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annotate mod_muc_dicebot/mod_muc_dicebot.lua @ 5861:c20a0c8a54ea

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mod_auth_oauth_external: Fix typo
author Kim Alvefur <zash@zash.se>
date Sat, 09 Mar 2024 21:05:00 +0100
parents 785389a2d2b3
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4579
b305814bd930 mod_muc_dicebot: A thing to roll dice
Jonas Schäfer <jonas@wielicki.name>
parents:
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1 local muc = module:depends("muc");
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2 local rand = require"util.random";
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3
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4 local s_match = string.match;
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5 local s_gmatch = string.gmatch;
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6 local t_insert = table.insert;
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7 local t_concat = table.concat;
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8
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9 local rooms = module:get_option_set("muc_dicebot_rooms", nil);
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10 local xmlns_nick = "http://jabber.org/protocol/nick";
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11
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12 local function is_room_affected(roomjid)
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13 return not rooms or rooms:contains(roomjid)
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14 end
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15
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16 local function roll(sides)
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17 if sides > 256 then
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18 return nil, "too many sides"
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19 end
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Jonas Schäfer <jonas@wielicki.name>
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20 local factor = math.floor(256 / sides);
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Jonas Schäfer <jonas@wielicki.name>
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21 local cutoff = sides * factor;
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Jonas Schäfer <jonas@wielicki.name>
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22 module:log("error", "%d -> %d %d %d", sides, max, factor, cutoff);
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23 for i=1,10 do
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24 local randomness = string.byte(rand.bytes(1), 1);
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25 module:log("error", "%d", randomness);
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26 if randomness < cutoff then
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27 return (randomness % sides) + 1
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28 end
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29 end
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30 return nil, "failed to find valid number"
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31 end
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32
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33 local function muc_broadcast_message(event)
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34 if not is_room_affected(event.room.jid) then
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35 return
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36 end
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37
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38 local stanza = event.stanza;
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39 local body = stanza:get_child("body");
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40 if not body then
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41 return
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42 end
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43
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44 local text = body:get_text();
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45 module:log("error", "%q %q %q", stanza, body, text);
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Jonas Schäfer <jonas@wielicki.name>
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46 local dice = s_match(text, "^[%.!]r%s(.+)$");
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47 if not dice or dice == "" then
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48 return
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49 end
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50
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51 local results = {};
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52 local count = 0;
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53 local sum = 0;
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54 for ndice, sep, sides in s_gmatch(dice, "(%d*)([wd]?)(%d+)") do
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55 if not sep or sep == "" then
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56 sides = ndice .. sides
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57 ndice = "1"
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58 end
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59 local ndice = tonumber(ndice);
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60 count = count + ndice;
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61 if count > 100 then
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62 return true
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63 end
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64 local sides = tonumber(sides);
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65 for i=1,ndice do
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66 local value = roll(sides);
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67 t_insert(results, tostring(value));
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68 sum = sum + value;
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69 end
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70 end
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71 body:text("\n⇒ "..t_concat(results, " ").." (sum: "..sum..")");
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72 end
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73
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74 module:hook("muc-broadcast-message", muc_broadcast_message);