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<%@ page import="java.util.*" %>
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<%
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/*
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 * Copyright 2005 The Apache Software Foundation.
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 *
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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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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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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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%>
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<%!
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    /*
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     * A library file to produce i18n web applications. This can be easily
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     * reused from your jsp(s) - just include and call any methods.
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     * @author toshi
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     */
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    // private variable
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    HttpServletRequest _req = null;
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    // private variable
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    String _strResourceName = null;
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    /**
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     * Set a HttpServletRequest to a private variable.
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     * @param request HttpServletRequest
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     */
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    void setRequest(HttpServletRequest request) {
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        _req = request;
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    }
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    /**
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     * Get the private variable of the HttpServletRequest.
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     * @return HttpServletRequest
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     */
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    HttpServletRequest getRequest() {
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        return _req;
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    }
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    /**
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     * Set a resouce base name to a private variable.
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     * @param resouce The resouce base name
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     */
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    void setResouceBase(String resource) {
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        _strResourceName = resource;
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    }
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    /**
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     * Get the private variable of the resouce base name.
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     * @return resouce The resouce base name
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     */
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    String getResouceBase() {
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        return _strResourceName;
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    }
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    /**
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     * Get a ResourceBundle object.
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     * @return a ResourceBundle object
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     */
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    ResourceBundle getRB() {
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        String strLocale = getRequest().getParameter("locale");
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        ResourceBundle objRb = null;
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        Locale objLcl = null;
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        if (strLocale!=null) {
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            objLcl=new Locale(strLocale,"");
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        } else {
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            objLcl=getRequest().getLocale();
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        }
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        Locale.setDefault(objLcl);
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        objRb = ResourceBundle.getBundle(getResouceBase(),objLcl);
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        return objRb;
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    }
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    /**
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     * Get a list of locale choice
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     * @return a list of supported locales
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     */
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    String getLocaleChoice() {
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        String choice = getMessage("locales");
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        StringBuffer buf = new StringBuffer();
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        buf.append("<div align=\"right\">\n");
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        buf.append(getMessage("language"));
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        buf.append(": ");
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        StringTokenizer st = new StringTokenizer(choice);
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        String locale = null;
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        while (st.hasMoreTokens()) {
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            locale = st.nextToken();
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            buf.append("[<a href=\"?locale="+ locale +"\">"+ locale +"</a>] ");
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        }
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        buf.append("\n</div>\n");
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        return buf.toString();
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @return The formatted message
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     */
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    String getMessage(String key) {
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        return getMessage(key, null, null, null, null, null);
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @param arg0 The argument to place in variable {0}
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     * @return The formatted message
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     */
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    String getMessage(String key, String arg0) {
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        return getMessage(key, arg0, null, null, null, null);
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @param arg0 The argument to place in variable {0}
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     * @param arg1 The argument to place in variable {1}
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     * @return The formatted message
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     */
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    String getMessage(String key, String arg0, String arg1) {
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        return getMessage(key, arg0, arg1, null, null, null);
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @param arg0 The argument to place in variable {0}
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     * @param arg1 The argument to place in variable {1}
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     * @param arg2 The argument to place in variable {2}
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     * @return The formatted message
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     */
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    String getMessage(String key, String arg0, String arg1, String arg2) {
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        return getMessage(key, arg0, arg1, arg2, null, null);
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @param arg0 The argument to place in variable {0}
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     * @param arg1 The argument to place in variable {1}
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     * @param arg2 The argument to place in variable {2}
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     * @param arg3 The argument to place in variable {3}
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     * @return The formatted message
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     */
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    String getMessage(String key, String arg0, String arg1,
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                      String arg2, String arg3) {
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        return getMessage(key, arg0, arg1, arg2, arg3, null);
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    }
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    /**
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     * Get a message from i18n.properties with several arguments.
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     * @param key The resource key
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     * @param arg0 The argument to place in variable {0}
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     * @param arg1 The argument to place in variable {1}
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     * @param arg2 The argument to place in variable {2}
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     * @param arg3 The argument to place in variable {3}
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     * @param arg4 The argument to place in variable {4}
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     * @return The formatted message
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     */
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    String getMessage(String key, String arg0, String arg1,
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                      String arg2, String arg3, String arg4) {
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        String strPattern = getRB().getString(key);
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        String [] params = { arg0, arg1, arg2, arg3, arg4 };
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        for (int i=0; i<5; i++) {
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            if (params[i]!=null) params[i]=replaceAll(params[i],"%20"," ");
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        }
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        if (arg0!=null) strPattern = replaceAll(strPattern,"{0}",params[0]);
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        if (arg1!=null) strPattern = replaceAll(strPattern,"{1}",params[1]);
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        if (arg2!=null) strPattern = replaceAll(strPattern,"{2}",params[2]);
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        if (arg3!=null) strPattern = replaceAll(strPattern,"{3}",params[3]);
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        if (arg4!=null) strPattern = replaceAll(strPattern,"{4}",params[4]);
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        return strPattern;
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    }
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    /**
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     * Get a replaced string by the specified message.
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     * @param source  The original message
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     * @param pattern The key message for replacing
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     * @param replace The message to place in the key variable - 'pattern'
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     * @return The replaced message
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     */
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    String replaceAll(String source, String pattern, String replace)
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    {
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        int i=0;
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        boolean ret = false;
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        StringBuffer buf = new StringBuffer();
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        int lenSource  = source.length();
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        int lenPattern = pattern.length();
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        for (i=0; i<lenSource; i++) {
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            ret = source.regionMatches(i, pattern, 0, lenPattern);
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            if (ret) {
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                buf.append(source.substring(0,i));
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                buf.append(replace);
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                buf.append(source.substring(i+lenPattern));
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                source = replaceAll(buf.toString(), pattern, replace);
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                break;
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            }
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        }
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        return source;
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    }
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%>
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