aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Region/Environment/Modules/Framework/Commander.cs
blob: d226c3da2daaafedb5861aa5431fd4015d3cdbdf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
/*
 * Copyright (c) Contributors, http://opensimulator.org/
 * See CONTRIBUTORS.TXT for a full list of copyright holders.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the OpenSim Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using log4net;
using OpenSim.Framework;
using OpenSim.Region.Environment.Interfaces;

namespace OpenSim.Region.Environment.Modules.Framework
{
    /// <summary>
    /// A single function call encapsulated in a class which enforces arguments when passing around as Object[]'s.
    /// Used for console commands and script API generation
    /// </summary>
    public class Command : ICommand
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        private readonly List<CommandArgument> m_args = new List<CommandArgument>();

        private readonly Action<object[]> m_command;
        private readonly string m_help;
        private readonly string m_name;

        public Command(string name, Action<Object[]> command, string help)
        {
            m_name = name;
            m_command = command;
            m_help = help;
        }

        #region ICommand Members

        public void AddArgument(string name, string helptext, string type)
        {
            m_args.Add(new CommandArgument(name, helptext, type));
        }

        public string Name
        {
            get { return m_name; }
        }

        public string Help
        {
            get { return m_help; }
        }

        public Dictionary<string, string> Arguments
        {
            get
            {
                Dictionary<string, string> tmp = new Dictionary<string, string>();
                foreach (CommandArgument arg in m_args)
                {
                    tmp.Add(arg.Name, arg.ArgumentType);
                }
                return tmp;
            }
        }

        public void ShowConsoleHelp()
        {
            m_log.Info("== " + Name + " ==");
            m_log.Info(m_help);
            m_log.Info("= Parameters =");
            foreach (CommandArgument arg in m_args)
            {
                m_log.Info("* " + arg.Name + " (" + arg.ArgumentType + ")");
                m_log.Info("\t" + arg.HelpText);
            }
        }

        public void Run(Object[] args)
        {
            Object[] cleanArgs = new Object[m_args.Count];

            if (args.Length < cleanArgs.Length)
            {
                m_log.Error("Missing " + (cleanArgs.Length - args.Length) + " argument(s)");
                ShowConsoleHelp();
                return;
            }
            if (args.Length > cleanArgs.Length)
            {
                m_log.Error("Too many arguments for this command. Type '<module> <command> help' for help.");
                return;
            }

            int i = 0;
            foreach (Object arg in args)
            {
                if (string.IsNullOrEmpty(arg.ToString()))
                {
                    m_log.Error("Empty arguments are not allowed");
                    return;
                }
                try
                {
                    switch (m_args[i].ArgumentType)
                    {
                        case "String":
                            m_args[i].ArgumentValue = arg.ToString();
                            break;
                        case "Integer":
                            m_args[i].ArgumentValue = Int32.Parse(arg.ToString());
                            break;
                        case "Double":
                            m_args[i].ArgumentValue = Double.Parse(arg.ToString());
                            break;
                        case "Boolean":
                            m_args[i].ArgumentValue = Boolean.Parse(arg.ToString());
                            break;
                        default:
                            m_log.Error("Unknown desired type for argument " + m_args[i].Name + " on command " + m_name);
                            break;
                    }
                }
                catch (FormatException)
                {
                    m_log.Error("Argument number " + (i + 1) +
                                " (" + m_args[i].Name + ") must be a valid " +
                                m_args[i].ArgumentType.ToLower() + ".");
                }
                cleanArgs[i] = m_args[i].ArgumentValue;

                i++;
            }

            m_command.Invoke(cleanArgs);
        }

        #endregion
    }

    /// <summary>
    /// A single command argument, contains name, type and at runtime, value.
    /// </summary>
    public class CommandArgument
    {
        private readonly string m_help;
        private readonly string m_name;
        private readonly string m_type;
        private Object m_val;

        public CommandArgument(string name, string help, string type)
        {
            m_name = name;
            m_help = help;
            m_type = type;
        }

        public string Name
        {
            get { return m_name; }
        }

        public string HelpText
        {
            get { return m_help; }
        }

        public string ArgumentType
        {
            get { return m_type; }
        }

        public Object ArgumentValue
        {
            get { return m_val; }
            set { m_val = value; }
        }
    }

    /// <summary>
    /// A class to enable modules to register console and script commands, which enforces typing and valid input.
    /// </summary>
    public class Commander : ICommander
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        private readonly Dictionary<string, ICommand> m_commands = new Dictionary<string, ICommand>();
        private readonly string m_name;

        public Commander(string name)
        {
            m_name = name;
        }

        #region ICommander Members

        public void RegisterCommand(string commandName, ICommand command)
        {
            m_commands[commandName] = command;
        }

        /// <summary>
        /// Generates a runtime C# class which can be compiled and inserted via reflection to enable modules to register new script commands
        /// </summary>
        /// <returns>Returns C# source code to create a binding</returns>
        public string GenerateRuntimeAPI()
        {
            string classSrc = "\n\tpublic class " + m_name + " {\n";
            foreach (ICommand com in m_commands.Values)
            {
                classSrc += "\tpublic void " + EscapeRuntimeAPICommand(com.Name) + "( ";
                foreach (KeyValuePair<string, string> arg in com.Arguments)
                {
                    classSrc += arg.Value + " " + Util.Md5Hash(arg.Key) + ",";
                }
                classSrc = classSrc.Remove(classSrc.Length - 1); // Delete the last comma
                classSrc += " )\n\t{\n";
                classSrc += "\t\tObject[] args = new Object[" + com.Arguments.Count + "];\n";
                int i = 0;
                foreach (KeyValuePair<string, string> arg in com.Arguments)
                {
                    classSrc += "\t\targs[" + i + "] = " + Util.Md5Hash(arg.Key) + "  " + ";\n";
                    i++;
                }
                classSrc += "\t\tGetCommander(\"" + m_name + "\").Run(\"" + com.Name + "\", args);\n";
                classSrc += "\t}\n";
            }
            classSrc += "}\n";

            return classSrc;
        }

        /// <summary>
        /// Runs a specified function with attached arguments
        /// *** <b>DO NOT CALL DIRECTLY.</b> ***
        /// Call ProcessConsoleCommand instead if handling human input.
        /// </summary>
        /// <param name="function">The function name to call</param>
        /// <param name="args">The function parameters</param>
        public void Run(string function, object[] args)
        {
            m_commands[function].Run(args);
        }

        public void ProcessConsoleCommand(string function, string[] args)
        {
            if (m_commands.ContainsKey(function))
            {
                if (args.Length > 0 && args[0] == "help")
                {
                    m_commands[function].ShowConsoleHelp();
                }
                else
                {
                    m_commands[function].Run(args);
                }
            }
            else
            {
                if (function != "help")
                    m_log.Error("Invalid command - No such command exists");
                if (function == "api")
                    m_log.Info(GenerateRuntimeAPI());
                ShowConsoleHelp();
            }
        }

        #endregion

        private void ShowConsoleHelp()
        {
            m_log.Info("===" + m_name + "===");
            foreach (ICommand com in m_commands.Values)
            {
                m_log.Info("* " + com.Name + " - " + com.Help);
            }
        }

        private string EscapeRuntimeAPICommand(string command)
        {
            command = command.Replace('-', '_');
            StringBuilder tmp = new StringBuilder(command);
            tmp[0] = tmp[0].ToString().ToUpper().ToCharArray()[0];

            return tmp.ToString();
        }
    }
}