/**
 * blog_ajax_json_search.js
 *
 * Copyright (c) 2006 Kyo Nagashima <kyo@hail2u.net>
 * This library licensed under MIT license:
 * http://opensource.org/licenses/mit-license.php
 *
 *      Update by JJWorkshop HIRO.  2006/11/06
*/

var is_loaded = false;
var backnumber_url_list;
var entries;
var search_keyword;
var result_content;
var timerId;

load_center_id();
function load_center_id() {
    var center = document.getElementById( 'center' );
    if ( center ) {
        ligting_search_keyword( center );
    } else {
        window.setTimeout( 'load_center_id()', 5000 );
    }
}

function ligting_search_keyword( center ) {
    var args = getHashArgs();
    var searched_keyword = args.search_word;
    if ( searched_keyword ) {
        searched_keyword = searched_keyword.replace( /([\/\\\.\*\+\?\|\(\)\[\]\{\}\$\^])/g, "\\$1" );
        searched_keyword = searched_keyword.replace( /( +|　+)/, ' ' );
        searched_keyword = searched_keyword.replace( /( |　)$/, '' );
        var keywords = searched_keyword.split(/ |　/);
        var h3 = center.getElementsByTagName( 'h3' );
        h3[0].innerHTML = highlight( h3[0].innerHTML, keywords );
        var div = center.getElementsByTagName( 'div' );
        for ( var i = 0; i < div.length; i++ ) {
            if ( div[i].className == 'entry-body-text' ) {
                div[i].innerHTML = highlight( div[i].innerHTML, keywords );
            }
        }
    }
}

function getHashArgs () {
    var args = new Object();
    var query = location.href.replace(/.*?#/,"");
   query = decodeURIComponent( query );
    var pairs = query.split("&");
    for ( var i = 0; i < pairs.length; i++ ) {
        var pos = pairs[i].indexOf('=');
        if ( pos == -1 ) continue;
        var argname = pairs[i].substring( 0, pos );
        var value = pairs[i].substring( pos + 1 );
        args[argname] = value;
    }
    return args;
}

function blogAjaxJsonSearch( archive_file_path, text ) {
    search_keyword = text;
	result_content = $('results');
    added_period( result_content );
    if ( is_loaded ) {
        search();
    } else {
        new Ajax.Request( archive_file_path, {method: 'get', onComplete: function(request){ parse_archive_data( request ); } } );    
    }
}

function added_period( content ) {
    if ( !is_loaded ) {
        //result_content.innerHTML += '.';
        timerId = setTimeout("added_period()", 50 );
    }
}

function parse_archive_data( request ) {
        var data_string = request.responseText;
        data_string = data_string.replace( new RegExp( '<.*?>', "i"), '' )
        entries = eval( data_string );
        search();
}

function show_all_backnumbers() {
    var text = '<ol type=1 start=1 style="text-align:left;">';
    for ( var i = 0; i < entries.length; i++ ) {
        text += '<li><a href="' + entries[i].link + '">' +entries[i].title + '</a</li>';
    }
    text += '</ol>';
    document.getElementById('center').innerHTML = text;
}

function search() {
    var result_data = new Array();
    search_keyword=search_keyword.replace( /([\/\\\.\*\+\?\|\(\)\[\]\{\}\$\^])/g, "\\$1" );
    search_keyword = search_keyword.replace( /( +|　+)/, ' ' );
    search_keyword = search_keyword.replace( /( |　)$/, '' );
    var keywords = search_keyword.split(/ |　/);
    var key = new Array();
    for (var i= 0;i<keywords.length;i++) {
        key[ key.length ] = new RegExp( keywords[i], "i" );
    }
    for ( var i= 0; i<entries.length; i++ ) {
        var is_match = true;
        for ( var j= 0; j<key.length; j++ ) {
            var res_body = key[j].exec( entries[i].body );
            var res_title = key[j].exec( entries[i].title );
            if ( !res_body && !res_title ) {
                is_match = false;
            }
        }
        if ( is_match ) {
            result_data[ result_data.length ] = entries[i];
        }
    }
	var result_html = '<div class="search_results"><div class="button"><a href="javascript:clearResults();" title="検索結果をクリア" class="close">検索結果をクリア</a></div>';
    if ( result_data.length == 0 ) {
        result_html +=  '<p>該当するページが見つかりませんでした。</p><br /></div>';
    } else {
        result_html +=  build_search_result_html( result_data, keywords );
    }
    var div = window.document.getElementsByTagName('div');
//	var content;
//	var original_content_html = '';
//	for ( var i = 0; i < div.length; i ++ ) {
//		if ( div[i].className == 'content' ) {
//			content = div[i];
//			original_content_html = content.innerHTML;
//		}
//	}
    is_loaded = true;
    clearTimeout(timerId);
    result_content.innerHTML = result_html;
}

function build_search_result_html( result_data, keywords ) {

	var html = [''];
	html.push([
		'<p>本BLOG内から',
		'<strong> ',
		keywords,
		'</strong> を検索した結果 <strong>',
		result_data.length,
		'</strong> 件見つかりました。',
		'</p><hr />'
	].join(''));

    for ( var i= 0; i<result_data.length; i++ ) {
	    html.push([
	      '<h4>',
	      (i+1),
	      ' .<a href="',
	      result_data[i].link,
	      '#search_word=',
	      search_keyword,
	      '" target="_blank">',
	      highlight( result_data[i].title, keywords ),
	      '</a></h4><p class="summary">',
	      highlight( trunc( result_data[i].body, keywords[0] ), keywords ),
	      '</p><hr />'
	    ].join(''));
    }
	html.push([
      '<p class="copyright">powered by <a href="http://java.cocolog-nifty.com/blog/2005/12/typepadmtajaxja_c70d.html" target="_blank">blog_ajax_json_search.js</a></p>'
	].join(''));
    return html.join('');
}

function trunc( text, keyword ) {
    var key = new RegExp( keyword, "i" );
    var res = key.exec( text );

    if ( res ) {
    	var index  = res.index;
    	var length = res[0].length;
    	var start;
    	var end;

    	start = index - 20;
    	end = 55;
    	text = text.substring( start, index ) + text.substr( index, length ) + text.substr( index + length, end ) +'...';
    } else {
        text = text.substring( start, 50 );
    }
    return text;
}

function highlight( text, keywords ) {
    var keyword = '';
    for ( var i= 0; i<keywords.length; i++ ) {
        if ( i == keywords.length - 1 ) {
            keyword += keywords[i];
        } else {
            keyword += keywords[i] + '|'; 
        }
    }
    return text.replace( new RegExp( '(' + keyword + ')', "ig"), '<span style="color: #FF0000;">' + "$1" + '</span>' );
}