prosody
379faad8ce9f
util/helpers.lua

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util/helpers.lua @ 6342:379faad8ce9f

Merge 0.10->trunk
author Kim Alvefur <zash@zash.se>
date Sat, 09 Aug 2014 21:48:52 +0200
parent 5776:bd0ff8ae98a8
child 6777:5de6b93d0190
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1964
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 --
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5 -- This project is MIT/X11 licensed. Please see the
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6 -- COPYING file in the source package for more information.
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7 --
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8
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9 local debug = require "util.debug";
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10
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11 module("helpers", package.seeall);
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12
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13 -- Helper functions for debugging
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14
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15 local log = require "util.logger".init("util.debug");
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16
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17 function log_host_events(host)
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18 return log_events(prosody.hosts[host].events, host);
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19 end
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20
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21 function revert_log_host_events(host)
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22 return revert_log_events(prosody.hosts[host].events);
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23 end
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24
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25 function log_events(events, name, logger)
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26 local f = events.fire_event;
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27 if not f then
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28 error("Object does not appear to be a util.events object");
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29 end
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30 logger = logger or log;
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31 name = name or tostring(events);
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32 function events.fire_event(event, ...)
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33 logger("debug", "%s firing event: %s", name, event);
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34 return f(event, ...);
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35 end
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36 events[events.fire_event] = f;
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37 return events;
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38 end
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39
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40 function revert_log_events(events)
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41 events.fire_event, events[events.fire_event] = events[events.fire_event], nil; -- :))
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42 end
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43
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44 function show_events(events, specific_event)
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45 local event_handlers = events._handlers;
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46 local events_array = {};
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47 local event_handler_arrays = {};
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48 for event in pairs(events._event_map) do
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49 local handlers = event_handlers[event];
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50 if handlers and (event == specific_event or not specific_event) then
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51 table.insert(events_array, event);
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52 local handler_strings = {};
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53 for i, handler in ipairs(handlers) do
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54 local upvals = debug.string_from_var_table(debug.get_upvalues_table(handler));
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55 handler_strings[i] = " "..i..": "..tostring(handler)..(upvals and ("\n "..upvals) or "");
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56 end
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57 event_handler_arrays[event] = handler_strings;
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58 end
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59 end
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60 table.sort(events_array);
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61 local i = 1;
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62 while i <= #events_array do
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63 local handlers = event_handler_arrays[events_array[i]];
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64 for j=#handlers, 1, -1 do
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65 table.insert(events_array, i+1, handlers[j]);
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66 end
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67 if i > 1 then events_array[i] = "\n"..events_array[i]; end
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68 i = i + #handlers + 1
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69 end
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70 return table.concat(events_array, "\n");
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71 end
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72
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73 function get_upvalue(f, get_name)
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74 local i, name, value = 0;
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75 repeat
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76 i = i + 1;
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77 name, value = debug.getupvalue(f, i);
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78 until name == get_name or name == nil;
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79 return value;
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80 end
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81
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82 return _M;