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annotate mod_muc_badge/mod_muc_badge.lua @ 5553:67152838afbc

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mod_http_oauth2: Improve error messages for URI properties Since there are separate validation checks for URI properties, including that they should use https, with better and more specific error reporting. Reverts 'luaPattern' to 'pattern' which is not currently supported by util.jsonschema, but allows anything that retrieves the schema over http to validate against it, should they wish to do so.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 18:15:00 +0200
parents 8a4b17e2e984
children
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774845606d73 mod_muc_badge: Generates a SVG badge with the number of occupants in rooms
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1 -- MIT License
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2 --
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3 -- Copyright (c) 2018 Kim Alvefur
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4 --
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5 -- Permission is hereby granted, free of charge, to any person obtaining a copy
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6 -- of this software and associated documentation files (the "Software"), to deal
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7 -- in the Software without restriction, including without limitation the rights
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8 -- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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9 -- copies of the Software, and to permit persons to whom the Software is
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10 -- furnished to do so, subject to the following conditions:
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11 --
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12 -- The above copyright notice and this permission notice shall be included in
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13 -- all copies or substantial portions of the Software.
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14 --
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15 -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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16 -- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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17 -- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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18 -- IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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19 -- CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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20 -- TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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21 -- SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22
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23 module:depends"http";
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24
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25 local jid_prep = require "util.jid".prep;
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26 local jid_split = require "util.jid".split;
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27
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28 -- Support both old and new MUC code
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29 local mod_muc = module:depends"muc";
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30 local rooms = rawget(mod_muc, "rooms");
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31 local get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or
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32 function (jid)
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33 return rooms[jid];
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34 end
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35
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36 -- I believe the origins of this template to be in the public domain as per
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37 -- https://github.com/badges/shields/blob/master/LICENSE.md
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38 local template = module:get_option_string("badge_template", [[
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39 <?xml version="1.0"?>
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40 <svg xmlns="http://www.w3.org/2000/svg" width="{width}" height="20">
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41 <linearGradient id="b" x2="0" y2="100%">
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42 <stop offset="0" stop-color="#bbb" stop-opacity=".1"/>
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43 <stop offset="1" stop-opacity=".1"/>
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44 </linearGradient>
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45 <clipPath id="a">
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46 <rect width="{width}" height="20" rx="3" fill="#fff"/>
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47 </clipPath>
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48 <g clip-path="url(#a)">
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49 <path fill="#555" d="M0 0h{labelwidth}v20H0z"/>
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50 <path fill="#fe7d37" d="M{labelwidth} 0h{countwidth}v20H{labelwidth}z"/>
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51 <path fill="url(#b)" d="M0 0h{width}v20H0z"/>
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52 </g>
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53 <g fill="#fff" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11" xml:space="preserve">
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54 <text fill="#010101" fill-opacity=".3" y="14" x="0" textLength="{labelwidth}">{label}</text>
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55 <text y="13" x="0" textLength="{labelwidth}">{label}</text>
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56 <text fill="#010101" fill-opacity=".3" y="14" x="{labelwidth}" textLength="{countwidth}">{number}</text>
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57 <text y="13" x="{labelwidth}" textLength="{countwidth}">{number}</text>
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58 </g>
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59 </svg>
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60 ]]);
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61 template = assert(require "util.template"(template));
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62
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63 local number = module:get_option_string("badge_count", "%d online");
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64 local charwidth = 7;
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65
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66 module:provides("http", {
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67 route = {
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68 ["GET /*"] = function (event, path)
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69 local jid = jid_prep(path);
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70 if not jid then return end
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71
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72 local room = get_room_from_jid(jid);
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73 if not room then return end
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74 if (room.get_hidden or room.is_hidden)(room) then return end
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75
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76 local count = 0;
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77 for _ in pairs(room._occupants) do
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78 count = count + 1;
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79 end
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80 local badge_label = (" %s "):format(room:get_name() or jid_split(jid));
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81 local badge_count = (" %s "):format(string.format(number, count));
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82
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83 local response = event.response;
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84 response.headers.content_type = "image/svg+xml";
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85 local svg = [[<?xml version="1.0"?>]] ..
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86 tostring(template.apply({
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87 label = badge_label;
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88 number = badge_count;
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89 width = ("%d"):format( (#badge_label + #badge_count) * charwidth );
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90 labelwidth = ("%d"):format( #badge_label * charwidth );
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91 countwidth = ("%d"):format( #badge_count * charwidth );
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92 }));
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93 return svg;
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94 end;
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95 }
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96 });