jaroslav@1189: /**
jaroslav@1227:  * Back 2 Browser Bytecode Translator
jaroslav@1227:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@1189:  *
jaroslav@1189:  * This program is free software: you can redistribute it and/or modify
jaroslav@1189:  * it under the terms of the GNU General Public License as published by
jaroslav@1189:  * the Free Software Foundation, version 2 of the License.
jaroslav@1189:  *
jaroslav@1189:  * This program is distributed in the hope that it will be useful,
jaroslav@1189:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@1189:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@1227:  * GNU General Public License for more details.
jaroslav@1189:  *
jaroslav@1189:  * You should have received a copy of the GNU General Public License
jaroslav@1189:  * along with this program. Look for COPYING file in the top folder.
jaroslav@1227:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@1189:  */
jaroslav@1228: package org.apidesign.bck2brwsr.ko2brwsr;
jaroslav@1189: 
jaroslav@1199: import java.io.ByteArrayOutputStream;
jaroslav@1196: import java.io.IOException;
jaroslav@1196: import java.io.InputStream;
jaroslav@1196: import java.io.InputStreamReader;
jaroslav@1425: import org.apidesign.bck2brwsr.core.JavaScriptBody;
jaroslav@1189: import org.apidesign.html.json.spi.JSONCall;
jaroslav@1189: import org.apidesign.html.json.spi.Transfer;
jaroslav@1253: import org.apidesign.html.json.spi.WSTransfer;
jaroslav@1189: 
jaroslav@1189: /**
jaroslav@1189:  *
jaroslav@1189:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@1189:  */
jaroslav@1420: final class BrwsrCtxImpl implements Transfer, WSTransfer<LoadWS> {
jaroslav@1220:     private BrwsrCtxImpl() {}
jaroslav@1189:     
jaroslav@1220:     public static final BrwsrCtxImpl DEFAULT = new BrwsrCtxImpl();
jaroslav@1189:     
jaroslav@1189:     @Override
jaroslav@1189:     public void extract(Object obj, String[] props, Object[] values) {
jaroslav@1425:         extractJSON(obj, props, values);
jaroslav@1189:     }
jaroslav@1189: 
jaroslav@1189:     @Override
jaroslav@1189:     public void loadJSON(final JSONCall call) {
jaroslav@1189:         class R implements Runnable {
jaroslav@1254:             final boolean success;
jaroslav@1254: 
jaroslav@1254:             public R(boolean success) {
jaroslav@1254:                 this.success = success;
jaroslav@1254:             }
jaroslav@1254:             
jaroslav@1189:             Object[] arr = { null };
jaroslav@1189:             @Override
jaroslav@1189:             public void run() {
jaroslav@1254:                 if (success) {
jaroslav@1254:                     call.notifySuccess(arr[0]);
jaroslav@1254:                 } else {
jaroslav@1254:                     Throwable t;
jaroslav@1254:                     if (arr[0] instanceof Throwable) {
jaroslav@1254:                         t = (Throwable) arr[0];
jaroslav@1254:                     } else {
jaroslav@1254:                         if (arr[0] == null) {
jaroslav@1254:                             t = new IOException();
jaroslav@1254:                         } else {
jaroslav@1254:                             t = new IOException(arr[0].toString());
jaroslav@1254:                         }
jaroslav@1254:                     }
jaroslav@1254:                     call.notifyError(t);
jaroslav@1254:                 }
jaroslav@1189:             }
jaroslav@1189:         }
jaroslav@1254:         R success = new R(true);
jaroslav@1254:         R failure = new R(false);
jaroslav@1189:         if (call.isJSONP()) {
jaroslav@1425:             String me = createJSONP(success.arr, success);
jaroslav@1425:             loadJSONP(call.composeURL(me), me);
jaroslav@1189:         } else {
jaroslav@1199:             String data = null;
jaroslav@1199:             if (call.isDoOutput()) {
jaroslav@1199:                 try {
jaroslav@1199:                     ByteArrayOutputStream bos = new ByteArrayOutputStream();
jaroslav@1199:                     call.writeData(bos);
jaroslav@1199:                     data = new String(bos.toByteArray(), "UTF-8");
jaroslav@1199:                 } catch (IOException ex) {
jaroslav@1199:                     call.notifyError(ex);
jaroslav@1199:                 }
jaroslav@1199:             }
jaroslav@1425:             loadJSON(call.composeURL(null), success.arr, success, failure, call.getMethod(), data);
jaroslav@1189:         }
jaroslav@1189:     }
jaroslav@1189: 
jaroslav@1189:     @Override
jaroslav@1196:     public Object toJSON(InputStream is) throws IOException {
jaroslav@1196:         StringBuilder sb = new StringBuilder();
jaroslav@1196:         InputStreamReader r = new InputStreamReader(is);
jaroslav@1196:         for (;;) {
jaroslav@1196:             int ch = r.read();
jaroslav@1196:             if (ch == -1) {
jaroslav@1196:                 break;
jaroslav@1196:             }
jaroslav@1196:             sb.append((char)ch);
jaroslav@1196:         }
jaroslav@1425:         return parse(sb.toString());
