/*
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Copyright 2013 gitblit.com.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package com.gitblit.wicket.ng;
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import java.text.MessageFormat;
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import java.util.HashMap;
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import java.util.Map;
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import org.apache.wicket.ResourceReference;
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import org.apache.wicket.markup.html.IHeaderContributor;
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import org.apache.wicket.markup.html.IHeaderResponse;
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import com.google.gson.Gson;
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import com.google.gson.GsonBuilder;
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/**
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* Simple AngularJS data controller which injects scoped objects as static,
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* embedded JSON within the generated page. This allows use of AngularJS
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* client-side databinding (magic) with server-generated pages.
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*
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* @author James Moger
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*
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*/
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public class NgController implements IHeaderContributor {
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private static final long serialVersionUID = 1L;
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final String name;
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final Map<String, Object> variables;
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public NgController(String name) {
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this.name = name;
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this.variables = new HashMap<String, Object>();
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}
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public void addVariable(String name, Object o) {
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variables.put(name, o);
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}
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@Override
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public void renderHead(IHeaderResponse response) {
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// add Google AngularJS reference
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response.renderJavascriptReference(new ResourceReference(NgController.class, "angular.js"));
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Gson gson = new GsonBuilder().create();
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StringBuilder sb = new StringBuilder();
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line(sb, MessageFormat.format("<!-- AngularJS {0} data controller -->", name));
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line(sb, MessageFormat.format("function {0}($scope) '{'", name));
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for (Map.Entry<String, Object> entry : variables.entrySet()) {
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String var = entry.getKey();
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Object o = entry.getValue();
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String json = gson.toJson(o);
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line(sb, MessageFormat.format("\t$scope.{0} = {1};", var, json));
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}
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line(sb, "}");
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response.renderJavascript(sb.toString(), null);
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}
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private void line(StringBuilder sb, String line) {
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sb.append(line);
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sb.append('\n');
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}
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}
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