001// Copyright 2010 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.services.javascript;
016
017import java.util.List;
018
019import org.apache.tapestry5.Asset;
020import org.apache.tapestry5.SymbolConstants;
021import org.apache.tapestry5.func.F;
022import org.apache.tapestry5.func.Mapper;
023import org.apache.tapestry5.internal.services.RequestConstants;
024import org.apache.tapestry5.ioc.annotations.Symbol;
025import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
026import org.apache.tapestry5.ioc.services.ThreadLocale;
027import org.apache.tapestry5.services.assets.AssetPathConstructor;
028import org.apache.tapestry5.services.javascript.JavaScriptStack;
029import org.apache.tapestry5.services.javascript.JavaScriptStackSource;
030
031public class JavaScriptStackPathConstructorImpl implements JavaScriptStackPathConstructor
032{
033    private final ThreadLocale threadLocale;
034
035    private final AssetPathConstructor assetPathConstructor;
036
037    private final JavaScriptStackSource javascriptStackSource;
038
039    private final boolean combineScripts;
040
041    private final Mapper<Asset, String> toPath = new Mapper<Asset, String>()
042    {
043        public String map(Asset input)
044        {
045            return input.toClientURL();
046        }
047    };
048
049    public JavaScriptStackPathConstructorImpl(ThreadLocale threadLocale, AssetPathConstructor assetPathConstructor,
050            JavaScriptStackSource javascriptStackSource,
051
052            @Symbol(SymbolConstants.COMBINE_SCRIPTS)
053            boolean combineScripts)
054    {
055        this.threadLocale = threadLocale;
056        this.assetPathConstructor = assetPathConstructor;
057        this.javascriptStackSource = javascriptStackSource;
058        this.combineScripts = combineScripts;
059    }
060
061    public List<String> constructPathsForJavaScriptStack(String stackName)
062    {
063        JavaScriptStack stack = javascriptStackSource.getStack(stackName);
064
065        List<Asset> assets = stack.getJavaScriptLibraries();
066
067        if (assets.size() > 1 && combineScripts)
068            return combinedStackURL(stackName);
069
070        return toPaths(assets);
071    }
072
073    private List<String> toPaths(List<Asset> assets)
074    {
075        assert assets != null;
076        return F.flow(assets).map(toPath).toList();
077    }
078
079    private List<String> combinedStackURL(String stackName)
080    {
081        String path = String.format("%s/%s.js", threadLocale.getLocale().toString(), stackName);
082
083        String stackURL = assetPathConstructor.constructAssetPath(RequestConstants.STACK_FOLDER, path);
084
085        return CollectionFactory.newList(stackURL);
086    }
087
088}