jaroslav@1196:     }
jaroslav@1249: 
jaroslav@1249:     @Override
jaroslav@1253:     public LoadWS open(String url, JSONCall callback) {
jaroslav@1253:         return new LoadWS(callback, url);
jaroslav@1253:     }
jaroslav@1253: 
jaroslav@1253:     @Override
jaroslav@1253:     public void send(LoadWS socket, JSONCall data) {
jaroslav@1253:         socket.send(data);
jaroslav@1253:     }
jaroslav@1253: 
jaroslav@1253:     @Override
jaroslav@1253:     public void close(LoadWS socket) {
jaroslav@1253:         socket.close();
jaroslav@1253:     }
jaroslav@1425:     
jaroslav@1425:     //
jaroslav@1425:     // implementations
jaroslav@1425:     //
jaroslav@1425:     
jaroslav@1425:     @JavaScriptBody(args = {"object", "property"},
jaroslav@1425:         body
jaroslav@1425:         = "if (property === null) return object;\n"
jaroslav@1425:         + "if (object === null) return null;\n"
jaroslav@1425:         + "var p = object[property]; return p ? p : null;"
jaroslav@1425:     )
jaroslav@1425:     private static Object getProperty(Object object, String property) {
jaroslav@1425:         return null;
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     public static String createJSONP(Object[] jsonResult, Runnable whenDone) {
jaroslav@1425:         int h = whenDone.hashCode();
jaroslav@1425:         String name;
jaroslav@1425:         for (;;) {
jaroslav@1425:             name = "jsonp" + Integer.toHexString(h);
jaroslav@1425:             if (defineIfUnused(name, jsonResult, whenDone)) {
jaroslav@1425:                 return name;
jaroslav@1425:             }
jaroslav@1425:             h++;
jaroslav@1425:         }
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     @JavaScriptBody(args = {"name", "arr", "run"}, body
jaroslav@1425:         = "if (window[name]) return false;\n "
jaroslav@1425:         + "window[name] = function(data) {\n "
jaroslav@1425:         + "  delete window[name];\n"
jaroslav@1425:         + "  var el = window.document.getElementById(name);\n"
jaroslav@1425:         + "  el.parentNode.removeChild(el);\n"
jaroslav@1425:         + "  arr[0] = data;\n"
jaroslav@1425:         + "  run.run__V();\n"
jaroslav@1425:         + "};\n"
jaroslav@1425:         + "return true;\n"
jaroslav@1425:     )
jaroslav@1425:     private static boolean defineIfUnused(String name, Object[] arr, Runnable run) {
jaroslav@1425:         return true;
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     @JavaScriptBody(args = {"s"}, body = "return eval('(' + s + ')');")
jaroslav@1425:     static Object parse(String s) {
jaroslav@1425:         return s;
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     @JavaScriptBody(args = {"url", "arr", "callback", "onError", "method", "data"}, body = ""
jaroslav@1425:         + "var request = new XMLHttpRequest();\n"
jaroslav@1425:         + "if (!method) method = 'GET';\n"
jaroslav@1425:         + "request.open(method, url, true);\n"
jaroslav@1425:         + "request.setRequestHeader('Content-Type', 'application/json; charset=utf-8');\n"
jaroslav@1425:         + "request.onreadystatechange = function() {\n"
jaroslav@1425:         + "  if (this.readyState!==4) return;\n"
jaroslav@1425:         + "  try {\n"
jaroslav@1425:         + "    arr[0] = eval('(' + this.response + ')');\n"
jaroslav@1425:         + "  } catch (error) {;\n"
jaroslav@1425:         + "    arr[0] = this.response;\n"
jaroslav@1425:         + "  }\n"
jaroslav@1425:         + "  callback.run__V();\n"
jaroslav@1425:         + "};\n"
jaroslav@1425:         + "request.onerror = function (e) {\n"
jaroslav@1425:         + "  arr[0] = e; onError.run__V();\n"
jaroslav@1425:         + "}\n"
jaroslav@1425:         + "if (data) request.send(data);"
jaroslav@1425:         + "else request.send();"
jaroslav@1425:     )
jaroslav@1425:     static void loadJSON(
jaroslav@1425:         String url, Object[] jsonResult, Runnable whenDone, Runnable whenErr, String method, String data
jaroslav@1425:     ) {
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     @JavaScriptBody(args = {"url", "jsonp"}, body
jaroslav@1425:         = "var scrpt = window.document.createElement('script');\n "
jaroslav@1425:         + "scrpt.setAttribute('src', url);\n "
jaroslav@1425:         + "scrpt.setAttribute('id', jsonp);\n "
jaroslav@1425:         + "scrpt.setAttribute('type', 'text/javascript');\n "
jaroslav@1425:         + "var body = document.getElementsByTagName('body')[0];\n "
jaroslav@1425:         + "body.appendChild(scrpt);\n"
jaroslav@1425:     )
jaroslav@1425:     static void loadJSONP(String url, String jsonp) {
jaroslav@1425: 
jaroslav@1425:     }
jaroslav@1425: 
jaroslav@1425:     public static void extractJSON(Object jsonObject, String[] props, Object[] values) {
jaroslav@1425:         for (int i = 0; i < props.length; i++) {
jaroslav@1425:             values[i] = getProperty(jsonObject, props[i]);
jaroslav@1425:         }
jaroslav@1425:     }
jaroslav@1425:     
jaroslav@1189: }