selery.command.execute source code

1 /*
2  * Copyright (c) 2017-2019 sel-project
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a copy
5  * of this software and associated documentation files (the "Software"), to deal
6  * in the Software without restriction, including without limitation the rights
7  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8  * copies of the Software, and to permit persons to whom the Software is
9  * furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in all
12  * copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20  * SOFTWARE.
21  *
22  */
23 /**
24  * Copyright: Copyright (c) 2017-2019 sel-project
25  * License: MIT
26  * Authors: Kripth
27  * Source: $(HTTP github.com/sel-project/selery/source/selery/command/execute.d, selery/command/execute.d)
28  */
29 module selery.command.execute;
30 
31 import std..string : strip, indexOf;
32 import std.traits : isAbstractClass;
33 
34 import selery.command.command : CommandResult, Command;
35 import selery.command.util : CommandSender;
36 
37 const(CommandResult) executeCommand(CommandSender sender, string args) {
38 	args = args.strip;
39 	CommandResult ret = CommandResult.NOT_FOUND;
40 	immutable space = args.indexOf(" ");
41 	immutable name = space == -1 ? args : args[0..space];
42 	auto command = name in sender.availableCommands;
43 	if(command) ret = cast()executeCommand(sender, *command, space == -1 ? "" : args[space+1..$]);
44 	ret.command = name;
45 	return ret;
46 }
47 
48 const(CommandResult) executeCommand(CommandSender sender, Command command, string args) {
49 	CommandResult ret = CommandResult.NOT_FOUND;
50 	foreach(overload ; command.overloads) {
51 		if(overload.callableBy(sender)) {
52 			const result = executeCommand(sender, overload, args);
53 			if(result.successful) return result;
54 			else bestResult(ret, result);
55 		}
56 	}
57 	return ret;
58 }
59 
60 const(CommandResult) executeCommand(CommandSender sender, Command.Overload overload, string args) {
61 	return overload.callArgs(sender, args);
62 }
63 
64 private void bestResult(ref CommandResult current, const CommandResult cmp) {
65 	if(current.result == CommandResult.notFound && cmp.result > CommandResult.notFound || current.result == CommandResult.invalidSyntax && cmp.result > CommandResult.invalidSyntax) {
66 		current.result = cmp.result;
67 		current.args = cast(string[])cmp.args;
68 	}
69 }