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 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
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 *
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 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Bespin.
 *
 * The Initial Developer of the Original Code is
 * Mozilla.
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var SC = require('sproutcore/runtime').SC;
var MultiDelegateSupport = require('DelegateSupport').MultiDelegateSupport;

/**
 * @class
 *
 * Base class for matching strategies.
 */
exports.Matcher = SC.Object.extend(MultiDelegateSupport, {
    _itemsChanged: function() {
        this.get('items').sort(function(a, b) { return b.score - a.score; });
        this.notifyDelegates('matcherUpdatedItems');
    }.observes('items'),

    _queryChanged: function() {
        var query = this.get('query'), items = this.get('items');
        items.forEach(function(item) {
            item.score = this.match(query, item.str);
        }, this);

        this.notifyPropertyChange('items', items);
    }.observes('query'),

    items: null,

    query: null,

    addString: function(str) {
        this.addStrings([ str ]);
    },

    addStrings: function(strings) {
        var query = this.get('query'), items = this.get('items');
        strings.map(function(str) {
            items.push({ score: this.match(query, str), str: str });
        }, this);

        this.notifyPropertyChange('items', items);
    },

    getMatches: function() {
        var matches = [];
        var items = this.get('items');
        for (var i = 0; i < items.length; i++) {
            var item = items[i];
            if (item.score === 0) {
                break;
            }

            matches.push(item);
        }

        return matches;
    },

    init: function() {
        this.set('items', []);
    }
});

