	if (!$cm = get_record("course_modules", "id", $id)){
		error("Course Module ID was incorrect id=$id");
	}

	echo "<a href=\"$CFG->wwwroot/course/view.php?id=$cm->course\">".get_string('finish', 'game').'</a> ';
}

?>