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/*
 * Copyright 2008-2013 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.broadleafcommerce.cms.admin.web.controller;

import org.broadleafcommerce.cms.admin.web.service.AssetFormBuilderService;
import org.broadleafcommerce.cms.file.domain.StaticAssetImpl;
import org.broadleafcommerce.cms.file.service.StaticAssetService;
import org.broadleafcommerce.openadmin.web.controller.entity.AdminBasicEntityController;
import org.broadleafcommerce.openadmin.web.form.component.ListGrid;
import org.broadleafcommerce.openadmin.web.form.entity.EntityForm;
import org.broadleafcommerce.openadmin.web.form.entity.EntityFormAction;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.util.MultiValueMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Handles admin operations for the {@link Asset} entity. This is mostly to support displaying image assets inline 
 * in listgrids.
 * 
 * @author Andre Azzolini (apazzolini)
 */
@Controller("blAdminAssetController")
@RequestMapping("/" + AdminAssetController.SECTION_KEY)
public class AdminAssetController extends AdminBasicEntityController {
    
    protected static final String SECTION_KEY = "assets";
    
    @Resource(name = "blAssetFormBuilderService")
    protected AssetFormBuilderService formService;
    
    @Resource(name = "blStaticAssetService")
    protected StaticAssetService staticAssetService;
    
    @Override
    protected String getSectionKey(Map pathVars) {
        //allow external links to work for ToOne items
        if (super.getSectionKey(pathVars) != null) {
            return super.getSectionKey(pathVars);
        }
        return SECTION_KEY;
    }
    
    @Override
    @SuppressWarnings("unchecked")
    @RequestMapping(value = "", method = RequestMethod.GET)
    public String viewEntityList(HttpServletRequest request, HttpServletResponse response, Model model,
            @PathVariable  Map pathVars,
            @RequestParam  MultiValueMap requestParams) throws Exception {
        String returnPath = super.viewEntityList(request, response, model, pathVars, requestParams);
        
        // Remove the default add button and replace it with an upload asset button
        List mainActions = (List) model.asMap().get("mainActions");
        Iterator actions = mainActions.iterator();
        while (actions.hasNext()) {
            EntityFormAction action = actions.next();
            if (EntityFormAction.ADD.equals(action.getId())) {
                actions.remove();
                break;
            }
        }
        mainActions.add(0, new EntityFormAction("UPLOAD_ASSET")
                .withButtonClass("upload-asset")
                .withIconClass("icon-camera")
                .withDisplayText("Upload_Asset"));

        // Change the listGrid view to one that has a hidden form for uploading the image.
        model.addAttribute("viewType", "entityListWithUploadForm");
        
        ListGrid listGrid = (ListGrid) model.asMap().get("listGrid");
        formService.addImageThumbnailField(listGrid, "fullUrl");

        return returnPath;
    }

    @Override
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public String viewEntityForm(HttpServletRequest request, HttpServletResponse response, Model model,
            @PathVariable  Map pathVars,
            @PathVariable(value="id") String id) throws Exception {
        model.addAttribute("cmsUrlPrefix", staticAssetService.getStaticAssetUrlPrefix());
        return super.viewEntityForm(request, response, model, pathVars, id);
    }
    
    @Override
    @RequestMapping(value = "/{id}", method = RequestMethod.POST)
    public String saveEntity(HttpServletRequest request, HttpServletResponse response, Model model,
            @PathVariable  Map pathVars,
            @PathVariable(value="id") String id,
            @ModelAttribute(value="entityForm") EntityForm entityForm, BindingResult result,
            RedirectAttributes ra) throws Exception {
        String templatePath = super.saveEntity(request, response, model, pathVars, id, entityForm, result, ra);
        if (result.hasErrors()) {
            model.addAttribute("cmsUrlPrefix", staticAssetService.getStaticAssetUrlPrefix());
        }
        return templatePath;
    }

    @Override
    protected String getDefaultEntityType() {
        return StaticAssetImpl.class.getName();
    }

}