verse
6297d658769f
plugins/adhoc.lua

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plugins/adhoc.lua @ 309:6297d658769f

plugins.adhoc: Collect a <note/>
author Kim Alvefur <zash@zash.se>
date Wed, 04 Jul 2012 03:37:16 +0200
parent 308:2bcc97bc5f43
child 340:0ce227f6034c
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a5ac643a7fd6 added local verse var to all plugins
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1 local verse = require "verse";
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2 local adhoc = require "lib.adhoc";
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3
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4 local xmlns_commands = "http://jabber.org/protocol/commands";
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5 local xmlns_data = "jabber:x:data";
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6
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7 local command_mt = {};
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8 command_mt.__index = command_mt;
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9
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10 -- Table of commands we provide
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11 local commands = {};
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12
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13 function verse.plugins.adhoc(stream)
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14 stream:add_plugin("disco");
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15 stream:add_disco_feature(xmlns_commands);
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16
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17 function stream:query_commands(jid, callback)
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18 stream:disco_items(jid, xmlns_commands, function (items)
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19 stream:debug("adhoc list returned")
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20 local command_list = {};
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21 for _, item in ipairs(items) do
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22 command_list[item.node] = item.name;
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23 end
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24 stream:debug("adhoc calling callback")
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25 return callback(command_list);
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26 end);
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27 end
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28
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29 function stream:execute_command(jid, command, callback)
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30 local cmd = setmetatable({
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31 stream = stream, jid = jid,
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32 command = command, callback = callback
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33 }, command_mt);
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34 return cmd:execute();
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35 end
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36
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37 -- ACL checker for commands we provide
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38 local function has_affiliation(jid, aff)
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39 if not(aff) or aff == "user" then return true; end
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40 if type(aff) == "function" then
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41 return aff(jid);
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42 end
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43 -- TODO: Support 'roster', etc.
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44 end
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45
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46 function stream:add_adhoc_command(name, node, handler, permission)
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47 commands[node] = adhoc.new(name, node, handler, permission);
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48 stream:add_disco_item({ jid = stream.jid, node = node, name = name }, xmlns_commands);
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49 return commands[node];
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50 end
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51
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52 local function handle_command(stanza)
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53 local command_tag = stanza.tags[1];
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54 local node = command_tag.attr.node;
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55
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56 local handler = commands[node];
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57 if not handler then return; end
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58
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59 if not has_affiliation(stanza.attr.from, handler.permission) then
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60 stream:send(verse.error_reply(stanza, "auth", "forbidden", "You don't have permission to execute this command"):up()
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61 :add_child(handler:cmdtag("canceled")
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62 :tag("note", {type="error"}):text("You don't have permission to execute this command")));
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63 return true
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64 end
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65
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66 -- User has permission now execute the command
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67 return adhoc.handle_cmd(handler, { send = function (d) return stream:send(d) end }, stanza);
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68 end
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69
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70 stream:hook("iq/"..xmlns_commands, function (stanza)
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71 local type = stanza.attr.type;
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72 local name = stanza.tags[1].name;
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73 if type == "set" and name == "command" then
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74 return handle_command(stanza);
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75 end
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76 end);
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77 end
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78
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79 function command_mt:_process_response(result)
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80 if result.type == "error" then
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81 self.status = "canceled";
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82 self.callback(self, {});
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83 end
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84 local command = result:get_child("command", xmlns_commands);
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85 self.status = command.attr.status;
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86 self.sessionid = command.attr.sessionid;
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87 self.form = command:get_child("x", xmlns_data);
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88 self.note = command:get_child("note"); --FIXME handle multiple <note/>s
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89 self.callback(self);
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90 end
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91
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92 -- Initial execution of a command
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93 function command_mt:execute()
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94 local iq = verse.iq({ to = self.jid, type = "set" })
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95 :tag("command", { xmlns = xmlns_commands, node = self.command });
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96 self.stream:send_iq(iq, function (result)
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97 self:_process_response(result);
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98 end);
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99 end
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100
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101 function command_mt:next(form)
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102 local iq = verse.iq({ to = self.jid, type = "set" })
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103 :tag("command", {
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104 xmlns = xmlns_commands,
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105 node = self.command,
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106 sessionid = self.sessionid
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107 });
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108
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109 if form then iq:add_child(form); end
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110
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111 self.stream:send_iq(iq, function (result)
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112 self:_process_response(result);
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113 end);
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114 end